The author: Dr. Donald Perkins FRMetS.

Llansadwrn (Anglesey)

Diary notes 2022

Logo: Llansadwrn Weather - Melin Llynnon, Ynys Môn

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Times are GMT (UTC, Z). Observations at this station [ ] are 24-h 09-09 GMT, some others { } occasionally refer to other 24-h periods, extremes (first indications) are are usually 21-21 GMT. When averages are referred to (.) compares with the last decade and [.] with the 30-y climatological average [1991-2020]. All data are subject to verification and amendment.


January 2022

January 1 - Wales was under COVID-19 was on alert level 2 ... Windy in he early hours gusts up to 44 mph. The year began on a dull note with skies overcast and poor visibility. The temperature at 0900 GMT was 12.8C that was the maximum for January. Snow was absent from Eryri, the Snowdonia Mountains. There was a depression 958 mb W of Scotland with a cold front moving S over the Irish Sea, pressure here 1008 mb was rising and the morning brightened with glimpses of sunshine. Breezy. There was a spell of heavy rain during the evening falling at a rate up to 61 mm/h at 2254 GMT. Rainfall in the 24-h ending 0900 GMT on the 2nd was 15.8 mm, largest daily fall of what was to be a fairly dry month for January. On the 2nd we were in a spell of showery weather and at 0900 GMT cumulus clouds were developing and a cumulonimbus was spotted. Thunder was heard at 1100 GMT, heavy rain falling at a rate up of 35 mm/h at 1150 GMT and heavy thunder at 1237 GMT. Sferics were recorded over Red Wharf Bay and Penmon at 1110 GMT. Dates of first flowering snowdrop  in the garden in Llansadwrn winters 1994-2022.A MetO yellow warning had been issued for S and SE England, but not here. Heavy thundery showers affected North Wales, SW Wales and Cornwall. There were heavy showers over the Pennines and Cumbria in the afternoon. Rainfall 24-h ending 0900 GMT on the 2nd 7.8 mm. On the 3rd the first snowdrops of the season were spotted in the garden here at Gadlys. The median date of flowering (data since 1994) is the 4th of January. Last year they appeared on the 1st. It's always nice to see the first ones pop up, sometimes we see them in snow, but not recent years. The first snowdrops of 2022 to open in the garden.A fine and breezy day with glimpses of sunshine. Snow fell in Altnaharra during the morning, none in Snowdonia. Low 990 mb was over Shannon and a cold front over N Scotland was heading S, reaching Cardigan Bay 998 mb at 2100 GMT. The cold front passed over here between 2000 and 0100 GMT the wind backing WSW to NNE'ly with the barometer lowest 999.4 mb at 2055 GMT. A colder morning than of late on the 4th 4.2C at 0900 GMT, when there was a 40% chance of ice precipitation. There were some fine backlit cumulus clouds over the mountains with crepuscular rays. There was a NE'ly breeze with a convergence over the Irish Sea, with snow showers to the north heading towards North Wales through the North Channel. Snow was lying lightly on the mountains at 2500 ft. At 1220 GMT we had a shower of snow pellets and snow, the showers continuing into the afternoon with bright sunshine between. Snow settled at 1000 ft near Ogwen Cottage and lower on the north-facing slopes of the Carneddau. On the 5th with an overnight minimum of 1.2C and -2.0C on the grass there had been further showers of ice precipitation, some was remaining unmelted in the black AWS funnel, but had melted in the copper gauge when 1.7 mm was measured. There was a shower of sleet at 0940 GMT with more snow pellets and sleet in the afternoon. Pressure 1015 mb was rising in the west in a ridge from high 1031 mb Azores and low 982 mb over the Gulf of Bothnia, but at present we were in a N'ly air flow from Arctic regions. Today's maximum was 5.7C, in contrast to the 12.8C on the 1st, this resulting in the lowest daily mean of the month 3.5C. Snow was lying on the Carneddau mountains at 1800 ft. On the morning of the 6th there was a vivid red sunrise over the mountains at 0821 GMT, but 0850 clouds had thickened and there was blustery rain. The wind was strong from the S, Aberdaron reporting gusts of 52 mph as a band of showery rain on a front from the W moved across. A heavy shower of ice precipitation and rain at 1316 GMT as the wind reached 32 mph. The sky was clearing at 0900 GMT on the 7th after a moderate shower of snow pellets that filled the roof gutters. The temperature was 2.8C dewpoint 0.9C with 87% relative humidity. By 0940 GMT the sky was cloudier and kept so into the afternoon. At 1839 GMT the temperature had fallen to 1.3C the day's minimum. Thereafter the temperature rose in warm sector moist air from the S bring rain before midnight. A very dull morning on the 8th with pressure on 994 mb was falling quickly and with recent light to moderate rain turning heavy 16 mm/h at 0922 GMT with ice pellets on a cold front with gale-force wind. The temperature then falling and the wind moderating. Rainfall 24-h to 0900 GMT was 8.4 mm and this was followed by another 9.2 mm that on already saturated ground led to local flash flooding. It was dry overnight with the temperature falling to a minimum 3.2C at 0235 GMT together with a ground frost minimum -1.0C. On the morning of the 9th the sky was overcast with poor misty visibility and spotting with rain at 0900 GMT. Pressure 1000 mb was rising the morning becoming slowly brighter with lighter sky to the SE of the station. Yesterdays standing water had disappeared, but there was a short heavy shower 15.8 mm/h at 1206 GMT. The afternoon kept dull with a slight shower of rain. Much the same on the 10th with low cloud shrouding the mountaintops of Snowdonia, but visibility was good below the cloud base. The SSW'ly breeze was picking up and in warm, sector air the temperature was 8.8C with no overnight frost. Pressure 1013 mb was rising with high-pressure 1027 mb Iberia, 1018 mb Belgium and 1027 mb Gulf of Bothnia. Lows 951 mb SE Greenland and 994 mb Mediterranean. A sunless day with drizzle and slight rain in the afternoon, the maximum 10.4C was at 2029 GMT. A brighter day on the 11th though mostly cloudy with a covering of altocumulus clouds, visibility moderate with the sun shining through mist at 0900 GMT. There had been a touch of ground frost -0.6C and it was cooler at 4.2C dewpoint 3.7C and 97% relative humidity, rising to a maximum of 8.1C. Birds were singing and there were clouds of gnats about. A very damp day with a N'ly air or no wind, washing did not dry on the line it might even have become damper, even with the sky cleared about noon to give a sunny afternoon Valley reporting 3.8h of sunshine. A fine and sunny day on the 12th beginning with 3 oktas cloud cover, cirrus and a few cumuli over the mountaintops, visibility was good with slight mistiness in an inversion. There had been a ground frost -1.5C with heavy dew and slight frost remaining on grass. Pressure 1042 mb was rising with pressure high at the Fastnet Rock and Celtic Sea. A light S'ly breeze picking up, sunny with Valley reporting 6.3h of bright sunshine. The maximum here was 9.7C. Clear overnight with a slight ground frost -0.6C with white frost on the fields early in the morning on the 13th. Pressure was steady on 1041 mb with high 1047 mb N Adriatic having a ridge towards the Celtic Sea. Fine and sunny, there were mist and fog patches in central and SE England, and France. Spent the afternoon on nest box maintenance. Similarly sunny on the 14th with hardly a cloud in the sky. Pressure was on 1027 mb with high 1040 mb over Cardigan Bay. After a ground frost -1.6C with an air minimum of 2.5C the temperature rose to 8.8C just after noon. Sunshine recorded at Valley was 7.0h, highest of the month. The 15th began brightly, but at 0900 GMT the sky was with 6 oktas cover of altocumulus and cumulus clouds increasing. Another ground frost -1.6C but no sign of any frost remaining. Visibility was good revealing little in the way of snow on the mountains of Snowdonia, a few small patches and gully snow remaining. Again fog in central and SE England, and France. A dull day at Valley with no sunshine reported.

The first 15 days were milder than usual the mean temperature 6.6C (+1.1) decadal average & [+1.2] of climatological average. Rainfall was approaching the norm with 53.6 mm (46%) & [52%] of the monthly mean total. There had been 9 days of ground frosts and ice precipitation, mainly small hail.

It was a dull morning on the 16th beginning overcast with little or no wind. A touch of ground frost -0.5C. Visibility was very poor, zero solar radiation was recorded at 0900 GMT, I needed an LED headlamp to read the thermometers in the Stevenson screen. There was a cold front over the North Channel, but pressure 1025 mb was rising solar radiation increasing to 225W m -2 . The afternoon was mostly dry with some glimpses of sunshine and some spots of rain when the cloud thickened. The temperature rose from a minimum of 3.8C to 8.1C, Valley reported 0.7h of sunshine. A bright morning on the 17th with the sky clearing rapidly at 0900 GMT. Crepuscular rays were seen over the Nant Ffrancon Pass. There had been frosted dew on the grass -1.2C and the temperature up from an overnight minimum of 3.8C was 6.6C. Pressure 1039 mb was rising within high-pressure 1039 mb centred over the Severn Estuary. Pressure was low 975 mb over the Gulf of Finland. There was a strong temperature inversion today with temperatures on the summits a surprise to walkers lucky enough to be there. With the maximum here 9.6C it was nice enough in the sunshine to have lunch in the garden. SKIRON Graphic courtesy of the University of Athens.Valley sunshine 6.9h. Early on the 18th there was a red sky over the eastern Snowdonia Mountains and cloud was increasing at 0900 GMT. Pressure 1035 mb was falling with high 1040 mb over Normandy, France. Frontal cloud was lying to the W and NW and there was mist and fog in central parts of central, southern and south-eastern England. A moderate ground frost -2.9C, but the frosted dew had all melted by 0900 GMT. Mostly bright and pleasantly sunny with a maximum of 9.1C here, 9.4C in Bodelwyddan (Rhyl), and 10.1C in Llanfairfechan, but during the evening. Around 08 GMT on the 19th the cold front that had been in the north-west was clearing Anglesey and introducing somewhat cooler air. Pressure on 1039 mb was rising with high 1042 mb Shannon. The temperature just before 0900 GMT was 5.7C dewpoint 5.0C, but the day was fine and bright and it rose to 9.6C at 1254 GMT before turning cooler again with snow and sleet showers at 1610 GMT. Sunshine at Valley 5.2h. Showers (UP) in the evening died out before midnight. Fine and bright on the 20th with the 5 oktas cloud cover at 0900 GMT decreasing, a slight ground frost (-0.3C) and a temperature of 4.1C. Visibility was very good. The greater-spotted woodpeckers were drumming, two answering sounds different pitches. I collected a slight deposit of whitish-pink coloured dust. Yesterday (19th) the University of Athens SKIRON model had predicted a band of Saharan dust lying across central Britain. It's likely the deposit washed out in slight showers of rain, sleet or snow between 1500 GMT and midnight. By 1030 GMT the sky had become mostly cloudy in N Wales, N Ireland and East Anglia with showers off the sea in a N'ly breeze. Most other places remained sunny Morecambe 7.5h and Aberdaron 5.4h, coastal Valley managed 4.7h. Snow on Snowdon (Yr Wyddfa)on 20 Jan 2022.The 21st was very dull and sunless, but fine and dry. Overnight the air minimum had fallen to 0.9C, lowest of the month, and -3.4C on the grass. The 22nd was also fine and dry and again sunless, a case of anticyclonic gloom had set in with the pressure steady on 1039 mb the high 1040 mb centred over the Fastnet Rock, S Ireland. A cold front was anchored over the tip of NW Scotland lying NE (S Norway) to SW over the Atlantic. Maximum solar radiation today was 69 W m -2 at 1248 GMT the total global radiation being 1.38 MJ m -2 . Again fine and dry on the 23rd, but gloomy. Pressure remained high 1035 mb centred 1036 mb over the Solent with warm air mass above. There was the odd snow patch remaining in Eryri, but its going to be one of those Januaries with little snow. Despite the lack of sunshine there was a lot of bird song today, including goldfinches. The sparrows have deserted us this winter, we have only seen one and that only briefly,we usually have 8-12 resident. Another dull day on the 24th, but cooler. Visibility was moderate with dusty haze, but none was deposited. The air minimum overnight was 3.5C, but there was no ground frost lowest 2.0C, the cloud insulating and there was a breeze. The temperature struggled to rise to 4.2C around 13 GMT with 79 W m -2 recorded at 1247 GMT, the lowest maximum of the month as was the mean 3.5C. Yet another dull day on the 25th, the fifth in succession with zero sunshine recorded. Continuing dry the second day concrete and grass was recorded dry. Pressure was steady on 1035 mb here and N Azores, with warm air trapped above. Low 979 mb E Iceland had fronts lying NW of Scotland, there was sunshine in NE Scotland with rain on some northern Isles. Frontal cloud over the Western Isles and Malin Head at midnight was moving slowly south. On the 26th low 998 mb over the Atlantic S of Iceland had the associated front over the North Channel and the Isle of Man. At 0900 GMT there were some breaks in the cloud, it was fine, cool and breezy, and yes there were glimpses of sunshine. Late in the afternoon there were some spots of rain and wetting drizzle. After a maximum of 8.5C the temperature had fallen a little to 7.5C at 17 GMT before starting to rise again. After midnight on the 27th there was light rain with the temperature continuing to rise reaching 9.4C at 0605 GMT until a cold front passed over. At 0900 GMT the temperature was 8.2C and the sky starting to clear rapidly, measured rainfall 0.7 mm the first for six days. Visibility was good though misty with crepuscular rays. The afternoon was sunny and the temperature in sheltered parts of the garden rose to 12.2C (screen temperature 11.7C) and honeybees and a large bumblebee was seen on flowering heathers on the rockery banks in the garden for the first time this year. A dull and breezy day on the 28th, pressure 1033 mb was falling with low 980 Iceland and we had a moderate to strong SW'ly airflow. Drizzle around noon then slight rain and drizzle in the afternoon only amounting to 0.2 mm. Scarlet Elf Cup on a small branch in Gadlys Old Woodland..The 29th began very mild 10.2C at 0900 GMT, 11.8C had been recorded in Llanfairfechan Gorwel Heights at 0124 GMT and 12.1C at Gorddinog AWS at 0827 GMT. Very windy in the north with developing storm Malik (named by the Danish Weather Service) expected 960 mb Baltic at midnight. A gust of 85 mph was recorded at Inverbrevie and 68 mph in Newcastle where there was structural damage, and Capel Curig 51 mph. Two deaths occurred in Scotland and Staffordshire due to falling trees. The electricity supply in many places was disrupted in the north. Hard on the heals of Malik 969 mb over the Baltic a second Atlantic storm Corrie was brewing expected off Aberdeen 998 mb at midnight on the 30th. At 0900 GMT it was calm here before a SSW'ly picked up. The Coastguard Helicopter based in Caernarfon passed over here at 0950 GMT heading in the direction of Red Wharf Bay. It was very windy again in Newcastle and Scotland with further electricity outages reported. Found this beautiful, but scarce Scarlet Elf Cup Sacroscypha sustriaca growing on a small decaying branch in the damp Old Woodland at Gadlys (above left). A nice morning here with some sunshine before turning dull and windy at 18 GMT when the small, but intense storm Corrie was traversing N Scotland. The wind had veered NW'ly so that we were sheltered from the worst, but roaring could be heard in the tall trees. Lowest pressure here was 1019 mb at 1830 GMT and a gust of 37 mph was recorded at 1810 GMT. The 31st began fine though mostly cloudy it was brightening up at 0900 GMT. With pressure high 1042 mb over the Atlantic to the SW pressure 1028 mb was rising with Corrie 999 mb now over the North Sea. The wind was NW'ly still and sheltered in the garden. A red squirrel was on the met area eating a hazel nut and was unconcerned as I approached, they are used to me being around and after all I do fill up their feeding boxes. There are about 4 or 5 different squirrels around at the moment varying in size and colour from light to dark red, and a dark greyish red. Windy on the mountains a gust of 61 mph recorded in Capel Curig. Some sunny spells in the afternoon becoming cloudier with rain later (3.1 mm).

The month ended with a total of 62.8 mm of rainfall (54%) & [61%] of averages, least since 2019 ranking 16th lowest in Llansadwrn since 1928. The mean temperature 6.3C highest since 2020 and the 9th highest in January station records since 1979. Despite 8 sunless days, sunshine recorded at RAF Valley was 67.4h (141%) & [119%] of averages, highest since 2011 and 17th on the Anglesey record since 1931.

 

 

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February 2022

February 1 - the month began dull and damp in warm sector air. Pressure was high and steady on 1024 mb with Atlantic high 1041 mb W of Cap Finisterre while low 981 mb was over the Norwegian Sea with an associated weak cold front over the Isle of Man. Ex-storm Corrie had arrived over the Eastern Mediterranean. Strong winds persisted in the N Scotland with Altnaharra reporting a gust of 56 mph. The temperature at 0900 GMT was 9.4C and this rose to 11.2C at 1306 GMT in brief sunshine. The afternoon was mainly dull as frontal cloud moved across southwards [Rainfall 0.7 mm]. The 2nd began overcast with misty moderate to good visibility. There was rain in the N, but it was fine and sunny in the S and SE. Pressure 1024 mb was rising and the temperature, keeping mild for the time of year with no frosts, rose to 10.2C. Pressure was high 1032 mb over Spain and we were again in warm sector air with a warm front lying from the Western Isles to East Anglia [Minimum 7.6C, highest of the month]. Continuing mild on the 3rd with no frosts overnight and no snow in Eryri. Pressure 1012 mb was falling with high 1026 mb SE Europe and a cold front off NW Scotland, hinting at colder conditions. With the wind gusting to 35 mph there was a burst of rain 5.8 mm/h at 2225 GMT. The temperature fell from 9.3C to 1.6C by next morning.

Snow on the mountains viewed from Llansadwrn weather station.

It was back to wintry weather on the 4th with a light covering of snow on the Snowdonia Mountains above 1000 ft including Moel Eilio that had a good white cap. There had been a ground frost of -2.2C and marks of snow pellets were recorded by the hailometer. Precipitation measured at 0900 GMT for the past 24-h was 13.0 mm and the temperature 2.8C, dewpoint 2.2C, RH 96%. Pressure 1009 mb was rising the cold front had reached central England. There was a light WSW'ly wind and the sky was clearing. Fine and cooler day with a maximum of 7.3C at 1327 GMT. A sunny afternoon with solar radiation 6.38 MJ m -2 . On the 5th there was still snow on the Snowdonia Mountains lying at 2000 ft on the northern slopes of the Carneddau and Moel Eilio as low as 1000 ft. At 0900 GMT pressure 1015 mb was falling quickly the weather deteriorating having been bright 6/8th cloud cover at 0830 GMT. Low 973 mb SE Greenland had fronts lying to the NW we were in warm sector air with a warm front Western Isles and N Ireland. A very blustery morning, rain and poor to moderate visibility. Mace Head, Ireland, reported a gust of 58 mph S Uist 54 mph, Aberdaron 48 mph. It was fine and sunny in SE England. A rather wet day [7.7 mm] with a maximum of 9.1C. During the evening a cold front approached arriving here at midnight. Double flowered snowdrops in the Old Woodland at Gadlys.It was again a blustery morning on the 6th with an overcast sky and spots of rain in cooler air. Pressure 1002 mb was rising with Atlantic high 1035 mb W of Cap Finisterre. Low 962 mb was over the Norwegian Sea and the cold front had reached central England. Although breezy by 1030 GMT the sky was bright with the sun breaking through. The afternoon was sunny until late with the days now lengthening significantly, maximum 8.7C. The 7th was dull and damp with slight rain and drizzle affecting the western fringe. Deep lows 930 mb was SE Greenland and 982 mb Baltic. Pressure here was steady on 1024 mb. The rain on this wholly damp day only amounted to 0.7 mm, the maximum was 10.1C. Wet and windy again on the 8th the SW'ly force 5 strengthening. Low 948 was SE Greenland and there was a slow-moving cold front lying across the Isle of Man at 06 GMT. Mostly dull with slight rain and/ or drizzle. The maximum temperature was 10.3C at noon, thereafter it fell only slowly to 9.4C at midnight when the front eventually passed over. A maximum temperature of 12.8C was recorded by Gorddinog AWS and Gorwel Heights in Llanfairfechan and 13.6C was recorded at Bodelwyddan (Rhyl). There was light to moderate rain from 1900 GMT. Primrose in flower on our rockery bank Gadlys garden.Just after midnight on the 9th the rain eased and the wind moderated. Rainfall for the past 24-h measured at 0900 GMT was 15.8 mm, largest of the month. It was cooler the temperature 6.2C at 0830 GMT and brighter with sunny spells developing through the morning the temperature rising to 9.8C at 1312 GMT. Kew Gardens recorded a maximum of 14.6C. During the afternoon the temperature continued to fall in the cooler air. Overnight on the 10th the air temperature went down to 2.0C at 0411 GMT and there was a ground frost of -3.2C. The morning was fine with a cool WSW'ly breeze with spells of sunshine developing. There were snow showers in the N Scotland. Pressure 1023 mb was rising with Atlantic-high 1035 mb W of the Scilly Isles. Low 997 mb Cape Wrath at 06 GMT reached Wick by 0900 GMT. There was an occluded front lying over Malin Head and the North Channel, while yesterday's cold front had reached the English Channel. A sunny afternoon, Valley reported 5.4h of sunshine. A fair morning on the 11th after a heavy dew and moderate ground frost -4.1C, but no white was seen by 0900 GMT. The ground frost and air minimum 0.8C were both lowest of the month. Visibility was poor to moderate with the sun looming through thin cloud and mist. The temperature was 3.1C at 1130 GMT with 308 W m -2 solar radiation. Pressure here 1032 mb was rising, pressure was high 1034 mb over the Bay of Biscay with a ridge reaching N Scotland. A fine and sunny afternoon. Maximum temperature at Gadlys gardens 7.3C and Kew Gardens 10.6C. Overnight it was mostly cloudy and frost-free the air minimum 3.1C and 2.8C on the grass. The temperature at 0900 GMT on the 12th was 6.5C and there was a strong and blustery SW'ly wind. Capel Curig had reported a gust of 60 mph and Aberdaron 59 mph. The maximum here today was 9.3C and in Bodelwyddan 10.5C was reached. At Gorwel Heights in Llanfairfechan 11.1C was recorded at 1330 GMT with a gusting wind of 47 mph while Gorddinog reported 50 mph. Murlough reported 11.8C and Valentia, Ireland 11.9C. A wet day 10.2 mm in Llansadwrn, Capel Curig had (25.8 mm 21-21 GMT). On the 13th pressure 993 mb was falling quickly with frontal-wave low 990 mb Fastnet Rock tracking to Isle of Man 986 mb by noon. There was warm front over Anglesey with a triple-point over Cardigan Bay. Sunless day, wet and windy 7.8 mm recorded, but Whitechurch Pemps. had (28.6 mm). The maximum here was 9.9C, but Gorwel Heights in Llanfairfechan had 12.6C and Gorddinog AWS 12.4C, highest reported in the UK (Bude 12.3C and Gogerddan 11.4C). A little cooler on the 14th with wintry showers on the mountaintops of Snowdonia leaving a sprinkling of fresh snow by afternoon. Wet at first, but pressure 996 mb was rising and by afternoon there was some sunshine in a temperature of 8.4C, Gorwel Heights 7.2C. The 15th was much the same with an overcast sky. Pressure was steady on 1002 mb with a frontal-wave low over the North Channel associated with low 968 mb SE Greenland. Windy gusting 33 mph with Mumbles Head reporting 52 mph. Sunless, rainfall 5.3 mm...

The first 15 days were milder than usual the mean temperature 6.8C (+1.1) & [+1.2] of averages, the mean minima averaged 4.3C and was (+1.3) & [+1.5]. Rainfall was 69.1 mm (64%) & [76%] of the monthly mean total. There had been 9 days with ground frosts.

It was wet and windy on the 16th with storm Dudley. The Meto had issued a yellow warning for Wales and an amber warning for parts of N England and Scotland. Speed restrictions were in force on the Britannia Bridge early in the day. Storm Eunice heading our way with an amber warning already in force and indications were that it could undergo rapid cyclogenesis. Rare red warnings were subsequently issued for parts of S Wales and SW England bordering the Severn Estuary and N England and Scotland. A pretty rough morning on the 18th with pressure 979 mb falling quickly with low 974 (storm Eunice) near the Fastnet rock. Large hail 7 mm heavily marked the hailpad. Remarkable temperatures in the warm sector air overnight were enhanced in Llanfairfechan with Gorwel Heights recording 12.4C at 0252 GMT and Gorddinog AWS 12.3C at 0248 GMT. Here 9.9C was the highest at 0346 GMT. At 0720 GMT there was a shower of 7 mm hailstones and heavy rain just before 0900 GMT. Sferics at 0721z on 18 February 2022. Courtesy of blitzortung.org/.Thunderstorms developed locally at 0715 GMT with vivid lightning and some thunder, later at 1445 GMT we had sleet and snow showers. Storm Eunice resulted in gales and high wind gusts in southern Britain. A record 122 mph was recorded at The Needles, 88 mph at Mumbles Head, 84 mph at Aberdaron, 77 mph at Capel Curig, 67 mph at Valley, 65 mph at Mona, 50 mph in Llanfairfechan Gorddinog, 47 mph Gorwel Heights, and 41 mph in Llansadwrn. Three roofs of houses in Christchurch Road, Newport were blown off, the top of a church spire was blown off and several lorries overturned in places. Three persons died as a result of falling trees. Maximum 5.9C, lowest of the month, Rainfall 8.2 mm. On the 19th pressure reached 1009 mb at 0225 GMT then began falling again. With the wind backing SE'ly there was rain from 07 GMT turning heavy at 0849 GMT. At 0900 GMT with pressure on 1004 mb rain was heavy and visibility poor. Rainfall for the past 24h was 8.2 mm and continuing on saturated ground runoff from adjacent field caused flash flooding for the sixth time since September. There was water standing on the Cefni Marsh. It was cold enough on the Snowdonia Mountains for a little snow above 2500 ft before precipitation turned to rain. Winds were strong around coasts and mountains with gusts of 71 mph at Mumbles Head, 69 mph at Portland, 65 mph at Aberdaron, 57 mph at Capel Curig, 55 mph at Lake Vyrnwy. Snow was reported falling in Northern island and the Isle of Man. Snow had fallen in central Wales, including Llanidloes, and hills around Manchester, the M62 near Saddleworth. Pressure was lowest 999 mb over Anglesey at noon. [Rainfall 12.0 mm, maximum 9.6C] (Capel Curig 22.2 mm, Cardiff 11.7C, Aberdaron 1.1h). A wet and windy day on the 20th with gales in places and rough seas around the coasts. The WSW'ly wind was force 7 to 8 at times on the exposed side of the Gadlys shelter belts. Capel Curig recorded a gust of 80 mph, Bala 66 mph, Mona 52 mph and here 44 mph. Low 952 mb was S Iceland, we were in warm sector air with tight isobars. A cold front lay to the NW over Malin Head and the Western Isles of Scotland. The cold front arrived here about 14 GMT with the temperature falling 7C [Rain 7.5 mm Max 10.2C] (Lake Vyrnwy 70.4 mm, Shap 85 mm flooding in Wales, N England and River Severn). At midnight on the 21st low 953 mb was over NW Scotland, storm Franklin the third named storm in a week. Further gales and strong gusts across much of the UK. At 0750 GMT Valley reported a gale with a gust of 60 mph. Peak gusts during the day were 87 mph at The Needles, 80 mph Capel Curig, Aberdaron 72 mph, Crosby 71 mph, Lake Vyrnwy and Valley 69 mph, Manchester 61 mph, Mona 60 mph, Hawarden 58 mph. The wind here was WNW and although roaring in the tall trees in the shelter we recorded 41 mph. The day turned out dry and sunny with a maximum of 12.1C, highest of he month (Pershore 12.8C, Cardiff 11.9C Aberdaron 6.3h Valley 6.1h). Strong winds continued in the north after midnight on 22/2/22 with Macrihanish reporting a gust of 94 mph, S Uist 75 mph and Tiree 58 mph. By morning the wind here had moderated and after a heavy shower of rain on a cold front at 0830 GMT the sky was clearing. The afternoon was sunny, but breezy at times. At 2222 on 22/2/22 the temperature was 5.8C, I was hoping for 2.2! Much of Shrewsbury was underwater the result of the River Severn reaching near record levels bursting its banks in the town (Capel Curig 14.2 mm, Cardiff 13.3 mm and 8.6C) [Max 10.6C Rain 0.1 mm].

Very windy again on the 23rd with gales especially in the north. Pressure 1016 mb was falling rapidly between complex low 960 mb in the region of S Greenland and Iceland and high 1029 mb Spain we had a strong SW'ly flow There was extremely rough water in the N North Atlantic. The wind was gusting 42 mph with Mona reporting 47 mph and Valley 50 mph. S Uist reported 59 mph, Malin Head 52 mph, Aberdaron 57 mph and Capel Curig 66 mph. There was a shower of rain at 10 GMT, we saw little in the way of sunshine. A cold front passed over close to 2100 GMT with a burst of heavy rain (up to 19.4 mm/h), the temperature dropped and the wind moderated [Rain 7.9 mm, Max 9.5C] (Capel Curig 17.2 mm, Hawarden 11.8C). A quieter cooler day on the 24th with wintry showers and a little snow appearing on the mountains, briefly as low as 1000 ft, that have seen little this season. The wind was W'ly and we were more sheltered, exposed places reporting high gusts included Capel Curig 63 mph, Portland 60 mph, Aberdaron and Tiree 55 mph, Malin Head 49 mph and Mona 43 mph Maximum temperature today 6.8C (Trawsgoed 12.0 mm, Cardiff 8.3C, Aberdaron 6.4h). The 25th began with hardly a cloud in the sky and with the barometer on 1026 mb rising quickly to 1028 mb we had a fine sunny day. A light W'ly breeze and moderate misty visibility at first and hazy (milky) sunshine. There had been a ground frost (-3.2C) and an air minimum of 2.0C the temperature soon rising to 10.5C in bright sunshine 680 W m2 at 1226 GMT. At noon a ridge of high pressure covered the UK from high 1024 mb over Biscay (Milford Haven 12.2C, Aberporth 9.0h). Not a bad day on the 26th though starting mostly cloudy this cleared, but it was breezy the SW'ly force 5. Windier further north with Stornoway reporting a gust of 61 mph compared to Valley 31 mph and here 29 mph. At 0900 GMT pressure 1025 mb was falling with low 950 mb SE Greenland and high 1036 mb over the French and Belgian border. A cold front lay to the NW over Ireland and Scotland [Max 10.8C, Rain nil] (Gogerddan 11.7C, Aberdaron 7.0h, Valley 5.1h). The 27th was a brilliant day though a bit breezy. Beginning with hardly a cloud it was very fine, dry and sunny. Pressure was steady on 1020 mb . High 1040 mb was over the Baltic with deepening low 958 over the Atlantic just W of southern Ireland. This was expected to track north bringing attendant frontal bands our way tomorrow. In the afternoon several spectacular altocumulus lenticularis clouds developed in the vicinity of the weather station. Chinodoxa (The Glory of the Snows) and dwarf white rhododendron are in flower in the garden. Cluster flies are gathering in the Stevenson screen, tempted out of the house roof space by the sunny weather. Finished preparing an old raspberry bed for some new plants [Max 11.7C Grass min -2.7C] (Porthmadog 12.5C Valley 8.8h). As expected the 28th was not a nice day. Pressure was on 1017 mb, but there was a frontal band over the Irish Sea with low 960 mb S of Iceland while pressure was high 1039 mb over E Baltic states. The weather had been deteriorating since dawn, the SSW'ly freshening and visibility was poor in slight rain. The morning was wet with moderate rain at times. The afternoon saw moderate to heavy rain with the temperature falling away from 9.5C from 1300 GMT to 3.7C during the evening as the wind slowly moderated. Sunless [Rain 10.6 mm Max 9.7C Min 5.1C] (Whitechurch 31.6 mm Rhyl 10.9C].

The month ended with a total of 132.9 mm of rainfall (123%) & [147%] of averages, least since 2019 ranking 13th largest in February in Llansadwrn records back to 1928. The mean temperature 6.9C highest since 2019 and the 5th highest in station records since 1979. Sunshine recorded at RAF Valley was 76.1h (91%) & [97%] of averages, lowest since 2017 and ranking 43rd on the Anglesey record since 1931.

 

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March 2022

March 1 - the month began with a few of the old fashioned daffodils in flower in the garden in time for St. David's Day. There were plenty of the small narcissi in flower as well and of course there are leeks on the vegetable patch. It was a nice sunny day, at 0900 GMT cloud 6/8th was spilling over the tops of the Carneddau Mountains in an E'ly breeze. The fields were white with frost early the grass minimum reading -3.3C, there was just a little left. There was no air frost recorded. Pressure 1031 mb was rising with a high centred on Belfast 1030 mb, a frontal band was located over SE England and Brittany. The temperature rose to 8.6C and honeybees and a large bumblebee were seen on the heathers in flower on the rockery banks in the garden. (Aberdaron 8.8h Valley 7.7h Porthmadog 10.7C). In contrast the 2nd began overcast and wet remaining so all day. The ground was still saturated so there was some standing water about [Rain 3.9 mm] (Valley 11.1C, but sunless, Cardiff 11.4 mm, Scilly Is. 15.8 mm). Another wet day on the 3rd, overcast sky and calm at 0900 GMT with poor misty visibility. Not a great deal of rain here [1.0 mm], but sufficient for a little standing water on the saturated soil. Slight rain or drizzle most of the day. A glimpse of the sun in the west as it set under the cloud sheet (Llysdinam 16.6 mm, Cardiff 10.7C, no sunshine in Wales with Tibenham having 7.7h). Another calm morning at 0900 GMT on the 4th after an overnight ground frost of -2.5C the sky was becoming cloudier with moderate misty visibility. There was a slow-moving trough over eastern England, but with a ridge of high pressure to the west from Atlantic-high 1031 mb off Iberia pressure here 1023 mb was rising. Taking advantage of a dry day I planted a set of new raspberry canes along the prepared ridged bed [Max 8.3C] (Manston 13.1C Cardiff 12.0C Mona 6.0 mm Valley 3.5h). Cold enough on the 5th for a little snow to fall on the summits of the Snowdonia Mountains particularly on north-facing slopes, Yr Wyddfa and Garnedd Ugain looked quite white in the afternoon sunshine. Pressure 1030 mb was rising with high 1032 mb over Shannon and we had a sunny day. To the east frontal cloud associated with low 987 mb Norwegian Sea lay from the Norwegian coast over SE England to France (Usk 10.9C Trawsgoed -3.8C Valley 10.1h).

On the 6th, another fine sunny day with a chilly E'ly breeze. Pressure was steady on 1034 mb within a high centred over central Scotland. The day was cloudy in the south, but sunny in the north. The lawn grasses have been growing steadily (1.4 g dry mass m -2 d -1) through the winter and needed a trim, the standing biomass yield was 0.74 tonnes per hectare. So it was out with the mowers for the first time this year, that started after a bit of coaxing. Soil moisture 2-10 cm depth under grass was 52% dm, the top 2 cm had 97 % dm and the bare met plot 0-10 cm had 36% dm. In sheltered sunny parts of the heather covered rockery banks honeybees were out foraging (Porthmadog 11.3C Kinbrace -7.3C Valley 9.9h). Hardly a cloud in the sky on the morning of the 7th after a clear starlit night and what has now become a rare event, an air frost of -0.9C. The fields and newly trimmed lawns were covered with white frost (mostly dew) with a grass minimum of -4.7C. Sunny with a light ESE'ly breeze and an air temperature of 1.4C (dewpoint -0.5C) rising to 8.7C in the afternoon. Pressure 1027 mb was falling slowly with high 1030 mb over the North Sea. A warm front lay over mid-Atlantic to the north-west. Again we were lucky to have sunny weather in the north whereas in the south it was mostly cloudy. Dry enough in the afternoon to hoe off some weeds on the vegetable plot (Porthmadog 10.3C Mona min -5.1C Valley 9.7h). The 8th began cloudier with moderate to good rather hazy visibility. Pressure 1007 mb was falling quickly with a frontal-wave low 975 mb just off SW Ireland. There was a cold front over the Celtic Sea associated with low 964 mb S Iceland. No air frost, but there was a ground frost -3.0C. Hazy sunshine in the morning disappeared in the afternoon as cloud thickened enough for some non-wetting drizzle at times [Max 12.3C Rain trace] (Valley 4.6h). Continuing mild on the 10th with a slow-moving weakening frontal band over the Irish Sea. At 0900 GMT with pressure on 1011 mb the temperature was 11.5C which rose to 12.5C at 1030 GMT. Dry and pleasantly warm and sunny at first in a S'ly breeze before arrival of a cold front which spoiled things for the afternoon [Rain 0.5 mm] (Hawarden 12.6C Whitechurch 1.6 mm Valley 2.3h). Beginning dull on the 11th with rain in sight on the mountains. At 0900 GMT it was still fine, but soon the slight rain arrived. Pressure 997 mb was falling rapidly. Continued with slight rain and drizzle at times throughout. Snow was absent on the mountains [Max 11.6C Rain 9.4 mm] (Porthmadog 13.7C Libanus 17.8 mm Aberporth 0.4h).

A bright start on the 12th with just a few cumulus clouds over the mountains. Pressure 1002 mb was rising and two or three fair-weather clouds developed overhead. It was wintry again on the mountaintops of Snowdonia with a little snow fallen. Pressure was high 1035 mb SE Europe, but low 982 mb over the Celtic Sea deepened to 975 by noon with gales developing later [Max 11.1C Rain 0.2 mm] (Hawarden 13.1C Scolton 20.0 mm Valley 4.6h). A windy day on the 13th starting sunny with 3 oktas cloud cover over the Snowdonia Mountains with some fair-weather cumuli developing at 0920 GMT. Pressure was on 996.5 mb with low 980 mb Shannon with Malin Head reporting a gust of 58 mph, filling to 985 mb at noon. Force 7 at Valley gusting to 53 mph and 48 mph at Gorwel Heights. With the wind S'ly wind reaching gale force in SE Anglesey at times it was too windy to be outside near the tall trees [Max 11.5C Rain 0.5 mm] (Cardiff 12.3C Usk 12.6 mm Valley 6.7h). By the 14th the wind had moderated to force 4 SW'ly at 0900 GMT with the sky mostly clear of clouds. Pressure 1021 mb was rising with lows 1005 mb W Isles and 1003 mb Norwegian Sea losing their identity. West of deep low 931 mb S Greenland pressure was rising in a ridge from the Azores 1032 mb. Moderately sunny with a few clouds developing through the day [Max 10.0C Min 4.0C Grass 0.2C Rain 1.4 mm] (Cardiff 14.0C Capel Curig 7.4 mm Aberporth 10.7h Valley 4.3h). A little snow had fallen overnight on the mountains on the Carneddau, Yr Wyddfa and Garnedd Ugain mostly over 3000 ft. On the 15th the blue flowers of Chinodoxa in the garden (Glory of the Snows) was looking good and there was double drumming from woodpeckers in the woodland. During the day the grass field across the road S of the weather station was sprayed with herbicide. A lot of fields in the area are looking brown having been similarly treated in preparation for sowing spring cereals. More fields this year in the light of changing farming practice, Brexit and the Ukraine War. Herbicide treatment and more cereal growing is a fairly new thing hereabouts, gone are the days of semi-permanent pastures with a little barley grown [Max 12.0C Min 1.6C Grass -2.0C Rain 0.5 mm] (Rhyl 14.2C Gorddinog AWS 13.6C Gorwel 13.3C Aberdaron 9.9C Bala min -3.2C Capel Curig 0.8 mm St Athan 1.5h).

The first 15 days were close to the March mean temperature 7.1C [(+0.1)] of averages, Rainfall was only 20.3 mm (22%) & [26%] of the monthly mean total. While there had been 8 ground frosts there were no air frosts.

The 16th began calm and overcast with light to moderate rain through the morning turning to snow on the mountains later. There was little or no wind all day, frontal cloud and rain over the Irish Sea cleared eastward during the afternoon with some glimpses of sunshine later. A cold front passed over from 1650 GMT with the temperature falling from 7.9C to 1.9C by evening. Clear sky with a bright moon before cloud encroached again the temperature rising and WSW'ly wind strengthening [Max 7.9C Min 7.0C Rain 4.0 mm] (Hawarden 12.2C Capel Curig 7.8C Usk 7.0 mm Aberdaron 2.5h). A mostly cloudy morning on the 17th with precipitation in sight on the mountains at 0900 GMT in moderate to good visibility, there was a slight shower of rain at the weather station at 0920 GMT. pressure was steady on 1028 mb in a ridge to SW UK from Azores high 1035 mb. There were cold fronts over the North Sea, NW France and over the Atlantic to the NW associated with low 978 mb S Iceland. Pressure was high 1044 mb over the Gulf of Finland. Spits and spots of rain with glimpses of sunshine through the day with the sky clearing in the evening with a bright moon later [Max 11.4C Min 1.9C Grass -1.5C Rain 0.3 mm] (Cardiff 13.7C Sennybridge -2.3C Capel Curig 3.8 mm Aberdaron 5.8h). With the sky more or less clear overnight and early on the 18th the temperature at 0900 GMT was 7.8C with an air minimum of 6.3C there had been a touch of ground frost -0.6C with heavy dew. Pressure 1042 mb was rising and it was calm with good, but hazy visibility. It was a sunny day the temperature rising to 16.9C here and 16.6C at Gorwel Heights, Llanfairfechan. Bees were on the garden heathers, a peacock butterfly was spotted and buds were breaking on the damson tree and snowberry [Max 16.9C Min 3.4C Rain nil] (Gogerddan 17.0C Mona -0.8C Valley 11.2h). It was sunny almost everywhere on the 19th, not a cloud to be seen at 0900 GMT. Mild for March 13.1C after a frost-free night. Very fine, but very windy the E'ly force 5/6, very good visibility, but perhaps that will change as there is heavy dust over Europe from the Sahara desert [Max 16.0C Min 6.4C Rain nil] (Valley 18.0C and 11.3h).

It was great to hear the first chiffchaff of the season arrive at 0940 GMT on the 20th as I completed the morning's observations. Six days earlier than the median date of arrival here, equal earliest with 2012, and 10 days earlier than last year. Fritillaries are also coming into flower in the garden's damp meadow area and dwarf willow buds were breaking on the rockery. Fine, sunny and dry. The soil surface was dry this morning [Max 14.3C Min 3.4C Rain nil] (Porthmadog 14.9C Aberdaron 11.4h Valley 11.2h). Disappointingly overcast and dull on the 21st with good visibility and moderate pollution haze. The cloud was thick enough to produce some spots of dusty rain during the morning [Max 15.6C Min 3.0C Grass -1.2C Rain trace] (Gogerddan 17.3C Bala -3.1C Porthmadog 0.6 mm St Athan 3.8h). On the 22nd another dull morning, but the chiffchaff was singing. Visibility was moderate to good with moderate haze enhanced by Saharan dust a trace of which was detected. From noon it was brighter and in a 12 mph SE'ly Föhn breeze the temperature rose to 19.6C at 1507 GMT the highest of the month, the relative humidity falling to 50%. Gorwel Heights reached 19.8C [Max 19.6C Min 8.9C Rain nil] (Porthmadog 20.7C UK hi, Hawarden 2.6C Aberdaron 10.8h Valley 8.9h). Very fine and sunny on the 23rd with not a cloud in the sky at 0900 GMT. Pressure was on 1030 mb with high 1037 mb S Norway. There was a moderate amount of dust in the air over the UK, visibility here was good with a light haze [Max 18.1C Min 6.8C Rain nil] (Cardiff 18.8C Sennybridge -1.5C Aberdaron 11.2h Valley 10.9h). The 24th began overcast and calm with moderate visibility due to pollution 'smoke' haze. From noon there was a light E or NE'ly breeze and the sky cleared after 14 GMT [Max 17.8C Min 8.1C Rain nil] ( Usk 19.7C Sennybridge 1.7C Aberporth 9.6h). Fine and dry again on the morning of the 25th with moderate smoke haze persisting. Mostly cloudy at first, but breaks appearing with crepuscular rays. The afternoon was sunny and warm with bumblebees and honey bees on flowering plants and heathers in the garden. Small tortoiseshell, peacock and speckled wood butterflies were seen. Red squirrels were seen in the trees and feeding boxes, there are five or six different ones visiting at present distinguished by size and colour of their fur. Here the temperature reached 18.6C with 43% RH and 18.9C with 29% RH at Gorwel Heights while Gorddinog AWS recorded 19.6C with 32% RH [Max 18.6C Min 7.9C Rain nil] (Gogerddan 18.7C Sennybridge -1.6C St Athan 9.9h). On the 26th again little in the way of clouds with a light N'ly breeze. Haze was thick today with moderate visibility. There are flowers on plum and damson while buds on apple were breaking. The Gadlys 'old cricket field' was lightly ploughed today after previous herbicide treatment [Max 17.7C Min 7.7C Rain nil] (Porthmadog 20.5C Bala -1.7C Aberdaron 11.3h Valley 11.0h).

Very fine and sunny on the 27th with very good, but hazy visibility, there was an inversion looking across to the mountains. Pressure was steady on 1033 mb with high 1035 mb over the North Sea. No frosty overnight but there was moderate dew on the grass with a minimum of 1.5C. There were no clouds and the sea was calm at Rhosneigr where several were in enjoying the water [Max 17.7C Min 5.7C Rain nil] (Porthmadog 18.8C Bala 0.8C Aberdaron 12.0h). A mostly cloudy beginning to the 28th with pressure 1024 mb falling as a ridge from high 1031 mb N Adriatic to Scotland declining. Visibility was poor to moderate with thick haze enhanced by Saharan dust. The patch of cloud overhead soon began to clear and the rest of the day was sunny [Max 16.3C Min 8.9C Rain nil] (Scolton 17.7C Trawsgoed -1.2C Aberdaron 11.5h). Fog had formed overnight on the 29th and though reducing by 0900 GMT fog was moderate with the sky obscured. Pressure had fallen to 1011 mb the high having dissipated and a low 1016 mb was charted over the North Sea. A showery trough had formed over N England. Soon the sun was breaking through and the afternoon was mostly sunny. A cold front over S Scotland at midnight was moving towards N Wales [Max 15.2C Min 5.4C Pptn 2.0 mm] (Porthmadog 18.7C Capel Curig -0.4C St Athan 0.4 mm Valley 8.4h). The 30th began overcast with a burst of heavy rain at 0741 GMT. It was cooler and damp at 0900 GMT and snow had fallen in the north including Newcastle. Sunny spells and slight showers in the afternoon with snow pellets falling in the evening and snow on the Snowdonia Mountains. The first bluebells had appeared in the wood seven days before the median date of recent years. Cold fronts passed over N Wales at noon and 1800 GMT (Milford Haven 13.3C Trawsgoed 0.3 mm Cardiff 7.4 mm Valley 0.7h). In a return to winter there was snow at 1000 ft at Llyn Ogwen on the morning of the 31st and there was a shower of snow pellets and snow here at 06 GMT. Valley reported sleet showers between 0720- 0920 GMT. At 0900 GMT with 5 oktas cumulus cloud cover there was a brisk cold (3.8C) N'ly breeze. Snow was lying on the northern slopes of the Carneddau as low as 450 ft. The clean air from the north had cleared away atmospheric pollutants and dust and visibility was excellent, three fast jet from RAF Valley flew over at 0904 GMT heading SE. Sunny spells in the afternoon then a shower of large 1 cm conical snow pellets fell at 1820 GMT almost covering the ground and there were some snow flakes later [Max 7.2C lowest of month, Min 1.6C Grass -0.6C Pptn 1.0 mm] (Porthmadog 9.1C Trawsgoed -4.0C Bala 2.0 mm St Athan 11.1h Valley 7.6h).

The month ended with a total of 29.1 mm of rainfall (32%) & [37%] of averages, least since 1993 ranking 7th lowest in March in Llansadwrn records back to 1928. The mean temperature 8.7C highest since 2012 was equal highest in station records since 1979 ranking 2. Sunshine recorded at RAF Valley was 193.3h was most for 80-years and ranking 2nd on the Anglesey March record since 1931.

 

 

 
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April 2022

April 1 - began fine and cold with snow on the Snowdonia Mountains. Pressure 1023 mb was rising with high pressure 1028 mb Shannon, low 990 mb was over the Mediterranean. Cumulus clouds and a cumulonimbus were in the vicinity and the visibility was excellent, very clear. Sunny spells through the day with a cool N'ly breeze [Max 8.4C Min 2.4C Rain 3.4 mm] (Cardiff 10.1C Sennybridge -6.7C Llysdinam 1.2 mm Aberdaron 10.8h). . A cloudy calm morning on the 2nd and after earlier rain there was drizzle with poor visibility. By 1030 GMT it was brighter and the afternoon sunny [Max 9.9C Min 2.1C Grass -1.3C Pptn 0.1 mm] (Cardiff 10.8C Sennybridge -6.3C Rhyl 13.2 mm Aberporth 4.9h). A fine and sunny morning on the 3rd, but we still had the cool N'ly air and it was wintry on the mountaintops with a temperature of -3C. There was a white grass frost early with a ground frost of -3.4C and an air minimum of 0.3C. This had risen to 6.1C at 0900 GMT with pressure 1028 mb steady. High 1031 mb was SW of Ireland the high-pressure covering Ireland and Wales. There were a few well-developed cumulus clouds in the vicinity the day keeping mostly sunny and dry until late afternoon when cloud encroached associated with a warm front arriving at midnight [Max 11.1C Min 0.3C Rain 8.0 mm[ (Cardiff 11.7C Sennybridge -7.5C Aberdaron 9.0h). Mild overnight with rain that by 0900 GMT on the 4th had accumulated 8.0 mm. Pressure was steady on 1012 mb with high 1029 mb W of the Bay of Biscay with low 983 mb S Norway. We were in warm sector air the temperature at midnight 7.1C and at 0900 GMT it was 10.1C. Recent slight rain then drizzle had ceased, but it was dull and damp with the day sunless [Max 12.7C Min 6.1C Rain 2.8 mm]. The 5th was similarly dull with a minimum of 8.3C rising to 10.1C at 0900 GMT. Pressure was on 1010 mb, but low 986 mb S Iceland was deepened through the day and was 986 mb at 1800 GMT when a cold front over Shannon at noon had reached the Isle of Man. Some glimpses of sunshine and showers of rain in the afternoon with the WSW'ly wind strengthening during the evening as the cold front passed over Anglesey [Max 10.9C Min 8.3C Rain 3.4 mm] (Hawarden 14.2C Libanus 8.3C Capel Curig 11.2 mm Aberdaron 1.1h).

The 6th was dull and wet with a moderate SW'ly wind. Pressure 992 mb was falling quickly with low 975 off the Western Isles. A Meto yellow warning for wind had been issued for NE Anglesey, Coast and Cumbria, the wind strengthening through the day when in the evening gusts of 39 mph were recorded 41 mph at Aberdaron. At 1800 GMT the ,low was 968 mb reaching 970 mb over the North Channel at midnight. (Trawsgoed 13.3C Lake Vyrnwy 5.2C and 17.6 mm Aberdaron 5.9h) [Max 10.7C Min 7.7C Rain 1.8 mm]. Strong winds continued on the 7th gale force with strong gusts 54 mph at Valley reported at 0150 GMT with 45 mph here. Pressure dropped here to 979 mb at 0220 GMT on the 7th before starting to rise. There was a burst of heavy rain at 0522 GMT and pressure at 0900 GMT 985 mb was rising quickly the low having crossed S Scotland to the N Sea 970 mb . The Meto yellow warning was in operation and Aberdaron reported a gust of 58 mph. A blustery morning with temperatures somewhat below those expected for the time of year. At 1255 GMT there was a shower of snow pellets then sleet. Snow had fallen on the Snowdonia Mountains and was lying at 2500 ft (Cardiff 13.5C Lake Vyrnwy 3.3C Capel Curig 16.2 mm St Athan 8.4h) [Max 9.6C Min 5.7C Pptn 1.7 mm. Pressure 1001 mb was still rising on the 8th after a cold night with white frost on the grass early. Fine with sunny spells and cold 6.3C at 0900 GMT. There was a NNE'ly breeze and cumulus clouds were developing, a few were towering. Visibility was very good with clear Arctic air reaching here from the Barents Sea [Max 10.1C Min 0.5C Grass -3.6C Pptn 0.3 mm].

The first 15 days had rainfall of 30.8 mm (60%) & [47%] of the monthly mean averages. After a wintry start there had been 6 ground frosts there were no air frosts the lowest 0.1C. The mean temperature 8.5C was (-0.5] & [-0.7] of averages.

The 16th began fine and bright 6 oktas cloud cover with very good visibility and a temperature of 13.2C. Pressure was steady on 1028 mb with a high 1038 mb over S Norway. Low 985 mb was situated SE Greenland and remnant frontal cloud over the Irish Sea was burning off as a light SW'ly breeze picked up after 0930 GMT. The temperature rose to 17.9C in the middle of the afternoon, orange tip butterflies were seen (Cardiff 21.2C Bala 3.7C Nosig rain St Athan 9.0h) [Max 17.9C Min 9.0C Rain nil]. Another fine morning 6 oktas mainly cirrus clouds on the 17th with a light ENE'ly breeze developing after calm blackcap and chiffchaff were singing. Visibility was good with a slight smoke haze With pressure steady on 1020 mb frontal cloud was to the west over Ireland with a band of rain sliding northwards a little eventually reaching here early in the evening. Not before the temperature had risen to 19.7C, highest of the month (Gogerddan 19.7C Usk 3.8C Whitechurch 2.4 mm Aberdaron 5.9h) [Max 19.7C Min 8.6C Rain 0.4 mm]. A fine and dry though mostly cloudy morning on the 18th with light SW'ly wind. Bright with good visibility. Pressure 1017 mb was rising with low 998 mb between Scotland and Ireland moving to N Scotland by noon A cold front was over E Britain with a detached occluded front over the Celtic Sea. Sunny by afternoon (Usk 15.2C Libanus 3.4C Swyddfynnon 7.4 mm Aberdaron 11.4h) [Max 13.9C Min 7.1C Rain nil]. The 19th began with developing cumulus clouds and steady pressure 1020 mb. The air felt cool 9.8C at 0900 GMT, the cumuli did not pose a threat and the afternoon was sunny (Usk 16.1C Bala -0.8C Swyddffynnon 5.8 mm Valley 12.9h) [Max 12.8C Min 4.6C Grass 1.5C Rain nil]. The sky was clear of cloud on the 20th and visibility was very good, fine and sunny though still feeling cool in a light N'ly breeze. The Hubble telescope 32-years old today has brought us some amazing images of the galaxies. The new Webb telescope's instruments are still being set up and have been cooling down to a working temperature of 7 Kelvins by a 'gaseous helium cryocooler'.The large mirror made of beryllium coated with gold is still cooling to a working temperature, but has been successfully aligned and receiving sharp images. Visibility here on Earth in Anglesey deteriorated during the afternoon with atmospheric particulates increasing (Porthmadog 19.2C Bala -0.3C St Athan 1.0 mm Aberdaron 13.2h) [Max 17.3C Min 3.8C Grass 0.6 mm Rain nil]. Cloud was increasing on the morning of the 21st with good visibility, slightly hazy. Pressure 1014 mb was steady in a ridge from high 1031 mb over the Norwegian Sea. A low off SW Ireland had an associated rain-bearing frontal band. A cool ENE'ly breeze was picking up with some mostly weak sunshine. Dust from the Sahara was over the North Sea moving west and a trace of coloured dust was collected here at 0900 GMT (Porthmadog 19.9C Usk 3.1C Nosig Rain Aberdaron 10.5h Valley 2.5h) [Max 15.6C Min 8.0C Rain trace).

The 22nd began mostly cloudy with poor visibility in moderate haze. To the south there was a band of fairly low dark lenticular altocumulus clouds (below right). The 0600 GMT MetO chart showed a low 994 mb over Biscay off Cap Finisterre with highs 1038 mb Norwegian Sea and 1022 mb over the Black Sea this resulting in a flow of air from the east. Saharan dust collected at 0900 GMT at the weather station on 22 April 2022..I collected a moderate amount of light to dark reddish grey dust from the previously cleaned observing surface (left), which was a surprise as there Dark lenticular clouds south the weather station on 22 April 2022..had seemingly been no rain the gauges were dry. Although rainfall radar had indicated light patchy precipitation developing over parts of North Wales from 0645 GMT nothing wet reached the ground at the station. The recently commissioned DAVIS AirLink particulate monitor indicated moderate levels of particulates between 20-22 April (graphic below) highest around 06 GMT with 27 µg per m-3 up to 1µm (PM 1); 44 µg per m-3 1-2.5 µm (PM 2.5) ; and 62 µg per m-3 2.5-10 µm (PM 10). The Welsh Air Quality station at Brynteg 9.5 km to the north-west recorded a provisional maximum total of 250 µg per m-3 suspended particulates in the hour up to 04 GMT. SKIRON Graphic courtesy of the University of Athens.The AirLink sensor measures airborne particles by shining a laser through air, any particles present reflect the laser and the instrument determines their number and size. Pollutant particles in the air can be derived from vehicles, domestic fires and boilers, industrial and agricultural sources. Finer particles of Saharan dust, and volcanic dust, can also be detected. Backward trajectory analyses using the HYSPLIT air transport model on the NOAA ARL website indicated that parcels of air arriving over Llansadwrn between 3750 m and 4500 m above ground level (AGL) at 08 GMT today originated in north Africa. Backward trajectory analysis (HYSPLIT courtesy of NOAA ARL) plotted on terra satellite image (courtesy of NASA LANCE MODIS) of air parcels arriving over Llansadwrn on 22 April 2022.The graphic shows the trajectories plotted on NASA's LANCE MODIS terra satellite image. Satellite images showed dust raised over the Sahara on the 14th and 15th and particularly being blow off the coast in Libya over the Mediterranean. The 4000 m AGL trajectory of some 9.000 km began over Algeria and Tunisia on the 14th April then moved over Libya before crossing the Mediterranean Sea and Cyprus, reaching Turkey on the 18th, Ukraine, Russia just south-west of Moscow on the 20th, Belarus, Lithuania, and parts of Poland and Germany bordering the Baltic Sea, and The Netherlands before crossing the North Sea, northern England to reach Anglesey today (Hawarden 18.8C Whitechurch 4.1C no significant rain, Valley 3.4h Tiree 13.6h) [Max 16.4C Min 6.7C Grass 3.9C Rain nil].

The 23rd was a fine sunny day though somewhat breezy. Pressure was on 1009 mb with high 1034 mb over the Norwegian Sea and low 991 mb over Biscay. There was an easterly airflow. A drying wind the soil surface was dry with small cracks in the undisturbed met plot. Planted a row of potatoes and peas (Porthmadog 18.2C Sennybridge 3.3C Nosig rain Aberdaron 7.5h) [Max 15.7C Min 6.7C Grass 4.1C Rain nil]. Another sunny day on the 24th with pressure 1013 mb rising, there was a moderate to fresh NE'ly wind with strong winds across the the tops of the Pennines. Dry here, but there were showers in Cornwall (Whitechurch 19.2C Bala 3.2C Nosig rain Aberdaron 13.5 h) [Max 15.2C Min 7.3C Grass 3.6C Rain nil]. Hardly a cloud in the sky on the morning of the 25th with pressure 1018 mb still rising. Highs 1038 mb Greenland/ Iceland region and low 998 mb over the Atlantic off Cap Finisterre giving an easterly airflow, lighter breezes today, but cooler (Porthmadog 16.2C Hawarden 1.7C Nosig rain Valley 13.5h) [Max 12.6C Min 5.7C Grass 2.7C Rain nil]. Again on the 26th not much in the way of clouds at first, but cumuli were showing signs of development over mountains to the south. Pressure keeping high on 1023 mb in a ridge from high 1033 mb Norwegian Sea. The MetO charts showed we were surround by low pressure areas. Potted up seedling Tumbler and Tumbler Bella outdoor bush tomato plants into larger pots, the latter a new variety that has taken 15y to develop. Tumbler was badly affected by blight last summer for the first time, it's hope Bella will be more resistant. Very fine and sunny (Cardiff 17.5C Bala -0.6C Nosig Rain Aberdaron 13.6h Valley 8.9h) [Max 15.2C Min 4.9C Grass 1.9C Rain nil]. A bit cloudier on the morning of the 27th with 5 oktas cover of altocumulus, cumulus and cirrus clouds, but pressure 1029 mb was still rising. High pressure 1032 mb was centred near Wick, Scotland. Very fine with hazy sunshine. Strimming long grass (non meadow areas) was the gardening job for today, dismayed to see so much lesser celandine in flower that had increased from very rare to abundant even dominant in places in the garden and along roadsides hereabouts. It dies back early, but can smother short grasses and kill them off and compete with ivy as well. Trying to keep it out of the old woodland where bluebells are a feature (Porthmadog 15.6C Capel Curig 1.0C Nosig Rain Aberdaron 6.8h [Valley 7.8h]) [Max 13.1C Min 5.3C Grass 2.2C Rain nil]. pressure was high 1035 mb at 0900 GMT on the 28th across much of northern UK, here steady on 1034 mb. Cloudier mainly altostratus with moderate haze including Saharan dust, but none was deposited at ground level. A mostly grey, but dry day [Max 11.5C Min 3.8C Grass 1.5C Rain nil]. . Fine and sunny though the sky was covered with 6 oktas cirrus clouds with 1 okta of cumulus on the 29th. Visibility was moderate with haze (Porthmadog 15.9C Sennybridge -3.0C Nosig Rain St Athan 8.9h [Valley 11.7h]) [Max 13.8C Min 3.9C Grass 1.3C Rain nil]. A mostly cloudy morning on the 30th with moderate haze and some hazy sunshine at first (none bright). Pressure was on 1031 mb in Wales high 1032 mb, frontal bands associated with low 1013 mb were lying off NW Scotland with a warm front over NW Ireland. A change in the weather with a SW'ly instead of E'ly winds. Later in the afternoon there were spits and spots of rain with low 1014 mb off the Western Isles at 1800 GMT the warm front with rain then over the Irish Sea and western Scotland (Cardiff 17.0c Sennybridge -3.2C Valley 5.2 mm St Athan 5.4h) [Max 13.1C Min 5.1C Grass 2.6C Rain 5.0 mm]. ..

 

The month ended with a total of 36.2 mm of rainfall (71%) & [55%] of averages, most since 2019 ranking 20th lowest in April in Llansadwrn records back to 1928. The mean temperature 9.5C highest since 2020 ranked 16th in station records since 1979. Sunshine recorded at RAF Valley was 179.9h (provisional) was lowest since 2019 and ranking 24th on the Anglesey record since 1931.

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May 2022

 

May 1 - began on a rather dull note with slight to moderate rain. It was one of those days that Anglesey remained enveloped in low cloud all day with light rain and/ or drizzle. After the fine weather we have had it was unpleasant, but the garden needed the rain as it had become very dry and would save me watering. Sunless here, in contrast Llanfairfechan was dry with some sunshine (Hawarden 14.8C Sennybridge 5.1C Porthmadog 17.8 mm Aberporth 0.1h) [Max 10.7C Min 8.2C Rain 4.2 mm]. Overcast and dull on the 2nd with moderately high altostratus and cumulus clouds. Kept mostly dry with concrete drying by 10 GMT. Pressure steady on 1023 mb with high 1039 mb Azores and low 988 mb N Sweden. Brighter with a little sunshine later (Usk 16.3C Mona 4.1C Sennybridge 0.4 mm Aberdaron 2.1h Valley 0.0h) [Max 14.2C Min 6.3C Grass 4.0C Pptn trace]. There was fog at 0630 GMT on the 3rd visibility increasing, but still very poor at 0900 GMT. Overcast and calm at first, brightening later with glimpses of sunshine in the afternoon (Capel Curig 16.7C Bodelwyddan 7.5C Libanus 9.6 mm (wettest) Aberdaron 3.3h) [Max 15.9C Min 9.2C Rain 5.3 mm]. Again beginning overcast and dull on the 4th with moderate to good visibility the cloud sheet low on the mountaintops of Snowdonia. Pressure 1018 mb was rising with Atlantic-high 1026 mb W of Iberia having a ridge to SW Britain. An occluded front lay over the Irish Sea with low 995 mb Norwegian Sea. The cloud slowly lifted and there were some sunny spells in the afternoon (Usk 19.1C Libanus 5.8C Bodelwyddan 8.4 mm Aberdaron 8.8h (sunniest)) [Max 14.8C Min 10.5C Pptn trace]. Mostly cloudy on the morning of the 5th, but it was breaking with some weak hazy sunshine with some bright sunshine later. The bluebells in the wood are still looking good with some fading a little as the canopy closes over. Feeling warmer in warm sector air Atlantic-high 1028 mb off Cap Finisterre having a ridge to S Britain (Usk 20.6C Sennybridge 2.3C Nosig Pptn Bala 9.6h) [Max 17.8C Min 8.8C Rain nil].

Dull and breezy on the 6th, but visibility though hazy was good with pressure steady on 1024 mb. Bands of rain were affecting Ireland and Scotland slowly sliding eastward on a weakening cold front in high pressure 1029 mb centred over the Celtic Sea and 1026 mb NW Scotland. Slight showery rain arrived during the afternoon after a little sunshine (Usk 16.4C Libanus 5.8C Trawsgoed 9.2 mm Hawarden 1.9h Valley 0.2h) [Max 13.6C Min 10.6C rain 3.9 mm]. The 7th began much brighter with improving visibility. Pressure 1029 mb was rising again with sunny spells developing in the morning and a sunny afternoon (Usk 21.6C Sennybridge 4.1C Hawarden 0.8 mm Valley 11.2h) [Max 16.4C Min 8.9C Rain nil]. A fine sunny and warm day on the 8th (Cardiff 20.8C (highest) Whitechurch 5.4C and 0.21 mm Aberdaron 12.7h Valley 10.2h) [Max 20.2C Min 8.9C Rain nil]. The 9th began overcast with a moderate SW'ly wind. Pressure 1020 mb was falling with a complex Atlantic-low W983 mb of Scotland , pressure was high 1034 mb over the Baltic. Rain was brushing western parts of Anglesey, but here cloud was thin enough for some weak sunshine and occasional glimpses of bright sunshine. The afternoon was windy with showery rain from 15 GMT, heavy around 18 GMT, leading on to a blustery evening and night (Cardiff 21.5C Bala 4.3C Capel Curig 7.8 mm Hawarden 0.7h Valley 0.0h) [Max 15.3C Min 9.4C rain 9.2 mm]. A cold front had passed over Anglesey early on the 10th and the sky was clearing at 0900 GMT. Bright and breezy the SW'ly strengthening through the day that became mostly sunny (Hawarden 18.4C Libanus 8.6C Capel Curig 5.6 mm Valley 10.4h) [Max 15.7C Min 9.8C Rain 4.6 mm]. Windy overnight with pressure falling to 1005 mb at 0738 GMT on the 11th. The wind had moderated by 0900 GMT when it was mostly cloudy with the Snowdonia summits covered. The morning brightened being on the north-west edge of a band of moderate to heavy rain over Wales and SW England. Having the best of the weather the afternoon was dry with sunny spells (Usk 17.4C Lake Vyrnwy 7.9C Gogerddan 22.6 mm Valley 8.9h) [Max 164C Min 9.9C Rain nil]. A fine dry day on the 12th with good visibility. Pressure 1018 mb was rising with low-pressure 986 mb Iceland and Norwegian S and high-pressure 1025 mb over N Africa. There was a cold front over the Baltic and central France (Cardiff 16.9C Sennybridge 3.1C Cardiff 0.8 mm St Athan 9.6h) [Max 14.5C Min 6.9C Rain nil]. Fine and sunny on the 13th with a very gusty SW'ly wind (Hawarden 17.6C Tredegar 8.1C Cardiff 0.4 mm Aberdaron 12.1h Valley 11.9h) [Max 15.9C Min 10.1C Rain nil]. The fine and dry spell continuing on the 14th with pressure steady on 1021 mb. High-pressure 1023 mb over Belgium extended to southern Britain. A low SW of Iceland 992 mb had a warm front over N Scotland. A complex sky with cirrus, cumulus and altocumulus clouds of 5 oktas was clearing leading to a sunny warmer day with less wind than of late (Llysdinam 21.5C Usk 5.3C Nosig Pptn Hawarden 11.5h Valley 9.4h) [Max 17.7C Min 9.1C rain nil]. Very fine sunny and warm on the 15th with very good visibility. There were cumulus clouds around with showers in places; cumulonimbus were reported in S England and The Midlands. The temperature rose to 20.8C at 1249 GMT, highest of the month. Showery rain from 22 GMT, moderate to heavy 12 mm/h at 2334 GMT (Porthmadog 22.8C (highest) Capel Curig 7.5C Tredegar 11.2 mm Aberporth 7.0h [Max 20.8C Min 9.8C Rain 8.8 mm Valley 22.2 mm].

The first 15 days had rainfall of 36.0 mm (49%) & [55%] of the monthly mean averages. The mean temperature 12.6C was (+0.9] & [+0.8] of averages and it was frost-free.

The 16th began dull and damp, but the 14.4C at 0900 GMT felt warm. Visibility was moderate and misty. Pressure 1010 mb was rising with low 986 mb W of Ireland with frontal bands to the W and over the Celtic Sea. Pressure was high over the Med. The afternoon was bright at times with one or two glimpses of sunshine with a short sharp shower at 1625 GMT (Hawarden 22.3C Tredegar 11.2C Aberdaron 20.0 mm Hawarden 3.8h [Valley 2.3h]) [Max 18.4C Min 12.8C Rain 1.2 mm]. Continuing warm and dry, but dull on the 17th with moderate visibility. There was a SSE'ly breeze at 0900 GMT the temperature 16.0C risen from a minimum of 12.8C at 0327 GMT. Low 970 mb was W of Shannon with an occluded front over the Irish Sea and Biscay, pressure here was steady on 1014 mb. There was some sunshine around noon with pressure then falling reaching 1009 mb at 1611 GMT. There was rain from 1430 GMT turning heavy at 1625 GMT (up to 22 mm/h). Pressure rose during the evening reaching 1013 mb at midnight (Bodelwyddan 21.3C Lake Vyrnwy 8.7C Milford Haven 14.2 mm St Athan 4.5h) [Max 20.2C Min 12.8C Rain 7.7 mm]. A promising morning on the 18th with a covering of cirrus, contra and a few fair weather cumuli overhead. It was cooler, but fine and sunny with pressure 1017 mb still rising. There was a moderate breeze that strengthened during the evening with two dry cold troughs passing over at 18 GMT and midnight (Hawarden 20.6C Sennybridge 7.7C Tredegar 8.6 mm Valley 9.7h) [Max 18.2C Min 10.9C Rain 0.8 mm]. The 19th was cooler, but fine and sunny with the sky with cumulus and cirrus clouds clearing. Visibility was good. Soil moisture under grass measured today was 48.9% dry mass while on the undisturbed unvegetated met plot it was 26.0% dm (Hawarden 20.0C Mona 6.1C Scolton 0.4 mm Valley 10.1h) [Max 16.4C Min 8.3C Rain trace]. In contrast the 20th was overcast with the cloud low on the Snowdonia Mountains. It was breezy with a force 4 SSW'ly and there were a few spots of rain just before 0900 GMT. The sun broke through for a while around noon, but the afternoon was dull with strengthening wind and showers of rain, a heavy burst at 1446 GMT falling at a rate of up to 15.8 mm/h (Hawarden 19.4C Sennybridge 7.1C Capel Curig 5.4 mm St Athan 4.9h) [Max 16.4C Min 10.9C Rain 1.5 mm].

Pressure was steady on 1020 mb on Saturday the 21st with pressure high 1025 mb over N France, but low 1005 mb was west of Shannon. Fine, cool and breezy (SW'ly force 3) at 0900 GMT with bright or sunny spells developing. We had the family including children here in the garden for a rare visit, due to Covid rules, keeping seniors safe. At 3 pm we were unfortunately sprayed by the local farmer when he was spraying an adjacent field of cereals imparting a chemical smell and the making our eyes smart. We were given no warning of this and the wind speed was 20 km/ h force 4 off the field onto our house and garden above the advised wind speed for crop spraying... (Cardiff 19.0C Hawarden 6.1C Nosig Capel Curig 0.2 mm Bala 7.0H Valley 6.5h) [Max 16.3 C Min 8.5C Rain 0.4 mm]. Overcast skies and very poor visibility on the morning of the 22nd with slight rain and drizzle. Dull and wet here most of the day while it was fine and sunny in SE England and Newcastle. It cleared up a little about 14 GMT when brighter with glimpses of sunshine (Cardiff 21.8C Tredegar 7.2C Capel Curig 12.0 mm Valley 4.5h) [Max 14.6C Min 12.1C Rain 3.2 mm]. Another dull morning on the 23rd with a light WNW'ly wind. Pressure 1003 mb continued to fall with low 995 mb over the Norwegian Sea and low 1002 mb over Belgium. There was an occlusion over S central Britain. At 0900 GMT rain was in sight and we had a little within 10 minutes. Further sprinkles during the morning then it cleared up fine in the afternoon (Cardiff 16.2C Libanus 7.8C Trawsgoed 3.6 mm Aberdaron 3.8h) [Max 15.4C Min 10.3C rain 0.2 mm]. On the 24th pressure 1006 mb was rising with a force 3 WSW'ly breeze. Dull all morning with sprinkles of rain then brighter with sunny spells in the afternoon (Usk 17.2C Lake Vyrnwy 6.3C Libanus 2.6 mm St Athan 10.0h) Max 15.6C Min 8.6C Rain 1.8 mm].

A misty morning on the 25th began dull and breezy. Pressure 1007 mb was rising with low 987 mb SW Ireland. An upper level trough of cooler air from the Arctic over Scotland was reaching southwards to Spain. The sun broke through by the afternoon (Hawarden 18.0C Tredegar 6.3C Capel Curig 13.2 mm Valley 8.2h) [Max 16.6C Min 10.4C Grass 8.5C Pptn 0.1 mm]. Another dull and misty morning on the 26th with drizzle on the wind at 0900 GMT. There was a complex of lows 990 mb to the N, but pressure here 1017 mb was rising with high-pressure to the south. A cloud mass was over the UK in warm sector air. Stornoway reported small hail showers with heavy marine showers over the Atlantic to the west. The morning continued damp before showers and sunny spells arrived for the afternoon (heaviest 6.6 mm/h at 1249 GMT) (Hawarden 18.9C Sennybridge 8.5C .Lake Vyrnwy 6.8 mm Valley 4.6h) [Max 15.9C Min 10.2C Grass 6.2C Pptn 2.8 mm]. A brighter morning on the 27th after a cooler night air minimum 6.9C Grass 2.2C with heavy dew. Pressure 1027 mb still rising with high 1030 mb over the Celtic Sea. Fine with sunny spells and feeling warmer in the WSW'ly breeze. At Tywyn Aberffraw saw early purple and twayblade orchids in flower (Cardiff 20.1C Scolton CP 5.9C Cardiff 1.8 mm St Athan 14.3h) [Max 16.2C Min 6.9C Grass 2.2C Rain nil]. Fine and sunny with a cool N'ly breeze on the 28th with pressure on 1029 mb with high 1031 mb lying between Scotland and Iceland (Mumbles Head 19.7C Swyddffynnon 1.4C Nosig Pptn St Athan 13.5h Valley 12.9h) [Max 15.6C Min 11.2C Grass 4.8C Pptn trace]..

Overnight on the 29th the sky was clear with no moon with bright stars shining (Anglesey Dark Skies). Thick low level fog had formed by 0645 GMT with the sky still clear. The minimum was 6.0C, lowest of the month, Cloud then formed and there was a slight shower of rain just before 0900 GMT in poor visibility. Pressure was on 1022 mb with the high 1032 mb now between Iceland and Scotland a ridge over Britain in decline. The cooler day turned sunny by afternoon. The electricity flashed off early in the afternoon, no thunder was heard, but near Llanbedr in Gwynedd 3 Welsh Black Cattle were killed by lightning, others animals sheltering under the same tree escaped this fate (Scolton CP 16.8C Sennybridge 1.2C (lowest) Swyddffynnon 7.6 mm (most) Aberdaron 14.1h (most) Valley 11.8h) [Max 14.4C Min 6.0C Rain 2.6 mm]. A mostly cloudy day on the 30th beginning with showery rain. Cool the temperature at 0900 GMT 9.4C with the grass minimum down overnight to 4.5C. Pressure 1013 mb was falling with a detached occlusion over the North Channel with lows 1008 mb N Sea and 995 mb over the Atlantic W of Iberia. Mostly dull, little in the way of sunshine and the maximum 11.6C was the second lowest of the month (Cardiff 17.7C (highest) Bala 1.9C Swyddffynnon 5.6 mm St Athan 6.8h Valley 0.6h) [Max 11.6C Min 6.1C Grass 4.5C Rain 5.2 mm]. The 31st began showery one falling at 27 m/h at 0550 GMT. At 0900 GMT there were towering cumuli in the vicinity and cumulonimbus were reported, visibility was moderate with mist. Variable winds mostly cloudy around noon, but sunny spells before and after (Cardiff 17.9C Libanus 4.1C Bala 8.4 mm St Athan 10.7h Valley 6.0h) [Max 1.8C Min 7.2C rain 3.0 mm].

 

The month ended with a total of 66.5 mm of rainfall (91%) & [98%] of averages, most since 2020 ranking 39 in Llansadwrn records back to 1928. The mean temperature 12.7C highest since 2020 ranked 8th in station records since 1979. A sunny month with 187.3h (provisional)sunshine recorded at RAF Valley (84%) &[93%] of averages.

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June 2022

June 1 - after a calm night it was a fine and sunny morning with a light NE'ly breeze picking up. There were cumulus clouds over the mountains particularly central Snowdonia and the west. Pressure 1018 mb was rising with a high 1022 mb W of Ireland. It was a sunny afternoon and I planted out a row of peas on the vegetable plot raised in small pots in the greenhouse frame (wood mice excluded) as the first row had mostly appeared eaten by leaf cutting insects, slugs and/ or and mice. Usually the plants can grow sufficiently fast to be unaffected, but this year not so. Hoping that the larger pot grown plants (50 x 3¨ pots with 3 seeds) will survive the onslaught. This is economical with seed as a sown row would have twice the number of seeds sown with less success. Sowed a batch of runner beans in the greenhouse in the mouse secure frame, same story (Cardiff 18.9C Libanus 6.5C Rhyl 10.0 mm Aberdaron 13.8h) [Max 16.8C Min 8.7C Rain nil]. On the morning of the 2nd at 0900 GMT it was feeling pleasant in the sunshine. I have seen song thrushes about the garden, more evident today with some fledglings seen, they are usually successful here. It was dry here although valley reported rain earlier (Cardiff 21.1C Bala 1.6C Rhyl 2.6 mm St Athan 13.8h) [Max 17.6 Min 7.2C Rain 1.2 mm]. There was a patch of blue sky 'enough to patch a sailor's trousers' over the weather station on the 3rd at 0900 GMT. Visibility had improved a little, was poor now a misty good, in slight rain. Pressure was steady on 1019 mb with high 1026 mb between Iceland and Scotland with a disturbance in upper layers of air and thundery lows 1012 mb over Biscay and 1007 mb Iberian coast. By 1030 GMT it was brighter with glimpses of sunshine and more blue sky and humid. Sferics at 1440z on 3 June 2022. Courtesy of blitzortung.org/.Thunder was heard at 1435 GMT and rumbling for about 15 minutes, a look at the sferics chart showed that activity to the south with quite a storm developed over Cardigan Bay. There had been no MetO warning, but a yellow was soon issued. Several hours of thunder and lightning ensued in the area of Cricceith and Porthmadog Cells did not advance along the Menai Strait on this occasion. Hail and torrential rain with 1 ft of flash flooding was reported in Criccieth where several properties were affected. Porthmadog reported (16.4 mm) of rain (Usk 23.1C Sennybridge 5.7C Porthmadog 16.4 mm St Athan 10.5h) [Max 15.7C Min 10.3C Rain 0.4 mm]. A fine and bright morning on the 4th with a moderate ENE'ly breeze. Pressure had risen and was steady on 1024 mb with high 1028 mb over the Tay estuary. There was a thundery low 1014 mb over Brittany, France and there were showers in SW and S England. Sunny at first clouding over by afternoon with showery rain (Hawarden 19.3C and min 7.2C Cardingham 25.8 mm Milford Haven 13.2 mm Valley 6.0h Tiree 16.2h). A wet day on the 5th began overcast with moderate rain falling at 0900 GMT. Pressure was on 1019 mb with high 1025 mb over the North Sea near Wick and a thundery low 1015 mb over the Celtic Sea. A Meto yellow warning had been issued for southern Britain, there were storms developed over France and Austria. In the Armagnac region of Tuscany in France golf ball sized hailstones destroyed many vines. Slight rain or drizzle most of the dark and sunless day with highest light level only 200 W m -2 at 1135 GMT(Trawsgoed 13.9C Lake Vyrnwy 6.9C Libanus 23.6 mm Valley 0.0h) [Max 11.3C Min 9.4C Rain 3.7 mm].

It was fine, but a mostly dull day on the 6th starting with overcast skies and a few low cumulus clouds in the west. Pressure was on 1015 mb with low 1004 mb S North Sea while pressure was high 1020 mb over France, A little sunshine in the afternoon (Tindrum 22.0C Cardiff 21.3C Lake Vyrnwy 8.1C St Athan 3.4 mm & 2.2h) [Max 15.7C Min 9.5C Rain nil]. Fine and sunny on the 7th with good visibility. Pressure was on 1016 mb with high 1021 Norwegian Sea and low SE North Sea. Rain fell just before midnight. Ex-tropical storm Alex was over the Atlantic heading our way (Hawarden 21.6C Swyddffynnon 3.5C Capel Curig 2.0 mm Valley 9.0h) [Max 20.0C Min 9.6C rain 3.6 mm]. A damp morning on the 8th after overnight rain. Pressure 1002 mb was rising with a low 993 mb just off NW Ireland and 983 mb S Greenland. Sunny spells and the odd light shower of rain in the afternoon (Hawarden 19.3C Lake Vyrnwy 10.8C Capel Curig 11.4 mm Aberdaron / Valley 10.2h (highest)) [Max 16.5C Min 12.4C Rain 0.3 mm]. Showers of rain early on the 9th and dull and breezy, poor visibility. Pressure was on 1013 mb with low 977 mb W of Ireland, the jetstream was strong over SW UK with ex-tropical storm Alex. Some sunshine, but strong gusty SW'ly wind (Gogerddan 19.3C Bala 6.7C Whitechurch 5.4 mm (highest) Valley 4.8h) [Max 17.3C Min 9.8C Rain 0.1 mm]. Strong gusty SW'ly winds continued on the 10th with rain insight at 0900 GMT. We were in a plume of warm air from N Africa the temperature 15.8C dewpoint 12.9C. Cumulus clouds were increasing when 6 oktas cover, sunny spells with strong gusts of wind 39 mph too risky to be in the garden near the tall trees (Hawarden 21.1C Llysdinam 10.4C Lake Vyrnwy 1.0 mm Aberdaron 14.2h) [Max 16.8C Min 12.2C Rain nil].

Strong and gusty SW'ly wind again on the 11th with pressure 1017 mb rising. Low 982 mb was between Scotland and Iceland with an occluded front lying over Wales and N England. Bright with glimpses of sunshine the wind moderating late in the afternoon (Heathrow 23.8C Cardiff 19.8C Lake Vyrnwy 10.2C Libanus 3.8 mm St Athan 11.9h Valley 7.6h) [Max 16.8C Min 12.2C Rain nil]. By the 12th pressure had risen to 1024 mb with low ex-Alex mid Norwegian Sea. There was a ridge of high-pressure to the Celtic Sea from high 1033 mb N of Azores. Feeling warm, but breezy, some sunny spell cloudier by late afternoon with a slight shower of rain in the evening (Cardiff 19.3C Lake Vyrnwy 9.2C Whitechurch 0.2 mm St Athan 12.9h) [Max 16.6C Min 10.0C Rain trace]....

The first 15 days had rainfall of only 13.9 mm (17%) & [19%] of the monthly total averages. On the cool side the mean temperature 13.5C was (-1.0] & [-0.6] of averages with the highest maximum 20.0C on the 7th.

The 16th turned warmer and it was very fine the temperature at 0900 GMT 18.7C. High 1023 mb was over Brittany, pressure here 1020 mb had fallen a little there was a frontal cloud to the W and NW with a frontal-wave off Malin head. In the afternoon the temperature rose to 23.0C with Gorddinog AWS reporting 22.9C (Kew Gardens 28.2C Cardiff 23.4C Bala 2.9C St Athan 11.9h Valley 10.5h) [Max 23.0C Min 9.9C Rain nil]. The 17th began very fine and sunny, but very windy the SW'ly force 5/6 (Capel Curig gusting 44 mph). Pressure was on 1016 mb with high 1025 mb Germany while low 989 mb SE Iceland had associated frontal cloud over the Western Isles and Ireland. Warm, the temperature at 0900 GMT was 21.1C RH 60%. The afternoon turned cloudy with light rain from 16 GMT of 7-h duration. At Gorwel Heights, Llanfairfechan the temperature reached 26.0C while at Gorddinog 25.2C was reached, both highest of the month (Santon Downham 32.7C Cardiff 28.6C Llysdinam 9.3C Porthmadog 1.8 mm Lake Vyrnwy 13.2h Valley 5.6h) [Max 21.4C Min 14.8C Rain 2.4 mm Gorwel 4.6 mm]. A fresher morning on the 18th at 14.2C, fine and sunny at first then turned cloudier. Pressure was on 1022 mb with low 984 mb Norwegian Sea and associated cold front stretching from the Baltic to the Severn estuary (Cardiff 16.2C Lake Vyrnwy 10.2C Swyddffynnon 3.4 mm Valley 6.0h) [Max 15.3C Min 10.6C Rain nil]. Mostly cloudy on the 19th with a still fresher feel in a light N'ly breeze. The overnight air minimum of 6.6C and grass minimum of 3.5C were lowest of the month. Some sparrows had fledged, from the penthouse in the eaves of the house, and were being fed by parents on the birdtable. They were not around for long, no doubt going on their summer around the hedgerows of Llansadwrn. A blackcap was singing in another part of the garden. Dull and cool turning sunnier by afternoon. Pressure was on 1018 mb with low 1001 mb off S Norway having an occluded front over the N Irish Sea. With remnants of a cold front over the English Channel and a thundery low 1005 mb Biscay thunderstorms developed in NW France (Cardiff 17.7C Sennybridge 1.7C (lowest) Cardiff 0.4 mm Aberdaron 9.0h) [Max 16.6C Min 6.6C Grass 3.5C Rain nil].

A sunny morning on the 20th with 4 oktas of cirrus and cumulus clouds and good, but hazy visibility. Saharan dust was in the air and a sample of coloured dust was collected at 0900 GMT. The sky mostly cleared of cloud and 15.3h of sunshine was recorded at Aberdaron and 15.0h at Valley (Aboyne 24.7C (highest) Bala 21.5C Trawsgoed 4.6C Porthmadog 2.8 mm Aberdaron 15.3h). Very fine and sunny on the 21st and feeling warmer with 18.0C at 0900 GMT. Pressure was on 1015 mb in a slack area of pressure with high 1017 mb Netherlands. Rain to the NW including just across the Irish Sea in Dublin kept away (Leconfield 26.6C (highest) Cardiff 24.7C Whitechurch 4.9C St Athan 1.0 mm and 14.8h) [Max 21.7C Min 10.2C Rain nil]. At 04 GMT on the 22nd radiation fog had formed, this soon cleared and by 0900 GMT visibility was very good with hardly a cloud in the sky. Pressure was 1016 mb in a ridge to the Irish Sea from high 1036 mb N of the Azores. By 0945 GMT a line of cumulus clouds had formed over the Snowdonia Mountains and frontal cloud could just be seen to the NW of Anglesey. A dry sunny day here (Cardiff 27.3C Bala 6.3C Aberdaron 15.3h) [Max 22.3C Min 11.6C rain nil]. The 23rd began cloudless with very good visibility. Fine sunny and warm, the maximum of 24.8C was highest of the month (Hawarden 28.2C (highest) Capel Curig 6,6C Bodelwyddan 8.2 mm Valley 14.2h) [Max 24.8C Min 12.6C Rain 0.1 mm]. In contrast the 24th began mostly cloudy, fine, but dull moderate hazy visibility. Pressure 1001 mb was falling with developing frontal wave low 996 mb Shannon. There was rain in the west and south-west Britain, we had slight rain or drizzle at times in the afternoon then rain later (Hawarden 21.1C Sennybridge 10.3C Milford Haven 8.6 mm Hawarden 2.7h Valley 0.0h) [Max 17.5C Min 13.5C Rain 1.7 mm]...

 

 

The month ended with a total of 47.2 mm of rainfall (59%) & [64%] of averages, most since 2020 ranking 27 in Llansadwrn records back to 1928. The mean temperature 14.3C lowest since 2019 ranked 20th in station records since 1979. A sunny month with 237.1h (provisional) sunshine recorded at RAF Valley (115%) &[126%] of averages.

 


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July 2022

July 1 - began mostly cloudy with an early glimpse of sunshine before spits and spots of rain during the morning. Pressure was steady on 1014 mb with a high 1022 mb Charente Maritime. Atlantic-low 1002 mb was S of Iceland and W of Scotland. It was brighter with a little more sunshine by noon and early afternoon (Bodelwyddan 19.4C Sennybridge 7.1C Capel Curig 14.2 mm St Athan 7.3h) [Max 17.4C Min 11.9C Rain 10.2 mm]. With pressure 1015 mb rising it was fine and breezy on the 2nd with cumulus clouds towering in the vicinity. The afternoon was sunny and warm (Hawarden 20.5C Lake Vyrnwy 10.1C Capel Curig 12.4 mm Valley 12.2h) [Max 17.6C Min 11.7C Rain 1.5 mm]. . It was dull and damp on the morning of the 3rd with a light WSW'ly breeze and good visibility. Pressure 1020 mb was still rising with high 1033 mb N of Azores, but low 990 mb Norwegian Sea had associated an associated trough with frontal bands over the Irish Sea. Particulate air concentrations were very low (AQI of 1.0). Bright with sunny spells later in the afternoon (Cardiff 20.3C Libanus 7.7C Whitechurch 2.4 mm Aberdaron 9.0h) [Max 17.8C Min 11.6C Rain nil]. A mostly cloudy morning again on the 4th with good visibility. Pressure was steady on 1022 mb with high 1031 mb N of Azores and low 995 mb Norwegian Sea. The cloud was due to a detached weak cold front over the Irish Sea (Usk 20.3C Libanus 6.2C NSR Aberdaron 7.6h) [Max 17.7C Min 12.0C Rain 1.4 mm]... ¤

A fine, dull morning on the 15th with a WSW'ly breeze picking up. The day kept dry with some sunny spells (Heathrow 27.2C Cardiff 24.2C Sennybridge 5.7C NSR St Athan 12.5h) [Maximum 19.7C Min 11.9C Pptn tr].

The 16th was very fine and sunny with cirrus and some cumulus clouds over the mountains to the S increasing. Pressure was steady on 1026 mb with high 1027 mb Netherlands. A mostly sunny and warm day (Heathrow 29.1C Usk 26.9C Sennybridge 5.6C NSR Aberdaron 13.2C Valley 12.9h) [Max 23.6C Min 10.8C Rain nil]. The 17th began with broken cloud altocumulus cirrus and cirrostratus clouds. There were waves seen in the cirrus overhead the station. Visibility was very good and it was very warm 22.7C in the sunshine. There were shower further north near Newcastle and light rain in Scotland. Pressure was on 1023 mb with high 1028 Belgium. Low 998 mb Iceland had an associated cold front over NW Scotland. There was an Atlantic low 1012 mb off Iberia. The temperature in the afternoon rose to 28.7C with RH down to 38% (Hawarden 33.0C Gorwel Heights 31.1C Aberdaron 25.0C Sennybridge 10.8C NSR St Athan 12.3h Valley 9.1h) [Max 28.7C Min 15.1C Pptn nil]. After an overnight minimum of 17.2C the 18th began very warm with a temperature of 26.6C at 0900 GMT. Sunny with 4 oktas of cirrus clouds and contra with very good visibility. Pressure was on 1018 mb with high 1023 mb SE Europe and a low 1013 mb over the Atlantic off Iberia. The afternoon was hot with 33.0C recorded at this station, Bodelwyddan and Crosby. Valley reported 32.3C, Mona 32.9C, Capel Curig 31.3C. Bala had 34.9C, Trawsgoed 35.1C, Gorwel Heights 35.3C and Hawarden a record 37.1C (Santon Downham 38.1C Hawarden 37.1C Wales record Sennybridge 9.3C NSR Lake Vyrnwy 13.0h Valley 9.8h) [Max 33.0C Min 17.1C Rain nil]. The 19th was extremely hot over most of southern Britain and Europe. Overnight the air minimum temperature did not fall below 21.2C the highest minimum recorded at this station since records began in 1979. At 0900 GMT the temperature was 30.4C and rose to 33.3C. The heat was intense in Llanfairfechan with 37.0C recorded at Gorwel and Gorddinog a record for both stations. Forty degrees Celsius was recorded for the first time at several places in England, Coningsby had 40.3C. Wildfires broke out in the Dartford area and London and several properties were destroyed. In contrast thunderstorms developed over the Celtic Sea and moved north across Pembrokeshire, Cardigan Bay and part of Llyn. The maximum at Mumbles Head was just 26.7C and Aberdaron 28.2C. Lake Vyrnwy recorded 29.3C, Valley 31.9C, Capel Curig 32.1C, Bala 32.3C Mona 32.7C, Llansadwrn 33.3C, Bodelwyddan 34.1C (Congingsby 40.3C Llanfairfechan 37.0C Hawarden 36.2C Usk 14.1C Milford Haven 22.0 mm Bala 7.8h Valley 6.7C) [Max 33.3C Min 21.2C Rain nil]...

The month ended with a total of 32.3 mm of rainfall (37%) & [42%] of averages, lowest since 2006 ranking 11 in Llansadwrn records back to 1928. The mean temperature 17.1C lowest since 2020 ranked 8th highest in station records since 1979. A sunny month with 198.8h (provisional) sunshine recorded at RAF Valley (98%) &[113%] of averages.

 

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August 2022

August 1 - a fine, warm and breezy morning with good visibility and 6 oktas of cumulus clouds. Pressure was steady on 1019 mb with complex low 1007 mb over the Baltic. Low 993 mb SE Greenland had associated frontal masses W of Ireland. We had a heavy shower at 1800 GMT that fell at a rate up to 26 mm/h. There was further heavy rain during the evening resulting in the wettest day of the year so far with 37.0 mm measured at 0900 GMT tomorrow. Wettest day since 30th December 2021 when 44.5 mm fell (Cardiff 24.9C Bala 7.7C Porthmadog 12.4 mm St Athan 7.2h) [Max 20.4C Min 11.9C Grass 8.3C Rain 37.0 mm] [Capel Curig 48.8 mm Mona 22.0 mm Bodelwyddan 12.8 mm]. There was thick fog at 0740 GMT and it was still foggy at 0900 GMT on the 2nd with the sky obscured so it got a rare 9 in my records. Very wet overnight with heavy rain at 0300 GMT falling at 50 mm/h and wind at 26 mph. Flood alerts had been issued for the Conwy Valley and areas near Porthmadog. Pressure was on 1010 mb with a complex low 991 mb NW Scotland and a mass of cloud cover the Irish Sea associated with cold fronts. Winds were strong in NW Wales gusting to 49 mb at Aberdaron. A sunless day, but rain had eased. With the warm wet weather there was danger of blight, the Irish Weather Service had a blight warning issued for coastal area including Pembrokeshire. There was a little blight on my outside growing Tumbler tomatoes, but not on a new variety called Tumbling Bella. Last year I lost all the Tumblers due to blight so pleased to see Bella is resistant.. There was flash flooding reported in Llanwrst where the River Conwy had burst its banks (Hawarden 24.5C Lake Vyrnwy 15.4C Capel Curig 57.6 mm Hawarden 5.8h Valley nil) [Max 18.2C Min 16.3C Rain 1.2 mm]. A brighter day on the 3rd with convective clouds developed over the mountains of Snowdonia. A cumulonimbus was spotted earlier, at 0900 GMT 5 oktas of cumulus clouds with sunny spells developing during the morning. Pressure 1010 mb was rising with low 995 mb N of Scotland while pressure was high 1023 mb Azores. Fine and breezy becoming warm in sunshine, a slight shower of rain in the evening (Monkswood 29.5C Usk 24.1C Lake Vyrnwy 13.8C Capel Curig 6.8 mm Aberdaron 11.6h Valley 5.8h) [Max 20.9C Min 14.6C Rain 0.1 mm]. A mostly cloudy morning on the 4th with spots of rain at 0900 GMT with rain over the Snowdonia Mountains. Pressure 1017 mb was rising in a ridge from Atlantic-high 1031 mb off SW Ireland. Yesterday's cold front was now over the Baltic, France and N Spain. Sunny by the afternoon (Cardiff 22.6C Lake Vyrnwy 9.9C Bala 3.3 mm St Athan 10.3h Valley 8.8h) [Max 19.6C Min 11.3C Grass 9.4C Rain 0.6 mm]. Chilly overnight the air minimum down to 8.6C and on the grass to 6.0C both lowest of the month. At 0900 GMT on the 5th the temperature had risen to 13.8C after some spots of rain. The morning was dull, but there were sunny spells by the afternoon (Cardiff 21.6C Sennybridge 5.7C Capel Curig 2.4 mm Aberdaron 10.6h Valley 8.4h) [Max 18.2C Min 8.6C Grass 6.0C Rain trace].

The 6th began very fine and sunny with a light WNW'ly breeze. Pressure was steady on 1031 mb with high 1032 mb off SW Ireland having a ridge to southern Britain. Just 3 oktas of fair-weather cumulus and cirrus clouds with very good, clear visibility (Usk 23.9C Sennybridge 2.6C Swyddfynnon 0.2 mm St Athan 13.4C Valley 12.1h) [Max 20.5C Min 9.8C Grass 6.8C Rain nil]. Another fine day on the 7th with mostly fair-weather cumulus clouds flying along on a light WNW'ly breeze. Pressure was on 1028 mb. Sunny afternoon (Frittenden 28.1C Usk 27.0C Sennybridge 3.9C NSR St Athan 14.0h Valley 13.8h) [Max 20.9C Min 12.3C Rain nil]. Pressure was high 1029 mb on the 8th in an elongated high-pressure area 1030 mb from SW Ireland to the Irish Sea. Just 1 okta of cloud cover at 0900 GMT, cumuli to the S forming a line across the Snowdonia Mountain range by 0930 GMT, the sky was bright blue. Very fine sunny and warm (Charlwood 30.0C Usk 28.3C Swyddfynnon 3.8C NSR St Athan 14.0h Valley 12.6h) [Max 22.9C Min 11.2C rain nil]. With high 1031 mb established over Britain and Ireland it was very fine, sunny and warm on the 9th with cloud increasing towards noon then decreasing later (Ross on Wye 30.1C Usk 29.5C Capel Curig 4.6C NSR Lake Vyrnwy 13.9h Valley 13.3h) [Max 23.6C Min 10.7C Rain nil]. On he morning of the 10th it was calm with very good visibility although slight pollutant smoke could be seen at low levels. The temperature at 0900 GMT t was 20.3C. Little cloud in the sky and variable light airs developed later. Soil and concrete were dry although there had been heavy dew. Watering of vegetable garden was increasingly necessary (Usk 31.8C Bala 8.4C NSR Valley 13.8h) Max 26.2C Min 13.3C Rain nil].

There was not a cloud in the sky that I could see on the morning of the 11th, the sky looked milky at lower level with slight pollution haze. At Marchlyn Mawr reservoir 2100 ft an instrument recording ozone (Welsh Air Quality Forum) measured 128 µg per m-3 increasing on a 24h average to a high 167µg per m-3 . A slight amount of a pale coloured dust was collected. Very fine and very warm (Shawbury 33.4C St Athan 33.2C Hawarden 30.9C Capel Curig 9.7C St Athan 1.8 mm St Athan & Valley and 14.0h) [Max 26.8 Min 15.1C Rain nil]. Blue sky and no clouds again on the 12th, and warm the temperature at 0900 GMT was 23.7C (dewpoint 18.1C). There was slight smoke haze and ozone levels had increased at Marchllyn Mawr to a high 154 µg per m-3 . A hot day (Wiggonholt 34.5C Usk 33.2C Bala 8.6C NSR Lake Vyrnwy 13.8h Valley 13.6h) [Max 28.8C Min 16.5C rain nil]. A covering of cirrus clouds on the morning of the 13th, hazy sunshine. Ozone level at Marchllyn Mawr was 140 µg per m-3. Very warm at 0900 GMT the temperature 26.1C and the garden with only slight breezes hung heavy with perfume from sweet peas. Sea breezes set in from the NE later (Charlwood 34.9C Usk 33.8C Gorwel Heights 31.5C Bodelwyddan 30.8C Bala 10.8C Lake Vyrnwy 13.2h Valley 13.1h) [Max 29.0C Min 18.1C Rain nil]. Temperature graph at Llansadwrn showing stepwise increase to highest in August 2022.Another hot day on the 14th with light and variable N or NE'ly breeze. Pressure was on 1008 mb with high-pressure 1020 mb Norway and a thundery low 1007 mb Iceland. Cloud was massed to the NW and sferics were observed at 0230 GMT the result of storms off South Stack. Valley AUTO reported rain at 0230 GMT, but it was dry here. Hazy sunshine with moderate to high average levels of ozone 159 µg per m-3 currently 150 µg per m-3. Combining of the good cereal crop on the Old Cricket Field was done in the dry today. Thunder was hear at Gorwel Heights at 1532 GMT. There has been a 9-day stepwise increase in the maximum temperature here reaching 31.1C today, the highest of the month after a minimum of 18.2C highest of the month (Charlwood 34.1C Cardiff 33.1C Bala 10.9C NSR St Athan 12.1h Valley 10.8h) [Max 31.1C Min 18.2C Rain 1.9 mm]. A dull and wet morning on the 15th after recent rain. Pressure 1002 mb was falling with complex-low pressure 1001 mb central England and frontal wave 1002 mb off SW Ireland. Much cooler after the heat of yesterday 17.7C at 0900 GMT after a minimum of 15.6C. A trace of pale coloured dust was collected, likely to be of Saharan origin. There were some glimpses of sunshine at times (Congingsby 32.1C Usk 29.9C Swyddfynnon 11.4C Capel Curig 4.2 mm Valley 5.4h) [Max 22.1C Min 15.6C Rain trace].

The first 15 days had rainfall of 40.8 mm (40%) & [45%] of the monthly mean averages. The mean temperature 18.4C was (+2.7] & [+2.8] of averages.

Pressure was rising on the 16th, but the morning was dull and damp with slight rain and drizzle. Low stratiform cloud with poor visibility. There was a thundery low near Brest, France, sferics were observed crossing the Channel to the isle of Wight. Low 1003 mb was over the N Sea. The afternoon remained dull and the day's maximum 17.3C was lowest of the month (Santon Downham 26.8C Cardiff 22.1C Sennybridge 5.5C St Athan 9.0 mm Lake Vyrnwy 3.4h Valley 0.1h) [Max 17.3C Min 14.3C Grass 11.8c Rain 1.4C]. Sky ovecast on the 17th, but becoming a little brighter at 0900 GMT. Pressure 1016 mb was rising in a ridge of high-pressure to the N Scotland from Azores high 1030 mb. A cold front, associated with low 998 mb Norway to Irish Sea. There was a thundery low 1009 mb over Normandy. The sky opened up at 0920 GMT and the afternoon was sunny and the day dry (Kew 26.4C Scolton C. P. 21.8C Lake Vyrnwy 12.4C Bala 6.0 mm Valley 4.9h) [Max 20.1C Min 14.2C Rain nil]. At midnight on the 18th low 977 mb SW Iceland brought frontal cloud W of Ireland. By morning we had a moderate S'ly breeze and local dust from agricultural work on the Old Cricket Field. After shallow ploughing and rolling it was seeded and the process resulted in a lot of dust in the unusually dry conditions. There was rain in sight over the mountains with visibility moderate to good. Slight rain commenced at 0910 GMT that would hopefully lay the dust. A dull breezy day. The sky was clear in the north about 2045 GMT when green coloured aurora were seen (Heathrow 27.8C Usk 23.1C Capel Curig 10.9C and 7.2 mm St Athan 0.8h) [Max 17.9C Min 14.0C Rain 1.4 mm]. Some clear sky overnight, but by the morning of the 19th cloud was increasing. There was a moderate WSW'ly breeze and it was feeling fresher the temperature at 0900 GMT 15.6C. Pressure 1014 mb was rising. Low 981 mb was SE Iceland and a cold front was lying East Anglia to the Isle of Wight. We were in a cool cleaner Atlantic airstream. Cloudy with sunny spells and dry day (Cavendish 26.5C Cardiff 22.2C Sennybridge 5.7C Bala 1.4 mm Aberporth 10.9h Valley 6.5h) [Max 19.3C Min 1.9C Grass 7.4C Rain nil]. A very breezy and gusty day on the 20th reaching gale-force on the Snowdonia Mountains summits. Pressure was on 1014 mb with low 993 mb between Iceland and Scotland. It was raining in the NW Ireland and Scotland and S Wales. There was a slow-moving cold front over the North Channel slowly making its way down to North Wales. Fresh to strong winds in the afternoon, with some sunshine, and evening when there was light showery rain (Hawarden 22.9C Usk 10.2C Libanus 2.8 mm Valley 8.3h) [Max 19.3C Min 10.9C Rain 0.8 mm].

Slight showers of rain overnight and 0300 GMT on a cold front, but it was a bright morning on the 21st with any clouds decreasing. Pressure 1015 mb was rising with a low 994 mb Orkney and low 1013 mb SW Approaches. Sunny morning, cloudier later afternoon (Cavendish 25.6C Cardiff 24.1C Mona 11.8C Gogerddan 7.2 mm Valley 5.6h) [Max 19.5C Min 12.5C Rain 0.4 mm]. Fine and breezy on the 22nd with moderate to good visibility. Mostly cloudy with altocumulus and cumulus. Copper line broadband down for no apparent reason, reported, but told nothing wrong with it! Light to moderate rain in the morning (11.4 mm/h at 1034 GMT), the afternoon was dry with a few sunny spells (Marham 26.4C Hawarden 22.8C Whitechurch 11.5C Capel Curig 4.0 mm Valley 5.8h) [Max 19.7C Min 13.4C rain 4.2 mm]. Dull and damp, but warm on the 23rd with a few spots of rain. Frontal cloud lay over the Irish Sea 1011 mb here with low 997 mb between Iceland and Scotland. Some glimpses of sunshine (Santon Downham 28.6C Hawarden 24.3C Lake Vyrnwy 14.3C Milford Haven 2.6 mm Valley 3.3h) [Max 21.1 Min 15.2C rain 11.4 mm]. Rain overnight heavy bursts 32.6 mm/h at 0056 GMT) and 0620 GMT (14.6 mm/h). At 0900 GMT on the 24th it wasn't raining and there was a small break in the stratocumulus that was hugging the mountaintops of Snowdonia. The 11.4 mm was second largest of the month along with the 37.0 mm on the 1st the only two days in double digits. Pressure 1014 mb was rising with a cold front lying over Wales from the Western Isles to Cornwall. Brighter for a while then turned dull again Cavendish 29.5C Mumbles Head 22.6C Mona 14.6C Sennybridge 12.0 mm Valley 1.6h) [Max 19.6C Min 14.6C Rain nil]. With pressure risen to 1021 mb and on the 25th it was a fine and sunny day. Low 999 mb was now over the Norwegian Sea E of Iceland with the cold from Norway - English Channel -Atlantic W of Iberia. (Frittenden 24.0C Cardiff 23.2C Mona 6.5C Usk 1.4 mm Aberporth 9.8h [Valley 10.0h]) [Max 20.4C Min 11.2C Rain 1.9 mm].

On the 26th it was overcast with slight rain and drizzle, visibility was poor and there was little or no wind. At 0900 GMT with pressure on 1019 mb there was a frontal-wave over the Irish sea associated with low 1007 mb over the Atlantic W of Ireland. There were occasional light airs from the NE, drizzle turned to slight rain and sometimes glimpses of sunshine. There was a heavy shower of rain at 1230 GMT. The broadband mysteriously started up again today. It had been off for 4 days and according to suppliers Plusnet there was nothing wrong with it, the speed was better too (Charlwood 25.8C Usk 23.2C Swyddffynnon 6.9C Valley 11.0 mm Bala 5.3h) [Max 18.5C Min 12.7C Rain 4.7 mm]. Fine and sunny on the 27th and with high 1021 mb Dublin pressure here too was 1021 mb. The NE'ly breeze felt cool, but it was warm in the sun (Coton in the Elms 26.4C Usk 26.0C Sennybridge 6.2C Libanus 0.3 mm Valley 12.0h) [Max 19.8C Min 12.4C rain nil]. The 28th started promisingly, fine and warm with 19.1C at 0900 GMT. Pressure was on 1022 mb with high 1027 mb Norwegian Sea. There was a lot of cloud in the high and the weak sunshine diminished as the cloud thickened by afternoon. Despite the cloud it was warm and dry for a family party, gathered from far and wide, in the garden with pizza oven and BBQ in use (Bramham 25.6C Porthmadog 25.1C Bala 7.8 mm NSR Hawarden 5.6h) [Max 22.2C Min 12.7C Rain 0.4 mm]. The 29th began dull and damp after a little overnight rain. The sky was covered with moderately high altostratus cloud. This broke up later to give a sunny afternoon (Whitechurch 25.5C Sennybridge 6.4C Hawarden 1.0 mm St Athan 9.4h Valley 6.4h) [Max 21.5C Min 15.3C Rain nil]. Very fine and sunny on the 30th with 5 oktas cloud cover composed of cumulus, cirrus and a few fair-weather cumulus overhead on a cool E'ly wind. Pressure 1027 mb was rising, the high 1035 mb over the Norwegian sea had a ridge to the English Channel. A sunny afternoon (Wiggonholt 25.4C Usk 24.9C Bala 7.8C Whitechurch 0.2 mm Valley 12.0h Tiree 12.9h) [Max 19.2C Min 13.2C Rain nil]. The 31st was also a dry and fine day with plenty of sunshine. Pressure was steady on 1028 mb with Norwegian High 1035 mb. There was a low 1016 mb off Brest, France (Usk 25.1C Bala 8.3C NSR Valley 11.1h Stornoway 13.0h) [Max 20.6C Min 12.2C Rain nil].

The month ended with a total of 67.4 mm of rainfall (66%) & [75%] of averages, least since 2018 ranking 26 in Llansadwrn records back to 1928. The mean temperature 17.5C highest since 1997 ranked 3rd in station records since 1979. A sunny month with 243.4h (provisional)sunshine recorded at RAF Valley.

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September 2022

September 1st - began fine with broken clouds altocumulus and cumulus and good, but somewhat hazy visibility. Pressure was on 1024 mb with high 1028 mb North Sea to Azores while showery fronts were affecting N France and Kent. A sunny and dry afternoon ( ) [Max 21.2C Min 12.9C Rain nil]. The 2nd was also fine and warm the temperature already 19.9C at 0900 GMT. A few cumulus and cirrus clouds with good visibility. Pressure was high 1037 mb Svarlbard and remained high N Azores 1029 mb, hurricane Danielle was W of the Azores. Warm and sunny afternoon the temperature reaching 23.0C. Planted another row of leeks on vegetable patch, you can't have too many leeks. Heavy shower of rain at 1720 GMT falling at a rate of up to 36 mm/h water in the leeks nicely. (Porthmadog 25.2C Whitechurch 9.3C Gogerddan 7.6 mm Tiree 42.0 mm Hawarden 6.6h Valley 4.9h) [Max 23.0 C Min 13.6C Rain nil]. The 3rd began very dull the light level at 0900 GMT was only 28 W. Although the cloud was moderately high over the mountaintops it was raining. We were on the edge of a large area of rain to the NW so did not get a large fall. Pressure 1006 mb was falling with low 1002 mb was off SW Ireland with a cold front over the Celtic Sea. Pressure was high 1034 mb over the Norwegian Sea and hurricane Danielle was poised W of the Azores. The day kept dull and sunless with the best conditions around noon when light was 568 W the temperature reaching 18.9C at 1351 GMT. Dodged the rain and planted another 2 rows of purple sprouting broccoli I had spare (Hawarden 22,3C Usk 10.7C Valley 11.0 mm Tiree 62.8 mm Hawarden 0.3h) [Max 18.9C 12.8C Rain 1.3 mm]. A cold front had passed overnight and on the morning of the 4th the sky cleared rapidly. There were some cumulus clouds over mountains to the S and NE of the station, otherwise blue sky. A gusty wind at 0532 GMT, it was still breezy in the SSE'ly with moderate gusts, visibility was very good. After a fall in temperature to 13.2C at 0658 GMT it was rising again at 0900 GMT 16.9C. The MetO issued a yellow warning of thunderstorms and possibility of flash floods in SW England and Wales including Anglesey today from 8 pm overnight to 04 mm. Storms did develop near Cherbourg, France, S England, Somerset and the Midlands, even over the North Channel, but none developed here (Weybourne 26.5C Hawarden 25.5C Whitechurch 11.8C and 26.4 mm Plymouth 41.0 mm Valley 8.8h) [Max 22.9C Min 13.2C Rain 8.5 mm]. There was some rain overnight mostly slight, but a heavy burst 22 mm/h at 0141 GMT all amounting to 8.5 mm at 0900 GMT on the 5th. The S'ly wind was veering SW'ly in a clear slot between fronts, 3 oktas of developing cumulus clouds in the vicinity. Pressure 1013 mb was rising quickly with low 985 mb Celtic Sea. H Danielle was still W of Azores. Thunderstorms developed again in the S spreading N, the Snowdonia Mountains again formed a barrier and though storms reached the N Wales coast (Conwy) by evening none reached Anglesey (E Malling 26.5C Gogerddan 23.8C Trawsgoed 10.0C Capel Curig 29.8 mm Port Ellen 37.4 mm Valley 9.0h Tiree 9.8h) [ Max 22.8C Min 13.5C Rain 1.6 mm].

The 6th began fine and fairly bright with patches of blue sky to the S of the station. A complex sky with altostratus, altocumulus and cirrus clouds with lenticular altocumulus increasing at lower level towards the Snowdonia Mountains. Pressure was on 1009 mb with low 987 mb SW of Ireland. H Danielle was over the Atlantic S of Greenland W of Iberia. It was calm with intermittent light airs from the NE. There was brief heavy rain 51 mm/h at 1508 GMT and heavy thunder at 1510 GMT, followed by a fall in temperature introducing a change in the weather pattern (Shoeburyness 24.4C Porthmadog 23.2C Trawsgoed 11.2C Pembrey Sands 13.4 mm Balmoral 54.8 mm Valley 4.6h) [Max 22.6C Min 13.4C Rain 9.7 mm]. A dull and dry start on the 7th with overcast sky, but rain was in sight on the Snowdonia Mountains. Pressure was on 1004 mb and a temperature 16.6C after an overnight minimum of 13.8C. It was a day of sunshine and slight showers (Gogerddan 21.7C Lake Vyrnwy 11.3C Hawarden 20.6 mm Valley 5.8h) [Max 21,5C Min 13.8C Rain 0.2 mm]. At midnight low 992 mb was off SW Ireland and H Danielle over the Atlantic was S Greenland W of Iberia while H Earl was just S of Nova Scotia. It was a moonlit night and at 03 GMT several lenticular altocumulus were seen hovering to the SSE. By the morning of the 8th they were gone and the sky mostly cloud covered with cumulus. The weather was fair and mostly dry. Pressure was on 1002 mb with a low 997 mb Cardigan Bay. Sunny spells and a few spots of rain in the afternoon, more significant showers of rain fell in Llanfairfechan (Hawarden 20.6C Mona 10.4C Whitechurch 31.6 mm Wigonholt 35.6 mm Valley 3.8h) [Max 19.2C Min 12.6C Grass 8.8C Rain trace]. A bright morning on the 9th although cumulus clouds were increasing weather was fair. Pressure 1007 mb was rising quickly with low 1001 mb East Anglia encircled with convective clouds. Visibility was moderate to good with mist in low lying places. Sunny spells in the afternoon feeling warm in the sun we escaped the showers the day kept dry (Porthmadog 22.2C Sennybridge 8.4C Swyddffynnon 10.4 mm Valley 7.5h) [Max 20.3C Min 12.7C Rain nil].

On the 10th pressure 1018 mb was still rising the low 1008 mb now over The Netherlands. Pressure was high 1022 mb Norwegian Sea and the Pyrenees. Remnants of H Danielle over the Atlantic with H Earl in tow was 989 mb. Fine, sunny and dry day (Charlsfield 23.0C Trawsgoed 22.9C Sennybridge 10.8C NSR Durham 12.2 mm Valley 7.3h) [Max 21.0C Min 14.5C Rain nil]. A fine and mostly sunny morning on the 11th with very good visibility. Pressure 1017 mb had begun to fall with low 992 mb over the Atlantic W of Cap Finisterre likely partial remnants of H Danielle. It was raining in SW Ireland, with a warm front associated with low 1003 mb lying between Iceland and Scotland, Cork had 31.6 mm in the 24h midnight to midnight. Here sunny and a warm morning for September, harvested the last 12 lb. of good quality pink fir apple potatoes in dry soil. Rain started at 1300 GMT, a MetO yellow warning had been issued for heavy rain, but the rain here was light (Northolt 24.0C Cardiff 21.6C Bala 7.0C Capel Curig 9.4 mm Valley 1.9h Kirkwall 8.3h) [Max 20.0C Min 11.6C Grass 8.4C Rain 6.3 mm]. The temperature reached 27.2C in St James Park, London, today the 12th September. Here there was thick fog at 06 GMT and there was still fog at 0900 GMT. The sky was grey and with slight rain and drizzle it felt muggy the temperature 16.7C. Valley was on RED all morning the airfield close due to fog. It was dull and damp all day with spells of rain or drizzle, sunless (St James Park 27.6C Llysdinam 24.3C/ Mona 17.1C Sennybridge 13.1C Porthmadog 26.2 mm St Athan 0.8h) [Max 17.3C Min 16.5C rain 6.2 mm]. Much clearer very good visibility on the 13th and fine the sky becoming brighter at 0900 GMT. It felt fresher at 14.3C and 88% RH. Low AQI's today 1.0 the air could not be much cleaner with passage of a cold front overnight now lying over S Wales and central England. A little sunshine in the afternoon with the day keeping dry (Gogerddan 21.0C Mona 7.4C St Athan 7.4 mm Aberdaron 4.7h Valley 1.8h Morecambe 12.0h) [Max 16.8C Min 10.6C rain nil]. The 14th was a dull sunless day, there was a light NNE'ly breeze and it was cool. Pressure was on 1010 mb with low 989 mb Baltic. There was a weak ridge to the UK from Atlantic-high 1019 mb and 1021 mb SE Greenland (Usk 22.3C Capel Curig 4.2C St Athan 0.4 mm & 8.7h) [Max 15.7C Min 10.6C Rain 0.2 mm]. . Another dull and cool day on the 15th with pressure on 1016 mb. There was a showery airstream through the North Channel impinging upon Anglesey, although precipitation amount was very small, just spits and spots at times not showing up on the MetO radar, it made for a disappointing day. It was brighter towards the end of the afternoon when a flock of house martins and a few swallows were seen hunting overhead the station for a while. Both species have been very few and far between here this year (Pershore 20.5C Cardiff 19.9C Usk 9.2C Whitechurch 0.2 mm Aberdaron 4.0h Valley 1.0h Glasgow 9.8h) {Max 15.2C Min 11.7C Rain 0.1 mm].

The first 15 days had rainfall of 40.8 mm (41%) & [40%] of the monthly mean averages, the same as in August. Temperatures were well above averages, the mean 16.4C was (+2.3] & [+2.4].

The 16th was fine, sunny and felt fresh the humidity down to 78% at 0900 GMT. Overnight the temperature had dipped below 10C to 9.4C and had risen to 12.6C. A few cumulus clouds around over the Snowdonia Mountains and one of two blowing over the station on a light to moderate N'ly breeze. Visibility was very good and clear. Pressure 1022 mb was rising with a high 1027 mb W of Scotland and with low-pressure 985 mb over the Baltic resulting in the cool N'ly air flow. Maximum temperatures below 20C today. Masses of red fruits on honeysuckle this autumn after a great flowering season. No birds around to be interested in them at the moment (Pershore 19.4C Cardiff 19.0C Sennybridge 4.5C Bodelwyddan 3.2 mm Valley 10.8h) [Max 16.2C Min 9.4C Rain nil]. Another fine, but cool day, on the 17th with again very good visibility. Pressure was steady on 1026 mb within a North Wales high, not often that can be said. Dry with good spells of sunshine (Pershore 19.9C Usk 19.6C Swyddffynnon -0.3C & 0.2 mm St Athan 10.3h Valley 4.0h) [Max 16.3C Min 7.0C Grass 3.0C rain nil] ....

.

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9.2#

 

 

 

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