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Eryri (Snowdonia) Mountains Winter Season 2024/25
September 2024 There was no snow observed in September. October Snow fell and was lying on Caingorm Mountain on the 10th above 3600 ft. Some wintry showers were spotted across some Eryri summits on 10th & 11th. . November
December The weather was very mild on the 1st then on the 2nd it turned colder with ice precipitation resuming around the summits. Snow fell overnight 2/3rd leaving uniformly thin layer of lying snow above 2500 ft on the morning of the 3rd. Return of mild weather on the 4th led to a rapid thaw leaving a little melting snow on the summits of the Carneddau at 3350 ft, then turning colder again icy pockets remained in places. Wintry showers around summits on the 5th and 6th with remnants of ice precipitation in places. Wintry showers on the 12th to 14th . Colder again by the 19th with ice precipitation on the ground as low as 2250 ft thawing on the 20th. Colder again 21/22nd with sprinklings of hail and snow seen as low as 2250 ft. Some small snow patches and pockets of snow and ice persisted in places until 27/28th bit were absent before the end of the month. January 2025 Snow was absent on the 1st there were showers of snow pellets and snow on the 2nd with frost to low levels. Snow fell overnight 2/3rd and by morning was lying generally at 1000 ft, and had settled as low as 425 ft on the lower slopes of the Carneddau and 300 ft in SE Anglesey. Snow continued lying at 2000 ft on the Carneddau until the 13th. On the 14-17th there were some areas of snow with snow patches and snow filled gullies in several places with cornices on cliffs-tops. On the 18th higher temperature resulting in thaw reduced number and size of patches at 2250 ft, but larger patches remained at 2850 ft. Fresh snow fell on the 21st with a thin cover on the highest summits in places covering older areas of snow. Wintry showers continued on the 22nd and 23rd with snow lying around the summits. Snow fell overnight 25/26th leaving a thin cover lying at 2250 ft on the morning of the 26th. Snow in the form of patches, cornices and icy pockets remained till the end of the month. February Snow was present at the beginning of the month in variable amounts around the summits. Some areas were covered while others were mostly clear. There were snow patches with some cornices on cliffs...
NotesObservations are made as near to 0900 GMT as possible. I have a good view from Llansadwrn, weather permitting, across the Menai Strait towards the Snowdonia Mountains. I can see the northern slopes of the mountain range from Moel Eilio (west of Snowdon), Snowdon summits (Yr Wyddfa and Crib Goch), the Glyderau and Carneddau to Foel-fras and Drum to the east of the range near the Conwy Valley. With the aid of binoculars I make daily records that include any ice precipitation observed, the lowest altitude of snow lying at ( >= 50% cover), at ( >= 30% cover) and snow patches. I aim to update the diagram during the season at least twice weekly if there is any snow.
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 "snow_eryri-tryfan_gp191124.jpg")
 "Snowdonia snowline current histogram.")
; "Winter 2023-2024."){kind=small}
; "Winter 2022-2023."){kind=small}
; "Winter 2021-2022."){kind=small}
; "Winter 2020-2021."){kind=small}
