Llansadwrn (Anglesey) Weather
Daily Observations 2003
at 0900 GMT
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Llansadwrn (Anglesey) Weather
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CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JANUARY 2003
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-09GMT--> ---Air Temperature--- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp Dpt RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C GrSS Rain SLHTGF Press hrs hrs Evap
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01 8 S 3 5 10 10.0 9.8 99 10.2 3.5 0.4 8.1 7.5 7.0 7.2 7.5 8.2 1 2 3 0 0.1 000000 990 0.0 0.0 0.0
02 7 NW 1 7 10 6.7 6.3 97 9.4 6.0 3.6 6.6 7.1 7.6 7.6 7.6 8.2 1 2 1 0 13.1 000000 983 14.5 0.0 0.2
03 8 NE 3 7 77 2.5 1.2 91 4.2 1.9 1.3 4.2 5.1 6.7 7.3 7.8 8.2 1 3 4 0 0.4 s02000 999 0.5 0.0 2.2
04 4 E 2 8 05 2.1 -0.4 84 4.5 1.8 0.5 2.2 3.3 5.2 6.1 7.2 8.1 1 0 0 0 tr/f 000000 1016 0.0 4.5 0.3
05 0 E 1 8 04 -1.4 -2.3 93 4.5 -2.2 -7.3 0.4 1.7 3.5 4.1 6.5 8.0 3 0 7 0 0.0 000000 1019 0.0 9.6 1.2
06 1 E 1 7 04 -0.2 -1.1 94 4.1 -1.5 -5.5 0.0 1.2 2.7 3.8 5.3 7.6 3 4 7 0 0.0 000000 1019 0.0 12.8 0.4
07 3 SE 3 7 04 -0.8 -5.0 73 1.7 -1.2 -5.0 -0.8 0.5 2.1 3.0 5.1 7.4 3 5 7 0 0.0 000000 1020 0.0 20.4 0.0
08 2 NE 1 7 04 -1.3 -2.8 89 3.9 -2.9 -6.7 -1.0 0.0 1.7 2.6 4.8 7.0 3 5 7 0 0.0 000000 1020 0.0 11.5 1.0
09 6 NE 3 7 03 3.3 0.1 79 5.0 -1.3 -3.1 0.0 0.5 1.6 2.8 4.5 6.6 3 0 4 0 tr 000000 1026 0.0 0.0 1.6
10 7 NE 3 7 02 4.2 -1.9 64 5.9 3.3 0.7 1.3 1.6 2.0 2.8 4.1 6.5 1 1 0 0 0.0 000000 1032 0.0 0.0 1.2
11 4 SE 1 8 04 0.0 -0.9 94 5.7 -1.8 -5.7 0.7 1.4 2.2 2.9 4.2 6.2 3 0 7 0 0.0 000000 1036 0.0 6.0 0.9
12 7 W 4 7 05 5.2 2.8 84 8.5 0.0 -3.2 2.0 2.0 2.3 2.8 4.2 6.2 1 1 4 0 0.7 000000 1033 2.2 0.0 0.5
13 8 SW 4 7 02 8.5 7.7 94 9.5 5.2 3.0 6.1 5.6 4.7 4.0 4.6 6.2 1 2 3 0 tr 000000 1029 0.0 0.0 0.6
14 8 SW 5 5 50 9.0 8.0 93 9.5 8.5 6.5 7.2 6.8 6.0 5.3 5.2 6.2 1 2 3 0 6.2 000000 1024 5.3 0.0 1.5
15 4 W 4 7 05 6.5 5.4 92 8.5 6.5 3.6 5.8 6.3 6.3 6.0 5.8 6.3 1 2 3 0 0.0 000000 1014 0.0 0.0 0.9
16 7 SW 4 7 05 7.0 5.7 91 10.0 4.9 0.8 4.3 4.5 5.1 5.5 6.0 6.5 1 1 0 0 12.2 0000G0 1023 4.0 0.0 2.1
17 8 W 3 4 63 5.9 5.7 98 7.6 5.9 5.1 6.5 6.7 6.5 6.0 6.0 6.8 2 3 3 0 1.8 0040G0 1004 0.9 0.0 0.7
18 6 S 4 7 05 7.0 4.7 85 9.0 4.6 0.7 4.6 5.0 5.2 5.8 6.2 6.9 1 2 1 0 2.7 000000 1008 4.1 0.0 1.2
19 7 W 1 5 10 6.3 6.0 98 10.1 6.3 4.0 6.0 6.2 6.2 6.2 6.3 6.9 1 2 3 0 2.9 000000 993 4.2 0.0 1.3
20 8 S 6 5 60 9.8 8.6 92 9.9 4.3 0.6 7.2 6.8 6.1 6.1 6.5 7.0 1 2 3 0 1.6 000000 975 2.1 0.0 1.6
21 7 S 1 6 02 6.8 5.0 88 7.1 6.1 3.8 5.7 5.8 6.0 6.2 6.5 7.0 1 2 3 0 6.9 000000 974 3.8 0.0 0.2
22 7 NW 3 7 10 5.9 5.0 94 6.5 4.8 1.1 5.5 5.8 6.0 6.2 6.5 7.1 1 2 3 0 0.6 004000 991 1.0 0.0 0.7
23 1 N 1 7 04 1.5 1.0 96 9.1 1.0 -3.3 1.5 3.0 5.0 5.8 6.5 7.1 1 1 5 0 0.8 000000 1025 2.2 0.0 1.8
24 8 S 5 7 10 9.1 8.5 96 9.6 1.5 -2.4 7.2 6.5 6.0 5.8 6.4 7.2 1 2 3 0 15.6 000000 1030 6.0 0.0 0.7
25 6 NW 4 6 10 7.7 7.1 96 10.0 7.2 3.9 6.8 7.1 7.1 6.6 6.7 7.2 1 2 3 0 2.5 000000 1026 3.5 0.0 0.5
26 8 SW 4 6 10 10.0 9.4 96 12.1 5.5 1.2 8.2 7.6 7.0 6.9 6.9 7.3 1 2 3 0 tr 000000 1029 0.0 0.0 0.3
27 8 SW 5 4 10 9.1 9.1 100 10.0 8.8 6.3 8.4 8.0 7.9 7.3 7.2 7.3 1 2 2 0 1.7 000000 1029 1.4 0.0 0.8
28 7 NW 6 7 80 5.8 2.9 82 6.5 4.5 0.7 5.0 5.5 6.5 7.2 7.5 7.5 1 1 3 0 2.4 004000 1018 2.4 0.0 1.5
29 2 N 6 7 05 4.7 -1.0 67 6.5 3.8 1.3 3.0 4.4 5.8 6.4 7.1 7.5 0 0 0 0 2.8 000000 1019 2.8 0.0 1.8
30 7 N 6 7 01 1.8 -2.6 73 1.8 0.4 0.0 2.4 3.9 5.2 5.9 6.7 7.5 1 2 9 0 0.0 s03000 1015 0.0 0.0 1.3
31 5 NE 2 8 04 0.9 -5.2 64 6.0 0.0 -3.1 0.7 1.8 3.4 4.7 6.2 7.5 0 0 0 0 7.2 000000 1025 4.5 0.0 0.6
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Mean
6 5.0 3.1 88 7.3 3.1 0.1 4.1 4.5 5.1 5.4 6.1 7.1 1014
Total 82.2 65.4 64.8 29.6
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(.) Differences from 1993-2002 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (82%) [84%] and
Mean maximum 7.3 (-0.7) [-0.3] Sleet/snow falling 2 ( 0.0) 79% of 1928-2002 average.
Mean minimum 3.1 (+0.2) [+0.7] Snow lying (at 09GMT) 0 (-0.4) Most in a day: 15.6 mm on 24th
Mean 5.2 (-0.3) [+0.2] Hail <5 mm 5 {+1.6} No. days:
No. days <0.0C 6 (+1.0) Hail >=5 mm 0 {all types} 0.0 mm 8 (+ 0.9)
Mean grass min 0.1 (-0.4) Thunder heard 0 (-0.6) >=0.2 mm 18 (- 1.2)
Lowest grass min -7.3 (-0.7) Gales 2 >=1.0 mm 14 (- 1.2)
No. days <0.0C 10 (-3.7) Fog (at 09GMT) 0 >=5.0 mm 6 (- 0.4)
Mean soil 30cm 5.4 (+0.4)
Lysimeter:
Highest maximum 12.1C (+0.1) on 26th. Lowest minimum -2.9 (-0.4) on 8th. PE -1.4 mm
Minimum relative humidity: 59% on 30th. No. days at 30 cm >=5.6C 19; days <5.6C 12 PWB 83.6 mm
* PWS 83.7 mm
* Rainfall 82.2 mm driest since 44.0 mm in 2001; ranked 27th driest since 1928. PWD -0.1 mm
* Lowest mean of 0.3C on 7th lowest in January since -1.7C in 1997.
* No. days airfrost 6 (not unusual) almost equal to the whole of 2002 that had only 7. Piche: 29.6 ml
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Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
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CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR FEBRUARY 2003
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-09GMT--> ---Air Temperature--- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp Dpt RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C GrSS Rain SLHTGF Press hrs hrs Evap
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01 5 W 1 5 10 3.9 3.7 98 7.7 0.9 -0.9 3.2 3.9 4.2 4.5 5.8 7.3 1 2 4 0 2.1 000000 1014 2.0 0.0 0.8
02 8 W 5 7 26 5.1 2.9 86 5.5 3.8 -0.2 4.2 4.6 5.2 5.2 6.0 7.1 1 3 4 0 2.3 s04000 1001 1.2 0.0 0.9
03 5 NW 3 7 87 2.4 -0.6 80 6.7 1.6 -1.7 1.5 2.5 4.0 4.9 5.8 6.9 1 1 6 0 0.3 003000 993 0.0 0.0 0.8
04 3 N 4 7 05 2.2 -1.5 77 5.4 0.8 -3.0 1.0 2.1 3.4 4.4 5.5 6.9 5 5 6 0 1.5 s03000 1001 0.6 0.0 0.6
05 5 NW 1 7 05 0.0 -1.2 92 5.5 -1.4 -5.2 0.8 1.7 3.0 4.1 5.2 6.8 5 5 9 0 0.4 004000 1013 0.2 7.2 1.0
06 8 S 1 7 50 5.5 3.1 84 8.6 -1.5 -5.3 3.3 3.2 3.3 4.0 5.1 6.5 1 2 3 0 1.3 000000 1013 0.7 0.0 0.5
07 7 SW 1 7 04 7.3 6.9 97 9.4 5.5 3.5 6.0 5.7 5.4 5.2 5.3 6.6 1 2 3 0 1.2 000000 1017 1.5 0.0 0.4
08 6 S 5 7 10 7.5 6.8 94 9.1 7.0 5.8 6.8 6.6 6.3 6.2 6.0 6.5 1 2 3 0 23.5 000001 1014 13.3 0.0 0.4
09 1 W 1 6 10 3.7 3.5 98 10.2 3.8 -0.4 5.5 6.4 6.8 6.5 6.6 6.8 1 2 5 0 0.0 000000 1013 0.0 0.0 1.1
10 7 S 4 8 02 5.8 -3.6 51 7.9 1.0 -3.8 3.2 3.8 5.2 5.7 6.5 6.8 1 0 0 0 2.7 000000 1016 5.2 0.0 1.4
11 1 SW 1 6 10 4.0 4.0 100 9.1 3.7 -0.3 3.8 4.5 4.5 5.8 6.2 7.0 1 2 2 0 0.1 000000 1023 0.0 0.0 0.3
12 9 NE 1 4 10 4.1 4.1 100 5.2 2.0 -2.7 4.0 4.3 5.2 5.3 6.1 7.0 1 2 2 0 tr 000002 1030 0.0 0.3 0.0
13 7 SE 1 3 10 0.0 0.0 100 7.4 -2.2 -5.6 1.5 2.5 4.0 5.0 6.0 7.0 3 0 8 0 0.0 000001 1028 0.0 10.0 0.9
14 0 E 1 5 04 0.5 1.2 88 4.6 0.0 -2.0 2.9 4.0 5.0 5.1 5.9 6.8 1 0 5 0 0.0 000000 1030 0.0 2.5 1.2
15 0 NE 1 7 04 -0.4 -6.5 63 8.4 -3.1 -9.0 0.5 1.7 3.5 4.4 5.5 6.8 3 0 7 0 0.0 000000 1036 0.0 9.6 1.7
16 1 00 0 7 04 -0.5 -1.4 94 6.0 -1.8 -6.8 0.4 1.5 3.0 3.9 5.2 6.8 3 0 7 0 0.0 000000 1035 0.0 10.7 0.9
17 0 NE 1 7 04 -0.9 -2.1 92 8.8 -2.5 -7.9 0.3 1.3 2.8 3.5 5.1 6.5 3 0 7 0 0.0 000000 1037 0.0 16.0 1.6
18 1 NW 1 7 04 -0.7 -5.3 71 10.0 -3.0 -9.0 0.1 1.2 2.5 3.3 5.0 6.5 2 0 5 0 0.0 000000 1025 0.0 9.6 3.5
19 6 SE 3 7 04 3.0 -8.0 44 8.9 -0.7 -5.2 0.0 1.0 2.3 3.0 4.5 6.2 3 0 0 0 0.0 000000 1012 0.0 5.3 1.9
20 7 NE 1 6 04 2.5 -1.1 77 8.5 -0.5 -4.2 0.1 1.5 2.4 3.0 4.2 6.0 3 0 0 0 tr 000000 1008 0.0 6.6 1.0
21 7 S 2 6 04 7.1 4.3 83 12.2 2.2 -1.2 3.0 3.0 3.5 3.6 4.5 5.8 1 1 3 0 0.0 000000 1017 0.0 0.0 1.6
22 0 SE 4 7 04 7.5 0.7 62 12.4 1.7 -2.5 2.0 2.7 3.8 4.2 4.8 5.6 1 0 5 0 1.0 000000 1019 1.8 0.0 2.9
23 6 S 5 6 80 8.8 7.3 90 10.3 5.8 1.3 6.4 5.8 5.2 5.0 5.2 5.9 1 3 3 0 tr/fr 000000 1015 0.0 0.0 0.8
24 4 SE 1 7 04 4.0 2.8 92 13.3 2.0 -2.4 2.6 3.5 5.0 5.2 5.5 6.0 1 1 4 0 0.0 000000 1021 0.0 0.0 2.2
25 7 SE 1 7 04 8.4 3.8 73 12.4 4.0 1.0 5.3 5.5 5.8 5.8 5.8 6.1 1 0 0 0 0.3 000000 1014 0.2 0.0 1.9
26 7 SE 2 6 04 10.2 4.1 66 14.9 7.7 4.5 6.5 6.5 6.5 6.3 6.1 6.5 1 2 3 0 1.6 000000 1006 1.6 0.0 1.5
27 8 SE 1 7 80 8.6 7.5 93 10.6 7.3 5.6 7.3 7.3 7.2 7.0 6.5 6.5 1 3 3 0 0.1 000000 1008 0.0 0.0 1.0
28 7 S 1 7 03 10.3 6.7 78 11.8 6.6 2.8 6.6 6.4 6.7 7.0 6.8 6.8 1 2 3 0 7.1 000000 1008 7.5 0.0 1.1
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Mean
5 4.3 1.5 83 9.0 1.8 -2.0 3.2 3.7 4.5 4.9 5.6 6.6 1017
Total 45.5 35.8 77.8 33.9
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(.) Differences from 1993-2002 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (43%) but [61%] an
Mean maximum 9.0 (+0.5) [+0.5] Sleet/snow falling 2 (-1.4) 60% of 1928-2002 average.
Mean minimum 1.8 (-1.3) [-0.3] Snow lying (at 09GMT) 0 (-0.8) Most in a day: 23.5 mm on 8th.
Mean 5.4 (-0.4) [+0.1] Hail <5 mm 4 {-0.6} No. days:
No. days <0.0C 9 (+5.5) Hail >=5 mm 0 {all types} 0.0 mm 11 (+ 5.3)
Mean grass min -2.0 (-3.0) Thunder heard 0 (-0.5) >=0.2 mm 13 (- 6.3)
Lowest grass min -9.0 (-4.2) Gales 0 >=1.0 mm 10 (- 4.6)
No. days <0.0C 21 (+9.2) Fog (at 09GMT) 0 >=5.0 mm 2 (- 5.3)
Mean soil 30cm 4.9 (-0.8)
Lysimeter:
Highest maximum 14.9C (+2.7) on 26th. Lowest minimum -3.1 (-2.0) on 15th. PE -0.8 mm
Minimum relative humidity: 37% on 18,19th. No. days at 30 cm >=5.6C 8; days <5.6C 20 PWB 46.3 mm
* Most days AF 9 since 1996 that had 12. Most days GF since 22 in 1991. PWS 48.4mm
* Hi max of 14.9C on 26th ranks 3rd in Feb to 17.2C in 1985 and 15.0C in 1998. PWD -2.1 mm
* Lo min of -3.1C coldest since -4.9C in 1997 but ranks 10th.
* Rainfall 45.5 mm driest in Feb since 30.8 mm in 1993; ranks 20th driest since 1928. Piche: 33.9 ml
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Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
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CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR MARCH 2003
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-09GMT--> ---Air Temperature--- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp Dpt RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C GrSS Rain SLHTGF Press hrs hrs Evap
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01 8 S 5 7 03 8.8 5.5 80 10.9 5.3 2.5 6.2 6.0 6.4 6.8 6.9 7.0 1 2 3 0 3.3 000000 1006 2.1 0.0 0.8
02 1 SW 2 6 01 5.2 5.0 98 11.7 2.5 -1.6 4.0 4.8 6.1 6.7 7.0 7.1 1 2 4 0 tr 000000 1010 0.0 0.0 1.0
03 8 W 1 7 05 5.5 3.6 87 11.3 3.7 -0.7 4.7 5.1 6.0 6.7 7.0 7.1 1 1 1 0 3.2 000000 1013 3.2 0.0 1.1
04 8 SW 5 6 60 10.1 9.3 95 10.8 5.5 4.7 8.9 8.3 7.5 7.2 7.1 7.3 1 3 3 0 0.8 000000 1006 0.6 0.0 0.8
05 6 S 4 6 01 7.1 6.4 90 9.4 5.9 3.8 6.5 7.0 7.5 7.7 7.5 7.3 1 2 3 0 0.0 000000 1008 0.0 0.0 0.8
06 3 SW 1 7 10 5.4 4.5 94 11.1 3.2 -0.8 4.0 5.0 6.5 7.1 7.4 7.5 1 1 1 0 tr 000000 1014 0.0 0.0 2.3
07 7 S 5 6 80 8.5 3.7 72 8.6 5.2 3.5 6.5 6.5 7.0 7.2 7.3 7.5 1 1 3 0 13.8 004000 1004 9.5 0.0 1.3
08 8 SW 6 5 60 8.0 7.4 96 9.5 3.4 0.2 6.2 6.0 6.3 6.8 7.2 7.5 2 3 3 0 12.5 0000G0 1008 8.7 0.0 0.8
09 7 S 7 6 05 9.1 5.6 79 9.6 8.0 6.9 7.5 7.5 7.4 7.3 7.3 7.6 1 1 0 0 0.8 0000G0 1008 1.9 0.0 1.9
10 7 SW 6 7 04 9.2 5.5 77 10.7 8.0 6.4 7.5 7.5 7.3 7.5 7.5 7.7 1 1 0 0 0.4 000000 1010 0.3 0.0 1.7
11 5 SW 5 5 05 8.5 7.2 92 11.4 8.0 6.8 8.0 7.8 8.0 7.8 7.5 7.6 1 0 0 0 0.4 000000 1007 0.5 0.0 1.6
12 2 N 4 7 05 5.4 1.1 74 8.1 4.5 2.1 2.5 6.0 5.9 7.1 7.8 7.9 1 0 5 0 0.0 000000 1033 0.0 0.0 1.7
13 1 SE 1 7 04 3.7 -1.6 72 11.2 0.9 -4.7 2.5 3.8 5.9 7.1 7.8 7.9 1 0 5 0 0.0 000000 1039 0.0 1.8 1.3
14 0 NE 1 7 04 3.7 -0.9 72 15.3 -1.5 -7.0 1.7 3.5 5.5 6.7 7.4 7.8 2 0 5 0 0.0 000000 1035 0.0 8.8 2.5
15 4 NE 1 7 04 5.0 2.5 61 16.3 1.1 -5.0 2.7 3.7 5.7 6.7 7.3 7.8 1 0 5 0 0.0 000000 1036 0.0 0.0 2.5
16 3 E 1 7 04 6.0 0.0 66 12.9 1.0 -5.7 3.0 3.9 5.9 6.8 7.2 7.9 1 0 5 0 0.0 000000 1040 0.0 0.0 1.8
17 5 NE 1 7 04 7.3 1.1 65 15.4 2.5 -2.0 3.8 4.5 6.0 6.7 7.3 7.8 1 0 5 0 0.0 000000 1039 0.0 0.0 2.2
18 1 S 1 5 04 7.9 2.7 69 14.5 2.3 -1.7 4.5 5.1 6.5 7.0 7.5 7.8 1 0 4 0 tr/fg 000001 1035 0.0 0.0 1.1
19 7 NW 1 1 42 4.7 4.7 100 11.3 1.0 -1.4 6.5 6.3 7.0 7.2 7.8 7.9 1 2 2 0 tr/fg 000001 1033 0.0 0.0 1.0
20 7 SW 2 4 10 6.3 5.9 97 8.8 0.6 -2.2 7.0 7.0 7.5 7.8 7.8 7.9 0 0 4 0 tr 000000 1031 0.0 0.0 0.1
21 7 N 1 7 04 6.7 5.8 94 14.5 4.2 1.8 6.9 6.8 7.1 7.5 7.8 8.0 1 0 1 0 0.0 000000 1028 0.0 0.0 1.6
22 3 00 0 5 04 7.4 3.9 79 11.3 1.7 -2.0 5.5 5.7 7.0 7.6 8.0 8.0 1 0 4 0 0.0 000000 1024 0.0 0.0 1.8
23 0 NE 1 6 04 10.2 2.2 58 15.5 3.6 -1.9 5.5 5.6 7.0 7.6 8.0 8.2 0 0 4 0 0.3 000000 1023 0.3 0.0 2.7
24 7 S 1 6 04 9.3 7.0 85 12.5 7.5 2.8 8.0 7.8 8.3 8.5 8.3 8.2 1 2 3 0 0.0 000000 1020 0.0 0.0 1.3
25 7 SW 2 5 04 9.4 6.9 90 14.2 5.6 1.2 8.8 8.3 8.5 8.5 8.5 8.3 0 0 1 0 0.0 000000 1023 0.0 0.0 1.7
26 1 SE 1 5 05 10.4 6.6 77 15.8 4.9 -0.1 8.5 7.8 8.4 8.8 8.8 8.4 0 0 1 0 0.0 000000 1020 0.0 0.0 1.5
27 4 E 1 6 05 11.7 7.1 74 16.0 4.8 0.8 9.0 8.2 8.9 9.2 8.9 8.8 0 0 1 0 0.0 000000 1018 0.0 0.0 2.0
28 5 NE 1 5 05 12.0 7.0 72 17.4 5.9 0.3 8.1 7.9 9.0 9.4 9.4 8.8 0 0 1 0 0.0 000000 1013 0.0 0.0 2.0
29 7 N 2 5 05 8.4 6.5 88 11.0 5.9 2.5 9.3 9.2 9.6 9.8 9.5 8.9 0 0 1 0 0.0 000000 1015 0.0 0.0 1.2
30 6 N 1 5 05 9.3 6.5 83 11.8 2.5 -2.3 8.0 7.5 8.5 9.4 9.5 9.0 0 0 4 0 0.0 000000 1020 0.0 0.0 1.2
31 2 SW 1 7 05 7.2 3.4 77 13.5 2.2 -3.0 6.2 6.8 8.3 9.2 9.5 9.0 0 0 4 0 15.8 000000 1025 5.0 0.0 2.1
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Mean
5 7.7 4.6 81 12.3 3.9 0.1 6.1 6.4 7.2 7.7 7.9 7.9 1021
Total 51.3 32.1 10.6 47.4
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1993-2002 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (72%) [61%] and
Mean maximum 12.3 (+2.2) [+2.1] Sleet/snow falling 0 (-2.6) 70% of 1928-2002 average.
Mean minimum 3.9 (-0.1) [+0.6] Snow lying (at 09GMT) 0 (-0.4) Most in a day:
Mean 8.1 (+1.1) [+1.4] Hail <5 mm 1 {-2.0} No. days:
No. days <0.0C 1 (-1.0) Hail >=5 mm 0 {all types} 0.0 mm 16 ( +6.4)
Mean grass min 0.1 (-1.7) Thunder heard 0 (-0.3) >=0.2 mm 10 ( -6.5)
Lowest grass min -7.0 (-1.9) Gales 2 >=1.0 mm 5 ( -6.4)
No. days <0.0C 16 (+5.5) Fog (at 09GMT) 2 >=5.0 mm 3 ( -1.7)
Mean soil 30cm 7.7 (+0.7)
Lysimeter:
Highest maximum 17.4C (+2.0) on 28th. Lowest minimum -1.5 (-0.2) on 14th. PE 22.9 mm
Minimum relative humidity: 47% on 14,28th. No. days at 30 cm >=5.6C 31; days <5.6C 0 PWB 28.4 mm
* Mean max of 12.3C was warmest in March on 25y record. The 17.4C on the 28th PWS 45.4 mm
* was ranked only 5th highest (20.5 in 1997). Mean min of 3.9C was close to average. PWD -17.0 mm
* With 51.3 mm rain it was the 29th driest March on record since 1928. Without the
* 15.8 mm on the 31st it would have been 12th! Both 2001 & 2002 were drier. Piche: 47.4 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR APRIL 2003
---------------------------------------------------------------------------------------------------------------------------
-09GMT--> ---Air Temperature--- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp Dpt RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C GrSS Rain SLHTGF Press hrs hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 8 SW 4 6 21 8.1 7.7 97 11.7 6.9 6.0 8.8 9.0 9.3 9.6 9.5 9.2 2 2 3 0 1.9 004000 1006 1.1 0.0 0.7
02 5 N 3 7 05 8.2 4.3 77 12.1 3.5 -0.4 8.2 7.7 8.2 9.2 9.4 9.2 1 2 4 0 0.2 004000 1018 0.0 0.0 1.1
03 3 N 3 6 10 8.8 8.0 95 12.6 5.0 0.3 9.2 9.0 9.0 9.5 9.5 9.3 1 2 3 0 tr/fg 000000 1029 0.0 0.0 0.8
04 7 SW 1 3 42 8.5 8.3 99 15.8 6.3 1.9 9.8 9.5 9.8 10.1 10.0 9.3 1 0 2 0 0.0 000001 1034 0.0 0.0 1.0
05 1 SW 1 7 04 9.7 8.3 91 16.6 3.9 -0.7 9.0 8.5 9.8 10.3 10.1 9.5 1 0 1 0 0.0 000000 1035 0.0 0.0 1.1
06 2 NE 2 5 10 9.3 8.1 92 14.1 3.8 -1.0 11.0 9.5 10.0 10.8 10.5 9.8 0 0 2 0 0.0 000002 1032 0.0 0.0 0.9
07 8 N 2 4 05 7.5 6.0 90 8.7 5.9 2.8 9.8 10.1 10.5 10.9 10.7 9.8 0 0 1 0 0.0 000000 1027 0.0 0.0 0.9
08 0 SE 1 7 04 6.6 1.7 71 11.5 1.1 -2.7 6.9 6.5 8.2 9.8 10.2 10.0 0 0 4 0 0.0 000000 1026 0.0 0.0 1.9
09 7 E 2 7 05 7.5 1.3 65 11.2 1.0 -3.3 8.0 7.5 8.5 9.8 10.1 10.0 0 0 4 0 0.0 000000 1019 0.0 0.0 2.0
10 1 E 2 7 02 4.7 -3.0 57 8.4 -1.3 -6.0 6.0 5.8 8.0 9.5 10.0 10.0 0 0 4 0 0.0 000000 1014 0.0 6.5 1.3
11 7 SW 2 7 05 7.0 2.9 75 11.9 2.9 -0.7 8.6 8.4 9.0 9.8 10.0 10.0 0 0 4 0 0.0 000000 1009 0.0 0.0 1.6
12 6 NE 1 6 04 8.3 2.9 69 12.0 4.6 0.0 9.5 9.1 9.6 10.0 10.0 10.0 0 0 1 0 0.0 000000 1012 0.0 0.0 2.0
13 7 SE 3 7 04 11.7 5.5 66 15.7 4.3 -0.9 8.4 8.7 9.1 10.0 10.0 10.0 0 0 4 0 3.3 000000 1013 4.6 0.0 2.7
14 8 SE 2 7 03 14.1 7.9 66 23.0 9.6 8.5 12.0 11.0 10.7 10.4 10.4 10.0 1 1 3 0 tr 000000 1007 0.0 0.0 3.0
15 6 S 1 7 06 16.8 9.1 61 23.2 10.3 4.8 12.3 11.5 11.2 11.4 10.8 10.0 1 0 1 0 0.0 000000 1014 0.0 0.0 2.8
16 0 S 1 7 06 19.0 8.5 50 25.3 10.0 7.5 13.7 12.0 12.0 12.2 11.4 10.1 0 0 1 0 0.0 000000 1020 0.0 0.0 3.9
17 0 NE 3 5 04 14.3 8.4 67 23.7 9.9 5.5 12.3 11.7 12.5 12.8 12.0 10.4 0 0 1 0 0.0 000000 1026 0.0 0.0 3.7
18 0 NE 4 5 04 11.7 6.4 69 16.7 8.5 5.4 11.8 11.8 12.8 12.9 12.3 10.8 0 0 0 0 0.0 000000 1031 0.0 0.0 3.3
19 3 NE 5 7 05 8.8 3.7 71 12.7 6.5 4.0 11.0 10.8 12.0 12.8 12.4 11.0 0 0 0 0 0.0 000000 1025 0.0 0.0 2.4
20 7 E 4 6 05 8.0 4.4 78 12.3 6.7 5.8 11.3 11.1 11.8 12.2 12.3 11.3 0 0 0 0 6.8 000000 1014 2.5 0.0 1.4
21 8 NE 1 5 10 7.4 7.0 97 11.3 5.6 1.9 9.5 9.9 11.0 11.8 12.0 11.2 1 2 3 0 2.3 000000 1006 1.3 0.0 0.8
22 7 SW 4 7 05 9.7 6.5 80 13.2 6.4 4.4 11.7 10.5 10.8 11.5 11.8 11.3 1 0 3 0 0.0 000000 1012 0.0 0.0 1.6
23 0 NE 1 6 05 10.9 7.4 79 14.2 3.9 1.3 8.4 8.5 10.1 11.3 10.7 11.2 1 0 1 0 0.0 000000 1017 0.0 0.0 2.7
24 7 E 2 7 05 13.3 3.6 52 15.1 8.7 4.9 11.7 10.6 11.1 12.2 12.0 11.5 0 0 0 0 3.6 000000 1011 5.6 0.0 1.0
25 8 SE 1 6 60 10.8 9.2 90 14.7 6.9 3.8 10.7 10.6 11.0 11.5 11.7 11.2 1 3 3 0 0.6 000000 1006 3.3 0.0 1.8
26 6 S 1 7 01 11.0 6.6 74 13.0 8.2 6.5 10.0 9.5 10.2 11.3 11.7 11.2 1 0 3 0 6.2 000000 999 4.5 0.0 1.8
27 7 SW 5 6 10 10.3 9.7 96 14.2 6.3 4.9 10.8 10.2 10.7 11.3 11.5 11.1 1 2 3 0 17.4 000000 997 8.0 0.0 1.4
28 8 S 6 7 02 12.3 9.8 90 12.4 8.5 8.0 11.5 11.3 11.3 11.9 11.8 11.3 1 2 3 0 3.2 000000 983 4.0 0.0 0.4
29 7 SW 5 7 01 10.9 9.7 92 14.5 8.0 6.4 12.0 11.0 11.0 11.5 11.6 11.2 1 2 3 0 17.8 000000 1000 5.8 0.0 1.9
30 7 SW 3 6 80 10.0 7.9 87 14.2 7.8 6.2 10.7 10.5 11.0 11.8 11.7 11.2 1 3 3 0 3.3 004000 1001 2.1 0.0 1.1
------------------------------------------------------------------------------------------------------------------
Mean
5 10.2 6.3 78 14.5 6.0 2.8 10.2 9.7 10.3 11.0 10.9 10.4 1015
Total 66.6 42.8 6.5 53.0
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1993-2002 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (89%) [115%] and
Mean maximum 14.5 (+2.2) [+1.7] Sleet/snow falling 0 (-2.1) 107% of 1928-2002 average.
Mean minimum 6.0 (+0.9) [+1.6] Snow lying (at 09GMT) 0 (-0.2) Most in a day: 17.8 mm on 29th
Mean 10.3 (+1.6) [+1.7] Hail <5 mm 3 {-0.4} No. days:
No. days <0.0C 1 (+0.4) Hail >=5 mm 0 {all types} 0.0 mm 16 (+ 6.8)
Mean grass min 2.8 (-0.2) Thunder heard 0 (-0.2) >=0.2 mm 12 (- 4.9)
Lowest grass min -6.0 (-2.7) Gales 0 >=1.0 mm 10 (- 3.8)
No. days <0.0C 8 (+1.5) Fog (at 09GMT) 0 >=5.0 mm 4 (- 1.8)
Mean soil 30cm 11.0 (+1.4)
Lysimeter:
Highest maximum 25.3C (+7.9) on 16th. Lowest minimum -1.3 (-1.0) on 10th. PE 50.1 mm
Minimum relative humidity: 44% on 17th. No. days at 30 cm >=5.6C 30; days <5.6C 0. PWB 16.5 mm
* Max on 14-17th all >23C with the 25.3C on the 16th warmest in April on record. PWS 47.6 mm
* Mean max 14.5 ranked 4th, mean min 6.0 ranked joint 3rd. Mean 10.3C ranks 2nd PWD -31.1 mm
* only to 1987 that had 10.6C. Daily mean 14-17th all warmest on April record, wi
* 17.6C on the 16th the highest. Mean soil at 30cm 11.0C warmest on record. Piche: 53.0 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR MAY 2003
---------------------------------------------------------------------------------------------------------------------------
-09GMT--> ---Air Temperature--- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp Dpt RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C GrSS Rain SLHTGF Press hrs hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 7 SW 4 7 80 10.0 8.6 91 14.1 8.5 8.0 11.9 11.2 11.2 11.9 11.8 11.2 1 3 3 0 5.8 000000 1006 5.4 0.0 1.3
02 8 SE 4 5 61 8.2 8.0 99 9.5 7.1 3.7 10.0 10.3 11.1 11.9 12.0 11.2 1 3 3 0 17.2 000000 997 6.0 0.0 0.3
03 7 S 4 7 03 9.5 6.5 82 12.2 3.9 -0.4 8.7 8.4 9.6 11.0 11.6 11.5 1 1 4 0 26.5 000000 1012 9.6 0.0 1.3
04 8 S 6 7 02 12.2 7.3 72 15.2 9.5 8.7 12.0 11.2 10.9 11.2 11.4 11.3 2 0 0 0 11.4 000000 1003 10.0 0.0 1.8
05 8 NW 2 7 80 6.9 6.7 97 13.0 6.5 6.8 10.2 10.4 10.9 11.2 11.3 11.2 1 2 3 0 0.0 000000 1006 0.0 0.0 1.7
06 3 NW 3 7 03 11.2 6.8 74 14.0 5.0 0.7 11.1 9.6 10.5 11.8 11.8 11.2 1 0 1 0 1.7 000000 1021 1.7 0.0 1.9
07 7 S 2 7 03 11.7 9.3 85 13.5 7.3 3.9 12.5 11.4 11.7 12.2 12.0 11.3 1 1 3 0 0.3 000000 1024 0.3 0.0 1.1
08 2 W 4 7 05 11.5 6.0 69 15.7 7.5 4.1 12.3 10.7 11.2 12.1 12.0 11.4 1 0 3 0 0.0 000000 1019 0.0 0.0 2.2
09 6 W 5 8 03 11.1 6.2 72 13.8 5.5 2.8 12.2 11.0 12.0 12.4 12.3 11.5 0 0 1 0 0.5 000000 1016 0.9 0.0 1.8
10 2 SW 2 8 01 10.8 3.6 61 15.0 3.3 0.5 11.7 10.1 11.0 12.3 12.4 11.5 0 0 1 0 0.4 000000 1017 0.4 0.0 2.5
11 6 SW 4 8 80 11.1 6.4 73 13.8 8.3 6.8 13.9 12.3 12.2 12.8 12.5 11.8 0 1 3 0 4.3 004000 1014 1.6 0.0 1.8
12 5 W 3 7 02 8.7 4.7 77 13.7 5.7 3.4 10.7 10.5 11.5 12.6 12.6 11.8 1 0 4 0 0.5 004000 1011 0.2 0.0 2.0
13 7 NW 4 7 05 10.0 6.4 78 14.0 4.6 1.6 12.0 10.8 11.5 12.6 12.6 12.0 1 0 4 0 0.1 000000 1014 0.0 0.0 1.6
14 6 NW 3 7 03 9.5 5.3 75 14.3 5.1 1.9 12.4 11.2 11.8 12.9 12.8 12.0 0 0 1 0 0.0 000000 1023 0.0 0.0 1.6
15 5 SW 2 8 03 11.5 4.2 61 17.6 4.6 0.6 12.0 10.5 11.5 12.8 12.8 12.0 0 0 1 0 16.8 000000 1022 10.8 0.0 1.8
16 8 S 3 7 21 10.5 8.7 88 13.3 8.9 7.7 11.9 12.1 12.8 13.2 12.8 12.1 1 2 3 0 0.9 000000 1006 2.7 0.0 1.1
17 8 S 2 5 60 11.5 10.5 94 12.2 10.3 9.7 12.5 12.3 12.5 13.0 13.0 12.2 1 3 3 0 7.7 000000 1001 6.4 0.0 0.7
18 6 SW 6 6 01 12.2 9.5 83 14.5 10.1 9.5 13.4 12.2 12.2 12.8 12.8 12.2 1 2 3 0 1.1 000000 1001 0.6 0.0 2.4
19 5 S 5 7 05 11.5 7.4 76 13.6 9.0 7.6 13.0 11.8 12.0 13.0 12.8 12.0 1 0 3 0 11.2 000000 1002 9.8 0.0 1.1
20 8 W 5 7 02 10.6 8.6 87 12.5 7.5 6.8 11.5 11.2 11.7 12.7 12.8 12.2 1 2 3 0 3.3 000000 1010 2.0 0.0 0.5
21 8 SW 3 7 05 11.3 8.9 85 12.2 9.2 7.3 13.0 12.3 12.0 12.7 12.6 12.2 1 0 3 0 27.8 000000 1020 18.5 0.0 0.3
22 8 SW 2 4 65 11.7 11.5 99 12.5 11.2 10.8 12.4 12.4 12.4 12.8 12.6 12.2 2 3 3 0 6.3 000000 1017 5.3 0.0 0.7
23 6 SW 5 7 05 11.5 9.7 89 14.5 9.9 9.5 13.8 12.5 12.1 12.7 12.6 12.2 1 0 3 0 0.9 000000 1006 1.8 0.0 1.3
24 6 NW 2 7 02 11.5 9.5 88 15.6 9.2 7.3 14.2 13.2 13.0 13.3 12.8 12.1 1 1 3 0 1.2 000000 1005 1.2 0.0 1.0
25 8 NW 2 7 05 11.2 9.8 91 17.2 9.2 8.6 14.0 13.5 13.2 13.8 13.3 12.2 1 1 3 0 0.0 000000 1015 0.0 0.0 1.4
26 7 SW 3 8 01 12.2 7.7 74 15.6 7.6 5.0 14.0 13.3 13.5 14.1 13.6 12.5 0 0 1 0 2.1 000000 1020 4.9 0.0 1.7
27 8 SW 2 5 50 13.0 12.4 96 18.2 11.4 10.8 15.0 14.5 14.0 14.3 13.8 12.5 1 3 3 0 0.1 000000 1023 0.0 0.0 0.9
28 7 S 1 7 01 13.1 11.0 87 20.5 10.2 9.0 15.1 14.3 14.0 14.6 14.0 12.8 1 1 3 0 0.2 000000 1024 0.0 0.0 1.6
29 7 NE 2 7 01 15.8 13.7 87 21.2 11.8 10.2 19.0 16.3 15.3 15.3 14.4 13.1 0 0 3 0 0.0 000000 1020 0.0 0.0 2.3
30 0 E 1 5 04 21.2 16.6 75 24.8 14.0 11.5 20.2 17.2 16.3 16.3 15.0 13.2 1 1 1 0 0.0 000001 1016 0.0 0.0 1.8
31 8 SW 4 4 42 14.7 13.8 94 18.0 13.0 10.9 17.2 17.0 17.0 17.0 15.6 13.5 0 0 2 0 tr 000000 1013 0.0 0.0 1.6
------------------------------------------------------------------------------------------------------------------
Mean
6 11.5 8.6 83 15.0 8.2 6.3 13.0 12.1 12.3 13.0 12.8 12.0 1013
Total 148.3 100.1 0.0 45.1
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1993-2002 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (229%) [258%] and
Mean maximum 15.0 (-0.5) [-1.0] Sleet/snow falling 0 (-0.3) 232% of 1928-2002 average.
Mean minimum 8.2 (+0.5) [+1.2] Snow lying (at 09GMT) 0 (-0.1) Most in a day: 27.8 mm on 21st
Mean 11.6 ( 0.0) [+0.1] Hail <5 mm 2 {+0.6} No. days:
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 {all types} 0.0 mm 6 (-7.3)
Mean grass min 6.3 (+0.4) Thunder heard 0 (-0.9) >=0.2 mm 22 (+8.3)
Lowest grass min -0.4 (-0.3) Gales 0 >=1.0 mm 15 (+4.7)
No. days <0.0C 1 (-0.2) Fog (at 09GMT) 0 >=5.0 mm 9 (+4.6)
Mean soil 30cm 13.0 (-0.3)
Lysimeter:
Highest maximum 24.8C (+1.6) on 30th. Lowest minimum 3.3 (+0.2) on 10th. PE 50.7 mm
Minimum relative humidity: 46% on 15th. No. days at 30 cm >=5.6C 31; days <5.6C 0. PWB 97.4 mm
* Wettest May on record since 1928. PWS 116.8 mm
* Maximum of 24.8C on 30th ranked 5th warmest in May on 25-y record. PWD -19.4 mm
* Minimum of 14.0C on 30th ranked 3rd warmest in May on 25-y record.
* Piche: 45.1 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JUNE 2003
---------------------------------------------------------------------------------------------------------------------------
-09GMT--> ---Air Temperature--- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp Dpt RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C GrSS Rain SLHTGF Press hrs hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 5 S 3 7 05 15.6 11.8 78 21.4 9.9 7.0 17.8 15.9 16.0 16.4 15.8 14.8 0 0 1 0 3.8 000000 1008 3.8 0.0 2.1
02 7 S 4 7 25 14.3 11.1 81 17.5 10.3 9.4 17.6 16.3 16.1 16.8 16.0 14.0 1 1 3 0 tr 000000 1006 0.0 0.0 1.9
03 7 SE 1 7 02 14.3 10.3 77 18.8 10.5 8.1 15.1 15.0 15.4 16.1 15.8 14.0 0 0 1 0 0.0 000000 1007 0.0 0.0 2.1
04 8 S 1 7 03 13.5 9.2 75 14.1 9.9 8.4 15.0 14.2 14.7 15.6 15.4 14.2 0 0 1 0 5.8 000000 1008 7.2 0.0 0.5
05 7 SW 3 7 01 12.5 10.6 88 15.7 10.4 10.0 13.8 13.8 14.5 15.2 15.1 14.1 1 0 3 0 1.6 000000 1015 2.8 0.0 2.6
06 8 S 5 6 10 13.6 13.2 98 16.8 12.2 11.2 14.3 14.3 14.6 15.1 15.0 14.2 1 2 3 0 0.0 000000 1012 0.0 0.0 1.5
07 3 S 5 7 05 14.9 9.7 71 18.6 10.5 8.2 15.2 13.5 14.0 15.1 15.0 14.1 1 0 1 0 4.9 000000 1013 6.1 0.0 2.3
08 8 SW 2 6 10 12.6 12.0 96 17.3 11.1 9.0 15.2 15.0 15.2 15.6 15.3 14.0 1 3 3 0 0.1 000000 1008 0.0 0.0 1.4
09 8 S 2 7 05 13.9 9.7 73 17.8 10.5 9.1 15.1 14.3 14.8 15.8 15.3 14.2 1 0 1 0 2.7 000000 1016 6.6 0.0 2.3
10 6 S 5 6 81 15.8 12.9 83 17.2 12.2 10.6 16.2 15.3 15.1 15.7 15.2 14.2 1 1 3 0 0.9 000000 1003 0.2 0.0 1.9
11 6 SW 3 7 05 14.6 10.6 77 18.0 11.0 10.0 17.2 15.0 15.1 16.0 15.5 14.2 1 0 1 0 0.1 000000 1015 0.0 0.0 2.0
12 5 SW 4 7 01 14.8 10.0 73 17.8 11.3 9.5 17.2 15.4 15.6 16.6 15.8 14.4 0 0 3 0 0.0 000000 1017 0.0 0.0 1.8
13 5 SW 2 7 05 15.3 10.0 71 19.2 10.1 7.3 17.8 15.7 16.0 16.7 16.1 14.7 0 0 1 0 0.0 000000 1024 0.0 0.0 2.2
14 2 NE 1 7 05 17.5 12.7 73 20.2 11.3 9.7 20.0 17.3 17.0 17.2 16.5 14.8 0 0 1 0 0.0 000000 1024 0.0 0.0 1.7
15 6 N 1 7 05 17.0 13.3 79 18.5 10.5 6.7 20.1 17.7 17.4 17.7 16.9 15.0 0 0 1 0 0.0 000000 1024 0.0 0.0 1.5
16 1 NE 1 7 04 17.4 12.4 72 23.9 9.7 5.8 19.8 16.5 16.5 17.3 16.8 15.0 0 0 1 0 0.0 000000 1017 0.0 0.0 2.1
17 6 NW 1 5 06 16.0 13.3 84 21.0 12.9 10.8 19.3 18.6 18.5 18.2 17.2 15.1 0 0 1 0 4.1 000000 1012 3.5 0.0 1.7
18 8 S 5 5 63 14.4 14.0 98 16.2 11.7 9.7 16.0 16.4 17.2 17.8 17.2 15.2 1 3 3 0 5.3 000000 1014 1.1 0.0 0.3
19 8 SW 3 4 10 14.5 14.0 97 19.0 13.0 12.3 16.6 16.6 16.4 17.0 16.8 15.2 1 0 2 0 tr 000001 1019 0.0 0.0 1.3
20 6 W 3 7 01 14.2 8.5 68 16.9 8.5 5.3 17.5 15.5 15.8 16.6 16.5 15.5 0 0 1 0 tr 000000 1023 0.0 0.0 1.7
21 8 00 0 7 05 15.3 12.4 70 20.6 9.5 6.0 17.4 15.7 15.8 16.6 16.5 15.3 0 0 1 0 0.7 000000 1021 3.0 0.0 1.3
22 5 S 3 6 01 20.4 14.6 70 21.0 12.7 10.4 19.5 17.0 16.5 16.9 16.5 15.3 0 0 3 0 tr 000000 1004 0.0 0.0 1.1
23 7 NW 2 7 01 15.3 11.8 80 18.8 12.3 9.8 18.8 17.3 16.9 17.1 16.5 15.2 0 0 0 0 0.0 000000 1008 0.0 0.0 1.7
24 7 NW 1 7 01 14.7 10.3 75 19.2 12.2 11.4 18.3 17.6 17.2 17.4 16.8 15.2 0 0 1 0 0.0 000000 1020 0.0 0.0 1.6
25 6 NE 1 7 04 18.0 13.6 76 23.2 9.3 7.0 19.2 16.4 16.4 17.2 17.0 15.4 0 0 1 0 0.5 000000 1020 0.4 0.0 1.8
26 7 S 1 6 04 19.5 15.3 77 22.4 13.8 11.6 20.5 18.8 18.2 18.2 17.2 15.5 0 1 3 0 8.1 000000 1017 6.2 0.0 1.1
27 8 S 2 5 63 15.0 14.5 97 17.5 14.4 13.5 17.5 17.7 18.2 18.2 17.4 15.6 1 3 3 0 1.1 000000 1015 2.3 0.0 0.6
28 8 W 1 7 02 14.0 11.0 82 17.6 10.4 6.4 16.6 16.0 16.5 17.4 17.2 16.0 1 0 3 0 0.0 000000 1016 0.0 0.0 1.7
29 5 E 2 7 05 17.6 11.8 69 20.2 11.9 10.7 19.4 16.9 16.6 17.5 17.2 15.8 1 0 1 0 20.5 000000 1010 7.5 0.0 3.3
30 8 NE 1 5 63 13.0 13.0 100 17.2 12.5 11.3 15.6 16.3 17.5 18.2 17.6 15.9 1 3 3 0 8.8 000002 1002 6.0 0.0 0.4
------------------------------------------------------------------------------------------------------------------
Mean
6 15.3 11.9 80 18.8 11.2 9.2 17.3 16.1 16.2 16.8 16.3 14.9 1014
Total 69.0 56.7 0.0 49.5
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1993-2002 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (95%) [104%] and
Mean maximum 18.8 (+1.7) [+1.1] Sleet/snow falling 0 ( 0.0) 97% of 1928-2002 average.
Mean minimum 11.2 (+1.3) [+1.7] Snow lying (at 09GMT) 0 ( 0.0) Most in a day:
Mean 15.0 (+1.5) [+1.4] Hail <5 mm 0 {-0.3} No. days:
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 {all types} 0.0 mm 10 (- 1.6)
Mean grass min 9.2 (+0.8) Thunder heard 0 (-0.8) >=0.2 mm 14 (- 1.2)
Lowest grass min 5.3 (+2.4) Gales 0 >=1.0 mm 11 (+ 0.5)
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 0 >=5.0 mm 5 (+ 0.4)
Mean soil 30cm 16.8 (+1.3)
Lysimeter:
Highest maximum 23.9C (-1.3) on 16th Lowest minimum 8.5 (+3.0) on 20th. PE 64.5 mm
Minimum relative humidity: 54% on 16th. No. days at 30 cm >=5.6C 30; days <5.6C 0 PWB 4.5 mm
* Mean max 18.8C ranked only 6th warmest on record since 1979, 1988 & 1992 had 20.0C. PWS 37.2 mm
* But mean min 11.2C was warmest on record, previous highest was 10.8C in 1982. PWD -32.7 mm
* The mean 15.0C ranks 3rd warmest against 15.2C in 1992 and tying with 1982.
* Was just 0.2 mm wetter than June 2002. Piche: 49.5 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JULY 2003
---------------------------------------------------------------------------------------------------------------------------
-09GMT--> ---Air Temperature--- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp Dpt RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C GrSS Rain SLHTGF Press hrs hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 8 N 1 4 61 13.0 13.0 100 16.5 9.2 7.3 15.5 15.6 16.5 17.3 17.2 16.0 1 3 3 0 1.7 000001 1000 2.7 0.0 0.4
02 7 N 1 7 05 14.0 12.7 92 20.0 12.0 10.2 16.0 15.8 16.1 17.2 17.0 16.0 1 1 3 0 tr 000000 1008 0.0 0.0 1.3
03 8 N 1 7 02 13.6 11.2 85 15.9 10.7 8.4 16.5 16.2 16.7 17.4 17.1 15.9 1 0 3 0 0.1 000000 1013 0.0 0.0 0.7
04 8 00 0 6 10 13.0 12.3 95 14.9 12.2 12.2 16.0 16.0 16.5 17.1 17.0 16.8 1 3 3 0 tr 000000 1018 0.0 0.0 0.6
05 8 NW 1 7 05 14.5 11.7 83 16.0 11.8 11.4 16.8 16.0 16.1 16.8 16.8 15.8 1 0 3 0 0.0 000000 1020 0.0 0.0 1.3
06 8 SW 2 7 05 14.9 10.8 76 19.2 12.0 11.4 16.3 16.0 16.1 16.8 16.8 15.8 0 0 0 0 0.0 000000 1021 0.0 0.0 2.2
07 7 S 4 7 01 15.7 12.8 83 19.8 13.5 12.5 16.9 16.7 16.7 17.1 16.8 16.8 0 0 0 0 0.3 000000 1020 0.4 0.0 2.0
08 8 S 1 5 10 16.7 15.9 95 20.7 14.2 14.2 18.7 17.8 17.8 17.7 17.2 15.9 0 0 2 0 0.0 000001 1020 0.0 0.0 1.6
09 3 S 4 7 05 18.9 16.2 85 21.7 14.8 12.2 20.0 17.9 18.0 18.0 17.3 16.0 0 0 1 0 tr 000000 1022 0.0 0.0 2.3
10 8 S 5 5 51 16.5 16.5 100 17.9 16.5 14.9 18.6 18.9 19.0 18.5 17.8 16.0 1 3 3 0 0.3 000000 1016 0.3 0.0 0.7
11 7 W 5 7 05 15.0 10.7 75 16.8 10.8 7.3 17.8 16.5 16.8 17.6 17.6 16.0 0 0 1 0 0.0 000000 1020 0.0 0.0 1.4
12 5 S 2 7 05 16.0 8.8 62 22.1 10.5 6.8 18.2 16.3 16.5 17.2 17.2 16.2 0 0 1 0 0.0 000000 1023 0.0 0.0 2.2
13 0 NE 1 7 04 18.5 14.7 79 23.3 11.0 7.8 19.9 17.3 17.5 17.8 17.8 16.1 0 0 1 0 0.0 000000 1020 0.0 0.0 2.4
14 0 NE 1 7 04 23.3 15.9 63 31.2 15.8 11.2 22.0 19.5 19.2 18.8 18.8 16.2 0 0 1 0 tr 000000 1014 0.0 0.0 4.0
15 6 E 1 7 04 22.8 18.0 75 27.7 18.5 15.0 23.8 21.7 20.8 20.0 18.5 16.4 0 0 0 0 0.0 000000 1010 0.0 0.0 3.5
16 6 NE 2 7 05 23.4 17.0 67 26.5 18.9 15.6 24.3 21.8 21.0 20.3 19.2 16.6 0 0 0 0 1.7 000T00 1006 0.5 0.0 2.2
17 8 S 1 4 10 17.7 17.2 97 17.7 15.5 14.5 20.5 20.5 21.0 20.4 19.3 16.8 1 1 3 0 6.2 000t00 1008 8.6 0.0 0.3
18 5 SW 5 8 01 16.3 11.1 71 22.4 12.4 10.8 18.7 17.3 18.0 19.1 18.9 17.1 1 0 3 0 0.0 000000 1015 0.0 0.0 3.3
19 8 S 5 7 05 18.8 14.7 77 21.8 16.3 15.6 19.0 18.7 19.0 19.5 18.8 17.0 0 0 0 0 5.9 000000 1012 3.5 0.0 2.5
20 7 S 4 7 25 16.5 14.6 89 18.9 13.6 12.2 18.6 17.6 18.0 19.0 18.8 17.2 1 2 3 0 5.1 000000 1009 2.2 0.0 1.1
21 6 SW 5 7 01 15.6 13.7 88 20.2 13.3 12.3 17.0 16.8 17.5 18.5 18.5 17.1 1 0 3 0 0.0 000000 1008 0.0 0.0 2.2
22 6 SW 2 6 05 16.5 13.5 82 20.6 14.2 13.2 16.9 17.0 17.9 18.7 18.2 17.0 1 0 1 0 tr 000000 1014 0.0 0.0 2.2
23 7 S 5 7 07 16.8 13.5 81 19.0 13.7 13.1 17.3 17.3 18.0 18.5 18.4 17.0 0 0 0 0 0.2 000000 1011 0.3 0.0 1.4
24 7 SW 4 7 05 15.7 11.5 76 20.1 12.7 11.7 18.0 17.2 17.5 18.3 18.2 17.0 0 0 3 0 12.7 000000 1001 14.0 0.0 1.3
25 8 SW 1 6 10 14.6 14.4 99 17.9 14.1 14.0 16.8 17.0 17.8 18.3 18.1 17.0 1 2 3 0 0.3 000000 1003 0.1 0.0 1.1
26 6 SW 2 6 02 15.6 14.2 90 18.6 13.0 11.3 17.6 16.8 17.0 18.0 17.9 17.0 1 2 3 0 tr 000000 1005 0.0 0.0 1.1
27 6 SW 2 7 01 15.3 11.8 80 19.8 11.0 7.5 17.0 16.4 17.0 17.8 17.8 17.0 1 0 1 0 0.0 000000 1010 0.0 0.0 2.4
28 6 S 5 7 05 16.7 12.4 76 18.2 12.8 10.9 17.0 16.3 17.0 18.0 18.0 17.0 0 0 0 0 1.8 000000 1014 3.5 0.0 1.2
29 8 S 5 7 02 15.6 12.7 83 17.5 14.5 14.0 17.0 16.8 17.1 17.8 17.7 16.8 1 0 3 0 10.4 000t03 1015 10.6 0.0 0.4
30 8 NE 2 5 10 14.5 14.3 99 18.7 13.8 13.5 16.8 16.5 17.8 17.5 17.5 16.8 1 2 3 0 3.1 000002 1015 4.2 0.0 0.8
31 8 S 4 7 10 14.1 13.2 94 16.5 12.8 10.1 15.8 16.0 16.8 17.4 17.5 16.6 1 3 3 0 0.3 000000 1014 0.4 0.0 1.0
------------------------------------------------------------------------------------------------------------------
Mean
6 16.5 13.6 84 19.9 13.4 11.7 18.1 17.4 17.7 18.1 17.9 16.5 1013
Total 50.1 51.3 0.0 51.1
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1993-2002 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (89%) but [64%]
Mean maximum 19.9 (+0.8) [+0.4] Sleet/snow falling 0 ( 0.0) and 67% of 1928-2002 average.
Mean minimum 13.4 (+1.5) [+1.7] Snow lying (at 09GMT) 0 ( 0.0) Most in a day: 12.7 mm on 24th
Mean 16.7 (+1.2) [+1.1] Hail <5 mm 0 {-0.1} No. days:
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 {all types} 0.0 mm 10 (- 1.6)
Mean grass min 11.7 (+1.4) Thunder heard 3 (+2.4) >=0.2 mm 14 (- 0.7)
Lowest grass min 6.8 (+1.4) Gales 0 >=1.0 mm 9 (- 2.5)
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 0 >=5.0 mm 5 (- 0.5)
Mean soil 30cm 18.1 (+0.8)
Lysimeter:
Highest maximum 31.2C (+6.4) on 14th. Lowest minimum 9.2 (+1.3) on 1st. PE 50.8 mm
Minimum relative humidity: 41% on 14th. No. days at 30 cm >=5.6C 31; days <5.6C nil. PWB -0.7 mm
* Abs maximum on 14th of 31.2C was highest in July on record (1979). It was also PWS 33.8 mm
* the 2nd highest of any month (33.0C on 2 August 1990). PWD -34.5 mm
* Rainfall was below average, particularly on the longer-term, and was ranked 25th driest since 1928.
* Piche: 51.1 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR AUGUST 2003
---------------------------------------------------------------------------------------------------------------------------
-09GMT--> ---Air Temperature--- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp Dpt RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C GrSS Rain SLHTGF Press hrs hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 7 SW 1 6 10 15.6 14.6 94 21.0 14.0 13.3 16.7 16.5 16.9 17.3 17.3 16.6 1 0 3 0 0.0 000000 1014 0.0 0.0 1.8
02 6 SW 2 7 05 16.3 13.3 82 20.1 11.9 8.9 17.5 16.8 17.0 17.8 17.6 16.5 1 0 1 0 0.0 000000 1021 0.0 0.0 2.3
03 3 S 2 7 05 17.3 12.5 73 22.2 11.8 8.8 18.0 16.2 16.9 17.9 17.7 16.6 0 0 1 0 0.0 000000 1023 0.0 0.0 2.3
04 1 NE 1 7 04 19.8 15.1 74 28.3 11.8 9.2 19.8 17.3 17.8 18.4 18.0 16.8 0 0 1 0 tr 000000 1024 0.0 0.0 2.7
05 4 SE 1 7 04 28.3 19.8 60 31.7 17.5 16.1 23.2 20.7 20.0 19.5 18.5 16.9 0 1 3 0 tr 000t00 1020 0.0 0.0 2.8
06 9 SW 2 5 10 19.2 17.2 88 21.6 15.7 13.9 21.0 20.2 20.0 20.0 18.9 17.0 0 0 2 0 0.0 000002 1020 0.0 0.0 0.8
07 9 S 1 4 04 19.5 17.9 90 20.9 15.0 12.1 20.2 19.2 19.2 19.4 18.8 17.2 0 0 2 0 tr/fg 000002 1024 0.0 0.0 0.6
08 4 NE 1 4 10 19.3 18.8 97 25.1 15.7 14.2 21.8 19.8 19.3 19.5 18.8 17.2 0 0 2 0 0.0 000001 1021 0.0 0.0 1.9
09 2 SE 2 5 04 26.0 19.4 67 29.8 17.7 14.0 21.2 20.3 20.3 20.2 19.5 17.4 0 0 1 0 1.0 000000 1019 0.6 0.0 2.1
10 8 NE 2 2 42 16.6 16.6 100 17.7 15.9 13.8 20.0 20.5 21.0 20.3 19.5 17.6 1 2 3 0 tr 000002 1019 0.0 0.0 1.0
11 7 N 1 7 05 16.2 13.7 85 19.3 13.6 10.8 18.2 18.0 18.8 19.5 19.2 17.7 0 0 1 0 0.0 000t00 1021 0.0 0.0 1.4
12 7 N 1 5 05 17.5 16.0 91 20.6 11.9 8.8 19.0 18.2 18.5 19.3 19.0 17.8 0 0 1 0 0.4 000000 1022 0.5 0.0 1.2
13 7 W 2 7 05 17.0 14.6 86 22.4 13.5 9.9 18.5 18.0 18.5 19.0 19.0 18.8 0 1 3 0 0.7 000000 1022 0.5 0.0 1.4
14 5 N 2 7 05 14.7 12.1 85 17.8 9.4 5.4 15.8 15.8 17.5 18.6 18.8 17.8 0 0 1 0 tr/fg 000000 1022 0.0 0.0 1.4
15 5 N 1 7 05 15.6 13.3 86 18.0 10.1 8.0 17.5 16.5 17.8 18.5 18.6 17.6 0 0 2 0 0.0 000002 1020 0.0 0.0 1.4
16 2 NE 1 7 04 16.7 12.8 78 21.7 10.6 8.5 17.5 16.7 17.8 18.3 18.5 17.6 0 0 1 0 0.0 000000 1020 0.0 0.0 1.8
17 7 SE 2 7 05 19.5 11.6 60 22.5 13.4 10.5 19.7 18.7 18.8 18.8 18.5 17.5 0 0 0 0 0.8 000000 1015 2.0 0.0 2.3
18 7 W 1 7 10 14.5 13.8 96 20.6 12.8 12.5 17.8 18.0 18.6 18.6 18.5 17.5 1 2 3 0 0.0 000000 1012 0.0 0.0 1.9
19 7 W 2 7 01 14.7 11.4 78 20.1 12.3 9.4 17.4 17.5 18.3 18.5 18.4 17.5 0 0 0 0 0.0 000000 1020 0.0 0.0 2.0
20 4 SW 2 8 01 14.0 11.0 82 18.5 12.0 9.6 15.8 16.8 18.2 18.3 18.4 17.5 0 0 1 0 tr 000000 1021 0.0 0.0 2.0
21 6 S 6 7 02 16.2 13.2 82 18.5 13.9 12.6 17.0 17.0 17.8 18.0 18.2 17.3 0 0 0 0 1.0 000000 1013 2.5 0.0 1.4
22 8 S 1 5 10 15.5 14.6 95 19.0 15.2 14.8 17.7 17.5 18.0 17.9 18.0 17.2 1 2 3 0 2.2 000000 1014 5.2 0.0 0.2
23 8 00 0 6 10 19.0 18.0 94 21.3 15.4 15.1 19.3 18.2 17.8 18.0 18.0 17.2 1 2 3 0 1.4 000000 1019 2.0 0.0 0.6
24 2 NE 2 8 02 20.0 16.7 81 22.7 16.7 13.9 18.5 17.8 18.1 18.3 18.0 17.0 1 0 1 0 0.0 000000 1021 0.0 0.0 1.7
25 2 E 3 7 05 17.5 11.9 70 19.4 12.8 9.9 17.1 16.3 17.7 18.5 18.2 17.1 0 0 1 0 0.0 000000 1021 0.0 0.0 2.0
26 8 E 2 7 05 14.7 11.9 88 17.5 13.8 12.5 17.0 17.0 17.8 18.2 18.1 17.0 0 0 0 0 0.0 000000 1019 0.0 0.0 1.4
27 2 NE 4 5 05 14.9 12.7 87 19.4 11.9 9.3 14.5 15.3 16.9 17.6 17.9 17.2 0 0 1 0 0.0 000000 1015 0.0 0.0 2.2
28 6 N 1 6 05 15.6 12.7 83 19.6 12.7 10.3 17.8 17.3 17.8 17.9 17.9 17.0 0 0 0 0 0.1 000000 1010 0.2 0.0 1.6
29 7 NE 4 7 03 13.7 9.4 75 16.8 11.0 10.0 15.0 15.6 16.8 17.3 17.8 17.0 0 0 0 0 9.2 004T00 1011 0.7 0.0 2.4
30 6 N 2 8 03 13.2 8.9 75 16.1 7.8 5.8 14.0 13.8 15.7 16.6 17.2 17.0 1 1 3 0 tr 000000 1020 0.0 0.0 1.6
31 7 N 1 7 03 12.6 8.8 78 15.0 7.5 5.0 13.2 13.5 15.0 16.4 17.1 16.8 0 0 1 0 tr 000000 1022 0.0 0.0 1.1
------------------------------------------------------------------------------------------------------------------
Mean
6 17.1 14.0 83 20.8 13.1 10.9 18.0 17.5 18.1 18.5 18.3 17.3 1019
Total 16.8 14.2 0.0 51.3
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1993-2002 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (23%) [21%] and
Mean maximum 20.8 (+1.3) [+1.5] Sleet/snow falling 0 ( 0.0) 19% of 1928-2002 average.
Mean minimum 13.1 (+0.9) [+1.7] Snow lying (at 09GMT) 0 ( 0.0) Most in a day: 9.2 mm on 29th.
Mean 17.0 (+1.1) [+1.6] Hail <5 mm 1 {-0.2} No. days:
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 {all types} 0.0 mm 14 (+ 3.3)
Mean grass min 10.9 (+0.6) Thunder heard 3 >=0.2 mm 8 (- 6.7)
Lowest grass min 0.0 ( 0.0) Gales 0 >=1.0 mm 5 (- 6.5)
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 1 >=5.0 mm 1 (- 4.5)
Mean soil 30cm 18.5 (+1.0)
Lysimeter:
Highest maximum 31.7C (=6.1) on 5th. Lowest minimum 7.5 (+1.2) on 31st. PE 51.4 mm
Minimum relative humidity: 53% on 5 & 17th. No. days at 30 cm >=5.6C 31; days <5.6C nil. PWB -34.6 mm
* Highest max of 31.7C was 2nd highest in August and any month on record since 1979. PWS 9.0 mm
* Highest was 33.0C in 1990. With only 16.8 mm rain it ranks 4th driest August on 76-y record. PWD -43.50 mm
* Mean max 20.8C (ranking 6th) and mean min 13.1C (ranking 3rd) warmest since 1997.
* Hi min 17.7C on 9th (rank 3rd) and mean soil at 30 cm 18.5C (rank 3) warmest since 1997. Piche: 51.3 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR SEPTEMBER 2003
---------------------------------------------------------------------------------------------------------------------------
-09GMT--> ---Air Temperature--- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp Dpt RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C GrSS Rain SLHTGF Press hrs hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 6 N 2 7 03 14.3 10.7 79 16.5 10.0 7.5 14.8 14.0 15.0 16.2 16.8 16.6 0 0 1 0 0.0 000000 1025 0.0 0.0 1.5
02 8 W 2 7 05 14.8 13.0 89 15.7 10.8 8.8 15.2 15.0 15.8 16.2 16.8 16.5 0 0 0 0 0.9 000000 1028 0.4 0.0 0.3
03 7 S 1 7 01 15.7 14.3 91 21.7 11.4 9.1 15.8 15.0 15.7 16.2 16.5 16.4 1 1 2 0 0.0 000000 1031 0.0 0.0 1.5
04 7 00 0 7 05 16.9 12.0 73 23.5 11.0 8.9 16.5 15.8 16.2 16.8 16.9 16.3 0 0 1 0 0.0 000000 1026 0.0 0.0 2.2
05 7 S 2 7 05 17.0 10.5 65 21.0 10.8 8.5 16.2 15.6 15.2 16.8 17.0 16.3 0 0 1 0 4.3 000000 1017 2.5 0.0 2.1
06 5 W 3 6 10 12.7 11.8 94 17.0 11.8 10.8 15.5 15.7 16.5 16.8 17.0 16.2 1 2 3 0 tr 000000 1014 0.0 0.0 1.2
07 3 SW 3 6 03 14.7 10.5 76 17.0 8.9 6.6 13.5 13.2 14.9 16.2 16.9 16.2 1 0 3 0 7.2 000000 1011 13.8 0.0 1.0
08 7 N 2 4 10 13.4 12.9 97 14.0 12.3 11.5 15.0 15.0 15.4 16.0 16.5 16.2 1 2 3 0 0.4 000000 1008 0.8 0.0 0.6
09 6 W 3 6 05 13.2 11.7 91 15.1 7.9 6.0 13.1 12.4 13.5 15.1 16.0 16.0 1 1 3 0 7.4 000000 1015 7.4 0.0 0.6
10 7 SW 4 5 05 15.0 13.9 93 15.5 11.3 10.9 15.5 15.0 14.9 15.7 16.0 15.9 1 1 3 0 4.7 000000 1011 4.4 0.0 0.3
11 7 S 4 7 20 15.7 14.8 95 21.0 12.9 11.8 15.5 15.0 15.2 15.8 16.0 15.9 1 2 3 0 0.9 000000 1018 1.5 0.0 0.7
12 3 W 1 6 05 12.1 11.7 68 19.9 8.0 6.5 12.2 12.6 14.2 15.5 16.0 15.9 1 1 1 0 0.0 000000 1031 0.0 0.0 2.4
13 2 S 5 7 02 17.3 10.0 62 21.2 12.1 10.6 15.0 14.3 15.1 15.9 16.0 15.9 1 0 1 0 0.0 000000 1027 0.0 0.0 3.8
14 1 S 4 6 02 17.7 13.3 75 23.5 14.2 12.5 16.6 15.5 15.8 16.2 16.2 15.9 0 0 1 0 0.0 000000 1029 0.0 0.0 2.5
15 2 SW 3 6 05 17.4 13.4 77 22.9 14.1 11.1 16.1 15.4 16.0 16.3 16.2 15.8 0 0 1 0 0.0 000000 1025 0.0 0.0 2.4
16 4 S 2 6 05 16.7 12.6 77 22.7 10.9 8.3 15.1 14.5 15.6 16.3 16.4 15.9 0 0 1 0 0.0 000000 1024 0.0 0.0 3.9
17 5 S 5 5 05 18.3 11.6 65 22.8 12.1 8.0 15.0 14.6 15.6 16.1 16.3 15.9 0 0 1 0 tr 000000 1017 0.0 0.0 3.2
18 7 SW 3 5 05 16.7 15.3 92 17.6 15.0 14.0 16.5 16.4 16.5 16.3 16.3 15.9 0 1 3 0 8.6 000000 1014 8.0 0.0 0.5
19 8 W 1 5 63 15.0 14.1 94 15.1 14.8 14.3 16.1 16.2 15.3 16.3 16.3 15.9 1 3 3 0 32.5 000000 1013 24.0 0.0 0.2
20 7 W 1 5 63 12.4 12.2 99 13.8 11.8 11.3 14.1 14.4 15.1 16.0 16.1 15.9 1 3 3 0 5.5 000000 1019 8.6 0.0 0.2
21 5 S 2 5 10 14.2 13.5 95 19.2 8.3 6.0 13.0 12.7 13.6 15.0 16.0 15.9 1 1 1 0 12.9 000000 1015 6.3 0.0 0.5
22 8 NW 3 4 63 11.9 10.8 93 14.2 11.0 10.9 14.6 15.0 15.6 15.6 15.9 15.8 1 3 3 0 4.2 000000 1003 3.4 0.0 1.0
23 3 N 3 7 01 9.5 4.1 69 13.7 6.0 2.7 10.6 11.4 13.2 15.0 15.9 15.7 1 1 3 0 0.4 004000 1022 0.2 0.0 1.3
24 1 SW 2 7 02 13.0 10.1 83 17.2 7.9 4.6 11.8 12.0 13.3 14.7 15.3 15.6 1 1 3 0 0.0 000000 1030 0.0 0.0 1.8
25 4 SW 4 6 05 12.8 7.3 69 15.8 7.7 3.9 10.5 11.4 12.9 14.3 15.2 15.3 1 0 1 0 3.0 000000 1025 2.2 0.0 2.4
26 8 NW 4 5 63 11.7 11.1 96 14.3 11.7 10.1 13.3 13.3 13.7 14.4 14.9 15.1 1 3 3 0 tr 000000 1018 0.0 0.0 1.4
27 5 00 0 7 25 11.1 8.3 83 13.1 7.4 4.1 11.9 12.0 13.1 14.2 15.0 15.1 1 1 1 0 tr 000000 1022 0.0 0.0 0.7
28 1 W 1 7 01 10.8 7.5 80 15.0 7.0 3.3 11.4 11.9 12.8 14.0 14.9 15.0 1 0 1 0 11.4 000000 1016 3.2 0.0 0.7
29 7 S 2 7 02 12.7 12.0 95 14.3 6.2 3.5 12.5 12.7 13.0 13.8 14.6 14.9 1 2 3 0 55.4 000000 1009 16.5 0.0 0.5
30 7 SE 1 7 01 13.0 11.9 93 17.0 11.2 10.0 13.3 13.0 13.3 13.9 14.3 14.9 1 2 3 0 tr 000000 1006 0.0 0.0 0.8
------------------------------------------------------------------------------------------------------------------
Mean
5 14.3 11.6 84 17.7 10.5 8.5 14.2 14.0 14.7 15.6 16.0 15.8 1019
Total 159.7 103.2 0.0 42.2
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1993-2002 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (172%) [174%] and
Mean maximum 17.7 (+0.5) [+0.7] Sleet/snow falling 0 ( 0.0) 160% of 1928-2002 average.
Mean minimum 10.5 (+0.1) [+0.8] Snow lying (at 09GMT) 0 ( 0.0) Most in a day: 55.4 mm on 29th
Mean 14.1 (+0.3) [+0.8] Hail <5 mm 1 {+0.4} No. days:
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 {all types} 0.0 mm 9 (- 1.7)
Mean grass min 8.5 (+0.3) Thunder heard 0 (-0.8) >=0.2 mm 16 (+ 1.0)
Lowest grass min 2.7 (-0.1) Gales 0 >=1.0 mm 12 (- 0.4)
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 0 >=5.0 mm 8 (+ 1.3)
Mean soil 30cm 15.6 (+0.2)
Lysimeter:
Highest maximum 23.5C (+0.5) on 4,14th. Lowest minimum 6.0C (-0.3) on 23rd. PE 25.5 mm
Minimum relative humidity: 52% on 16th. No. days at 30 cm >=5.6C 30; days <5.6C nil. PWB 134.2 mm
* Rainfall of 55.4 mm on 29th was highest in Sep at this station and 2nd highest fall PWS 145.1 mm
* in any month (69.1 mm in March 1981). But 82.6 mm fell in Llansadwrn on 19th Sep 1946. PWD -11.0 mm
* Mean and mean min ranked 9th warmest in Sep while mean max was ranked 8th.
* Piche: 42.2 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR OCTOBER 2003
---------------------------------------------------------------------------------------------------------------------------
-09GMT--> ---Air Temperature--- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp Dpt RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C GrSS Rain SLHTGF Press hrs hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 1 E 1 7 04 14.0 9.3 73 16.7 10.3 6.3 12.2 12.6 13.5 14.0 14.5 14.8 1 0 1 0 0.0 000000 1010 0.0 0.0 1.6
02 1 NE 1 7 04 11.6 9.7 77 16.9 8.5 5.9 10.4 11.3 13.0 14.0 14.7 14.8 1 0 1 0 tr 000000 1013 0.0 0.0 1.0
03 8 00 0 6 50 12.5 12.1 98 14.3 9.8 7.8 12.9 12.8 13.4 14.0 14.4 14.5 1 3 3 0 0.1 000000 1012 0.0 0.0 0.8
04 6 NE 2 7 05 10.2 5.9 75 13.1 8.3 5.8 11.1 11.5 12.9 13.8 14.4 14.5 1 0 1 0 3.4 004000 1015 2.2 0.0 1.8
05 6 NW 2 7 25 7.3 6.6 96 13.1 5.5 2.8 9.5 9.8 11.5 13.1 14.0 14.5 1 3 3 0 11.4 004000 1021 7.5 0.0 1.0
06 8 NW 3 6 80 9.9 7.8 87 12.0 7.3 6.6 11.0 11.3 12.1 13.2 13.8 14.4 1 3 3 0 0.4 000000 1008 0.8 0.0 1.4
07 6 N 3 6 80 9.3 7.6 89 14.1 8.7 7.1 10.5 10.8 11.9 12.9 13.7 14.2 1 2 3 0 3.2 000000 1008 3.2 0.0 1.3
08 8 W 4 7 02 14.1 13.4 95 16.3 9.3 6.5 13.0 12.6 12.7 13.2 13.5 14.0 1 2 3 0 0.1 000000 1015 0.0 0.0 0.4
09 8 SW 5 7 02 13.2 11.3 88 14.6 11.7 10.4 13.0 13.0 13.2 13.6 13.8 14.0 1 2 3 0 1.1 000000 1018 0.6 0.0 0.8
10 5 W 3 7 05 10.2 8.8 91 16.3 8.0 4.5 11.0 11.8 13.0 13.5 13.8 13.9 1 2 3 0 0.0 000000 1017 0.0 0.0 1.0
11 6 W 2 8 03 12.3 9.8 85 17.6 7.6 5.5 11.5 11.7 12.7 13.2 13.8 14.0 1 0 1 0 0.0 000000 1023 0.0 0.0 1.3
12 7 SE 2 7 05 13.0 8.0 71 16.0 11.6 9.3 12.4 12.6 13.3 13.6 13.8 14.0 1 0 1 0 2.6 000000 1023 6.5 0.0 1.3
13 8 00 0 6 10 11.3 10.9 97 13.6 10.3 8.3 12.2 12.5 13.0 13.4 13.8 14.0 1 3 3 0 0.8 000000 1019 2.5 0.0 0.6
14 6 SE 3 7 05 12.1 7.8 75 17.3 8.8 6.3 11.5 11.8 12.8 13.2 13.8 13.8 1 1 3 0 0.0 000000 1023 0.0 0.0 1.8
15 6 E 3 7 05 9.7 4.3 69 15.4 6.2 4.0 9.5 10.2 11.9 11.8 13.5 13.8 1 0 1 0 0.0 000000 1027 0.0 0.0 2.4
16 1 NE 1 7 04 9.7 3.5 65 16.6 6.0 2.0 7.8 9.0 11.0 12.3 13.3 13.8 1 0 1 0 0.0 000000 1029 0.0 0.0 2.0
17 0 E 1 7 04 8.9 5.8 81 12.7 5.8 1.7 7.9 8.9 10.8 12.0 13.0 13.8 1 0 1 0 0.0 000000 1025 0.0 0.0 1.8
18 1 E 3 7 04 8.5 4.7 77 14.1 5.4 1.0 7.2 8.4 10.3 10.5 12.8 13.5 1 0 1 0 0.0 000000 1020 0.0 0.0 1.8
19 2 E 3 7 04 7.3 4.6 83 11.0 5.2 1.8 7.5 8.5 10.1 11.3 12.5 13.5 1 0 1 0 tr 000000 1015 0.0 0.0 2.3
20 5 NE 2 7 01 7.5 5.7 88 9.2 6.0 4.6 7.8 8.4 10.0 11.2 12.2 13.1 0 0 0 0 4.8 004000 1015 3.8 0.0 1.2
21 8 00 0 6 80 4.4 4.2 98 6.8 2.8 0.2 7.0 7.8 9.5 10.6 12.0 12.9 1 3 3 0 6.9 s04000 1010 7.7 0.0 0.2
22 6 E 2 7 10 4.7 4.0 95 7.5 3.0 1.4 6.5 7.3 9.0 10.1 11.7 12.8 1 2 3 0 0.3 000000 1009 0.1 0.0 0.7
23 1 E 3 7 05 5.7 4.1 89 9.9 4.1 1.8 6.2 7.0 9.0 10.0 11.5 12.5 1 2 3 0 0.2 000000 1020 0.0 0.0 1.2
24 7 N 2 7 87 7.0 5.7 91 10.2 2.2 -1.4 6.5 7.0 8.5 10.0 11.2 12.5 1 3 4 0 2.8 004t00 1025 2.0 0.0 1.0
25 7 N 1 7 10 5.4 5.2 98 12.3 4.5 0.6 6.8 7.3 8.7 9.8 11.0 12.2 1 2 3 0 2.6 004000 1025 2.2 0.0 1.3
26 6 NE 2 7 02 7.2 3.4 77 9.7 5.3 3.3 6.8 7.6 9.0 10.0 11.0 12.0 1 1 4 0 0.0 000000 1019 0.0 0.0 0.8
27 1 S 1 7 02 5.7 4.1 89 11.7 3.5 -0.5 5.6 6.5 8.2 9.5 10.8 12.0 1 0 4 0 0.0 000000 1022 0.0 0.0 1.4
28 7 SW 2 7 05 9.5 7.6 88 10.5 5.7 3.4 8.0 8.0 8.8 9.5 10.3 11.8 1 1 1 0 2.5 000000 1013 6.0 0.0 0.3
29 5 W 1 7 01 6.3 6.1 98 8.2 4.7 0.8 7.4 8.0 9.2 9.8 10.5 11.8 1 2 3 0 3.7 000000 992 4.2 0.0 0.1
30 6 SE 1 7 01 3.5 2.8 95 9.6 2.1 -1.6 5.2 6.2 8.0 9.2 10.3 11.6 1 2 4 0 7.2 000000 985 12.2 0.0 0.9
31 8 NE 4 5 61 7.3 6.9 97 9.4 2.8 1.5 7.8 8.1 8.7 9.2 10.3 10.5 1 3 3 0 2.0 000000 979 3.7 0.0 1.6
------------------------------------------------------------------------------------------------------------------
Mean
5 9.0 6.8 86 12.8 6.5 3.8 9.2 9.7 11.0 11.8 12.7 13.3 1015
Total 56.1 65.2 0.0 37.1
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1993-2002 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (48%) [50%] and
Mean maximum 12.8 (-1.4) [-1.0] Sleet/snow falling 1 (+0.8) 47% of 1928-2002 average.
Mean minimum 6.5 (-1.6) [-0.8] Snow lying (at 09GMT) 0 ( 0.0) Most in a day: 11.4 on 5th.
Mean 9.7 (-1.5) [-0.9] Hail <5 mm 6 {+4.5} No. days:
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 {all types} 0.0 mm 10 (+ 1.4)
Mean grass min 3.8 (-1.7) Thunder heard 1 (+0.6) >=0.2 mm 17 (- 2.7)
Lowest grass min -1.6 (-0.8) Gales 0 >=1.0 mm 13 (- 2.9)
No. days <0.0C 3 (+0.6) Fog (at 09GMT) 0 >=5.0 mm 3 (- 5.3)
Mean soil 30cm 11.8 (-0.3)
Lysimeter:
Highest maximum 17.6C (-2.1) on 11th. Lowest minimum 2.1 (-1.1) on 30th. PE 10.3 mm
Minimum relative humidity: 50% on 16th. No. days at 30 cm >=5.6C 31; days <5.6C nil. PWB 45.8 mm
* With 56.1 mm rainfall was driest Oct since 1997 (53.6 mm), ranks 9th driest since 1928. PWS 48.9 mm
* Mean of 9.7C was coolest Oct since 1993 (8.7C), ranks 6th coolest on 25-y record. PWD -3.1 mm
* Both mean max 12.8C and mean min 6.5 C coolest since 1993 with 12.1C and 5.3C respectively.
* Lo max of 6.8C on the 21st was coldest in October on station's 25-y record. Piche: 37.1 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR NOVEMBER 2003
---------------------------------------------------------------------------------------------------------------------------
-09GMT--> ---Air Temperature--- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp Dpt RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C GrSS Rain SLHTGF Press hrs hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 5 00 0 7 10 7.1 6.7 97 11.3 7.0 4.5 7.7 8.0 8.8 9.3 10.2 11.2 1 2 3 0 18.5 000000 997 8.0 0.0 0.9
02 7 SW 3 6 89 10.0 9.0 93 11.6 5.7 3.7 9.2 9.3 9.4 9.6 10.2 11.2 1 5 5 0 7.9 006000 982 5.0 0.0 1.0
03 6 W 5 7 05 9.2 7.7 91 12.0 7.6 5.4 8.5 8.7 9.1 9.8 10.2 11.1 1 2 4 0 0.0 005000 995 0.0 0.0 1.2
04 7 S 6 7 05 11.3 8.7 84 15.4 5.2 0.7 8.5 8.3 8.8 9.3 10.1 11.1 1 2 1 0 0.0 000000 1017 0.0 0.0 3.0
05 5 S 5 7 01 15.2 9.9 70 18.7 11.3 9.5 10.7 10.5 10.3 10.2 10.2 11.0 1 0 0 0 tr 0000G0 1018 0.0 0.0 4.1
06 1 SE 1 7 04 9.6 8.8 95 17.5 8.6 4.6 8.9 9.8 10.5 10.5 10.7 11.1 1 1 1 0 0.0 000000 1024 0.0 0.0 1.4
07 1 SE 1 7 04 11.5 7.8 78 18.1 9.6 5.0 8.6 9.4 10.3 10.4 11.0 11.1 1 0 1 0 0.0 000000 1025 0.0 0.0 2.4
08 6 E 4 6 04 7.3 5.0 86 9.6 5.4 0.2 6.8 7.4 9.0 10.0 10.8 11.2 1 0 1 0 0.0 000000 1023 0.0 0.0 1.1
09 6 SE 1 5 04 8.0 4.8 80 13.5 4.5 -0.2 6.3 7.0 8.5 9.5 10.2 11.1 1 0 1 0 1.7 000000 1013 1.4 0.0 1.4
10 5 S 2 6 04 10.1 7.8 86 14.2 7.8 4.5 7.8 8.2 9.1 9.8 10.4 11.2 1 2 3 0 0.0 000000 1020 0.0 0.0 1.0
11 7 SE 1 7 04 9.9 6.5 79 12.6 6.5 1.5 7.8 8.2 9.0 9.7 10.4 11.1 1 1 1 0 1.5 000000 1016 3.5 0.0 1.1
12 1 W 1 7 10 6.3 5.9 97 13.4 5.4 0.6 7.4 8.5 9.8 9.8 10.3 11.0 1 2 1 0 4.5 000000 1015 1.0 0.0 0.9
13 8 S 1 7 10 8.2 7.6 96 11.5 5.5 0.0 6.5 7.2 8.5 9.5 10.3 11.0 1 2 3 0 9.2 000000 1019 9.7 0.0 1.4
14 6 SW 7 6 25 8.9 8.1 95 10.2 8.2 7.3 8.8 9.0 9.3 9.8 10.1 11.0 1 3 3 0 5.2 0000G0 993 3.5 0.0 0.4
15 4 W 1 7 10 5.6 5.4 98 10.6 5.3 0.8 7.0 7.8 9.0 9.6 10.1 11.0 1 2 1 0 1.6 000000 1010 0.4 0.0 0.3
16 3 NW 1 7 01 4.3 4.3 100 11.5 2.3 -1.9 4.8 5.7 7.5 8.8 10.0 11.0 1 2 4 0 5.2 004000 1018 5.2 0.0 1.0
17 8 SW 1 4 60 11.5 11.5 100 12.5 4.0 -0.9 9.1 8.5 8.1 8.8 10.0 10.8 1 3 3 0 2.3 000000 1015 3.2 0.0 0.0
18 8 SW 4 7 02 12.5 11.6 94 13.0 11.5 11.0 10.9 10.7 10.0 9.8 9.9 10.6 1 2 3 0 0.5 000000 1017 1.0 0.0 0.6
19 8 W 5 5 21 12.2 12.0 99 12.3 11.5 10.8 11.2 11.0 10.8 10.2 10.5 10.6 1 2 3 0 27.7 000000 1017 19.3 0.0 0.3
20 8 SW 4 5 02 10.3 10.1 99 10.3 9.6 9.2 10.2 10.2 10.5 10.6 10.6 10.9 2 3 3 0 3.0 000000 1008 2.0 0.0 0.1
21 7 NW 1 7 10 4.8 4.3 97 10.1 3.5 -1.2 5.5 6.7 8.8 9.9 10.2 10.8 1 2 3 0 tr 000000 1009 0.0 0.0 0.5
22 7 NE 1 7 03 4.9 3.2 89 8.9 3.2 -1.8 5.0 5.8 7.5 8.8 10.0 10.9 1 2 4 0 tr-fr 000000 1004 0.0 0.0 0.2
23 1 00 0 7 04 3.2 2.7 97 10.2 2.4 -2.5 3.0 4.3 6.5 8.0 9.5 10.8 1 0 5 0 tr-fr 000000 1006 0.0 0.0 0.5
24 7 NW 1 7 03 4.2 3.7 97 10.3 2.5 -2.5 3.5 4.1 6.0 7.5 9.0 10.4 1 1 5 0 5.5 000000 1009 5.1 0.0 0.8
25 7 W 1 7 10 7.7 6.8 94 9.6 4.2 2.1 7.9 8.0 8.0 8.0 8.8 10.1 1 2 3 0 22.0 000000 1001 12.5 0.0 0.5
26 3 SW 2 7 01 4.6 3.6 93 6.5 4.6 1.2 6.1 7.0 7.8 8.2 9.0 10.0 1 2 3 0 1.1 004000 981 1.8 0.0 0.4
27 1 NW 1 7 10 3.1 2.9 98 9.0 1.6 -2.3 3.0 4.2 6.1 7.0 8.8 10.0 1 2 5 0 tr-fr 004000 997 0.0 0.0 0.7
28 7 S 2 7 05 7.0 5.0 87 11.3 2.4 -2.0 4.0 4.3 5.6 7.0 8.2 10.0 1 2 4 0 1.4 000000 1004 2.2 0.0 1.4
29 8 SE 2 6 21 10.5 8.9 90 12.6 7.0 5.8 8.5 8.2 8.0 7.8 8.2 9.8 1 3 3 0 4.2 000000 991 2.5 0.0 0.7
30 7 00 0 7 02 5.2 4.5 95 7.0 4.9 0.3 5.2 6.1 7.1 7.8 8.6 9.6 1 2 3 0 3.4 000000 999 6.2 0.0 0.3
------------------------------------------------------------------------------------------------------------------
Mean
6 8.1 6.8 92 11.8 6.0 2.4 7.3 7.7 8.6 9.2 9.9 10.8 1008
Total 126.4 93.5 0.0 29.6
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1993-2002 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (95%) [101%] and
Mean maximum 11.8 (+1.2) [+1.8] Sleet/snow falling 0 (-0.5) 101% of 1928-2002 average.
Mean minimum 6.0 (+0.4) [+0.5] Snow lying (at 09GMT) 0 (-0.1) Most in a day: 27.7 mm on 19th
Mean 8.9 (+0.8) [+1.2] Hail <5 mm 3 {+0.8} No. days:
No. days <0.0C 0 (-1.3) Hail >=5 mm 2 {all types} 0.0 mm 6 (+ 1.1)
Mean grass min 2.4 (-0.2) Thunder heard 0 (-0.8) >=0.2 mm 19 (- 3.2)
Lowest grass min -2.5 (+0.9) Gales 2 >=1.0 mm 18 (+ 0.9)
No. days <0.0C 9 (+0.2) Fog (at 09GMT) 0 >=5.0 mm 8 (- 0.9)
Mean soil 30cm 9.2 (+0.3)
Lysimeter:
Highest maximum 18.7C (+3.6) on 5th. Lowest minimum 1.6 (+0.7) on 27th. PE -0.5 mm
Minimum relative humidity: 35% on 7th. No. days at 30 cm >=5.6C 30; days <5.6C nil. PWB 126.9 mm
* A warm month with mean 8.9C (+0.8) [+1.2] ranks 4 (10.1C in 1994). Hi max 18.7C and PWS 127.8 mm
* mean 15.0C on the 5th are highest on record since 1979 (17.3C & 14.6C respectively) in 1997. PWD -0.9 mm
* Mean min 6.0C ranks 4th highest (7.9C in 1994). Rainfall was average and not as wet as
* 2002 (184.6 mm) but wetter than 2001 (107.7 mm). Piche: 29.6 ml
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Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
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CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR DECEMBER 2003
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-09GMT--> ---Air Temperature--- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp Dpt RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C GrSS Rain SLHTGF Press hrs hrs Evap
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01 8 NE 4 7 05 7.0 4.7 85 9.5 2.6 -2.0 5.4 5.7 6.7 7.3 8.3 9.6 1 2 4 0 8.8 000000 1004 8.8 0.0 0.8
02 8 NE 1 5 10 8.8 8.4 97 10.0 7.0 5.9 7.8 7.8 7.8 7.8 8.2 9.4 1 2 3 0 tr 000000 1012 0.0 0.0 0.3
03 8 NE 1 4 80 8.6 8.2 97 9.2 4.5 -0.2 7.0 6.9 7.1 7.7 8.3 9.3 1 2 3 0 0.4 000000 1024 0.5 0.0 0.4
04 8 E 2 6 04 7.7 6.4 91 8.5 6.0 3.1 6.8 6.9 7.4 7.8 8.2 9.2 1 2 1 0 tr 000000 1033 0.0 0.0 0.8
05 3 NE 1 7 04 7.5 3.8 77 11.3 5.2 3.0 4.8 5.4 6.7 7.4 8.2 9.2 1 2 1 0 0.3 000000 1031 0.1 0.0 0.5
06 5 E 4 5 01 8.2 7.6 96 8.4 5.1 1.0 7.4 7.4 7.3 7.6 8.1 9.2 1 2 2 0 0.0 000000 1031 0.0 0.0 1.0
07 1 SE 3 7 04 3.2 -1.6 71 8.0 0.8 -4.5 2.1 3.5 5.7 7.0 8.1 9.2 3 1 5 0 0.0 000000 1031 0.0 4.6 1.0
08 0 E 1 7 04 -0.9 -3.4 83 8.0 -2.5 -9.2 1.0 2.3 4.0 5.5 7.5 9.1 3 5 7 0 0.0 000000 1020 0.0 10.2 0.8
09 7 SE 1 7 04 6.1 4.7 91 9.7 -1.1 -7.1 4.0 4.1 4.5 5.4 7.0 8.8 1 1 4 0 0.0 000000 1014 0.0 0.0 0.8
10 8 S 2 7 05 8.6 6.2 85 9.4 4.6 0.8 5.5 5.5 5.2 5.8 6.8 8.6 1 1 0 0 10.6 000000 1014 8.2 0.0 0.8
11 6 N 2 6 01 9.1 8.7 97 9.1 8.0 7.2 7.5 7.5 7.0 6.8 7.2 8.5 1 2 3 0 2.1 000000 1002 3.9 0.0 0.7
12 8 S 2 7 10 7.7 7.3 97 11.7 2.0 0.0 5.5 5.5 6.0 6.5 7.3 8.5 1 2 3 0 26.1 000003 1012 17.0 0.0 0.2
13 7 W 3 5 10 11.0 11.0 100 11.0 7.7 7.0 9.9 9.5 8.7 8.0 7.8 8.3 1 2 3 0 1.0 000000 1004 1.8 0.0 0.6
14 7 NW 2 6 10 6.1 4.7 91 9.2 5.0 2.3 5.0 6.0 7.2 7.7 8.1 8.5 1 2 3 0 0.8 000000 1017 1.0 0.0 0.7
15 7 N 1 7 03 4.0 3.0 93 7.3 2.8 -0.1 4.5 5.5 6.5 7.2 7.9 8.6 1 2 3 0 0.0 000000 1029 0.0 0.0 0.7
16 8 SW 2 7 05 7.0 4.2 82 8.3 1.8 -1.2 5.0 5.1 5.9 6.6 7.6 8.8 1 1 0 0 0.0 000000 1026 0.0 0.0 1.5
17 1 N 1 7 04 2.6 1.6 93 8.7 2.6 -1.0 3.5 5.0 6.2 6.8 7.5 8.7 1 0 5 0 0.0 000000 1020 0.0 0.0 0.9
18 6 NW 1 7 04 4.0 0.0 75 8.0 2.2 -1.7 1.5 2.7 4.6 5.6 7.1 8.5 1 0 7 0 0.7 000000 1015 1.9 0.0 0.6
19 9 N 1 2 42 7.0 7.0 100 8.2 3.7 0.1 5.5 5.2 5.2 5.8 6.8 8.5 1 3 3 0 1.9 000002 1016 6.1 0.0 0.4
20 8 SE 1 5 61 6.2 5.8 97 7.2 3.1 -0.1 5.8 5.9 6.0 6.2 6.9 8.4 1 3 3 0 7.7 004000 999 7.5 0.0 0.6
21 6 N 3 7 01 5.5 1.8 77 6.0 3.5 1.2 4.4 5.0 5.8 6.1 7.1 8.2 1 2 4 0 2.1 004000 1010 2.5 0.0 2.2
22 7 N 1 7 85 2.1 0.8 91 8.2 2.1 0.1 1.8 2.6 4.2 5.3 6.7 8.2 1 5 9 0 3.1 s03000 1031 8.8 0.0 0.5
23 8 W 2 6 10 8.2 8.0 99 9.7 2.1 0.5 6.0 5.8 5.5 5.8 6.4 8.0 1 2 3 0 1.0 000000 1023 1.8 0.0 0.1
24 8 SW 2 7 02 8.6 8.0 96 9.5 8.2 7.1 7.2 7.2 7.0 6.8 7.0 7.9 1 2 3 0 0.4 000000 1025 0.9 0.0 0.8
25 8 SW 5 5 10 9.5 8.9 96 9.8 8.6 7.5 8.1 7.9 7.5 7.2 7.3 8.0 1 2 3 0 32.4 000000 1015 16.8 0.0 0.2
26 8 S 6 5 63 9.0 8.8 97 9.0 8.7 8.1 8.5 8.3 8.1 8.0 7.8 8.2 2 3 3 0 19.0 005000 996 7.8 0.0 0.4
27 6 W 1 7 01 3.0 2.0 93 4.8 2.5 0.0 3.5 4.5 6.1 6.9 7.6 8.2 1 2 6 0 1.1 004000 991 0.9 0.0 0.4
28 6 E 5 7 05 3.5 0.0 78 5.0 0.0 -2.8 2.8 3.6 5.1 6.0 7.1 8.2 1 2 6 0 0.0 003000 1000 0.0 0.0 0.5
29 6 NE 1 7 01 1.5 0.4 92 4.5 0.3 -3.0 1.1 2.4 4.0 5.1 6.5 8.2 3 5 5 0 0.0 000000 1003 0.0 0.0 fr
30 8 SE 1 7 02 -0.5 -1.7 92 2.5 -1.8 -5.6 0.8 1.7 3.0 4.3 6.1 8.0 3 5 7 0 0.0 000000 1015 0.0 16.2 1.2
31 7 SE 1 7 04 2.1 -2.2 73 7.0 -1.2 -4.3 1.1 1.9 3.0 4.0 5.8 7.7 3 1 5 0 17.0 0000G0 1025 11.2 6.8 1.2
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Mean
6 5.9 4.3 90 8.3 3.4 0.4 4.9 5.3 6.0 6.5 7.4 8.6 1016
Total 136.5 107.5 37.8 21.6
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(.) Differences from 1993-2002 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (108%) [119%] and
Mean maximum 8.3 (+0.3) [+0.4] Sleet/snow falling 1 (-2.1) 120% of 1928-2002 average.
Mean minimum 3.4 (+0.2) [+0.3] Snow lying (at 09GMT) 0 (-1.5) Most in a day:
Mean 5.9 (+0.3) [+0.4] Hail <5 mm 1 {+0.7} No. days:
No. days <0.0C 4 (-1.3) Hail >=5 mm 5 {all types} 0.0 mm 10 (+ 4.0)
Mean grass min 0.4 (-0.1) Thunder heard 0 (-0.8) >=0.2 mm 19 (- 2.5)
Lowest grass min -9.2 (-2.7) Gales 1 >=1.0 mm 14 (- 3.0)
No. days <0.0C 14 (+0.1) Fog (at 09GMT) 1 >=5.0 mm 7 (- 2.4)
Mean soil 30cm . ( 0.0)
Lysimeter:
Highest maximum 11.7C (-1.2) on 12th. Lowest minimum -2.5 (-0.2) on 8th. PE 0.0 mm
Minimum relative humidity: 53% on 17th. No. days at 30 cm >=5.6C 25; days <5.6C 6. PWB 0.0 mm
* Wettest December since 2000 (153.6 mm) and 1999 (193.8 mm) ranking 22 wettest since 1929. PWS 0.0 mm
* PWD 0.0 mm
*
* Piche: 21.6 ml
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Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
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Monthly and annual summary statistics at Llansadwrn, Anglesey for 2003
(.) Difference from 1993-2002 average used by the Weather Observers Network. Rainfall 1008.5 mm (95%) [102%]
[.] Difference from 1971-2000 average. or 97% of 1929-2002 average.
Air temperatures Weather (No. days occurrence) Most in a day: 55.4 (Sep 29),
Mean maximum 14.0 (+0.7) [+0.6] Sleet/snow falling 6 (-8.2) 32.4 mm (Dec 25) and
Mean minimum 7.3 (+0.3) [+0.9] Snow lying (at 09GMT) 0 (-3.5) 27.8 mm (May 21).
Mean 10.7 (+0.5) [+0.8] Hail <5 mm 31 [+ 5.9] No. of days with:
No. days <0.0C 21 (+2.3) Hail >=5 mm 3 [all hail] >=0.2 mm 182 (-26)
Mean grass min 4.5 (-0.3) Thunder heard 7 (-1.0) >=1.0 mm 136 (-24)
Lowest grass min -9.2 (-0.8) Gales 7 >=5.0 mm 61 (-15)
No. days <0.0C 82 (+13.2) Fog (at 09GMT) 4 Lysimeter:
PE 317.4 mm
Highest maximum 31.7 on Aug 5th. Lowest minimum -3.1 on Feb 15th. PWB 691.1 mm
Minimum relative humidity: 35% on Nov 7th and 37% on 18 & 19th Feb. PWS 886.5 mm
* Frost-free (air) from Apr 11th to Dec 7th (ground) May 4th to Oct 23rd. PWD -195.4 mm
Drier than 2002 (1187.2mm), wetter than 2001 (866.0mm), ranked only 25th driest since 1929. Piche: 491.4 mls
Mean 10.7C ranks equal warmest year with 1990 & 1997. Mean max 14.0C warmest since 1997 (14.0) ranks 4.
Mean min 7.3C cooler than 2001 (7.4C) ranks 5th warmest. AF 21 most since 1996 (40 apart from 2001 (28).
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Annual summaries for 2003 (No. days occurrence at 09 GMT).
Cloud cover Wind direction Wind speed Visibility Code Description
Cloud obscured 4 N 34 Calm 13 <100 m 0 Dense fog 0
8/8 cloud 90 NE 49 Force 1-3 257 100-190 m 1 Thick fog 1
6/8 to 7/8 148 E 27 Force 4-5 81 200-390 m 2 Fog 2
3/8 to 5/8 60 SE 34 Force 6-7 14 400-900 m 3 Mod. fog 2
1/8 to 2/8 46 S 73 Force 8-12 0 1.0-1.9 km 4 Very poor 16
Sky cloudless 17 SW 70 2.0-3.9 km 5 Poor 52
W 37 Check 365 4.0-9.0 km 6 Moderate 60
Check 365 NW 28 10 km or mo 7 Good 232
Calm 13
Check 365
Check 365
For information on the state of the grass, ground and concrete
codes consult the 'Recording Atmospheric Depositions on Grass' page.
State of grass (Atmospheric depositions on grass)
Co 0 1 2 3 4 5 6 7 8 9 Check
Ja 5 2 1 13 3 1 0 5 0 1 31
Fe 4 0 2 8 3 4 2 3 1 1 28
Ma 3 8 1 6 7 6 0 0 0 0 31
Ap 4 7 2 11 6 0 0 0 0 0 30
Ma 1 7 1 19 3 31
Ju 1 16 1 12 0 0 30
Ju 7 7 1 16 0 0 31
Au 6 13 4 8 31
Se 1 13 1 15 30
Oc 1 11 0 15 4 31
No 1 8 0 13 4 4 0 0 30
De 2 2 1 13 3 4 2 3 0 1 31
Yr 36 94 15 149 33 19 4 11 1 3 365
State of ground
Co 0 1 2 3 4 5 6 7 8 9 Check
Ja 2 22 1 6 0 0 0 0 31
Fe 0 19 1 6 0 2 0 0 28
Ma 9 20 2 0 0 0 31
Ap 14 15 1 0 0 0 0 30
Ma 8 21 2 31
Ju 16 14 30
Ju 14 17 31
Au 23 8 0 31
Se 9 21 0 30
Oc 1 30 0 0 31
No 0 29 1 0 0 30
De 0 25 1 5 0 0 0 0 0 31
Yr 96 241 9 17 0 2 0 0 0 0 365
State of concrete
Co 0 1 2 3 4 5 6 7 8 9 Check
Ja 6 5 15 2 1 2 0 0 31
Fe 11 3 9 3 0 2 0 0 28
Ma 19 5 5 2 0 0 0 31
Ap 20 1 7 2 0 0 30
Ma 15 7 4 5 31
Ju 22 3 1 4 30
Ju 21 2 4 4 31
Au 24 3 4 0 31
Se 12 9 5 4 30
Oc 12 3 9 7 31
No 5 3 17 4 0 1 30
De 2 5 17 3 0 4 0 0 31
Yr 169 49 97 40 1 9 0 0 0 0 365
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