Llansadwrn (Anglesey) Weather
Daily Observations 2001
at 0900 GMT
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Llansadwrn (Anglesey) Weather |
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CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JANUARY 2001
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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 S 2 5 01 8.5 6.3 86 10.6 3.2 2.2 5.0 4.5 4.0 3.8 4.5 6.5 1 2 4 0 4.6 000000 978 1.6 0.0 2.2
02 7 00 0 7 02 7.3 4.8 84 8.5 7.3 4.9 5.4 5.5 5.3 5.0 5.3 6.3 1 2 3 0 3.7 000000 974 2.5 0.0 0.6
03 7 SW 3 7 80 4.1 1.8 85 8.4 2.8 0.0 2.4 3.3 5.3 5.1 5.4 6.5 1 1 3 0 10.4 000000 992 8.7 0.0 0.7
04 8 NW 1 6 10 6.4 6.0 97 6.4 4.1 2.4 6.3 6.2 6.0 5.3 5.7 6.6 1 2 3 0 tr 000000 983 0.0 0.0 0.2
05 6 NE 1 7 04 1.8 1.3 96 5.4 0.6 -1.8 1.8 2.6 4.0 5.0 5.8 6.7 1 1 5 0 tr 000000 984 0.0 0.0 0.3
06 7 W 2 6 05 5.8 4.9 94 7.0 1.8 -0.2 4.2 4.4 4.5 4.8 5.5 6.5 1 1 3 0 0.4 000000 993 1.2 0.0 0.5
07 1 W 1 7 05 3.0 2.0 93 6.5 2.6 -0.3 2.4 2.9 4.6 5.0 5.7 6.8 1 2 5 0 2.1 000000 1004 1.5 0.0 0.4
08 7 W 1 6 05 5.0 4.1 94 6.4 3.0 0.4 4.5 4.5 4.8 5.1 5.7 6.8 1 2 3 0 0.0 000000 1012 0.0 0.0 0.4
09 5 NE 1 8 04 1.6 1.1 93 5.5 1.5 -1.7 1.5 2.8 4.0 4.7 5.5 6.7 1 1 5 0 0.1 000000 1013 0.0 0.0 0.3
10 7 NE 3 7 80 3.6 2.6 93 4.9 0.8 -1.5 1.5 1.8 3.0 4.1 5.2 6.6 1 2 3 0 tr 000000 1013 0.0 0.0 1.6
11 1 E 5 8 02 2.4 -1.2 77 5.0 2.1 -0.3 0.8 1.7 3.0 3.8 5.0 6.5 1 0 5 0 0.0 000000 1022 0.0 0.0 1.4
12 6 E 5 8 03 3.6 0.1 78 5.7 2.4 -0.2 1.0 1.5 2.6 3.4 4.5 6.2 1 0 5 0 0.0 000000 1026 0.0 0.0 1.2
13 0 NE 1 7 04 -0.3 -2.4 86 8.2 -1.4 -6.2 0.4 1.2 2.1 3.1 4.4 6.2 3 0 7 0 0.0 000000 1030 0.0 5.5 2.4
14 0 00 0 7 05 2.5 -3.4 65 7.1 -0.3 -5.2 0.2 1.0 2.0 2.5 4.2 6.2 3 0 7 0 0.0 000000 1035 0.0 0.0 0.9
15 0 NE 1 7 04 -0.8 -2.6 87 6.5 -1.4 -6.0 0.0 0.7 1.5 2.3 3.8 5.8 3 6 7 0 0.0 000000 1026 0.0 9.0 0.4
16 7 00 0 7 04 -1.3 -2.5 91 4.1 -2.5 -8.3 -0.3 0.5 1.5 2.2 3.6 5.8 3 6 7 0 0.0 000000 1022 0.0 18.0 0.3
17 1 00 0 7 05 -0.8 -4.0 79 5.5 -2.6 -6.6 -0.4 0.3 1.3 2.0 3.5 5.6 3 5 7 0 0.0 000000 1019 0.0 7.0 0.6
18 7 SE 1 7 04 0.7 -1.3 86 6.5 -0.6 -5.1 -0.4 0.3 1.1 1.7 3.2 5.2 3 5 7 0 0.0 000000 1019 0.0 2.5 0.6
19 2 00 0 6 04 -1.4 -2.6 91 4.3 -1.7 -6.0 0.0 0.4 1.2 1.7 3.2 5.2 3 0 7 0 0.0 000000 1021 0.0 12.8 0.5
20 1 00 0 6 04 -0.4 -1.6 92 5.6 -1.6 -5.9 -0.3 0.4 1.1 1.8 3.0 5.0 3 6 7 0 0.8 000000 1025 2.3 10.0 1.0
21 8 SE 1 7 10 4.5 2.5 87 9.5 -0.4 -4.2 0.0 0.5 1.1 1.8 2.9 4.8 3 2 3 0 1.0 000001 1008 3.0 0.0 0.9
22 8 SE 2 7 10 9.5 6.3 80 9.6 0.9 -1.7 2.0 1.2 1.2 2.0 2.8 5.0 3 2 3 0 2.5 000000 991 4.2 0.0 1.6
23 8 S 2 6 10 7.1 4.1 81 9.9 6.2 4.3 4.1 4.0 3.6 3.1 3.3 4.9 1 2 3 0 6.3 000000 983 7.6 0.0 1.2
24 1 W 3 7 05 4.4 1.6 82 7.0 4.4 2.0 3.5 4.0 4.7 4.2 4.2 5.0 1 2 3 0 3.0 000000 982 2.3 0.0 1.4
25 6 SW 3 7 81 3.3 1.8 90 7.0 2.7 0.9 2.2 2.8 3.5 3.9 4.4 5.1 1 3 4 0 4.2 s05000 988 2.5 0.0 1.8
26 6 SW 1 7 02 3.9 1.9 87 7.7 3.1 0.3 2.8 3.4 4.0 4.2 4.5 5.3 1 2 3 0 tr 000000 990 0.0 0.0 0.7
27 2 W 1 7 05 2.5 1.5 93 8.2 1.2 -3.2 1.0 1.7 3.0 3.6 4.5 5.3 6 6 7 0 0.0 000000 996 0.0 0.0 0.4
28 2 00 0 7 10 1.1 0.8 98 5.4 0.3 -4.6 0.8 1.5 2.7 3.2 4.4 5.3 3 5 7 0 0.0 000000 1005 0.0 0.0 0.2
29 1 00 0 6 10 0.5 0.2 98 7.9 -0.2 -4.9 0.7 1.4 2.2 2.8 4.0 5.1 3 5 7 0 3.2 000000 1019 3.5 1.0 1.0
30 8 S 2 7 02 6.7 5.1 90 7.6 0.5 -2.5 4.1 3.9 3.5 3.2 4.0 5.2 1 2 3 0 1.5 000002 1014 2.2 0.0 0.1
31 8 00 0 4 42 5.8 5.6 98 6.5 5.6 5.4 5.1 5.0 4.7 4.3 4.5 5.2 1 3 3 0 0.2 000001 1023 0.0 0.0 0.2
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Mean
5 3.2 1.4 88 6.9 1.4 -1.7 2.0 2.4 3.1 3.5 4.4 5.8 1006
Total 44.0 43.1 65.8 26.0
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(.) Difference from 1991-2000 average used by the Weather Observers Network. Rainfall was 44% of average
Temperatures (air, grass and soil) Weather (No. days occurrence) and 45% of 1971-2000 ave.
Mean maximum 6.9 (-0.9) Sleet/snow falling 1 (-1.1) Most in a day: 10.4mm on 3rd.
Mean minimum 1.4 (-1.3) Snow lying (at 09GMT) 0 (-0.4) No. days with:
Mean 4.2 (-1.1) Hail <5 mm 0 [-2.3] >=0.2 mm 14 (- 4.6)
No. days <0.0C 10 (+4.1) Hail >=5 mm 1 [all hail] >=1.0 mm 11 (- 3.6)
Mean grass min -1.7 (-1.5) Thunder heard 0 (-0.6) >=5.0 mm 2 (- 4.4)
Lowest grass min -8.3 (-1.8) Gales 0 No. dry days 12 (+ 8.8)
No. days <0.0C 20 (+5.3) Fog (at 09GMT) 0
Mean soil 30cm 3.5 (-1.4) Lysimeter:
PE -5.4 mm
Highest maximum 10.6C (-1.4) on 1st. Lowest minimum -2.6C (-0.2) on 17th. PWB 49.4 mm
Minimum relative humidity: 46% on 13-14th. PWS 51.2 mm
* Driest Jan since 1997 (6.6mm driest on record) and 7th driest in records. PWD -1.8 mm
* Mean 4.2C coldest since 1997 (3.9C). Mean max 6.9C coldest since 1991 (6.6C). Piche: 26.0 ml
* Mean max and min 7th coldest in records since 1979. Mean min 1.4C coldest since 1991 (6.6C) and 6th coldest in records.
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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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
42 fog becoming thinner, 80 slght rain shower, 81 moderate shower of rain.
Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
'Recording Atmospheric Depositions on Grass' page.
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 2001
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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 1 7 05 4.4 2.1 85 6.8 0.5 -2.8 3.0 3.4 4.0 4.2 4.8 5.4 1 2 4 0 3.9 000000 1027 8.0 0.0 0.5
02 8 W 1 4 10 5.5 5.5 100 7.8 4.4 3.2 5.0 5.0 5.2 4.6 4.8 5.2 1 2 3 0 12.2 000000 1016 4.5 0.0 0.3
03 6 NW 2 5 10 5.3 4.8 97 8.5 5.0 1.5 5.0 5.2 5.4 5.2 5.2 5.4 1 2 3 0 9.3 000000 1004 7.8 0.0 0.2
04 8 E 2 5 63 4.0 3.5 97 9.5 3.2 1.2 4.5 4.8 5.1 5.2 5.3 5.7 2 3 3 0 8.1 000000 992 6.0 0.0 0.2
05 8 S 1 5 80 5.2 5.0 98 9.8 3.9 3.3 5.1 5.3 5.5 5.4 5.5 5.8 1 3 3 0 5.2 000000 987 5.8 0.0 1.1
06 7 SW 7 6 05 8.5 4.7 77 9.6 5.2 4.6 6.3 6.2 6.0 6.0 5.8 6.0 1 1 3 0 5.4 0000G0 979 4.4 0.0 3.0
07 8 SW 4 5 80 7.5 6.4 93 7.5 6.7 6.1 6.5 6.5 6.5 6.5 6.0 6.1 2 3 3 0 15.6 000000 987 10.0 0.0 0.9
08 4 NE 3 7 01 1.5 -2.3 76 4.0 1.2 -0.3 1.5 2.8 4.6 5.0 6.2 6.5 1 0 4 0 0.0 000000 999 0.0 4.8 1.0
09 5 S 1 7 04 0.7 -1.0 88 8.0 -1.6 -5.2 1.0 2.0 3.4 4.3 5.5 6.5 3 0 7 0 tr 000000 1022 0.0 6.3 2.2
10 8 S 5 7 02 8.0 4.6 79 10.6 0.6 -3.5 4.4 4.0 4.0 4.3 5.2 6.2 1 0 0 0 14.0 000000 1014 8.2 0.0 0.6
11 8 S 2 7 16 8.1 6.8 92 8.5 7.5 7.0 7.5 7.3 6.5 5.9 5.7 6.1 1 2 3 0 26.5 000000 1017 18.2 0.0 0.1
12 8 NE 2 7 10 5.4 4.7 95 8.9 4.5 4.2 5.5 5.8 6.1 6.2 6.0 6.1 1 2 3 0 0.0 000000 1020 0.0 0.0 0.7
13 4 00 0 7 04 2.2 0.3 87 10.6 1.0 -3.2 1.6 2.8 4.7 5.3 6.2 6.4 1 6 7 0 0.0 000000 1038 0.0 0.0 1.1
14 0 00 0 8 02 2.3 -4.8 59 10.8 0.6 -5.4 1.0 2.2 4.0 4.8 6.0 6.4 3 0 7 0 0.0 000000 1033 0.0 0.0 1.7
15 8 SW 1 7 05 4.5 2.5 87 8.6 1.8 -3.3 2.0 2.3 3.5 4.3 5.2 6.3 1 0 4 0 1.5 000000 1032 3.5 0.0 0.2
16 1 00 0 7 10 1.8 1.3 96 7.8 1.5 -2.2 2.0 2.5 4.2 4.8 5.3 6.2 1 4 5 0 0.0 000000 1035 0.0 0.0 0.7
17 5 00 0 7 04 1.7 0.3 91 8.5 -1.0 -5.5 1.1 2.2 3.6 4.5 5.2 6.2 3 0 7 0 0.0 000000 1044 0.0 1.5 0.3
18 5 00 0 7 04 0.0 -1.5 90 7.6 -1.1 -6.0 0.8 1.8 3.2 4.0 5.0 6.1 3 0 7 0 0.7 000000 1043 1.0 7.8 0.4
19 8 S 2 5 60 4.6 4.4 98 7.6 0.0 -3.9 3.0 2.4 3.3 3.9 4.9 6.1 1 3 3 0 0.9 000001 1040 1.5 0.0 0.2
20 7 SW 1 5 42 4.4 4.2 98 7.0 1.2 -0.5 3.8 3.2 4.1 4.3 4.8 6.0 1 2 2 0 0.3 000001 1038 1.2 0.0 0.3
21 8 S 1 4 42 6.5 6.5 100 8.3 4.4 4.4 5.9 5.7 5.4 5.1 5.2 5.8 1 2 2 0 2.0 000002 1032 5.2 0.0 0.2
22 8 NW 1 5 10 6.2 6.0 98 8.1 5.2 1.3 6.0 5.8 5.8 5.6 5.6 6.1 1 2 2 0 1.2 000002 1025 0.7 0.0 0.2
23 7 N 2 6 83 2.6 1.3 91 8.4 1.8 -0.2 3.8 4.5 5.3 5.7 5.8 6.1 1 3 6 0 tr s04000 1015 0.0 0.0 1.7
24 5 NE 1 7 04 1.2 -0.8 87 5.6 0.2 -2.4 1.7 2.5 4.5 5.3 5.8 6.3 1 0 4 0 1.5 s04000 1018 1.3 0.0 1.4
25 8 NE 2 7 02 2.7 -2.2 70 6.6 0.5 -2.7 1.5 2.4 3.8 4.8 5.6 6.4 1 0 6 0 1.7 s03000 1017 3.0 0.0 1.3
26 8 S 4 6 80 3.3 1.8 90 5.0 2.7 1.0 3.4 4.6 4.2 4.8 5.3 6.2 1 3 3 0 1.5 000000 995 3.0 0.0 0.2
27 7 NE 2 5 10 2.5 1.7 95 4.8 0.8 -2.2 3.2 3.5 4.1 4.6 5.3 6.2 1 2 3 0 1.8 s04000 987 3.6 4.2 1.4
28 8 NE 5 5 71 -0.4 -1.6 92 3.0 -0.7 -0.7 1.5 2.5 4.0 4.6 5.1 6.2 7 7 9 2 0.6 s03000 1001 0.5 0.0 1.4
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Mean
7 3.9 2.3 90 7.8 2.1 -0.4 3.5 3.9 4.6 5.0 5.4 6.1 1016
Total 113.9 97.4 24.6 23.5
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(.) Difference from 1991-2000 average used by the Weather Observers Network. Rainfall was 129% of average
Air temperatures Weather (No. days occurrence) and 152% of 1971-2000 ave.
Mean maximum 7.8 (-0.5) Sleet/snow falling 5 (+1.9) Most in a day: 26.5mm on 11th.
Mean minimum 2.1 (-0.7) Snow lying (at 09GMT) 1 (-0.1) No. days with:
Mean 5.0 (-0.6) Hail <5 mm 5 [+1.2] >=0.2 mm 20 (+ 1.5)
No. days <0.0C 4 (-0.9) Hail >=5 mm 0 [all hail] >=1.0 mm 16 (+ 2.4)
Mean grass min -0.4 (-1.2) Thunder heard 0 (-0.5) >=5.0 mm 8 (+ 1.6)
Lowest grass min -6.0 (-1.0) Gales 1 No. dry days 6 (- 1.5)
No. days <0.0C 17 (+5.0) Fog (at 09GMT) 0
Mean soil 30cm 5.0 (-0.3) Lysimeter:
PE -0.3 mm
Highest maximum 10.8C on 14th. Lowest minimum -1.6 on 9th. PWB 114.2 mm
Minimum relative humidity: 47% on 14th. PWS 114.8 mm
* Coldest February since 1996. Mean (5.0C) 11th coldest on 23y record. PWD -0.6 mm
* With 113.9mm not as wet as Feb 2000 (143.4mm) but only 13 wetter in records since 1928. Piche: 23.5 ml
* Most days with snow/sleet since 1996.
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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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
10 mist, 16 precipitation within sight, 42 fog has thinned, 60 intermittent sl. rain, 63 continuous moderate rain,
71 continuous fall of snowflakes, 80 slight rain shower, 83 slight sleet shower, 87 shower of ice pellets.
Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
'Recording Atmospheric Depositions on Grass' page.
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 2001
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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 2 NE 2 8 02 -0.4 -6.5 63 3.8 -0.9 -3.4 0.8 1.8 3.0 4.1 5.0 6.1 5 6 6 1 0.0 000000 1001 0.0 10.4 0.6
02 0 NE 1 7 05 -1.5 -3.1 89 5.4 -4.1 -8.7 0.5 1.5 2.6 3.6 4.9 6.0 3 0 7 0 0.0 000000 1001 0.0 16.0 0.8
03 1 SE 1 7 05 -2.5 -5.6 79 5.7 -4.5 -9.0 0.2 1.4 2.5 3.2 4.6 5.9 3 0 7 0 0.0 000000 997 0.0 17.1 0.8
04 0 00 0 7 04 -3.0 -5.4 83 6.5 -5.0 -10.2 0.0 1.2 2.2 2.9 4.0 5.6 3 0 7 0 0.0 000000 996 0.0 15.0 1.0
05 1 S 2 7 04 3.3 0.1 79 9.4 -3.0 -6.5 0.4 1.3 2.0 2.7 3.9 5.5 3 0 7 0 0.0 000000 1012 0.0 0.0 2.1
06 4 SE 2 7 04 7.1 1.1 66 14.2 0.2 -5.0 1.0 1.7 2.6 3.2 3.9 5.4 1 0 4 0 3.1 000000 1010 3.8 0.0 2.8
07 8 S 4 5 10 9.3 8.5 87 12.5 7.1 5.1 7.5 6.7 5.3 4.8 4.5 5.3 1 2 3 0 0.5 000000 999 0.3 0.0 2.0
08 6 S 2 6 15 8.7 7.2 90 13.5 7.8 6.2 7.0 6.7 6.2 5.9 5.3 5.3 1 3 3 0 2.2 000000 995 1.5 0.0 2.1
09 7 SW 1 5 10 7.7 7.5 99 10.0 7.4 6.8 7.5 7.3 7.0 6.6 6.0 5.8 1 2 3 0 3.6 000000 995 3.0 0.0 0.5
10 8 SW 2 4 51 9.0 9.0 100 10.2 7.7 7.7 8.3 7.9 7.5 7.0 6.5 6.1 1 3 3 0 1.1 000002 992 0.8 0.0 0.2
11 7 SE 1 7 80 8.0 7.6 97 10.5 6.8 4.5 7.6 7.5 7.5 7.3 6.9 6.5 1 3 3 0 0.2 000000 999 0.0 0.0 0.6
12 5 SW 2 7 03 5.1 2.6 84 7.4 2.9 0.3 4.6 5.3 6.6 7.1 7.0 6.8 1 1 1 0 1.5 000000 999 2.8 0.0 1.0
13 3 N 1 5 10 4.8 4.1 95 11.5 2.1 -0.8 4.5 5.0 6.1 6.6 6.8 7.0 1 2 4 0 0.0 004000 997 0.0 0.0 0.9
14 5 W 1 6 01 5.7 4.1 89 12.5 3.5 -1.6 6.0 5.8 6.4 6.8 6.8 6.8 1 0 4 0 tr 000000 1003 0.0 0.0 1.2
15 6 00 0 7 04 3.9 3.4 97 8.6 1.0 -4.0 3.5 4.5 6.0 6.8 7.0 7.0 1 0 5 0 0.3 000000 1008 0.0 0.0 0.9
16 8 E 3 5 25 5.5 3.8 89 7.5 3.9 3.7 6.1 6.2 6.5 6.8 6.9 7.1 1 2 3 0 0.1 000000 1008 0.0 0.0 1.1
17 8 E 3 7 02 2.7 1.1 89 4.4 1.4 0.8 4.1 4.6 5.8 6.4 6.8 7.1 1 2 3 0 1.2 s00000 1004 2.2 0.0 0.7
18 6 NE 4 7 70 3.0 0.0 81 6.0 1.2 -0.4 3.6 4.0 5.2 5.9 6.5 7.1 1 2 4 0 0.0 s00000 1006 0.0 0.0 1.4
19 5 SE 1 7 03 2.2 -1.2 78 8.9 -1.7 -6.6 1.4 2.7 4.5 5.5 6.4 7.0 3 0 7 0 0.0 000000 1015 0.0 5.5 1.8
20 7 E 6 7 02 3.0 -2.8 66 7.0 1.1 -3.6 2.5 3.3 4.8 5.6 6.2 7.0 1 0 0 0 1.6 000000 1009 1.8 0.0 1.8
21 8 E 6 5 70 1.6 0.5 93 7.5 0.8 0.2 2.8 3.5 4.6 5.2 6.1 6.9 1 3 9 0 3.6 s020G0 994 5.2 0.0 0.8
22 8 SW 2 2 46 7.0 7.0 100 9.2 1.6 1.1 6.0 5.6 5.2 5.5 5.9 6.8 1 2 2 0 0.1 000002 996 0.0 0.0 0.3
23 7 SE 1 7 05 9.2 8.0 90 11.8 6.6 6.0 7.4 6.8 6.5 6.2 6.3 6.8 1 2 3 0 0.1 000000 995 0.0 0.0 0.5
24 2 NE 1 7 10 8.0 6.9 93 12.5 5.2 3.3 7.3 7.0 7.3 7.2 6.8 6.9 1 2 2 0 0.0 000001 1000 0.0 0.0 1.0
25 7 E 2 7 05 5.4 3.0 84 8.9 3.1 0.8 6.6 6.9 7.5 7.8 7.3 7.0 1 0 1 0 0.0 000000 1005 0.0 0.0 1.1
26 5 E 1 6 05 5.4 0.5 71 10.0 2.3 -1.2 6.0 6.2 7.0 7.5 7.6 7.3 1 0 4 0 1.4 000000 1009 1.8 0.0 2.1
27 8 SE 2 7 02 5.0 2.8 86 7.6 4.5 3.6 6.0 6.5 7.1 7.4 7.5 7.4 1 2 3 0 4.2 000000 1000 6.0 0.0 0.7
28 3 S 1 7 01 5.3 4.6 95 11.2 3.5 0.1 5.5 6.0 6.7 7.1 7.3 7.5 1 2 3 0 0.0 000000 989 0.0 0.0 1.0
29 7 N 1 6 03 5.7 5.2 97 9.7 2.6 -0.5 6.4 6.4 7.1 7.4 7.5 7.5 1 0 4 0 0.2 000000 993 0.2 0.0 0.6
30 5 W 1 7 05 6.5 4.2 85 11.2 3.5 0.5 6.0 6.3 7.2 7.6 7.6 7.6 1 0 1 0 4.1 000000 1010 3.6 0.0 1.8
31 8 SW 6 5 60 10.0 9.6 97 14.0 6.5 6.5 9.3 8.8 8.2 8.1 7.8 7.6 1 3 3 0 5.9 000000 1005 2.2 0.0 0.9
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Mean
5 4.9 2.8 87 9.3 2.4 -0.1 4.7 5.0 5.6 6.0 6.2 6.6 1001
Total 35.0 35.2 64.0 35.1
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(.) Difference from 1991-2000 average used by the Weather Observers Network. Rainfall was 41% of average
Air temperatures Weather (No. days occurrence) and 41% of 1971-2000 ave.
Mean maximum 9.3 (-0.8) Sleet/snow falling 3 (+2.7) Most in a day: 5.9mm on 31st.
Mean minimum 2.4 (-1.8) Snow lying (at 09GMT) 1 (+0.7) No. days with:
Mean 5.9 (-1.3) Hail <5 mm 3 [-0.7] >=0.2 mm 16 (- 1.6)
No. days <0.0C 6 (+4.5) Hail >=5 mm 0 [all hail] >=1.0 mm 12 (- 0.5)
Mean grass min -0.1 (-2.4) Thunder heard 0 (-0.4) >=5.0 mm 1 (- 4.8)
Lowest gr. min -10.2 (-5.8) Gales 1 No. dry days 11 (+ 2.1)
No. days <0.0C 14 (+4.8) Fog (at 09GMT) 1
Mean soil 30cm 6.0 (-1.1) Lysimeter:
PE 12.8 mm
Highest maximum 14.2C on 6th. Lowest minimum -5.0 on 4th. PWB 22.1 mm
Minimum relative humidity: 44% on 3rd. PWS 25.7 mm
* Driest March (35.0mm) since '93 (27.0mm) and 12th driest on record since 1928. PWD -3.6 mm
* Driest month since Jul '99 (26.1mm), May '98 (25.3mm), Apr '97 (30.8mm) and Jan '97 (6.6mm).Piche: 35.1 ml
* Mean 5.9C coldest Mar since '96 (5.6C). Grass min (-10.2C) lowest in Mar on record. Low min (-5.0C) lowest since '86 (-5.2C).
---------------------------------------------------------------------------------------------------------------------------
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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
15, 16 precip. within sight (far, near), 25 rain shower in past hour, 46 fog thicker in past hour,
51 continuous slight drizzle, 60 intermittent sl. rain, 61 cont. sl. rain, 70 intermittent snow, 80 sl. rain shower,
81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
'Recording Atmospheric Depositions on Grass' page.
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 2001
---------------------------------------------------------------------------------------------------------------------------
-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 S 3 7 05 9.5 7.0 84 15.3 6.6 4.2 8.7 8.3 8.6 8.6 8.2 7.8 1 0 1 0 tr 000000 1018 0.0 0.0 2.6
02 7 S 4 6 60 13.0 10.1 83 14.1 9.4 6.4 11.0 10.1 9.7 9.4 8.7 7.8 1 0 3 0 tr 000000 1004 0.0 0.0 1.7
03 4 SW 4 7 05 8.0 3.6 74 11.4 4.0 -0.2 7.1 7.0 8.1 8.8 8.8 8.1 1 0 4 0 11.1 000000 1008 9.2 0.0 1.7
04 6 NW 3 7 10 6.4 5.3 92 13.0 4.1 3.8 7.6 7.6 8.3 8.8 8.8 8.3 1 2 3 0 2.0 004000 1001 1.1 0.0 1.2
05 8 S 2 5 10 5.5 4.3 92 10.1 3.6 -0.3 6.5 7.0 8.0 8.8 8.8 8.3 1 3 3 0 14.4 s00000 1003 7.5 0.0 1.2
06 8 SW 3 4 10 9.0 9.0 100 10.2 4.8 4.3 8.6 8.5 8.3 8.6 8.8 8.6 2 3 3 0 12.7 000000 996 8.8 0.0 0.4
07 8 SW 1 4 53 6.1 5.9 98 10.5 5.3 3.0 7.2 7.5 8.0 8.6 8.6 8.5 1 3 3 0 2.9 000000 993 1.9 0.0 0.3
08 7 W 3 6 03 8.0 6.0 88 8.8 2.2 -1.7 7.4 7.7 8.2 8.6 8.6 8.5 1 0 4 0 7.7 000000 1019 5.2 0.0 0.6
09 8 S 4 5 10 8.8 7.5 92 12.5 5.0 4.4 7.5 7.6 8.3 8.8 8.5 8.5 1 1 3 0 3.2 000000 1013 2.6 0.0 0.6
10 8 NW 2 6 10 8.3 8.1 99 12.0 7.0 6.2 8.6 8.5 8.6 8.8 8.5 8.5 1 2 3 0 0.2 000000 1016 0.5 0.0 0.7
11 2 N 2 7 03 7.3 5.5 88 10.4 3.4 0.3 7.5 7.2 8.5 9.3 8.9 8.6 1 0 1 0 tr 000000 1029 0.0 0.0 1.1
12 8 S 2 7 02 8.2 4.8 79 10.8 3.1 -0.5 8.3 8.2 8.9 9.5 9.5 8.8 1 0 4 0 0.1 000000 1029 0.0 0.0 0.7
13 8 SE 1 6 05 9.0 7.3 89 10.6 6.6 5.1 10.0 9.4 9.3 9.6 9.5 8.8 1 0 1 0 1.1 000000 1031 1.7 0.0 0.5
14 8 W 2 6 02 9.6 9.2 97 12.0 7.2 6.8 10.0 9.4 9.4 9.8 9.6 8.9 1 2 3 0 8.4 000002 1026 7.5 0.0 0.4
15 7 NW 4 7 01 8.5 6.6 88 12.1 7.0 6.8 10.3 9.7 9.6 9.9 9.6 8.9 1 2 3 0 0.0 000000 1015 0.0 0.0 1.0
16 7 N 3 7 01 7.0 4.5 84 9.5 4.8 2.6 7.4 8.1 9.2 10.0 9.8 9.1 1 2 1 0 0.0 000000 1020 0.0 0.0 1.7
17 7 W 3 7 03 8.0 4.6 79 8.2 1.8 -1.4 8.6 8.0 9.0 10.0 9.9 9.2 1 0 4 0 1.6 000000 1021 3.8 0.0 1.0
18 7 N 4 7 87 4.7 0.0 71 8.4 1.7 -0.6 6.4 6.5 8.0 9.3 9.8 9.2 1 0 4 0 tr s03000 1015 0.0 0.0 2.2
19 5 N 4 7 02 6.5 2.6 76 10.0 2.6 -0.5 6.4 6.2 7.8 9.2 9.4 9.3 1 0 4 0 0.2 003000 1016 0.2 0.0 1.8
20 4 NE 4 8 01 6.3 2.1 75 9.4 2.6 -0.1 7.0 6.7 8.0 9.3 9.5 9.2 1 0 4 0 0.0 000000 1017 0.0 0.0 1.8
21 7 SW 2 7 03 7.5 2.7 72 10.0 1.0 -3.0 7.1 6.8 8.0 9.7 9.6 9.3 1 0 4 0 3.7 000000 1016 11.5 0.0 1.6
22 8 S 2 7 61 6.1 4.2 88 7.0 5.0 4.2 7.5 7.5 8.5 9.2 9.5 9.3 1 3 3 0 6.5 000000 999 9.3 0.0 0.4
23 7 NW 2 7 10 6.4 5.5 94 12.3 2.4 -1.4 7.5 7.8 8.1 8.9 9.2 9.3 1 2 3 0 tr 000000 1001 0.0 0.0 1.5
24 8 SE 1 7 60 8.5 5.9 84 9.3 4.1 -0.5 7.7 7.7 8.5 9.3 9.5 9.2 1 1 3 0 6.9 000000 997 5.0 0.0 0.7
25 5 S 2 7 01 9.1 7.4 89 12.4 6.8 4.4 7.9 8.0 8.6 9.3 9.4 9.2 1 2 3 0 1.3 000000 997 1.3 0.0 1.1
26 7 NW 1 5 05 7.7 6.6 93 13.8 5.2 2.0 9.4 9.2 9.9 10.0 9.8 9.2 1 2 3 0 0.0 000000 1010 0.0 0.0 1.1
27 7 SW 2 7 05 8.7 6.5 86 13.4 4.6 1.0 8.2 8.4 9.5 10.1 9.9 9.4 1 0 1 0 8.8 000000 1011 3.8 0.0 1.3
28 6 W 3 7 03 7.6 6.3 83 11.4 5.0 2.4 8.1 8.7 9.8 10.2 10.0 9.6 1 2 3 0 8.5 004000 1002 5.6 0.0 1.0
29 8 E 1 6 83 3.6 3.4 98 11.1 3.0 1.4 8.2 8.3 9.1 10.0 10.0 9.6 2 3 3 0 2.5 s00000 1000 1.9 0.0 1.0
30 6 NE 2 7 01 7.7 6.2 90 11.5 3.5 0.3 8.8 8.8 9.5 10.0 10.0 9.5 1 2 3 0 0.0 000000 1014 0.0 0.0 1.1
31
---------------------------------------------------------------------------------------------------------------------------
Mean
7 7.7 5.6 87 11.0 4.4 2.0 8.1 8.0 8.7 9.3 9.3 8.9 1011
Total 103.8 88.4 0.0 34.0
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1991-2000 average used by the Weather Observers Network. Rainfall was 140% of average
Air temperatures Weather (No. days occurrence) and 180% of 1971-2000 ave.
Mean maximum 11.0 (-1.3) Sleet/snow falling 3 (+1.1) Most in a day: 14.4mm on 5th.
Mean minimum 4.4 (-0.7) Snow lying (at 09GMT) 0 (-0.2) No. days with:
Mean 7.7 (-1.0) Hail <5 mm 4 [+1.1] >=0.2 mm 19 (+ 2.0)
No. days <0.0C 0 (-0.6) Hail >=5 mm 0 [all hail] >=1.0 mm 17 (+ 3.8)
Mean grass min 2.0 (-1.3) Thunder heard 0 (-0.2) >=5.0 mm 9 (+ 4.0)
Lowest grass min -3.0 (-0.1) Gales 0 No. dry days 4 (- 5.2)
No. days <0.0C 11 (+5.7) Fog (at 09GMT) 0
Mean soil 30cm 9.3 (-0.1) Lysimeter:
PE 24.7 mm
Highest maximum 15.3C on 1st. Lowest minimum 1.0 on 21st. PWB 79.1 mm
Minimum relative humidity: 55% on 1st and 18th. PWS 84.5 mm
* Wettest April (103.8mm) since 1994 (127.1mm) and 6th wettest in records since 1928. PWD -5.4 mm
* Mean 7.7C coldest since 1994 (7.7C) joint coldest next to 6.8C in 1986. Piche: 34.0 ml
* Mean max 11.0C same as 2000; second only to 10.7C in 1986. Mean min 4.4C (4.3C in 2000); second only to 6.8C in 1986.
---------------------------------------------------------------------------------------------------------------------------
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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
16 precipitation within sight, 17 thunderstorm no precip., 21 rain in past hour, 42 fog thinner in past hour,
53 continuous slight drizzle, 60 intermittent sl. rain, 61 cont. sl. rain, 63 cont. moderate rain, 80 sl. rain shower,
81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
'Recording Atmospheric Depositions on Grass' page.
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 2001
---------------------------------------------------------------------------------------------------------------------------
-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 NE 2 6 05 8.3 7.0 92 12.4 4.5 0.5 9.0 9.0 9.9 10.6 10.2 9.9 1 0 1 0 0.0 000000 1024 0.0 0.0 1.2
02 7 SW 1 7 05 10.5 6.0 74 17.0 4.8 2.0 10.6 10.5 10.8 11.2 10.8 10.0 1 0 1 0 0.7 000000 1024 1.8 0.0 1.7
03 7 N 1 7 01 7.7 6.2 90 12.5 6.3 3.9 10.6 10.7 11.4 11.7 11.1 10.0 1 2 3 0 0.0 000000 1014 0.0 0.0 1.3
04 6 N 2 7 02 9.0 6.9 86 12.1 5.6 3.8 9.0 9.8 11.1 12.0 11.5 10.2 1 0 1 0 0.0 000000 1017 0.0 0.0 1.4
05 1 N 1 7 02 10.5 6.5 76 13.5 3.5 -0.2 10.0 9.2 10.7 12.0 11.5 10.2 1 0 1 0 0.0 000000 1024 0.0 0.0 1.7
06 1 E 2 8 03 8.8 5.5 80 12.4 5.2 2.7 8.8 9.7 11.5 12.2 11.8 10.8 1 0 1 0 0.0 000000 1029 0.0 0.0 1.8
07 1 E 2 8 05 9.0 5.7 80 12.2 3.6 0.6 10.5 9.4 11.0 12.3 12.0 11.0 1 0 1 0 0.0 000000 1032 0.0 0.0 1.6
08 1 SE 1 7 05 10.8 4.6 66 15.4 5.0 1.0 8.8 9.8 11.5 12.5 12.2 11.0 0 0 1 0 0.0 000000 1031 0.0 0.0 1.7
09 3 E 2 7 05 9.0 4.5 73 15.7 5.1 1.5 9.2 10.3 12.0 13.0 12.5 11.2 0 0 1 0 4.0 000000 1026 2.6 0.0 2.1
10 7 NE 3 5 05 11.3 10.1 93 17.8 8.3 8.0 12.5 12.5 13.1 13.5 12.8 11.5 1 2 3 0 0.3 000t00 1020 0.3 0.0 1.4
11 7 00 0 6 05 17.0 13.5 80 21.5 11.3 10.8 15.2 14.3 14.1 14.0 13.1 11.5 1 0 3 0 0.0 000t00 1020 0.0 0.0 1.8
12 2 NE 1 5 05 18.9 13.9 73 23.7 14.0 9.5 14.8 14.5 14.6 14.5 13.5 11.8 1 0 1 0 0.0 000000 1022 0.0 0.0 3.4
13 3 E 3 7 05 15.5 10.8 74 21.6 10.5 8.8 12.5 12.8 14.7 15.1 13.9 12.0 0 0 1 0 2.7 000t00 1013 2.4 0.0 1.7
14 8 S 1 5 60 11.0 10.2 95 13.0 9.7 9.0 14.0 14.5 14.8 15.0 14.1 12.2 1 3 3 0 10.6 000000 1010 9.0 0.0 0.4
15 8 NE 1 7 10 9.5 9.1 97 11.6 8.5 8.4 12.3 12.5 13.4 14.3 14.0 12.5 1 2 3 0 2.5 000000 1005 0.0 0.0 0.6
16 7 SW 1 5 25 10.0 9.0 93 13.0 8.0 6.0 12.0 12.2 13.0 13.8 13.8 12.5 1 0 3 0 2.6 000000 995 2.8 0.0 0.5
17 8 N 2 7 10 9.2 8.8 97 13.4 6.8 4.0 11.2 11.8 12.7 13.5 13.5 12.5 1 1 3 0 tr 000000 999 0.0 0.0 1.3
18 7 W 2 7 02 10.0 7.9 87 13.6 4.3 0.8 10.8 11.0 12.0 13.2 13.2 12.5 1 0 3 0 0.0 000000 1019 0.0 0.0 1.0
19 7 W 1 7 02 12.1 8.7 80 15.5 9.0 6.0 13.5 12.9 13.0 13.4 13.0 12.3 1 0 1 0 0.0 000000 1025 0.0 0.0 1.5
20 7 S 1 6 01 13.3 11.4 88 16.3 10.2 8.2 15.0 13.8 13.5 13.8 13.3 12.3 0 0 1 0 0.0 000000 1028 0.0 0.0 1.1
21 4 S 1 7 02 16.3 11.7 74 18.0 8.9 5.7 16.0 13.6 13.2 13.8 13.3 12.3 0 0 1 0 0.0 000000 1027 0.0 0.0 1.9
22 3 NE 1 7 05 17.5 10.4 63 22.5 9.7 6.5 16.5 14.0 13.9 14.2 13.6 12.5 0 0 1 0 0.0 000000 1025 0.0 0.0 2.8
23 5 NE 1 7 05 18.2 11.1 63 19.4 11.0 7.5 17.5 15.4 15.0 15.2 14.2 12.5 0 0 1 0 0.0 000000 1025 0.0 0.0 2.6
24 1 NE 1 7 05 19.7 12.2 62 24.0 10.8 8.0 18.8 15.9 15.7 15.6 14.8 12.8 0 0 1 0 0.0 000000 1025 0.0 0.0 3.1
25 6 S 1 7 05 17.1 11.4 69 20.5 11.5 7.8 16.2 16.1 16.5 16.5 15.2 13.0 0 0 1 0 0.3 000000 1020 1.2 0.0 1.9
26 8 S 2 4 51 13.3 13.1 99 16.5 12.3 11.2 15.5 15.8 16.1 16.2 15.2 13.4 1 3 3 0 6.7 000000 1018 6.9 0.0 0.5
27 8 S 2 4 51 13.4 13.4 100 14.5 11.8 11.6 15.0 15.0 15.0 15.7 15.2 13.5 1 3 3 0 16.3 000002 1019 6.3 0.0 0.1
28 8 SW 5 4 10 14.0 13.8 99 15.5 12.9 12.7 14.8 14.7 14.8 15.1 14.8 13.6 1 3 3 0 tr 000002 1017 0.0 0.0 1.1
29 1 W 4 7 05 14.7 11.0 78 18.4 10.2 8.2 15.5 13.4 13.7 14.8 14.7 13.7 1 0 3 0 0.0 000000 1022 0.0 0.0 2.5
30 6 SW 4 7 05 14.9 12.0 83 17.0 9.8 6.6 16.0 15.0 15.0 15.2 14.8 13.6 1 0 0 0 1.8 000000 1019 2.3 0.0 1.0
31 7 NW 2 7 02 12.4 10.1 86 16.0 7.0 4.4 15.4 14.2 14.5 15.2 15.0 13.8 1 0 3 0 0.2 000000 1021 0.1 0.0 1.3
---------------------------------------------------------------------------------------------------------------------------
Mean
5 12.7 9.6 82 16.3 8.4 6.0 13.1 12.7 13.3 13.8 13.3 12.0 1020
Total 48.7 35.7 0.0 48.0
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1991-2000 average used by the Weather Observers Network. Rainfall was 74% of average
Air temperatures Weather (No. days occurrence) and 85% of 1971-2000 ave.
Mean maximum 16.3 (+0.6) Sleet/snow falling 0 (-0.3) Most in a day: 16.3mm on 27th.
Mean minimum 8.4 (+0.8) Snow lying (at 09GMT) 0 (-0.1) No. days with:
Mean 12.4 (+0.7) Hail <5 mm 0 [-1.4] >=0.2 mm 12 (- 0.9)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 [all hail] >=1.0 mm 8 (- 1.6)
Mean grass min 6.0 ( 0.0) Thunder heard 3 (+2.2) >=5.0 mm 3 (- 1.5)
Lowest grass min -0.2 (-0.3) Gales 0 No. dry days 17 (+ 3.5)
No. days <0.0C 1 (+0.1) Fog (at 09GMT) 0
Mean soil 30cm 13.8 (+0.6) Lysimeter:
PE 58.9 mm
Highest maximum 24.0C on 24th. Lowest minimum 3.5C on 5th. PWB -10.2 mm
Minimum relative humidity: 51% on 24th. PWS 30.3 mm
* Driest May (48.7mm) since 1998 (25.3mm) but there have been 25 drier in records since 1928. PWD -40.5 mm
*
* Piche: 48.0 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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
16 precipitation within sight, 17 thunderstorm no precip., 25 rain shower in past hour,
51 continuous slight drizzle, 60 intermittent sl. rain, 61 continuous sl. rain, 63 cont. moderate rain,
81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
'Recording Atmospheric Depositions on Grass' page.
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 2001
---------------------------------------------------------------------------------------------------------------------------
-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 NW 1 7 02 12.5 10.2 86 14.1 10.3 9.7 15.1 14.8 15.9 15.3 15.0 13.8 1 0 3 0 1.2 000000 1024 2.8 0.0 0.9
02 8 NE 2 6 25 9.9 8.7 92 13.5 9.5 9.7 13.0 13.5 14.2 14.8 14.9 13.8 1 1 3 0 tr 000000 1018 0.0 0.0 1.8
03 3 N 2 8 02 10.4 6.1 75 16.0 6.4 2.3 14.5 12.7 13.5 14.8 14.8 13.8 0 0 1 0 0.0 000000 1027 0.0 0.0 2.0
04 7 W 2 7 02 12.8 8.6 76 14.4 8.7 6.3 15.5 14.6 15.0 15.2 15.0 13.8 0 0 0 0 0.0 000000 1026 0.0 0.0 1.5
05 8 SW 3 7 02 12.4 8.8 79 18.5 9.6 7.1 14.4 14.2 14.8 15.0 14.9 13.8 0 0 0 0 tr 000000 1018 0.0 0.0 2.2
06 8 SW 4 5 60 11.5 9.5 88 12.6 10.1 9.2 15.2 15.2 15.6 15.6 15.0 13.9 0 0 3 0 2.5 000000 1011 5.3 0.0 0.8
07 6 W 3 7 03 11.1 6.7 74 13.2 5.0 2.6 13.5 12.2 13.1 14.6 14.9 13.9 1 0 1 0 tr 000000 1010 0.0 0.0 1.5
08 6 N 2 7 03 9.5 4.6 71 13.6 3.5 0.9 13.1 11.8 12.8 14.2 14.6 13.9 0 0 3 0 0.4 000000 1015 0.3 0.0 1.7
09 8 SW 3 7 02 10.6 7.5 81 15.6 7.4 5.3 13.9 13.2 13.8 14.3 14.6 13.8 0 2 3 0 tr 000000 1014 0.0 0.0 1.8
10 1 NE 2 8 02 10.7 6.5 75 13.7 7.1 3.7 15.1 12.7 13.2 14.5 14.5 13.8 0 0 0 0 0.0 000000 1019 0.0 0.0 1.7
11 8 SW 2 7 02 12.5 8.7 78 14.2 6.8 3.7 15.5 14.5 14.5 14.8 14.6 13.8 0 0 0 0 0.0 000000 1022 0.0 0.0 1.5
12 8 S 2 7 05 13.6 10.4 81 16.2 10.3 9.5 14.8 14.0 14.2 14.7 14.5 13.8 0 0 0 0 0.0 000000 1021 0.0 0.0 1.6
13 7 00 0 7 05 14.7 7.9 64 15.9 9.1 7.2 16.5 14.6 14.4 14.8 14.6 13.8 0 0 1 0 0.0 000000 1016 0.0 0.0 1.5
14 7 E 1 6 05 14.8 10.0 73 16.9 8.1 4.6 15.1 14.2 14.2 14.9 14.8 13.8 0 0 1 0 14.1 000000 1012 6.1 0.0 0.7
15 7 S 1 7 01 15.2 13.6 90 18.7 11.5 11.0 17.0 15.1 14.7 15.0 14.8 13.8 1 2 3 0 4.2 000000 1004 2.2 0.0 0.8
16 7 NE 2 5 05 13.3 11.8 91 16.4 11.2 8.4 15.5 15.1 15.0 15.7 15.1 13.9 1 0 3 0 0.3 000000 1004 2.3 0.0 0.9
17 6 N 3 7 01 11.4 8.2 80 14.3 9.4 9.0 15.2 14.2 14.8 15.7 15.2 14.0 1 0 3 0 0.0 000000 1018 0.0 0.0 1.9
18 7 S 2 7 05 14.2 8.0 66 17.0 6.5 4.0 15.5 14.2 14.8 15.8 15.3 14.0 1 0 1 0 0.4 000000 1027 2.4 0.0 2.1
19 8 S 4 5 60 14.0 13.1 94 16.2 11.7 10.8 15.5 15.2 15.7 15.8 15.3 14.0 1 2 3 0 5.5 000000 1024 4.3 0.0 1.5
20 8 W 3 6 10 14.5 12.7 89 18.6 12.1 11.6 16.1 15.0 14.8 15.3 15.1 14.1 1 1 3 0 0.0 000002 1018 0.0 0.0 1.6
21 7 N 1 7 02 11.8 7.0 73 15.5 7.4 4.5 15.5 14.3 14.8 15.6 15.2 14.1 1 0 1 0 0.0 000000 1021 0.0 0.0 1.3
22 7 NE 1 7 05 11.7 7.4 75 18.5 9.8 9.3 16.0 15.3 15.6 15.8 15.3 14.2 1 0 1 0 0.0 000000 1020 0.0 0.0 1.8
23 6 S 1 7 05 18.5 11.0 62 19.9 10.3 8.2 19.0 16.5 16.0 16.2 15.6 14.3 0 0 1 0 0.0 000000 1017 0.0 0.0 1.6
24 7 S 3 7 05 17.2 13.3 78 21.5 11.0 8.5 17.5 16.0 16.0 16.2 15.8 14.4 0 0 1 0 0.0 000000 1020 0.0 0.0 2.0
25 7 SW 1 7 05 18.2 14.4 82 20.3 12.5 9.8 19.3 17.2 17.0 17.0 16.1 14.6 0 0 1 0 1.4 000000 1024 0.6 0.0 1.8
26 6 NE 3 5 05 18.2 15.3 83 25.8 14.0 12.1 20.1 18.3 17.7 17.6 16.5 14.8 1 1 3 0 tr 000T00 1014 0.0 0.0 1.8
27 8 S 2 4 10 15.7 15.0 96 19.8 14.2 14.2 17.8 18.0 18.5 18.2 17.0 15.0 0 0 2 0 tr 000002 1009 0.0 0.0 1.6
28 8 SW 2 7 02 15.3 12.6 84 20.0 12.9 12.0 18.2 17.5 17.2 17.6 17.0 15.2 0 0 0 0 0.3 000000 1012 0.2 0.0 2.4
29 8 S 6 6 80 17.0 14.6 86 19.7 15.3 14.8 18.2 17.8 17.8 17.7 16.9 15.2 0 1 3 0 0.0 000000 1012 0.0 0.0 2.5
30 6 SW 3 7 05 16.3 12.3 77 19.8 13.5 12.9 19.0 17.5 17.2 17.3 16.9 15.3 0 0 0 0 0.0 000000 1016 0.0 0.0 2.4
---------------------------------------------------------------------------------------------------------------------------
Mean
7 13.6 10.2 80 17.0 9.8 8.1 16.0 15.0 15.2 15.7 15.3 14.1 1017
Total 30.3 000102 26.5 0.0 49.2
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1991-2000 average used by the Weather Observers Network. Rainfall was 41% of average
Air temperatures Weather (No. days occurrence) and 46% of 1971-2000 ave.
Mean maximum 17.0 (-0.3) Sleet/snow falling 0 ( 0.0) Most in a day: 14.1mm on 14th.
Mean minimum 9.8 ( 0.0) Snow lying (at 09GMT) 0 ( 0.0) No. days with:
Mean 13.4 (-0.2) Hail <5 mm 0 [-0.2] >=0.2 mm 10 (- 5.5)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 [all hail] >=1.0 mm 6 (- 4.4)
Mean grass min 8.1 (-0.2) Thunder heard 1 (-0.1) >=5.0 mm 2 (- 2.6)
Lowest grass min 0.9 (-2.2) Gales 0 No. dry days 14 (+ 2.3)
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 0
Mean soil 30cm 15.7 (+0.3) Lysimeter:
PE 55.3 mm
Highest maximum 25.8C on 26th. Lowest minimum 3.5 on 8th. PWB -25.0 mm
Minimum relative humidity: 54% on 3rd. PWS 18.8 mm
* Driest June since 1988 (19.8mm) and 1976 (29.7mm). Only 10 drier in records since 1929. PWD -43.8 mm
* Driest any month since Jul 1999 (26.1mm), Jan 1997 (6.6mm) and Aug 1995 (9.2mm).
* Minimum of 3.5C and grass 0.9C on 8th lowest since 1991 (2.0C and 0.1C respectively). Piche: 49.2 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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
16 precipitation within sight, 17 thunderstorm no precip., 21 rain in past hour, 42 fog thinner in past hour,
50 slight drizzle, 60 intermittent sl. rain, 61 continuous sl. rain, 63 cont. moderate rain, 80 sl. rain shower,
81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
'Recording Atmospheric Depositions on Grass' page.
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 2001
---------------------------------------------------------------------------------------------------------------------------
-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 S 2 6 01 18.4 15.2 82 22.2 13.9 12.8 20.0 18.3 17.8 17.5 17.0 15.3 0 0 0 0 0.0 000000 1026 0.0 0.0 1.9
02 1 S 2 7 05 19.0 16.2 84 23.5 12.4 10.7 21.3 18.3 17.9 17.8 17.1 15.5 0 0 0 0 0.0 000000 1029 0.0 0.0 1.5
03 7 SW 1 5 10 16.5 15.1 92 21.3 13.4 11.5 19.5 19.0 18.8 18.3 17.5 15.6 0 0 2 0 11.2 000T02 1020 6.2 0.0 0.7
04 8 NE 2 2 46 14.1 14.1 100 21.0 14.0 14.0 16.5 17.5 18.0 18.1 17.5 15.5 1 3 3 0 tr 000002 1012 0.0 0.0 0.8
05 5 NE 4 6 04 19.0 14.4 76 19.8 14.1 13.1 21.3 18.2 17.5 18.5 17.7 16.0 1 0 1 0 0.0 000000 1015 0.0 0.0 1.9
06 6 NE 3 5 05 16.6 15.9 96 19.9 11.6 10.4 19.0 17.8 18.0 18.8 17.8 16.1 0 0 1 0 0.9 000000 1012 1.1 0.0 0.6
07 8 NW 1 3 53 15.0 15.0 100 16.0 14.4 13.0 18.0 18.2 18.5 18.8 18.1 16.0 1 3 3 0 7.7 000001 1008 9.0 0.0 0.2
08 8 NW 1 5 50 13.0 13.0 100 14.8 12.5 12.5 15.8 15.2 17.1 17.8 17.8 16.2 1 3 3 0 tr 000000 1011 0.0 0.0 0.8
09 7 W 1 7 01 14.8 10.0 73 19.0 11.5 9.5 17.8 16.4 16.4 17.4 17.3 16.2 1 0 3 0 4.1 000000 1015 3.0 0.0 2.2
10 3 SW 5 7 01 15.5 12.8 84 17.2 12.5 9.0 17.8 16.5 16.8 17.5 17.3 16.2 1 0 3 0 7.5 000000 1001 2.6 0.0 2.0
11 8 W 5 5 60 11.7 11.1 96 15.6 10.1 7.6 14.2 14.8 15.6 17.0 17.1 16.0 1 3 3 0 1.6 000000 1003 1.8 0.0 1.4
12 6 SW 4 8 02 13.8 9.5 75 15.2 10.4 7.1 16.0 14.7 15.2 16.5 16.8 16.0 1 0 3 0 1.2 000000 1007 1.9 0.0 1.2
13 8 NW 1 7 60 12.7 10.4 86 15.6 9.9 5.9 16.0 15.2 15.5 16.3 16.5 15.8 1 1 3 0 tr 000000 1006 0.0 0.0 1.1
14 7 N 1 7 02 11.6 8.8 83 15.5 7.5 5.8 14.5 14.3 15.2 16.3 16.5 15.8 1 0 1 0 0.7 000000 1007 0.3 0.0 1.3
15 6 N 2 7 02 12.2 8.4 77 17.5 5.9 4.1 15.1 14.0 15.0 16.3 16.5 15.6 1 0 1 0 0.0 000000 1015 0.0 0.0 1.6
16 1 S 1 8 03 15.4 6.9 57 18.4 7.2 4.5 15.4 13.2 14.4 16.0 16.2 15.6 0 0 1 0 0.0 000000 1017 0.0 0.0 2.1
17 8 E 3 7 05 13.4 8.0 70 16.0 9.4 6.5 14.2 14.5 15.5 16.3 16.3 15.5 0 0 1 0 4.1 000000 1003 4.8 0.0 1.6
18 8 NE 6 6 60 12.7 10.2 85 14.7 11.7 10.9 13.6 14.0 15.0 15.8 16.0 15.5 1 3 3 0 1.3 0000G0 1001 2.5 0.0 1.9
19 6 NE 3 7 05 13.3 10.2 82 15.3 10.9 9.0 15.0 13.3 14.1 15.3 15.8 15.3 1 0 1 0 0.0 000000 1010 0.0 0.0 1.5
20 8 SW 2 8 03 15.0 8.5 65 16.8 9.4 6.2 14.5 13.5 14.4 15.3 15.6 15.2 1 0 1 0 0.7 000000 1014 1.0 0.0 1.8
21 8 SW 3 7 02 15.8 13.5 86 17.5 12.5 11.3 16.2 15.6 15.5 15.8 15.6 15.1 1 0 3 0 0.2 000000 1010 0.0 0.0 1.5
22 8 SW 1 5 80 14.6 13.3 92 20.7 13.9 12.8 16.0 15.7 15.7 16.0 15.8 15.1 1 1 3 0 tr 000000 1014 0.0 0.0 2.0
23 3 S 4 7 03 16.7 13.0 79 18.8 12.6 9.3 16.8 15.8 16.5 16.6 16.1 15.1 0 0 1 0 0.3 000000 1019 0.8 0.0 2.4
24 8 SW 2 5 60 14.5 14.0 97 17.5 12.7 11.5 15.8 15.7 16.1 16.2 16.1 15.1 1 3 3 0 1.6 000000 1018 1.7 0.0 0.6
25 7 SW 2 7 02 17.5 13.3 76 22.8 14.0 13.0 17.2 16.0 16.0 16.2 16.1 15.1 1 1 3 0 0.0 000000 1020 0.0 0.0 2.1
26 5 SW 2 5 05 18.0 16.0 80 21.3 13.4 10.8 18.9 17.4 17.4 17.4 16.5 15.2 0 0 2 0 0.0 000001 1019 0.0 0.0 2.2
27 6 SE 1 8 03 19.3 13.0 66 23.8 11.8 9.8 19.8 17.5 17.7 17.8 17.1 15.5 0 0 1 0 0.0 000000 1019 0.0 0.0 2.0
28 4 NE 1 8 03 21.0 16.1 73 25.9 13.7 11.1 19.1 17.7 18.1 18.0 17.2 15.8 0 0 1 0 0.0 000000 1023 0.0 0.0 2.5
29 6 SW 4 5 01 17.6 15.2 86 21.8 16.9 15.1 20.4 19.4 19.3 18.8 17.8 16.0 0 0 0 0 0.0 000000 1024 0.0 0.0 1.5
30 3 SW 2 7 05 17.7 11.7 68 23.0 13.9 11.2 20.8 19.3 18.9 18.8 17.9 16.0 0 0 0 0 2.8 000000 1026 7.0 0.0 2.8
31 7 N 2 7 01 14.1 13.2 94 18.0 13.2 13.5 18.4 18.5 19.0 18.8 18.0 16.1 1 2 3 0 0.0 000000 1026 0.0 0.0 1.9
---------------------------------------------------------------------------------------------------------------------------
Mean
6 15.5 12.5 83 18.9 12.0 10.1 17.3 16.3 16.7 17.2 16.9 15.6 1014
Total 45.9 43.7 0.0 49.6
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1991-2000 average used by the Weather Observers Network. Rainfall was 77% of average
Air temperatures Weather (No. days occurrence) and 72% of 1971-2000 ave.
Mean maximum 18.9 (-0.5) Sleet/snow falling 0 ( 0.0) Most in a day: 11.2mm on 3rd.
Mean minimum 12.0 ( 0.0) Snow lying (at 09GMT) 0 ( 0.0) No. days with:
Mean 15.4 (-0.3) Hail <5 mm 0 [-0.6] >=0.2 mm 15 ( 0.0)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 [all hail] >=1.0 mm 10 (- 0.3)
Mean grass min 10.1 (-0.4) Thunder heard 1 (+0.8) >=5.0 mm 3 (- 1.0)
Lowest grass min 4.1 (-1.7) Gales 0 No. dry days 12 (+ 0.6)
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 1
Mean soil 30cm 17.2 ( 0.0) Lysimeter:
PE 53.9 mm
Highest maximum 25.9C on 28th. Lowest minimum 5.9 on 15th. PWB -8.0 mm
Minimum relative humidity: 50% on 28th. PWS 29.0 mm
* Rainfall 45.9 mm below average (77%), 10th driest July on record since 1929. PWD -37.0 mm
* Abs min (5.9C) on 15th lowest since 1980 and 1984 (5.6C), 3rd lowest on record since 1979.
* Grass min (4.1C) on 15th lowest since 1989 (4.0C). Piche: 49.1 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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
16 precipitation within sight, 17 thunderstorm no precip., 21 rain in past hour, 42 fog thinner in past hour,
46 fog thicker in past hour, 60 intermittent sl. rain, 61 continuous sl. rain, 63 cont. moderate rain, 80 sl. rain shower,
81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
'Recording Atmospheric Depositions on Grass' page.
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 2001
---------------------------------------------------------------------------------------------------------------------------
-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 SE 1 7 04 18.0 10.6 62 24.2 10.1 7.4 17.0 16.2 17.7 18.4 18.0 16.4 0 0 1 0 0.0 000000 1027 0.0 0.0 2.5
02 8 00 0 6 05 19.1 16.3 84 20.6 15.0 13.4 20.2 19.5 19.2 18.8 18.2 16.5 0 0 1 0 2.6 000000 1015 4.2 0.0 0.2
03 8 N 1 5 60 12.1 11.5 96 19.0 12.1 12.4 16.6 17.4 18.2 18.4 18.1 16.5 1 3 3 0 0.6 000000 1011 0.5 0.0 1.7
04 3 S 2 8 03 15.0 11.3 78 19.0 10.6 7.8 16.5 16.3 17.0 18.1 18.1 16.8 0 0 1 0 3.3 000t00 1014 0.2 0.0 1.3
05 6 W 1 7 05 15.0 12.3 84 19.5 11.0 8.3 17.0 16.3 17.0 17.8 17.8 16.7 1 0 1 0 7.3 000000 1015 4.4 0.0 2.0
06 8 NW 1 7 02 15.4 14.5 95 16.7 11.5 11.2 18.0 17.2 17.4 18.0 17.8 16.5 1 2 3 0 9.2 000000 1008 6.0 0.0 0.1
07 8 E 1 5 63 11.9 11.5 98 18.7 11.1 9.2 14.2 15.0 16.9 17.4 17.5 16.5 1 3 3 0 7.0 000000 1001 4.8 0.0 0.6
08 7 NW 1 6 01 14.0 12.2 87 17.8 11.7 11.1 16.0 15.7 16.2 17.1 17.3 16.5 1 1 3 0 1.6 000000 1000 2.0 0.0 1.1
09 7 N 2 7 05 13.6 11.2 85 17.5 10.3 8.4 16.0 15.7 16.2 17.2 17.3 16.3 1 1 3 0 0.0 000000 1013 0.0 0.0 1.5
10 5 NW 2 8 03 14.2 10.8 80 18.8 8.5 6.1 14.2 14.2 15.7 17.1 17.2 16.3 1 0 1 0 6.3 000000 1024 5.8 0.0 2.0
11 8 S 4 6 42 16.1 16.1 100 16.7 13.7 12.1 16.5 16.5 17.0 17.3 17.3 16.3 2 2 3 0 4.4 000002 1021 5.3 0.0 0.1
12 8 SW 3 2 46 15.7 15.7 100 17.0 15.2 15.0 16.7 16.5 16.5 17.1 17.0 16.3 2 3 3 0 6.1 000002 1014 7.8 0.0 0.2
13 8 S 3 5 02 17.0 16.8 99 18.1 15.0 14.8 17.0 16.8 16.8 17.1 16.9 16.2 1 2 3 0 0.3 000000 1011 0.2 0.0 0.5
14 7 SW 4 6 02 17.8 16.5 92 20.8 16.2 15.8 18.5 17.5 17.1 17.2 16.9 16.0 1 0 3 0 0.0 000000 1011 0.0 0.0 1.6
15 7 S 1 7 05 17.0 15.3 90 19.5 12.7 10.9 17.3 16.8 17.0 17.4 17.0 16.0 1 0 1 0 11.7 000000 1011 5.8 0.0 0.4
16 7 W 2 7 25 14.5 14.0 97 18.5 13.0 11.9 16.9 16.5 17.0 17.5 17.2 16.2 1 2 3 0 0.3 000000 1010 0.3 0.0 1.6
17 7 SW 2 6 16 15.9 14.5 91 18.1 13.3 12.0 17.0 16.6 17.0 17.5 17.2 16.2 1 2 3 0 3.6 000000 1015 1.0 0.0 1.1
18 8 00 0 7 61 14.5 12.1 86 16.3 13.4 12.4 16.0 16.3 17.0 17.5 17.2 16.1 1 3 3 0 14.5 000000 1012 10.0 0.0 0.3
19 7 00 0 6 10 16.3 16.1 99 19.7 14.1 13.6 17.0 16.5 16.7 17.2 17.2 16.2 1 2 3 0 0.0 000000 1001 0.0 0.0 1.0
20 7 SW 2 7 05 14.5 11.7 83 19.4 11.0 8.3 16.0 15.8 16.8 17.3 17.2 16.2 1 0 1 0 0.0 000000 1012 0.0 0.0 2.6
21 7 S 5 7 03 16.0 11.8 76 18.4 13.3 10.4 15.9 16.1 16.9 17.5 17.3 16.2 1 0 1 0 1.3 000000 1023 2.0 0.0 1.9
22 5 SW 1 7 05 15.9 12.9 82 19.5 10.8 7.5 15.0 14.8 16.0 17.0 17.2 16.2 1 1 1 0 0.0 000000 1021 0.0 0.0 0.7
23 7 S 1 7 05 15.5 12.2 81 19.0 11.6 9.0 16.0 15.5 16.2 17.1 17.0 16.2 1 0 1 0 0.1 000000 1016 0.0 0.0 0.9
24 8 NE 1 5 05 16.5 15.0 91 17.8 12.4 9.5 17.5 16.8 16.8 17.3 17.2 16.2 1 0 1 0 4.7 000000 1016 7.5 0.0 0.2
25 8 N 1 5 10 15.4 15.4 100 17.6 13.0 10.8 16.5 16.3 16.6 17.0 17.0 16.1 1 3 3 0 2.2 000000 1016 1.8 0.0 0.2
26 3 NE 2 7 05 14.7 12.1 85 17.5 11.0 7.8 15.5 14.8 16.0 16.8 16.8 16.2 1 1 1 0 0.0 000000 1020 0.0 0.0 1.5
27 4 N 2 8 03 13.6 11.2 85 16.7 9.3 5.5 14.0 14.2 14.7 16.8 16.8 16.1 1 0 1 0 0.0 000000 1027 0.0 0.0 1.7
28 1 S 1 8 01 14.8 11.9 69 21.8 8.5 5.8 13.9 13.8 15.7 16.7 16.7 16.1 1 0 1 0 0.0 000000 1023 0.0 0.0 2.1
29 5 SW 1 7 05 16.8 11.7 72 22.5 10.3 7.3 16.3 15.0 16.0 16.8 16.8 16.1 0 0 1 0 2.4 000000 1017 2.3 0.0 1.8
30 8 SW 1 6 10 13.2 12.8 98 16.2 12.2 10.2 15.6 16.1 17.0 17.1 17.0 16.0 1 2 3 0 7.2 000000 1012 3.0 0.0 0.4
31 7 N 2 7 01 12.6 11.7 94 17.1 11.8 9.0 14.4 15.0 16.0 16.8 16.8 16.2 1 2 3 0 0.0 000000 1014 0.0 0.0 1.3
---------------------------------------------------------------------------------------------------------------------------
Mean
6 15.2 13.2 88 18.7 12.1 10.2 16.3 16.1 16.7 17.4 17.3 16.3 1015
Total 96.7 74.9 0.0 35.1
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1991-2000 average used by the Weather Observers Network. Rainfall was 130% of average
Air temperatures Weather (No. days occurrence) and 120% of 1971-2000 ave.
Mean maximum 18.7 (-0.8) Sleet/snow falling 0 ( 0.0) Most in a day: 14.5 on 18th.
Mean minimum 12.1 ( 0.0) Snow lying (at 09GMT) 0 ( 0.0) No. days with:
Mean 15.4 (-0.4) Hail <5 mm 0 [-0.2] >=0.2 mm 20 (+ 5.2)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 [all hail] >=1.0 mm 17 (+ 6.0)
Mean grass min 10.2 (-0.1) Thunder heard 1 (-0.3) >=5.0 mm 8 (+ 2.6)
Lowest grass min 5.5 (-0.1) Gales 0 No. dry days 10 (- 1.1)
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 1
Mean soil 30cm 17.4 (+0.2) Lysimeter:
PE 41.7 mm
Highest maximum 24.2C on 1st. Lowest minimum 8.5 on 10th & 28th. PWB 55.0 mm
Minimum relative humidity: 55% on 1st. PWS 64.0 mm
* Rainfall 96.7 mm ranked 31st wettest on record since 1928. Drier than 2000 (132.4 mm). PWD -8.9 mm
* Mean temperature 15.4C equalled 1999 (15.4C) as coolest since 1993 (14.2C).
* Mean max 18.7C coolest since 1994 (18.0C) and ranked 10th on record since 1979. Piche: 35.1 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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
16 precipitation within sight, 17 thunderstorm no precip., 25 shower rain in past hour, 42 fog thinner in past hour,
46 fog thicker in past hr., 60 intermittent sl. rain, 61 continuous sl. rain, 63 cont. moderate rain, 80 sl. rain shower,
81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
'Recording Atmospheric Depositions on Grass' page.
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 2001
---------------------------------------------------------------------------------------------------------------------------
-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 W 3 7 03 14.2 10.2 77 16.8 10.5 7.9 15.5 15.2 16.0 16.7 16.8 16.2 1 0 1 0 4.4 000000 1020 4.8 0.0 0.8
02 8 NW 1 7 01 15.3 14.3 93 17.3 14.2 14.2 17.2 16.4 16.5 16.8 16.8 16.1 1 2 3 0 1.5 000000 1015 2.9 0.0 0.9
03 7 NW 2 7 02 14.5 13.6 94 16.3 11.3 10.9 16.0 15.5 16.2 16.8 16.7 16.1 1 2 3 0 0.8 000000 1015 0.3 0.0 0.7
04 6 N 3 7 03 13.0 10.5 85 16.4 10.8 7.6 14.7 14.7 15.8 16.8 16.8 16.0 1 0 3 0 4.3 000000 1020 4.6 0.0 1.4
05 8 W 1 4 50 14.6 14.6 100 16.4 10.0 7.3 15.0 15.3 16.0 16.7 16.8 16.0 1 3 3 0 8.6 000000 1022 6.0 0.0 0.3
06 7 N 2 7 01 13.2 11.5 90 18.2 10.0 7.9 15.0 15.0 15.7 16.3 16.5 16.0 1 1 3 0 0.2 000000 1021 0.2 0.0 1.1
07 8 W 3 6 25 14.0 13.5 97 18.3 11.7 10.0 15.0 15.0 15.8 16.4 16.5 15.9 1 2 3 0 0.5 000000 1020 0.4 0.0 1.1
08 7 N 4 7 80 12.6 10.1 85 15.5 10.7 8.3 15.0 15.0 15.7 16.3 16.3 15.8 1 0 3 0 tr 000000 1019 0.0 0.0 2.4
09 7 N 4 7 01 12.0 6.8 70 15.1 9.3 6.8 13.0 13.4 14.8 16.1 16.3 15.8 1 0 0 0 0.0 000000 1023 0.0 0.0 1.7
10 7 N 2 7 02 12.2 8.6 79 14.5 10.5 8.8 14.3 14.3 15.0 15.9 16.2 15.8 1 0 1 0 0.1 000000 1024 0.0 0.0 0.8
11 8 NW 2 6 60 14.2 13.3 94 18.0 12.0 10.8 15.2 15.0 15.7 16.0 16.2 15.8 1 2 3 0 0.9 000000 1023 0.8 0.0 0.9
12 8 SW 5 6 60 13.9 10.5 80 14.5 12.4 10.6 14.0 14.4 15.2 16.0 16.1 15.8 1 0 3 0 18.0 000000 1014 13.2 0.0 0.6
13 7 W 5 6 80 10.8 10.0 95 14.7 9.6 6.1 12.3 12.7 14.0 15.2 15.8 15.7 1 2 3 0 1.9 000000 1001 2.1 0.0 1.3
14 6 NW 1 6 03 12.5 11.4 91 14.2 8.0 3.0 11.8 11.8 13.5 14.9 15.4 15.5 1 1 2 0 4.1 000002 1014 2.0 0.0 0.7
15 7 NW 3 7 05 12.0 9.7 86 15.5 9.2 5.6 12.4 12.4 13.5 14.7 15.2 15.3 1 1 3 0 0.8 000000 1015 1.0 0.0 1.1
16 7 NW 2 7 10 12.2 9.7 84 15.6 8.0 3.2 12.5 12.3 13.2 14.5 15.0 15.0 1 2 3 0 0.2 000000 1023 0.2 0.0 1.4
17 6 NE 3 8 01 11.5 7.6 77 13.0 10.5 6.4 12.7 12.8 13.6 14.6 15.1 15.1 1 0 1 0 0.0 000000 1027 0.0 0.0 2.1
18 8 NE 2 7 01 12.5 10.0 85 14.5 10.1 8.1 12.9 13.0 13.6 14.5 14.9 15.0 1 0 0 0 0.2 000000 1025 0.3 0.0 0.9
19 7 N 2 5 80 12.1 11.0 93 15.6 11.6 9.9 13.2 13.6 14.2 14.6 15.0 15.0 1 3 3 0 0.3 000000 1015 0.8 0.0 1.2
20 6 NE 1 7 05 12.7 9.8 82 15.7 11.4 9.3 13.1 13.4 14.4 14.8 15.0 14.9 1 0 1 0 0.0 000000 1018 0.0 0.0 1.1
21 5 NE 1 7 10 12.0 11.6 98 15.5 8.5 5.8 11.8 12.2 13.5 14.5 15.0 14.8 1 0 2 0 0.0 000002 1019 0.0 0.0 0.5
22 8 N 1 7 05 12.3 11.2 93 14.4 10.7 8.0 13.0 13.2 13.9 14.4 14.8 14.8 1 0 1 0 tr 000000 1020 0.0 0.0 0.7
23 1 E 2 7 03 11.4 8.2 80 14.7 8.6 5.3 10.7 11.2 12.8 14.2 14.6 14.8 1 0 1 0 0.5 000000 1020 0.4 0.0 1.1
24 7 NE 2 7 05 12.8 10.7 87 15.0 10.0 6.8 13.0 13.0 13.6 14.2 14.6 14.8 1 2 3 0 0.2 000000 1016 0.2 0.0 1.1
25 5 E 1 5 05 12.0 10.5 90 15.5 10.0 8.0 12.2 12.5 13.4 14.2 14.7 14.5 1 0 1 0 0.0 000000 1016 0.0 0.0 0.9
26 3 00 0 7 05 11.8 9.4 85 17.5 8.2 4.2 11.1 11.7 13.0 13.9 14.5 14.5 1 0 1 0 6.1 000000 1009 7.8 0.0 1.0
27 8 S 2 6 61 15.1 14.6 97 16.5 11.0 7.8 14.2 13.8 14.0 14.2 14.5 14.3 1 3 3 0 6.3 000000 1009 4.5 0.0 0.5
28 4 SE 2 7 03 16.5 12.9 79 22.4 15.1 13.5 15.4 14.8 14.8 14.6 14.6 14.3 1 1 3 0 18.5 000000 1006 3.0 0.0 2.1
29 7 SW 3 7 01 14.0 12.9 93 17.5 13.5 12.0 15.0 15.0 15.1 15.0 15.0 14.3 1 2 3 0 0.1 000T00 1006 0.0 0.0 2.2
30 7 S 6 5 80 14.7 12.5 87 16.7 13.6 12.3 14.4 14.4 14.8 15.0 15.0 14.7 1 3 3 0 19.7 0000G0 998 5.8 0.0 1.7
---------------------------------------------------------------------------------------------------------------------------
Mean
7 13.1 11.0 88 16.1 10.7 8.2 13.7 13.8 14.6 15.3 15.6 15.3 1016
Total 98.2 61.3 0.0 34.3
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1991-2000 average used by the Weather Observers Network. Rainfall was 101% of average
Air temperatures Weather (No. days occurrence) and 107% of 1971-2000 ave.
Mean maximum 16.1 (-1.2) Sleet/snow falling 0 ( 0.0) Most in a day:
Mean minimum 10.7 (+0.5) Snow lying (at 09GMT) 0 ( 0.0) No. days with:
Mean 13.4 (-0.4) Hail <5 mm 0 [-1.4] >=0.2 mm 21 (+ 5.8)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 [all hail] >=1.0 mm 11 (- 1.9)
Mean grass min 8.2 (+0.1) Thunder heard 1 (+0.6) >=5.0 mm 6 (- 0.6)
Lowest grass min 3.0 (+0.3) Gales 1 No. dry days 5 (- 3.6)
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 0
Mean soil 30cm 15.3 (+0.1) Lysimeter:
PE 37.1 mm
Highest maximum 22.4C on 28th. Lowest minimum 8.0 on 14th. PWB 61.1 mm
Minimum relative humidity: 56% on 28th. PWS 65.8 mm
* Mean max 16.1C lowest since 1994 (15.1C). Ranked 4th lowest in records since 1979. PWD -4.6 mm
* Mean min 10.7C lowest since 1996 (10.0C) but ranked 7th highest in records. Lo min 8.0C
* warmest on September record. Mean 13.4C lowest since 1995 (13.3C) rank 11th lowest. Piche: 34.3 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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
16 precipitation within sight, 17 thunderstorm no precip., 21 rain in past hour, 42 fog thinner in past hour,
50 slight drizzle, 60 intermittent sl. rain, 61 continuous sl. rain, 63 cont. moderate rain, 80 sl. rain shower,
81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
'Recording Atmospheric Depositions on Grass' page.
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 2001
---------------------------------------------------------------------------------------------------------------------------
-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 7 5 80 13.2 12.3 94 16.0 12.6 11.1 13.5 14.0 14.4 15.0 15.0 14.6 1 2 3 0 0.0 000TG0 992 0.0 0.0 3.2
02 1 SW 6 6 05 14.1 11.1 82 16.2 13.4 12.1 13.0 13.4 14.0 14.7 14.9 14.8 1 0 0 0 0.0 000000 995 0.0 0.0 2.3
03 8 W 5 7 05 13.0 10.5 85 16.0 11.5 9.5 13.0 13.0 13.7 14.4 14.8 14.7 1 0 1 0 tr 000000 1005 0.0 0.0 1.3
04 6 S 4 7 03 12.9 11.2 89 16.5 12.0 10.5 12.8 13.2 13.8 14.3 14.8 14.6 1 0 3 0 2.1 000000 1008 2.2 0.0 1.8
05 8 S 5 7 10 14.8 14.3 97 18.2 12.7 11.8 14.4 14.1 14.1 14.5 14.6 14.5 1 3 3 0 10.5 000000 1000 3.6 0.0 2.4
06 3 S 6 6 05 13.9 9.6 76 16.6 11.6 10.1 12.1 12.8 13.8 14.4 14.8 14.5 1 1 3 0 3.2 0000G0 995 4.0 0.0 2.1
07 7 SW 3 7 05 12.9 9.8 81 14.6 11.0 9.1 11.6 12.1 13.2 14.2 14.6 14.5 1 2 3 0 11.0 000000 991 7.0 0.0 0.8
08 6 W 4 7 05 12.5 10.8 89 16.0 9.5 7.4 11.5 12.0 13.0 13.8 14.3 14.5 1 2 3 0 6.6 000000 990 6.2 0.0 0.9
09 7 NW 4 6 10 12.2 10.9 92 15.8 10.6 9.0 12.6 12.8 13.4 13.8 14.2 14.2 1 2 3 0 2.1 000000 1008 1.9 0.0 0.8
10 8 SW 5 4 60 13.7 13.5 99 14.5 10.9 8.1 13.4 13.4 13.5 13.9 14.2 14.2 1 3 3 0 4.7 000000 1016 4.0 0.0 0.4
11 8 SW 5 4 53 14.0 14.0 100 15.1 10.9 9.5 13.5 13.5 13.5 13.8 14.1 14.2 1 3 3 0 5.1 000000 1022 9.2 0.0 0.7
12 1 S 3 7 05 15.1 12.0 82 18.5 12.5 11.0 12.5 12.8 13.5 13.8 14.1 14.1 1 2 3 0 0.0 000000 1020 0.0 0.0 1.2
13 7 SE 1 7 10 13.6 12.5 93 16.3 12.1 10.6 13.7 13.7 14.0 14.2 14.2 14.1 1 0 1 0 2.8 000000 1020 3.3 0.0 0.5
14 8 00 0 4 60 14.0 14.0 100 17.2 11.8 9.6 13.5 13.7 14.0 14.2 14.2 14.1 1 3 3 0 1.1 000000 1013 3.1 0.0 1.2
15 7 S 4 7 80 15.0 12.8 87 17.0 12.8 11.7 14.0 14.0 14.2 14.3 14.5 14.1 1 2 3 0 2.5 000000 1002 2.1 0.0 2.0
16 7 S 5 6 02 13.7 9.8 78 16.3 9.8 7.9 11.4 12.0 13.0 13.8 14.2 14.1 1 2 3 0 0.0 000000 1017 0.0 0.0 3.9
17 7 E 2 7 05 15.1 11.6 80 19.3 11.8 9.0 12.6 12.5 13.0 13.8 14.1 14.1 1 0 0 0 2.2 000000 1013 3.8 0.0 3.0
18 2 S 4 7 05 13.5 10.0 80 16.8 11.5 8.8 12.2 12.8 13.5 13.8 14.0 14.1 1 2 3 0 0.0 000000 1006 0.0 0.0 2.5
19 7 E 5 7 03 12.8 8.6 76 15.5 10.3 6.4 11.1 11.5 12.5 13.3 13.9 14.0 1 0 1 0 15.6 000000 1006 7.6 0.0 1.0
20 8 S 1 6 21 11.2 10.8 97 15.0 10.5 8.3 12.0 12.2 12.6 13.2 13.6 13.9 1 2 3 0 0.1 000000 1002 0.0 0.0 0.3
21 7 00 0 7 02 10.2 9.8 97 12.0 7.1 3.4 10.8 10.6 11.5 12.7 13.5 13.8 1 1 1 0 0.0 000000 1006 0.0 0.0 0.1
22 2 S 2 7 10 10.3 9.7 96 16.2 9.3 5.0 10.2 11.1 12.0 12.7 13.2 13.7 1 1 2 0 1.1 000001 1009 2.2 0.0 0.9
23 6 S 4 7 80 13.1 12.0 93 16.5 9.6 6.5 11.9 11.8 12.5 12.8 13.2 13.7 1 2 3 0 4.0 000000 1005 2.6 0.0 1.5
24 5 SW 3 6 25 12.0 10.7 91 15.3 11.5 9.8 12.0 12.0 12.6 12.9 13.2 13.7 1 2 3 0 tr 000000 1010 0.0 0.0 1.2
25 8 S 6 6 02 14.0 11.2 83 14.6 10.3 7.8 12.5 12.3 12.5 13.2 13.2 13.5 1 1 3 0 5.1 0000G0 1013 2.5 0.0 1.2
26 8 SW 2 7 02 11.7 9.5 87 13.7 11.1 9.2 11.0 11.5 12.1 12.8 13.2 13.3 1 2 3 0 1.2 000000 1005 0.9 0.0 1.1
27 1 SW 2 6 05 10.5 9.1 91 15.3 8.7 4.8 9.0 9.8 11.4 12.4 13.2 13.5 1 2 1 0 0.2 000000 1013 0.2 0.0 0.8
28 1 00 0 7 10 8.4 8.2 99 16.1 6.8 2.3 8.2 9.4 11.2 12.2 12.9 13.4 1 2 3 0 0.0 000000 1025 0.0 0.0 1.0
29 8 SW 5 7 05 11.2 9.6 90 14.4 8.4 4.0 10.0 10.3 11.1 11.9 12.6 13.2 1 1 1 0 0.0 000000 1024 0.0 0.0 1.6
30 1 S 6 6 05 14.3 12.1 87 14.5 11.2 10.3 12.1 12.1 12.1 12.2 12.5 13.2 1 0 0 0 4.2 0000G0 1008 3.5 0.0 1.3
31 3 NW 4 7 05 7.6 5.4 86 12.7 6.4 2.5 8.3 9.7 11.3 12.1 12.6 13.0 1 2 3 0 0.3 005000 1021 0.3 0.0 0.9
---------------------------------------------------------------------------------------------------------------------------
Mean
6 12.7 10.9 89 15.8 10.7 8.3 11.9 12.3 12.9 13.5 13.9 14.0 1008
Total 85.7 70.2 0.0 43.9
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1991-2000 average used by the Weather Observers Network. Rainfall was 74% of average
Air temperatures Weather (No. days occurrence) and 76% of 1971-2000 ave.
Mean maximum 15.8 (+2.1) Sleet/snow falling 0 (-0.2) Most in a day: 15.6mm on 19th.
Mean minimum 10.7 (+3.2) Snow lying (at 09GMT) 0 ( 0.0) No. days with:
Mean 13.2 (+2.6) Hail <5 mm 0 [-0.4] >=0.2 mm 20 (+ 0.6)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 1 [all hail] >=1.0 mm 18 (+ 2.1)
Mean grass min 8.3 (+3.2) Thunder heard 1 (+0.1) >=5.0 mm 6 (- 1.9)
Lowest grass min 2.3 (+3.3) Gales 4 No. dry days 8 (- 0.2)
No. days <0.0C 0 (-2.9) Fog (at 09GMT) 0
Mean soil 30cm 13.5 (+1.8) Lysimeter:
PE 11.1 mm
Highest maximum 19.3C on 17th. Lowest minimum 6.4 on 31st. PWB 74.6 mm
Minimum relative humidity: 60% on 17th. PWS 74.8 mm
* Monthly mean temperature 13.2C warmest on record for October. PWD -0.2 mm
* Mean min 10.7C warmest on Oct record. Mean max 15.8C 2nd only to Oct 1995 that was 16.0C.
* Rainfall 85.7mm lowest in Oct since 1997 (53.7mm) and ranked 20th lowest since 1928. Piche: 43.9 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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
16 precipitation within sight, 17 thunderstorm no precip., 21 rain in past hour, 42 fog thinner in past hour,
53 continuous moderate drizzle, 60 intermittent sl. rain, 61 cont. sl. rain, 63 cont. moderate rain, 80 sl. rain shower,
81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
'Recording Atmospheric Depositions on Grass' page.
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 2001
---------------------------------------------------------------------------------------------------------------------------
-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 1 7 05 8.7 7.7 93 13.6 5.0 0.4 7.6 8.4 10.0 11.3 12.3 12.9 1 1 1 0 0.0 000000 1037 0.0 0.0 1.0
02 8 W 2 7 02 11.0 8.1 83 14.7 8.4 4.1 10.0 10.2 10.8 11.3 12.1 12.9 1 0 1 0 0.0 000000 1039 0.0 0.0 1.0
03 8 SW 3 7 05 11.4 9.8 90 11.4 9.0 6.8 10.2 10.2 10.9 11.5 12.1 12.8 1 0 1 0 1.1 000000 1035 2.5 0.0 0.6
04 7 NW 2 7 01 8.5 7.0 90 11.5 4.5 1.1 8.5 9.0 10.2 11.2 11.9 12.6 1 2 3 0 0.7 000000 1027 0.3 0.0 0.5
05 7 W 2 7 03 5.8 3.9 88 11.5 3.4 0.8 6.3 7.3 9.2 10.8 11.8 12.8 1 1 1 0 1.6 000000 1027 3.6 0.0 1.0
06 7 W 2 7 02 9.5 7.8 89 11.0 5.8 5.8 9.3 9.6 10.1 10.6 11.4 12.3 1 2 3 0 6.4 000000 1017 7.8 0.0 0.2
07 8 NW 4 7 02 10.3 9.7 96 10.5 8.7 6.9 10.0 10.2 10.5 10.8 11.4 12.2 1 2 3 0 9.6 000000 1012 9.5 0.0 0.7
08 6 N 6 7 01 5.2 0.3 70 6.0 4.5 2.5 6.4 7.8 9.5 10.6 11.3 12.1 1 1 4 0 0.3 s050G0 1007 0.3 0.0 4.1
09 4 NE 4 7 01 4.5 -2.2 62 7.7 3.4 1.4 3.8 5.2 7.5 9.3 10.8 12.0 1 0 0 0 0.1 003000 1027 0.5 0.0 1.4
10 8 W 2 2 46 6.8 6.8 100 10.8 2.1 -1.5 6.4 6.5 7.3 8.8 10.0 11.8 1 3 3 0 0.6 000002 1030 0.5 0.0 0.3
11 8 N 1 6 10 10.8 10.8 100 13.3 6.8 3.5 9.4 9.2 9.0 9.3 10.0 11.3 1 2 3 0 9.2 000000 1029 8.0 0.0 0.3
12 8 NW 1 6 52 10.7 10.7 100 12.1 9.5 6.2 10.0 9.9 9.8 10.0 10.2 11.3 1 3 3 0 1.7 000000 1016 2.8 0.0 0.7
13 7 NE 5 7 05 5.0 0.2 72 8.4 4.4 2.4 5.8 7.3 9.0 10.0 10.2 11.3 1 1 4 0 0.7 004000 1029 1.3 0.0 1.4
14 2 NE 1 7 10 7.7 7.1 96 11.0 2.1 -1.7 7.0 7.4 8.0 9.1 10.2 11.3 1 2 3 0 0.0 000000 1036 0.0 0.0 0.4
15 3 NW 1 7 05 7.0 5.9 93 11.5 4.0 0.0 6.5 7.0 7.8 8.9 10.0 11.2 1 1 1 0 0.0 000000 1040 0.0 0.0 0.5
16 8 00 0 7 05 9.4 8.2 92 10.0 7.0 4.8 9.0 9.0 9.0 9.2 9.9 11.1 1 1 1 0 tr 000000 1042 0.0 0.0 0.4
17 8 00 0 7 05 7.3 6.4 94 9.5 7.0 6.3 8.1 8.5 9.1 9.5 10.0 11.0 1 1 3 0 0.0 000000 1037 0.0 0.0 0.7
18 8 00 0 7 05 7.1 5.3 88 8.2 6.7 5.9 8.0 8.3 9.0 9.4 10.0 10.9 1 0 1 0 2.3 000000 1029 3.2 0.0 0.3
19 7 00 0 4 42 7.6 7.6 100 9.8 6.2 4.7 8.0 8.2 8.8 9.3 10.0 10.8 1 2 3 0 tr 000000 1027 0.0 0.0 0.1
20 8 SW 2 7 10 8.7 8.3 97 11.6 5.2 0.3 7.7 8.0 8.5 9.2 10.0 10.8 1 2 3 0 0.4 000000 1028 0.5 0.0 0.7
21 8 SW 4 5 10 11.6 11.2 98 12.0 8.7 8.3 10.0 9.8 9.6 9.8 10.1 10.8 1 2 3 0 4.9 000000 1024 7.0 0.0 0.5
22 7 N 1 7 01 7.4 5.4 87 9.8 6.6 3.6 8.5 9.0 9.8 10.0 10.3 10.6 1 2 3 0 0.0 000000 1025 0.0 0.0 1.0
23 8 SW 1 7 05 6.2 4.1 86 10.6 3.9 0.2 6.7 7.4 8.5 9.4 10.1 10.8 1 0 1 0 1.4 000000 1028 4.5 0.0 0.4
24 8 SW 1 2 46 10.6 10.6 100 12.1 6.2 6.0 10.0 9.6 9.5 9.6 10.0 10.8 1 3 3 0 9.5 000001 1025 7.3 0.0 0.1
25 8 NW 3 5 60 9.1 8.9 99 9.1 9.1 8.5 11.0 11.0 10.5 10.1 10.1 10.8 1 3 3 0 2.5 000000 1015 2.0 0.0 0.3
26 1 00 0 7 04 2.7 2.4 98 9.0 1.8 -2.6 3.5 5.2 7.5 9.2 10.2 10.8 1 2 7 0 3.8 000000 1018 4.5 0.0 0.9
27 8 SW 6 5 61 9.0 8.0 93 9.4 2.7 -1.5 7.2 7.0 7.3 8.4 10.0 10.7 1 3 3 0 2.9 004000 998 2.0 0.0 0.6
28 7 W 2 7 05 6.5 5.1 91 11.8 4.2 0.8 5.5 6.0 7.2 8.0 9.2 10.3 1 2 1 0 31.6 000000 1015 16.0 0.0 0.6
29 8 SW 4 3 51 11.8 11.8 100 12.7 6.5 5.1 10.4 10.0 9.0 9.0 9.0 10.0 1 3 3 0 15.0 000003 1007 10.0 0.0 0.2
30 8 S 5 4 61 12.7 12.7 100 13.0 10.0 6.5 11.3 11.0 10.2 10.0 10.2 10.2 2 3 3 0 1.4 000000 999 3.6 0.0 0.3
---------------------------------------------------------------------------------------------------------------------------
Mean
7 8.4 7.0 92 10.8 5.8 3.2 8.1 8.4 9.1 9.8 10.5 11.4 1024
Total 107.7 97.7 0.0 21.2
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1991-2000 average used by the Weather Observers Network. Rainfall was 83% of average
Air temperatures Weather (No. days occurrence) and 86% of 1971-2000 ave.
Mean maximum 10.8 (+0.4) Sleet/snow falling 1 (+0.6) Most in a day: 31.6 mm on 28th
Mean minimum 5.8 (+0.7) Snow lying (at 09GMT) 0 ( 0.0) No. days with:
Mean 8.3 (+0.6) Hail <5 mm 3 [-0.1] >=0.2 mm 21 (- 1.5)
No. days <0.0C 0 (-1.3) Hail >=5 mm 1 [all hail] >=1.0 mm 16 (- 1.4)
Mean grass min 3.3 (+0.8) Thunder heard 0 (-0.9) >=5.0 mm 6 (- 3.1)
Lowest grass min -2.6 ( 0.0) Gales 1 No. dry days 6 (+ 1.9)
No. days <0.0C 4 (-5.4) Fog (at 09GMT) 2
Mean soil 30cm 9.8 (+1.3) Lysimeter:
PE 13.0 mm
Highest maximum 14.7C on 2nd. Lowest minimum 1.8 on 26th. PWB 94.7 mm
Minimum relative humidity: 58% on 8th. PWS 94.8 mm
* Warmest Nov since 1997. Mean max 10.8C ranked 5th warmest since 1979 but 1994 was 12.4C. PWD -0.1 mm
* Mean min 5.8C ranked 4th warmest but 1994 was 7.9C. Mean 8.3C 4th warmest but 1994 was 10.1C.
* With 107.7 mm was driest Nov since 1995 with 65.1 mm. Ranked 27th driest since 1928. Piche: 21.4 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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
16 precipitation within sight, 17 thunderstorm no precip., 21 rain in past hour, 42 fog thinner in past hour,
46 fog thicker in past hr., 51 continuous slight drizzle, 52 intermittent sl. dr., 60 intermittent sl. rain,
61 cont. sl.rain, 81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
'Recording Atmospheric Depositions on Grass' page.
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 2001
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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 NW 2 7 10 8.1 7.7 97 8.8 8.1 5.1 9.0 9.8 10.1 10.2 10.0 10.0 1 2 3 0 0.2 000000 1006 0.0 0.0 0.7
02 7 SE 2 7 03 5.6 2.1 78 8.0 1.5 -2.7 5.0 5.9 7.6 9.0 10.0 10.2 1 1 4 0 0.0 000000 1024 0.0 0.0 2.0
03 6 S 4 7 05 7.4 3.9 79 10.3 4.2 -1.1 4.8 5.3 6.7 8.0 9.5 10.2 1 0 0 0 9.1 0000G0 1016 6.5 0.0 1.9
04 6 W 3 7 05 6.0 4.4 89 11.6 5.8 2.1 5.8 6.9 8.0 8.4 8.9 10.1 1 2 3 0 2.9 000000 1007 4.1 0.0 1.4
05 7 SW 5 5 10 11.3 10.3 94 11.3 4.8 0.0 8.5 7.9 7.4 7.9 8.7 10.0 1 2 3 0 0.6 000000 999 0.0 0.0 0.2
06 8 00 0 7 04 5.3 4.6 95 11.5 4.3 0.1 5.5 6.1 7.2 8.0 8.7 9.9 1 2 3 0 3.0 000000 1030 5.2 0.0 1.1
07 8 S 2 7 60 11.1 10.5 96 11.6 5.3 4.2 9.3 9.0 8.4 8.3 8.7 9.9 1 3 3 0 0.5 000000 1031 0.5 0.0 1.1
08 6 00 0 7 04 6.5 3.7 82 12.4 6.1 1.1 6.7 8.0 8.6 8.8 9.2 9.9 1 1 1 0 0.0 000000 1037 0.0 0.0 1.2
09 4 00 0 7 04 4.1 -4.2 55 9.2 3.0 -2.7 2.5 4.2 6.2 7.8 8.7 9.8 3 0 5 0 0.0 000000 1038 0.0 0.0 1.2
10 0 00 0 7 04 4.6 -4.6 51 12.0 1.3 -3.2 1.5 2.9 5.0 6.5 8.3 9.8 3 0 5 0 0.0 000000 1038 0.0 0.0 2.2
11 0 00 0 7 04 6.5 1.5 71 12.3 4.6 -0.2 2.6 3.6 5.2 6.2 7.7 9.5 1 0 1 0 0.0 000000 1040 0.0 0.0 1.7
12 0 NE 2 8 04 8.6 3.0 75 10.2 4.7 0.2 3.4 4.1 5.2 6.1 7.3 9.1 1 0 1 0 0.0 000000 1039 0.0 0.0 1.4
13 1 E 3 7 04 5.0 2.5 84 7.8 4.6 1.3 2.7 3.5 5.0 5.9 7.2 8.9 1 0 5 0 0.0 000000 1036 0.0 0.0 0.6
14 1 NE 1 7 04 2.0 -2.4 73 5.9 2.0 -3.2 1.5 3.0 4.5 5.6 7.0 8.7 1 4 5 0 0.0 000000 1040 0.0 4.5 1.2
15 1 E 3 7 04 2.0 -0.8 82 5.1 -1.3 -6.5 0.5 1.7 3.2 4.8 6.5 8.6 3 0 7 0 0.1 000000 1042 0.0 5.2 0.6
16 7 E 1 7 04 4.5 4.0 97 6.1 2.0 -1.1 3.5 3.8 4.2 4.9 6.2 8.3 1 2 3 0 0.0 000000 1043 0.0 0.0 0.8
17 1 NE 1 7 04 0.1 -1.1 92 5.5 -0.7 -5.5 0.8 1.5 3.8 4.7 6.3 8.1 1 0 7 0 0.5 000000 1043 0.7 3.8 0.4
18 7 00 0 5 60 4.8 4.8 100 6.0 0.2 -4.1 3.2 3.5 4.0 4.6 5.8 7.8 1 3 3 0 1.8 000000 1043 3.8 0.0 0.1
19 7 NW 1 7 04 4.0 3.8 98 7.0 3.4 -0.2 3.8 4.2 5.0 5.1 6.0 7.6 1 2 3 0 0.3 000000 1037 1.4 0.0 0.3
20 5 00 0 7 04 -0.4 -1.3 94 6.5 -0.9 -5.0 1.4 2.6 4.5 5.2 6.2 7.8 1 2 5 0 0.0 000000 1035 0.0 5.0 0.9
21 8 NW 3 7 10 6.6 4.2 85 7.5 -0.4 -2.1 4.3 4.5 4.6 4.9 6.0 7.8 1 2 5 0 1.3 s00000 1018 2.0 0.0 1.5
22 3 NE 4 8 01 2.3 -4.1 63 3.7 2.0 -1.2 2.0 3.2 4.3 5.2 6.2 7.8 1 0 0 0 tr 000000 1018 0.0 0.0 2.0
23 7 W 1 7 87 0.8 -0.6 90 7.3 -0.8 -5.2 1.0 1.8 3.1 4.3 5.8 7.5 3 5 9 0 6.6 003000 1023 6.1 6.2 0.8
24 8 NW 3 7 10 7.3 6.6 96 8.5 0.8 -1.6 5.0 4.9 4.8 4.8 5.6 7.5 1 2 3 0 7.1 000000 1012 6.2 0.0 0.2
25 7 N 4 6 85 3.5 1.7 88 5.0 2.8 0.8 4.1 5.0 5.4 5.5 6.0 7.2 1 2 4 0 12.5 s04000 1002 7.6 0.0 0.5
26 7 W 1 7 85 -0.3 -0.6 98 6.5 -0.5 -4.1 1.7 2.5 3.8 4.8 6.2 7.3 7 7 9 6 4.8 sL3000 1011 5.3 5.5 0.8
27 8 W 2 7 02 6.5 6.1 97 8.3 -0.3 -1.3 4.3 4.0 4.0 4.3 5.4 7.2 5 2 6 0 1.3 000000 1003 0.3 0.0 0.6
28 6 W 4 7 02 3.5 0.4 81 5.5 3.4 -0.2 3.2 4.3 5.2 5.2 5.8 7.1 1 2 4 0 0.6 000000 1006 0.3 0.0 0.6
29 6 N 3 8 22 1.6 -1.5 80 3.9 0.5 -2.9 1.6 2.7 4.0 4.7 5.8 7.2 1 2 9 0 1.8 s04000 1002 1.8 0.0 0.8
30 7 N 1 7 22 1.4 0.6 94 3.3 0.7 -3.8 1.0 1.8 3.0 4.1 5.3 7.1 6 7 9 2 1.1 sL5000 1010 0.6 0.0 1.2
31 2 00 0 8 04 -1.0 -3.2 85 4.4 -1.5 -6.0 0.6 1.5 2.6 3.5 5.0 6.9 6 6 9 1 0.0 0L0000 1032 0.0 10.5 0.4
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Mean
5 4.5 2.0 85 7.8 2.2 -1.6 3.6 4.3 5.3 6.0 7.1 8.5 1025
Total 56.1 52.4 40.9 30.4
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(.) Difference from 1991-2000 average used by the Weather Observers Network. Rainfall was 45% of average
Air temperatures Weather (No. days occurrence) and 49% of 1971-2000 ave.
Mean maximum 7.8 (-0.1) Sleet/snow falling 5 (+2.4) Most in a day: 12.5mm on 25th
Mean minimum 2.2 (-0.9) Snow lying (at 09GMT) 3 (+1.8) No. days with:
Mean 5.0 (-0.5) Hail <5 mm 4 [-0.1] >=0.2 mm 18 (- 2.4)
No. days <0.0C 8 (+2.4) Hail >=5 mm 10 [all hail] >=1.0 mm 12 (- 4.4)
Mean grass min -1.6 (-2.2) Thunder heard 0 (-0.8) >=5.0 mm 4 (- 5.0)
Lowest grass min -6.5 (+0.2) Gales 1 No. dry days 11 (+ 6.0)
No. days <0.0C 22 (+8.3) Fog (at 09GMT) 0
Mean soil 30cm 6.0 (-0.1) Lysimeter:
PE -5.1 mm
Highest maximum 12.4C on 8th. Lowest minimum -1.5 on 31st. PWB 61.2 mm
Minimum relative humidity: 47% on 10th. PWS 61.4 mm
* Driest Dec since 1996 (43.5 mm) ranked 12th driest in records since 1928. PWD -0.2 mm
* Mean 5.0C and mean min coldest since 1996 (3.9C and 1.2C respectively). Most airfrosts 8
* since the 12 in 1996 but ground frosts 22 joint highest with 1989. Piche: 30.4 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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
16 precipitation within sight, 17 thunderstorm no precip., 22 snow in past hour, 42 fog thinner in past hour,
50 slight drizzle, 60 intermittent sl. rain, 61 continuous sl. rain, 63 cont. moderate rain, 80 sl. rain shower,
81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
'Recording Atmospheric Depositions on Grass' page.
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 2001
(.) Difference from 1991-2000 average. Total rainfall 866.0 mm
was 88% of average
Air temperatures Weather (No. days occurrence) Most in a day: 31.6 (Nov 28),
Mean maximum 13.0 (-0.3) Sleet/snow falling 18 (+5.2) and 26.5 mm (Feb 11)
Mean minimum 6.8 (-0.1) Snow lying (at 09GMT) 5 (+1.6)
Mean 9.9 (-0.2) Hail <5 mm 17 [- 4.7] No. of days with:
No. days <0.0C 28 (-8.2) Hail >=5 mm 4 [all hail] >=0.2 mm 206 (- 1)
Mean grass min 4.4 (-0.5) Thunder heard 8 (-0.3) >=1.0 mm 154 (- 4)
Lowest grass min-10.2 (- 1.9) Gales 10 >=5.0 mm 58 (-17)
No. days <0.0C 89 (+20.9) Fog (at 09GMT) 5 No. dry days 114 (+ 8)
Lysimeter:
PE 297.8 mm
Highest maximum 25.9 on Jul 28th. Lowest minimum -5.0 on Mar 4th. PWB 568.2 mm
Minimum relative humidity: 44% on Mar 10th. PWS 715.0 mm
* Driest year with 886.0 mm since 1996 (793.7 mm) and ranked 9th driest in records since 1929. PWD -146.8 mm
Coldest year and with most frosts since 1996. Piche: 430.3 ml
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Annual summaries for 2001 (No. days occurrence at 09 GMT).
Cloud cover Wind direction Wind speed Visibility Code Description
Cloud obscured 0 N 36 Calm 38 <100 m 0 Dense fog 0
8/8 cloud 120 NE 49 Force 1-3 255 100-190 m 1 Thick fog 0
6/8 to 7/8 143 E 24 Force 4-5 58 200-390 m 2 Fog 5
3/8 to 5/8 51 SE 17 Force 6-7 14 400-900 m 3 Mod. fog 2
1/8 to 2/8 42 S 65 Force 8-12 0 1.0-1.9 km 4 Very poor 16
Sky cloudless 9 SW 65 2.0-3.9 km 5 Poor 49
W 38 Check 365 4.0-9.0 km 6 Moderate 55
Check 365 NW 33 10 km 7 Good 238
Calm 38 or more
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)
Cod 0 1 2 3 4 5 6 7 8 9 Check
Jan 0 0 0 13 2 5 0 11 0 0 31
Feb 1 0 3 11 4 1 2 5 0 1 28
Mar 1 3 2 11 6 1 1 5 0 1 31
Apr 0 5 0 17 8 0 0 0 0 0 30
May 1 17 0 13 0 31
Jun 7 10 1 12 0 0 30
Jul 4 11 2 14 0 0 31
Aug 0 15 0 16 31
Sep 2 8 2 18 30
Oct 3 6 1 21 31
Nov 1 9 0 17 2 0 0 1 30
Dec 2 3 0 9 3 6 2 2 0 4 31
Yr 22 87 11 172 25 13 5 24 0 6 365
State of ground
Cod 0 1 2 3 4 5 6 7 8 9 Check
Jan 0 18 0 12 0 0 1 0 31
Feb 0 21 2 4 0 0 0 1 28
Mar 0 25 0 5 0 1 31
Apr 0 28 2 0 0 0 0 30
May 9 22 31
Jun 18 12 30
Jul 12 19 31
Aug 4 25 2 31
Sep 0 30 0 30
Oct 0 31 0 31
Nov 0 29 1 0 30
Dec 0 23 0 4 0 1 2 1 0 31
Yr 43 283 7 25 0 2 3 2 0 0 365
State of concrete
Cod 0 1 2 3 4 5 6 7 8 9 Check
Jan 5 4 12 2 0 4 4 0 31
Feb 9 1 9 6 1 0 1 1 28
Mar 13 1 11 5 0 0 1 31
Apr 13 2 10 5 0 0 30
May 23 1 3 4 31
Jun 23 4 3 0 30
Jul 21 3 1 6 31
Aug 14 4 8 5 31
Sep 14 4 8 4 30
Oct 7 5 15 4 31
Nov 5 7 11 7 30
Dec 9 2 13 2 1 1 1 2 31
Yr 156 38 104 50 2 5 7 3 0 0 365
These pages are designed and written by Donald Perkins © 1998 - 2001Page dated 1 January 2001: http://www.llansadwrn-wx.co.uk |