Llansadwrn (Anglesey) Weather
Daily Observations 2000
at 0900 GMT
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Llansadwrn (Anglesey) Weather |
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CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JANUARY 2000
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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 1 00 0 5 10 3.3 3.1 98 8.0 3.1 -0.8 2.1 3.5 5.0 5.4 5.8 6.8 1 2 5 0 0.2 000000 1023.1 0.0 0.0 1.1
02 8 SW 2 4 51 7.7 7.5 99 10.1 3.3 -0.1 5.8 5.5 5.2 5.3 5.9 6.9 1 3 3 0 7.3 0000G0 1023.1 3.6 0.0 1.0
03 6 S 2 6 10 5.5 4.3 92 7.7 5.0 1.8 4.8 5.7 6.4 6.0 6.2 6.8 1 2 1 0 3.0 000000 1014.6 3.2 0.0 0.8
04 7 S 6 7 02 6.8 4.3 84 8.7 4.0 0.2 5.5 5.5 5.8 6.0 6.4 7.0 1 2 3 0 3.9 s00t00 1005.5 1.9 0.0 1.6
05 8 S 7 5 60 8.4 6.7 89 10.7 2.6 0.2 5.7 5.0 5.7 5.2 6.1 7.2 1 3 3 0 2.0 0000G0 1003.4 1.2 0.0 2.2
06 7 W 2 6 25 7.5 5.3 86 9.3 7.5 5.6 6.4 6.5 6.5 6.4 6.5 7.0 1 1 3 0 0.4 000000 1004.2 0.9 0.0 1.5
07 8 SW 6 6 02 9.0 4.7 75 9.4 3.5 -0.5 6.5 6.4 6.0 6.2 6.5 7.2 1 0 0 0 8.5 0040G0 1009.5 4.4 0.0 1.5
08 2 SW 3 7 05 5.0 1.5 78 7.3 4.6 1.7 3.3 4.3 5.5 6.2 6.6 7.3 1 1 4 0 0.0 000000 1010.7 0.0 0.0 1.0
09 1 NW 1 6 05 1.8 1.0 94 7.6 1.6 -2.2 1.4 2.5 4.0 5.2 6.4 7.2 1 0 7 0 0.0 000000 1023.9 0.0 0.0 0.7
10 7 S 5 7 03 6.6 4.5 87 9.0 1.8 -1.9 4.0 3.8 4.0 4.7 5.8 7.3 1 1 4 0 25.8 000000 1027.6 16.4 0.0 0.5
11 8 SW 5 4 63 9.0 9.0 100 9.2 6.5 5.5 7.8 7.2 6.5 6.1 6.2 7.2 2 3 3 0 40.6 0000G0 1025.7 20.7 0.0 0.3
12 8 00 0 4 63 6.0 5.8 98 6.4 5.9 5.5 7.0 7.3 7.1 6.9 6.6 7.0 2 3 3 0 28.5 s00000 1017.8 15.5 0.0 0.0
13 6 N 1 7 01 1.4 0.9 96 6.0 0.7 -1.7 2.5 3.9 5.2 5.9 6.5 7.2 1 2 5 0 3.3 004000 1016.6 1.6 0.0 0.6
14 6 NE 3 7 05 3.6 1.3 85 5.2 1.4 -0.2 3.3 3.8 4.5 5.3 6.2 7.2 1 0 3 0 0.0 000000 1028.7 0.0 0.0 1.3
15 6 NE 2 7 01 3.0 0.9 86 6.1 2.5 0.8 2.7 3.3 4.0 5.0 5.9 7.0 1 0 0 0 0.0 000000 1038.7 0.0 0.0 0.5
16 8 N 1 7 02 3.5 1.4 86 6.5 0.1 -3.0 3.1 3.3 3.9 4.5 5.5 6.7 1 0 4 0 0.5 000000 1042.6 2.6 0.0 0.4
17 7 NW 1 7 01 6.3 5.6 95 7.6 3.5 1.7 5.0 5.0 5.0 5.0 5.5 6.8 1 2 3 0 0.3 000000 1042.6 0.8 0.0 0.1
18 8 00 0 4 51 6.5 6.5 100 7.0 5.2 2.0 5.7 5.7 5.6 5.6 5.9 6.8 1 3 3 0 0.4 000000 1039.4 0.5 0.0 0.1
19 8 N 1 7 02 4.9 4.2 95 6.9 4.7 4.2 5.3 5.7 5.9 5.9 6.5 6.8 1 2 3 0 tr 000000 1039.4 0.0 0.0 0.4
20 8 W 1 5 50 3.7 1.9 88 6.0 3.7 3.3 4.7 5.0 5.6 6.0 6.5 6.9 1 0 3 0 0.9 000000 1035.9 0.6 0.0 0.3
21 8 N 1 7 50 4.7 4.5 98 6.0 2.7 -0.3 4.1 4.5 5.2 5.7 6.4 7.0 1 3 3 0 2.1 000000 1036.3 2.3 0.0 0.4
22 7 N 3 5 18 6.0 3.9 86 7.3 4.0 0.7 4.5 5.0 5.2 5.5 6.3 7.0 1 2 3 0 1.3 004000 1024.2 0.3 0.0 0.9
23 3 NE 2 7 01 3.0 1.2 88 6.0 2.1 -1.0 2.1 3.2 4.2 5.0 6.2 7.0 1 0 4 0 0.6 000000 1028.3 0.4 0.0 0.7
24 7 N 1 7 02 3.6 2.9 95 6.0 1.1 0.6 3.5 4.0 4.3 4.8 5.6 7.0 1 2 3 0 tr 000000 1025.7 0.0 0.0 0.2
25 5 00 0 7 04 2.6 2.3 98 8.7 0.5 -2.4 2.0 3.0 4.0 4.5 5.5 6.9 1 1 5 0 0.0 000000 1029.4 0.0 0.0 0.5
26 7 SW 1 6 05 3.7 1.9 88 5.8 1.5 -2.0 3.2 3.6 4.0 4.4 5.4 6.7 1 0 4 0 0.0 000000 1030.9 0.0 0.0 0.3
27 5 SW 1 7 04 3.0 2.0 93 7.3 1.3 -2.0 2.2 3.0 3.8 4.2 5.3 6.5 1 1 4 0 1.0 000000 1029.4 0.6 0.0 1.1
28 8 SW 6 5 63 5.7 4.5 92 9.6 3.0 0.8 4.8 4.8 5.2 4.8 5.4 6.5 1 3 3 0 8.6 0000G0 1011.1 4.2 0.0 0.6
29 7 W 6 5 01 9.6 7.3 85 10.1 5.5 4.8 7.2 7.0 6.4 5.9 5.7 6.5 1 2 3 0 4.2 000000 993.8 4.7 0.0 0.7
30 8 SW 5 5 02 9.0 8.8 99 10.1 7.1 5.0 7.5 7.0 6.5 6.3 6.3 6.7 1 2 3 0 0.8 000000 1009.1 1.3 0.0 1.0
31 8 S 2 5 10 9.1 8.9 99 9.5 8.5 8.1 8.0 7.8 7.2 6.9 6.6 6.8 1 2 3 0 1.0 000000 1015.8 2.0 0.0 1.2
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Mean
6 5.5 4.1 91 7.8 3.5 1.1 4.6 4.9 5.3 5.5 6.1 6.9 1022.8
Total 145.2 89.7 0.0 23.5
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(.) Difference from 1990-99 average used by the Climatological Observers Link. Rainfall was 140% of average
Air temperatures Weather (No. days occurrence) and 152% of 1961-90 ave.
Mean maximum 7.8 ( 0.0) Sleet/snow falling 2 ( 0.0) Most in a day: 40.6 mm on 11th
Mean minimum 3.5 (+0.8) Snow lying (at 09GMT) 0 (-0.5) No. of days with:
Mean 5.7 (+0.4) Hail <5 mm 3 [-0.3] >=0.2 mm 23 (+ 4.0)
No. days <0.0C 0 (-5.9) Hail >=5 mm 0 [all hail] >=1.0 mm 15 (- 0.4)
Mean grass min 1.1 (-0.8) Thunder heard 1 (+0.5) >=5.0 mm 6 (- 1.0)
Lowest grass min -3.0 (+3.3) Gales 5 Lysimeter:
No. days <0.0C 13 (-0.8) Fog (at 09GMT) 0 PE -8.5 mm
PWB 153.7 mm
Highest maximum 10.7C on 5th. Lowest minimum 0.1 on 16th. PWS 153.9 mm
Minimum relative humidity: 74% on 5,25th. PWD -0.2 mm
* 40.6 mm rainfall on 11th largest fall since 40.7 mm on 10 January 1984. Piche: 23.5 ml
Next largest fall was 44.2 mm on 8 December 1983.
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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,
18 squalls, rain shower, 50 slight drizzle, continuous sl. drizzle, 60 intermittent sl. rain, 63 cont. moderate 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: 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 at 09GMT.
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CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR FEBRUARY 2000
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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 6 5 63 8.3 7.5 94 9.2 8.3 7.6 7.5 7.5 7.3 7.3 7.0 7.1 1 3 3 0 9.5 000t00 1008.7 7.0 0.0 0.1
02 1 W 1 6 01 3.7 3.5 98 9.4 2.2 -1.2 3.0 4.2 5.1 6.7 7.0 7.1 1 2 5 0 0.0 000000 1020.1 0.0 0.0 0.7
03 6 SW 1 7 05 6.0 4.9 92 9.3 3.7 0.3 5.0 5.2 5.9 6.2 6.8 7.2 1 1 1 0 12.6 000000 1030.5 13.5 0.0 0.3
04 8 S 6 4 42 9.1 9.1 100 9.5 5.9 4.5 8.1 7.7 7.2 6.9 6.9 7.2 1 3 3 0 0.4 000000 1026.5 0.4 0.0 0.6
05 7 SW 5 5 03 8.0 6.3 89 9.4 8.0 7.3 7.5 7.7 7.7 7.5 7.2 7.4 1 1 3 0 3.4 000000 1022.7 1.8 0.0 0.8
06 8 S 4 5 60 9.0 8.6 97 10.0 7.7 6.8 8.0 7.9 7.9 7.7 7.4 7.5 1 2 3 0 6.7 000000 1011.9 2.3 0.0 1.3
07 8 S 7 4 63 6.1 5.0 92 10.5 4.7 2.2 5.6 6.0 6.5 7.3 7.5 7.6 2 3 3 0 4.1 000000 1002.2 5.5 0.0 1.8
08 8 SW 5 5 80 9.4 8.8 96 9.7 6.1 5.5 7.5 7.0 7.0 7.2 7.4 7.6 1 3 3 0 0.3 s04000 994.2 0.3 0.0 1.5
09 7 W 4 6 05 6.5 3.7 82 9.6 3.5 1.0 4.4 4.7 5.7 6.7 7.2 7.8 1 0 0 0 14.7 0000G0 1018.9 4.0 0.0 2.0
10 7 NW 4 7 05 4.2 1.1 80 7.7 4.2 2.9 5.7 6.5 6.8 6.9 7.1 7.7 1 2 3 0 0.0 0000G0 1006.3 0.0 0.0 1.3
11 6 SW 3 7 05 6.1 4.7 91 9.6 3.0 -1.0 4.2 4.5 5.3 6.0 7.0 7.5 1 0 4 0 14.7 0000G0 1023.1 2.8 0.0 1.5
12 6 W 3 7 05 3.3 1.2 86 6.6 3.0 0.5 4.5 5.5 6.5 6.6 7.0 7.6 1 2 4 0 3.0 s040G0 1011.5 1.6 0.0 0.8
13 1 00 0 6 10 1.2 0.7 96 9.1 0.6 -2.2 2.5 3.8 5.5 6.2 6.8 7.6 1 2 5 0 2.4 000000 1017.4 2.0 0.0 1.2
14 8 S 5 7 60 7.1 5.8 91 12.8 1.2 -2.5 4.5 4.3 4.7 5.4 6.8 7.6 1 3 3 0 5.2 000000 1011.5 4.4 0.0 0.6
15 8 SW 3 7 05 5.0 3.1 87 6.9 2.7 -0.5 4.0 4.5 5.3 5.9 6.5 7.5 1 2 4 0 7.3 000000 1014.2 4.1 0.0 0.8
16 7 W 4 7 02 2.2 -0.6 82 5.5 0.8 -1.9 1.3 2.5 4.0 5.2 6.4 7.4 1 0 5 0 0.0 000000 1002.2 0.0 0.0 0.9
17 3 NW 1 7 05 2.0 1.2 94 8.8 0.4 -3.4 1.4 2.6 4.0 5.0 6.0 7.4 1 0 7 0 7.1 000000 1010.3 6.7 0.0 0.9
18 8 W 3 5 02 6.1 5.0 92 8.5 0.9 -1.7 5.4 5.4 5.5 5.8 6.3 7.2 1 2 3 0 1.7 000000 1000.9 1.0 0.0 0.5
19 3 N 3 6 02 4.0 2.5 90 7.4 3.6 1.9 4.0 5.0 5.5 5.8 6.2 7.2 1 2 3 0 0.0 000000 1015.8 0.0 0.5 0.8
20 5 SW 2 7 04 2.7 -1.5 74 8.4 -0.4 -4.6 1.5 2.5 4.3 5.2 6.3 7.2 3 0 7 0 4.2 000000 1028.0 3.5 8.0 2.0
21 1 NW 1 7 05 2.7 2.2 96 10.2 1.6 -1.5 3.0 4.0 5.2 5.4 6.2 7.0 1 2 5 0 0.0 000000 1025.7 0.0 0.0 1.1
22 7 SE 1 7 04 4.3 -1.5 66 8.4 0.5 -3.5 3.0 3.6 4.7 5.3 6.2 6.9 1 0 4 0 tr 000000 1020.8 0.0 0.0 1.6
23 8 S 4 5 60 8.4 6.9 90 10.0 4.3 3.7 6.7 6.3 6.0 6.2 6.2 6.9 1 1 3 0 2.9 000000 1017.4 2.2 0.0 0.5
24 7 W 4 6 01 5.1 2.1 81 7.6 3.5 0.0 4.5 5.1 6.0 6.4 6.5 7.0 1 2 3 0 2.5 004000 1020.1 1.4 0.0 0.9
25 1 SW 2 6 05 3.8 2.6 92 9.5 0.5 -3.9 2.1 3.0 4.8 5.8 6.5 7.1 1 4 5 0 1.1 000000 1026.1 0.8 0.0 1.3
26 2 SW 2 7 01 5.2 2.5 83 9.8 3.8 1.0 4.3 4.8 5.5 5.8 6.5 7.2 1 2 3 0 5.4 0000G0 1026.5 6.1 0.0 1.8
27 8 SW 8 4 63 9.5 8.5 93 9.7 5.2 3.7 8.2 7.8 7.0 6.8 6.6 7.0 2 3 3 0 25.4 0000G0 1006.3 11.3 0.0 0.7
28 6 W 4 7 01 5.2 2.2 81 7.8 4.1 1.8 5.0 5.5 6.3 6.8 7.0 7.2 1 1 4 0 7.0 004000 1003.4 6.5 0.0 1.5
29 7 NW 1 5 01 6.6 6.4 98 8.0 4.8 3.0 6.2 6.2 6.2 6.6 7.0 7.4 1 2 3 0 1.8 000000 993.8 2.0 0.0 0.3
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Mean
6 5.5 3.9 89 8.9 3.4 0.9 4.8 5.2 5.8 6.3 6.7 7.3 1014.4
Total 143.4 91.2 8.5 30.1
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(.) Difference from 1990-99 average used by the Climatological Observers Link. Rainfall was 156% of average
Air temperatures Weather (No. days occurrence) and 212% of 1961-90 ave.
Mean maximum 8.9 (+0.6) Sleet/snow falling 2 (-1.3) Most in a day: 25.4 on 27th.
Mean minimum 3.4 (+0.5) Snow lying (at 09GMT) 0 (-1.1) No. of days with:
Mean 6.2 (+0.6) Hail <5 mm 4 [+0.5] >=0.2 mm 23 (+ 4.4)
No. days <0.0C 1 (-3.9) Hail >=5 mm 0 [all hail] >=1.0 mm 21 (+ 7.3)
Mean grass min 0.9 (-0.2) Thunder heard 1 (+0.5) >=5.0 mm 11 (+ 4.2)
Lowest grass min -4.6 (-0.3) Gales 6 Lysimeter:
No. days <0.0C 12 (+0.8) Fog (at 09GMT) 0 PE -4.5 mm
PWB 147.9 mm
Highest maximum 12.8C on 14th. Lowest minimum -0.4 on 20th. PWS 147.9 mm
Minimum relative humidity: 59% on 10th and 21st. PWD 0.0 mm
* Piche: 30.1 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,
10 mist, 42 fog thinner, 60 intermittent slight rain, 63 continuous moderate rain, 80 sl. rain shower.
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: 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 at 09GMT.
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CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR MARCH 2000
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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 N 2 7 05 4.1 2.4 88 8.2 2.5 -0.1 3.7 4.5 5.7 6.4 6.9 7.4 1 1 4 0 7.4 s04000 1009.9 6.5 0.0 1.0
02 8 SW 5 5 63 6.5 6.1 97 9.2 1.8 -1.7 5.5 5.5 5.8 6.3 6.8 7.3 2 3 3 0 15.8 000000 1012.3 9.3 0.0 0.5
03 1 NW 3 6 10 5.0 3.1 87 8.2 2.5 -1.0 4.2 5.0 6.1 6.5 6.8 7.3 1 2 4 0 0.6 004000 1000.1 0.4 0.0 0.8
04 5 00 0 7 04 0.4 -2.0 84 9.5 -1.6 -5.8 1.6 3.0 4.7 5.4 6.8 7.3 3 5 7 0 0.0 003000 1027.2 0.0 5.4 1.2
05 6 SW 2 7 05 4.6 3.4 92 9.1 0.3 -3.5 3.0 3.5 4.9 5.8 6.8 7.2 1 0 4 0 0.4 000000 1030.5 0.0 0.0 1.5
06 8 SW 4 4 10 8.5 8.1 97 11.7 4.6 3.9 7.5 7.0 6.5 6.4 6.6 7.3 1 2 3 0 5.7 000000 1023.1 2.0 0.0 0.5
07 8 S 4 2 46 8.6 8.6 100 10.3 8.0 7.7 8.2 8.0 7.6 7.3 6.9 7.3 1 2 2 0 0.4 00000F 1019.7 0.2 0.0 0.1
08 8 SW 4 3 42 9.7 9.5 99 11.6 8.5 8.3 9.0 8.6 8.2 7.8 7.5 7.5 1 2 2 0 0.4 000000 1019.3 1.2 0.0 0.7
09 7 W 2 7 05 9.9 8.0 88 12.9 8.8 6.4 8.7 8.7 8.7 8.4 7.8 7.5 1 2 3 0 4.0 000000 1025.0 4.2 0.0 0.6
10 8 SW 2 5 05 8.6 7.5 93 9.6 7.8 7.3 8.6 8.8 9.0 8.8 8.2 7.8 1 2 3 0 tr 000000 1028.3 0.0 0.0 0.8
11 7 NW 1 7 05 7.8 4.9 82 11.5 7.0 6.1 8.1 8.3 8.5 8.6 8.4 8.0 1 0 1 0 0.0 000000 1024.6 0.0 0.0 1.0
12 7 SW 1 6 05 6.8 6.1 96 9.8 3.8 -0.9 7.0 7.0 7.6 8.3 8.5 8.2 1 0 4 0 tr 000000 1027.6 0.0 0.0 0.6
13 7 SW 1 5 05 9.4 8.6 95 13.6 6.7 5.8 8.8 8.5 8.4 8.6 8.4 8.2 1 0 1 0 0.5 000000 1028.0 0.5 0.0 1.3
14 7 NW 1 7 01 7.2 4.9 85 10.2 6.7 6.0 8.8 8.8 9.0 9.0 8.8 8.2 1 2 3 0 tr 000000 1026.8 0.0 0.0 1.3
15 7 NW 1 7 03 6.7 5.6 93 8.9 2.6 -0.3 6.5 6.5 8.0 8.5 8.8 8.3 1 0 4 0 0.0 000000 1035.9 0.0 0.0 0.6
16 8 00 0 7 04 8.1 7.0 93 10.6 6.5 6.3 8.2 8.0 8.2 8.6 8.6 8.6 1 0 1 0 tr 000000 1037.0 0.0 0.0 0.6
17 8 00 0 5 02 8.2 7.1 93 10.2 7.1 6.5 8.5 8.4 8.5 8.8 8.6 8.6 1 0 1 0 3.3 000000 1037.0 3.9 0.0 0.5
18 7 E 1 5 01 8.4 8.0 97 13.1 7.4 6.4 9.5 9.0 9.0 9.0 8.8 8.5 1 2 3 0 0.0 000000 1038.7 0.0 0.0 0.9
19 7 SW 1 7 05 7.6 5.6 87 10.8 3.5 -1.0 8.0 8.0 8.5 9.0 9.0 8.8 1 0 4 0 0.0 000000 1039.8 0.0 0.0 0.4
20 8 NW 1 7 04 7.5 7.3 99 9.6 3.6 0.2 8.0 7.8 8.1 8.6 9.0 8.8 1 0 2 0 0.0 000000 1033.8 0.0 0.0 0.5
21 7 SW 1 7 05 7.7 4.8 82 10.5 4.7 1.6 7.6 7.6 8.1 8.7 9.0 8.9 1 0 1 0 0.0 000000 1023.9 0.0 0.0 0.9
22 3 NE 1 5 05 7.1 5.5 90 10.1 2.6 0.1 6.5 6.8 8.0 8.6 9.0 8.9 1 0 1 0 0.1 000000 1017.8 0.5 0.0 0.8
23 8 SE 1 6 02 9.1 6.1 81 11.2 4.4 2.0 7.5 7.5 8.1 8.8 9.0 8.8 1 1 3 0 4.1 000000 1009.5 5.2 0.0 1.6
24 7 S 2 7 60 7.3 4.8 84 11.1 6.6 3.4 7.5 7.4 7.9 8.4 8.8 9.1 1 2 3 0 2.9 000000 1001.4 1.9 0.0 2.1
25 3 SW 4 7 01 6.7 2.1 72 10.5 3.3 1.7 6.0 6.1 7.2 8.3 8.6 8.8 1 2 3 0 1.4 000000 1006.3 1.3 0.0 1.9
26 8 W 1 6 02 6.6 5.7 94 9.6 3.3 -0.3 7.3 7.0 7.6 8.3 8.8 8.8 1 2 3 0 2.5 000000 1005.5 1.8 0.0 0.8
27 1 NE 4 7 05 6.5 2.9 78 9.3 4.3 2.0 6.1 6.1 7.3 8.3 8.8 8.9 1 0 1 0 0.0 000000 1020.4 0.0 0.0 1.8
28 5 NE 3 7 05 5.3 0.4 70 8.4 3.4 1.1 5.2 6.0 7.2 8.2 8.8 8.9 1 0 1 0 0.0 000000 1025.7 0.0 0.0 1.8
29 6 NE 3 7 05 4.8 0.1 71 10.1 2.0 -0.6 5.2 5.1 6.5 7.8 8.7 8.8 1 0 1 0 0.0 000000 1023.9 0.0 0.0 1.8
30 1 E 2 7 05 5.2 2.2 81 8.9 0.5 -2.7 4.8 5.0 6.7 8.0 8.5 8.8 1 0 7 0 0.0 000000 1019.7 0.0 0.0 2.1
31 5 SW 1 6 05 5.1 2.4 83 10.0 0.0 -3.7 5.1 5.1 6.8 7.8 8.5 8.8 0 0 7 0 4.8 000000 1007.9 9.0 0.0 1.2
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Mean
6 6.9 5.1 88 10.3 4.3 2.0 6.8 6.9 7.5 8.0 8.2 8.2 1022.1
Total 54.3 47.9 5.4 32.2
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(.) Difference from 1990-99 average used by the Climatological Observers Link. Rainfall was 66% of average
Air temperatures Weather (No. days occurrence) and 70% of 1961-90 ave.
Mean maximum 10.3 (+0.1) Sleet/snow falling 1 (-1.3) Most in a day: 15.8 mm on 2nd.
Mean minimum 4.3 ( 0.0) Snow lying (at 09GMT) 0 (-0.3) No. of days with:
Mean 7.3 ( 0.0) Hail <5 mm 3 [+0.4] >=0.2 mm 15 (- 2.5)
No. days <0.0C 1 (-0.6) Hail >=5 mm 0 [all hail] >=1.0 mm 10 (- 2.1)
Mean grass min 2.0 (-0.4) Thunder heard 0 (-0.5) >=5.0 mm 3 (- 2.0)
Lowest grass min -5.8 (-1.6) Gales 0 Lysimeter:
No. days <0.0C 12 (+3.4) Fog (at 09GMT) 1 PE 18.8 mm
PWB 35.5 mm
Highest maximum 13.6C on 13th. Lowest minimum -1.6 on 4th. PWS 44.7 mm
Minimum relative humidity: 57% on 4th. PWD -9.2 mm
* Deposition of dust on 3, 10, 13, 17 and 23rd of probable Saharan origin. Piche: 32.2 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,
10 mist, 42 fog thinning, 46 fog thicker, 60 intermittent slight rain, 63 continuous moderate 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: 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 at 09GMT.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR APRIL 2000
---------------------------------------------------------------------------------------------------------------------------
-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 00 0 5 61 5.4 4.7 95 9.1 4.6 3.7 7.0 7.5 8.0 8.4 8.7 8.8 1 2 3 0 2.7 004000 998.0 4.2 0.0 0.4
02 8 NE 1 7 42 7.3 7.2 99 9.2 4.6 0.5 8.0 7.8 8.2 8.8 8.8 8.9 1 2 2 0 13.1 00000F 998.0 15.8 0.0 0.3
03 8 NE 5 5 71 1.8 1.3 96 3.5 1.8 1.3 4.9 6.0 7.5 8.6 8.8 8.8 2 3 4 0 0.9 s04000 998.9 1.8 0.0 1.7
04 2 NE 6 7 01 3.5 -2.2 66 7.3 1.5 -0.4 3.4 3.8 5.7 7.2 8.3 9.0 1 0 4 0 tr s00000 1004.2 0.0 0.0 3.2
05 2 NE 2 8 02 5.8 0.7 70 9.0 1.0 -2.6 4.3 4.1 5.8 7.2 8.0 8.8 1 0 4 0 0.0 000000 1018.9 0.0 0.0 1.9
06 1 NE 1 8 02 8.1 2.4 67 13.5 1.1 -3.7 5.8 5.0 6.4 7.8 8.2 8.8 1 0 4 0 0.0 s00000 1030.2 0.0 0.0 2.1
07 5 SW 2 7 05 7.6 2.3 69 12.1 2.2 -1.6 6.8 6.0 7.3 8.2 8.6 8.8 0 0 4 0 0.0 000000 1033.4 0.0 0.0 2.1
08 6 SW 2 5 05 7.3 4.6 83 10.1 4.4 2.0 7.2 7.2 8.0 8.7 8.8 8.8 0 0 1 0 tr 000000 1026.5 0.0 0.0 1.0
09 5 NE 5 7 05 7.2 3.7 78 8.9 4.5 2.2 7.5 7.4 8.0 8.8 8.8 8.8 0 0 3 0 0.0 000000 1020.1 0.0 0.0 1.1
10 0 NE 1 7 04 7.6 3.1 73 11.1 2.8 -0.1 7.3 6.0 7.2 8.4 8.7 8.9 0 0 1 0 6.8 000000 1020.1 6.0 0.0 1.2
11 7 NE 1 7 02 6.0 4.9 92 6.6 3.9 3.7 9.0 8.5 9.0 9.3 9.2 8.8 1 2 3 0 4.0 s04000 992.5 8.0 0.0 0.5
12 8 NE 3 5 61 5.3 4.6 95 8.5 3.0 1.7 7.0 7.2 8.0 8.9 9.0 8.9 1 3 3 0 1.1 004000 985.2 3.2 0.0 1.4
13 8 N 4 5 61 4.7 3.7 93 5.8 4.5 3.3 6.0 6.2 7.5 8.4 8.8 8.9 1 3 3 0 0.9 000000 993.8 2.4 0.0 1.0
14 7 NE 3 8 01 5.0 1.5 78 8.5 3.7 2.2 5.8 6.0 7.0 7.9 8.7 8.9 1 0 3 0 0.0 000000 1003.0 0.0 0.0 1.6
15 7 N 1 8 02 6.4 1.4 70 10.3 0.6 -3.3 7.0 6.0 7.0 8.1 8.7 8.9 1 0 4 0 0.3 s03000 996.8 0.6 0.0 1.2
16 3 S 2 8 02 8.8 1.2 59 11.1 0.5 -2.6 7.1 6.3 7.0 8.2 8.7 8.8 1 0 4 0 8.0 000000 993.8 6.5 0.0 1.9
17 8 NE 2 5 63 4.2 3.7 97 6.3 3.2 2.8 6.0 6.7 7.8 8.4 8.7 8.8 1 3 3 0 5.8 000000 984.3 8.2 0.0 0.2
18 3 SW 1 8 01 6.3 4.7 90 11.4 3.8 1.4 6.0 6.3 7.2 7.9 8.6 8.9 1 2 3 0 tr 000000 995.9 0.0 0.0 1.2
19 3 S 2 7 05 9.6 4.2 69 14.0 3.1 -0.7 7.8 6.8 7.8 8.7 8.8 8.8 1 0 4 0 0.7 000000 1004.2 1.1 0.0 3.2
20 6 S 5 5 80 12.0 6.8 70 13.9 9.4 7.8 10.5 9.5 9.5 9.6 9.0 8.8 1 1 3 0 2.5 004000 997.2 3.2 0.0 3.4
21 7 SW 4 6 80 10.7 7.8 82 13.2 8.2 6.7 10.1 9.8 9.8 9.8 9.4 8.9 1 3 3 0 4.4 000000 1001.8 3.0 0.0 2.2
22 7 SW 1 7 01 10.5 6.7 77 14.5 7.1 4.7 9.3 9.0 9.4 10.0 9.6 9.1 1 2 3 0 0.1 004000 1005.1 0.2 0.0 1.7
23 7 S 1 7 03 10.3 6.9 80 13.3 7.5 3.8 9.5 9.2 9.6 10.2 10.0 9.3 1 0 1 0 2.4 000000 1008.3 3.5 0.0 1.7
24 8 S 1 7 21 8.8 8.2 96 15.1 6.6 3.0 10.0 9.8 10.0 10.0 10.0 9.5 1 2 3 0 11.4 000000 1008.7 7.3 0.0 1.1
25 8 00 0 7 10 9.5 9.1 97 13.7 7.6 6.6 10.0 10.0 10.1 10.6 10.1 9.6 2 3 3 0 1.3 000000 1000.5 2.0 0.0 0.9
26 8 NE 1 6 25 9.7 8.3 91 13.0 8.2 7.3 11.1 10.8 11.0 11.0 10.7 9.9 1 2 3 0 5.3 000000 1003.4 2.2 0.0 0.6
27 7 S 3 7 01 8.2 6.9 92 12.3 5.8 2.6 10.0 10.0 10.5 11.0 10.8 9.9 1 2 3 0 tr 000000 1007.9 0.0 0.0 1.7
28 2 N 1 8 03 11.8 7.9 77 13.2 5.0 1.3 9.8 9.2 10.1 11.0 10.9 10.0 1 0 1 0 7.1 000000 1009.5 10.5 0.0 0.9
29 8 00 0 4 60 9.4 9.0 97 13.7 8.0 7.5 10.9 10.7 11.0 11.3 11.0 10.1 1 3 3 0 tr 000000 1012.7 0.0 0.0 1.0
30 0 NE 1 7 05 13.2 9.5 78 16.5 6.1 1.6 10.6 9.3 10.0 11.0 11.0 10.1 1 0 1 0 0.0 000000 1023.5 0.0 0.0 1.6
---------------------------------------------------------------------------------------------------------------------------
Mean
6 7.7 4.8 83 11.0 4.5 2.1 7.9 7.6 8.4 9.1 9.2 9.1 1005.9
Total 78.8 89.7 0.0 44.0
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1990-99 average used by the Climatological Observers Link. Rainfall was 112% of average
Air temperatures Weather (No. days occurrence) and 131% of 1961-90 ave.
Mean maximum 11.0 (-1.6) Sleet/snow falling 4 (+2.3) Most in a day: 13.1mm on 2nd.
Mean minimum 4.5 (-0.6) Snow lying (at 09GMT) 0 (-0.3) No. of days with:
Mean 7.8 (-1.1) Hail <5 mm 7 [+4.7] >=0.2 mm 18 (+ 1.1)
No. days <0.0C 0 (-0.9) Hail >=5 mm 0 [all hail] >=1.0 mm 14 (+ 1.1)
Mean grass min 2.1 (-1.2) Thunder heard 0 (-0.3) >=5.0 mm 7 (+ 2.5)
Lowest grass min -3.7 (-0.7) Gales 0 Lysimeter:
No. days <0.0C 8 (+2.5) Fog (at 09GMT) 0 PE 16.8 mm
PWB 62.0 mm
Highest maximum 16.5C on 30th. Lowest minimum 0.5C on 16th. PWS 71.4 mm
Minimum relative humidity: 43% on 6th. PWD -9.4 mm
* Mean max 11.0C 2nd coldest April on record. Max of 3.5C on 3rd coldest on record. Piche: 44.0 ml
Mean min coldest since 1994. Mean 7.8C lowest since 1994.
---------------------------------------------------------------------------------------------------------------------------
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,
21 rain in past hour; 25 shower of rain in past hour; 42 fog has become thinner; 60 intermittent slight rain;
61 continuous slight rain; 63 cont. moderate rain; 71 cont. fall of snowflakes; 80 slight rain shower.
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: 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 at 09GMT.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR MAY 2000
---------------------------------------------------------------------------------------------------------------------------
-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 2 00 0 7 05 15.0 7.8 62 17.0 7.8 3.3 11.5 10.6 11.4 11.9 11.4 10.3 1 0 1 0 0.0 000000 1026.5 0.0 0.0 2.3
02 0 NE 2 6 05 14.0 9.1 72 16.7 8.1 3.9 12.5 11.5 12.1 12.7 12.0 10.5 0 0 1 0 0.0 000000 1029.4 0.0 0.0 2.2
03 0 NE 3 7 05 10.7 7.4 80 13.3 7.4 5.8 11.6 11.3 12.4 13.0 12.5 10.9 0 0 1 0 0.0 000000 1029.4 0.0 0.0 1.9
04 6 NE 3 7 02 8.3 4.4 77 12.3 7.5 5.6 11.0 11.7 12.7 13.2 12.4 11.0 0 0 1 0 0.0 000000 1027.6 0.0 0.0 1.9
05 1 NE 2 7 04 10.4 6.1 75 15.5 5.3 3.6 11.6 10.8 12.1 13.2 12.8 11.3 0 0 1 0 0.0 000000 1020.8 0.0 0.0 2.3
06 6 NE 3 5 04 13.7 9.4 75 19.5 9.5 7.4 14.4 13.0 13.2 13.8 13.0 11.5 0 0 1 0 0.0 000000 1016.2 0.0 0.0 2.3
07 3 NE 2 5 04 16.5 12.6 77 19.8 11.2 8.7 16.0 14.5 14.5 14.5 13.5 11.8 0 0 1 0 tr 000000 1017.4 0.0 0.0 3.4
08 2 NE 2 7 05 16.7 8.6 59 18.6 10.5 8.8 16.0 14.3 14.5 15.0 13.8 12.0 0 0 0 0 0.0 000000 1019.7 0.0 0.0 3.6
09 0 N 1 5 05 16.6 13.2 81 19.5 10.5 8.2 16.4 15.0 15.0 15.1 14.0 12.5 0 0 1 0 0.0 000000 1020.1 0.0 0.0 1.7
10 0 N 2 6 05 14.5 12.8 81 17.3 9.7 8.1 16.5 15.0 15.2 15.4 14.5 12.5 0 0 1 0 0.0 000000 1022.0 0.0 0.0 2.0
11 6 E 4 7 05 12.7 8.3 74 16.2 9.5 8.4 15.2 14.3 15.0 15.2 14.8 12.7 0 0 0 0 0.0 000000 1023.5 0.0 0.0 3.9
12 6 NE 3 7 02 13.7 9.2 74 19.5 8.9 7.4 15.0 13.4 13.9 14.5 14.5 12.9 0 0 0 0 0.2 000000 1022.0 0.3 0.0 1.6
13 6 S 1 5 05 17.7 13.6 77 19.5 12.5 11.3 17.8 16.0 15.3 15.3 14.7 13.0 0 0 3 0 0.0 000000 1023.1 0.0 0.0 1.4
14 1 SE 1 7 01 19.5 12.0 62 24.1 11.6 8.5 17.2 14.8 14.8 15.2 14.7 13.1 0 0 1 0 0.0 000000 1023.5 0.0 0.0 2.7
15 7 S 1 5 05 14.6 13.0 90 18.1 11.8 8.8 17.0 16.4 16.1 16.0 15.0 13.2 0 0 1 0 tr 000000 1018.9 0.0 0.0 2.2
16 8 S 5 5 05 13.0 9.1 77 13.2 10.4 9.4 15.0 14.6 14.9 15.2 14.9 13.2 0 0 0 0 5.9 000000 1009.1 9.6 0.0 1.3
17 7 SW 5 7 10 9.9 7.2 83 11.7 6.2 5.8 12.6 12.6 13.3 14.3 14.5 13.4 1 0 3 0 8.3 004000 1007.5 9.1 0.0 1.1
18 7 NW 2 7 10 8.7 8.1 96 14.7 7.2 6.0 11.1 11.5 12.5 13.6 14.0 13.2 1 2 3 0 0.4 000000 1006.3 1.8 0.0 1.5
19 7 NW 3 7 01 9.8 6.4 79 14.1 7.3 6.5 12.4 12.2 12.9 13.8 13.8 13.2 1 0 3 0 0.1 000000 1008.3 0.0 0.0 1.4
20 8 S 2 6 60 11.0 8.6 85 11.5 6.9 3.5 12.9 12.5 13.0 13.8 13.8 13.2 1 1 3 0 3.8 000000 1011.5 4.9 0.0 0.7
21 7 N 1 7 20 10.7 9.9 95 15.4 6.6 3.8 13.0 13.3 13.5 13.6 13.8 13.0 1 2 3 0 0.4 000000 1008.3 1.5 0.0 0.9
22 7 NE 1 7 01 11.7 7.1 74 15.0 8.0 5.7 14.5 13.2 13.0 13.8 13.7 13.0 1 0 3 0 7.3 000000 1015.4 7.9 0.0 2.5
23 8 S 5 5 63 11.8 12.2 96 12.2 8.0 7.0 12.5 12.7 13.5 14.0 13.8 13.0 1 3 3 0 8.0 000000 1005.1 4.2 0.0 0.6
24 6 SW 2 7 02 10.3 6.5 77 14.4 6.0 2.3 12.8 12.0 12.5 13.4 13.5 13.0 1 0 1 0 5.9 000000 1013.1 2.5 0.0 2.4
25 7 W 2 7 25 8.7 7.2 90 12.3 6.8 4.7 12.2 12.2 13.1 13.8 13.8 13.0 1 2 3 0 2.2 005t00 1008.3 3.9 0.0 1.8
26 8 S 1 6 61 9.3 6.5 83 10.5 6.1 3.5 12.1 11.8 12.4 13.4 13.7 13.2 1 3 3 0 3.8 004000 1009.1 6.0 0.0 0.6
27 7 SW 3 7 02 9.6 6.6 82 12.7 5.4 3.2 10.9 11.3 12.0 13.2 13.5 13.0 1 0 3 0 0.2 000000 1004.2 0.2 0.0 2.2
28 6 NW 2 8 03 10.2 6.8 80 13.5 4.6 2.3 12.0 11.2 12.0 13.2 13.5 12.9 1 0 1 0 0.5 000000 1003.0 0.8 0.0 1.7
29 3 NW 2 8 01 12.0 6.8 70 15.9 4.4 1.3 14.0 11.8 12.2 13.3 13.5 12.9 0 0 3 0 0.0 000000 1014.6 0.0 0.0 2.1
30 2 S 1 8 02 13.0 7.5 69 14.6 5.9 2.6 14.0 12.3 13.0 13.8 13.5 12.7 0 0 1 0 0.0 000000 1014.2 0.0 0.0 2.2
31 6 S 2 8 02 14.4 4.3 50 16.3 5.6 2.1 13.8 12.5 13.2 14.0 13.8 12.9 0 0 1 0 6.2 000000 1018.1 9.6 0.0 2.5
---------------------------------------------------------------------------------------------------------------------------
Mean
5 12.5 8.7 78 15.6 8.0 5.7 13.7 12.9 13.4 14.0 13.7 12.5 1016.0
Total 53.2 62.3 0.0 60.9
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1990-99 average used by the Climatological Observers Link. Rainfall was 85% of average
Air temperatures Weather (No. days occurrence) and 83% of 1961-90 ave.
Mean maximum 15.6 (-0.4) Sleet/snow falling 0 (-0.3) Most in a day: 8.3mm ON 17th.
Mean minimum 8.0 (+0.4) Snow lying (at 09GMT) 0 (-0.1) No. of days with:
Mean 11.8 ( 0.0) Hail <5 mm 2 [+1.9] >=0.2 mm 14 (+ 1.8)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 1 [all hail] >=1.0 mm 9 (- 0.3)
Mean grass min 5.7 (+0.3) Thunder heard 1 (+0.3) >=5.0 mm 6 (+ 2.0)
Lowest grass min 1.3 (+1.1) Gales 0 Lysimeter:
No. days <0.0C 0 (-0.9) Fog (at 09GMT) 0 PE 63.7 mm
PWB -10.5 mm
Highest maximum 24.1C on 14th. Lowest minimum 4.4 on 29th. PWS 34.3 mm
Minimum relative humidity: 48% on 22nd. PWD -44.8 mm
* Piche: 60.9 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,
10 mist, 20 drizzle in past hour, 25 shower rain in past hour, 60 intermittent sl. rain, 61 continuous sl. rain, 63 cont.
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: 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 at 09GMT.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JUNE 2000
---------------------------------------------------------------------------------------------------------------------------
-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 S 3 5 21 12.8 12.4 98 13.7 10.8 10.1 14.0 13.8 14.0 14.1 13.8 13.0 1 2 3 0 1.0 000000 1010.3 2.3 0.0 0.3
02 8 S 2 5 60 13.2 12.3 90 14.5 11.9 11.6 13.8 13.5 13.5 13.8 13.8 12.9 1 0 3 0 9.5 000000 1014.6 8.7 0.0 0.2
03 7 NE 1 6 02 13.8 12.5 92 13.8 11.8 11.2 16.5 14.8 14.0 14.2 13.6 13.1 1 1 3 0 5.7 000000 1018.1 4.8 0.0 0.2
04 8 SW 2 7 02 10.9 9.9 90 15.0 9.7 10.2 13.5 13.5 13.9 14.2 13.8 13.0 1 0 3 0 0.0 000000 1015.8 0.0 0.0 0.9
05 8 SW 1 7 05 11.8 9.6 87 14.6 8.4 5.8 14.4 13.9 14.0 14.3 13.9 13.1 1 0 1 0 tr 000000 1020.4 0.0 0.0 0.9
06 8 SW 2 6 25 12.1 10.6 90 16.7 9.3 7.6 13.5 13.4 13.6 14.2 14.0 13.1 1 0 3 0 tr 000000 1018.9 0.0 0.0 2.0
07 3 W 3 7 01 13.3 8.3 72 15.5 7.3 4.8 15.0 13.5 13.7 14.4 14.1 13.2 0 0 1 0 0.1 000000 1024.2 0.5 0.0 2.8
08 6 S 5 7 01 13.2 8.2 72 15.0 11.0 9.4 14.5 14.2 14.3 14.7 14.2 13.3 0 0 0 0 4.2 000000 1012.7 5.5 0.0 1.6
09 8 NE 2 5 63 9.7 9.5 99 13.0 9.0 7.6 12.6 13.2 14.0 14.3 14.2 13.3 1 3 3 0 5.1 000000 1009.1 5.1 0.0 0.8
10 4 SW 4 7 02 13.0 8.0 71 15.3 7.0 4.0 13.9 12.3 12.6 13.7 13.8 13.3 1 0 1 0 0.9 000000 1016.2 2.2 0.0 2.6
11 6 SW 4 7 02 12.8 8.6 76 14.5 8.3 6.3 14.3 13.2 13.5 14.2 14.0 13.4 1 0 3 0 tr 000000 1016.6 0.0 0.0 1.9
12 8 S 5 6 02 13.7 12.4 92 16.6 11.9 11.6 14.3 14.0 14.0 14.3 14.0 13.4 0 0 0 0 1.3 000000 1020.1 0.7 0.0 0.9
13 6 SW 3 6 05 14.1 10.7 80 17.1 11.9 11.7 15.2 14.4 14.2 14.5 14.1 13.4 1 0 3 0 4.3 000000 1022.7 5.8 0.0 2.5
14 8 00 0 5 53 11.8 11.5 96 13.2 10.2 9.2 14.5 14.3 14.5 14.8 14.5 13.5 1 3 3 0 0.6 000000 1021.2 0.5 0.0 0.3
15 8 SW 1 7 05 13.2 11.7 91 17.5 10.4 9.0 14.8 14.4 14.2 14.6 14.5 13.5 1 0 3 0 0.0 000000 1026.0 0.0 0.0 1.5
16 1 NE 2 8 01 17.5 13.5 77 24.5 9.2 6.2 16.8 14.4 14.4 15.0 14.6 13.6 0 0 1 0 0.0 000000 1026.1 0.0 0.0 2.5
17 4 SE 5 7 05 24.3 16.6 62 24.8 14.4 12.0 19.5 17.7 17.0 16.7 15.4 13.8 0 0 1 0 0.0 000000 1022.3 0.0 0.0 2.0
18 1 NE 1 7 02 22.6 17.8 74 29.0 12.5 10.4 20.0 17.5 17.0 17.1 16.1 14.1 0 0 1 0 0.0 000000 1022.7 0.0 0.0 2.8
19 7 SW 4 5 10 16.4 14.9 91 18.8 15.1 12.2 19.3 18.7 18.5 18.3 16.7 14.4 0 0 1 0 0.2 000000 1013.5 0.6 0.0 2.1
20 7 S 2 7 03 16.8 14.2 85 17.8 14.0 13.5 17.8 17.5 17.8 17.8 16.8 14.7 0 1 3 0 3.2 000000 1010.3 3.2 0.0 1.9
21 7 SW 5 7 02 13.4 10.9 85 16.7 11.6 10.8 15.7 16.1 16.7 17.2 16.5 14.9 1 1 3 0 3.4 000000 1003.4 3.2 0.0 2.4
22 8 SW 4 5 50 12.3 11.5 95 15.7 11.5 11.0 15.0 15.2 15.8 16.6 16.4 14.9 1 3 3 0 0.2 000000 1003.4 0.0 0.0 1.0
23 7 NW 3 7 02 12.1 8.9 81 15.9 11.2 9.5 15.2 15.0 15.5 16.2 16.0 15.0 1 0 3 0 1.0 000000 1017.8 2.5 0.0 2.0
24 7 NW 2 7 25 12.2 8.8 80 14.5 9.1 8.9 15.8 15.0 15.5 16.2 16.0 15.0 1 3 3 0 tr 000000 1020.1 0.0 0.0 1.1
25 7 00 0 7 05 11.8 9.2 84 13.6 7.2 4.3 15.0 14.5 15.0 15.8 16.0 15.0 0 0 1 0 tr 000000 1023.5 0.0 0.0 0.7
26 6 NE 1 7 05 13.2 11.6 82 16.5 7.2 4.8 16.0 14.1 14.2 15.3 15.5 15.0 0 0 1 0 0.0 000000 1026.5 0.0 0.0 1.7
27 4 NE 2 7 05 15.7 11.5 76 19.0 8.8 6.5 16.2 14.6 14.8 15.6 15.5 14.8 0 0 1 0 0.0 000000 1025.4 0.0 0.0 2.3
28 0 NE 1 6 05 18.8 13.2 70 22.0 11.1 8.6 19.0 16.6 16.4 16.5 16.0 14.9 0 0 1 0 0.0 000000 1022.3 0.0 0.0 2.0
29 7 NE 1 6 05 18.2 11.5 65 21.0 13.5 10.6 19.4 18.3 18.0 17.5 16.5 15.0 0 0 1 0 tr 000000 1022.0 0.0 0.0 1.6
30 8 NE 1 4 50 13.2 12.5 95 19.5 12.2 10.0 16.6 17.0 17.2 17.3 16.6 15.0 0 0 3 0 0.3 00000F 1013.1 0.8 0.0 1.2
---------------------------------------------------------------------------------------------------------------------------
Mean
6 14.3 11.4 83 17.2 10.6 9.0 15.7 15.0 15.1 15.4 15.0 14.0 1018.0
Total 41.0 46.4 0.0 46.5
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1990-99 average used by the Climatological Observers Link. Rainfall was 60% of average
Air temperatures Weather (No. days occurrence) and 54% of 1961-90 ave.
Mean maximum 17.2 (-0.1) Sleet/snow falling 0 ( 0.0) Most in a day: 9.5mm on 2nd.
Mean minimum 10.6 (+0.9) Snow lying (at 09GMT) 0 ( 0.0) No. of days with:
Mean 13.9 (+0.4) Hail <5 mm 0 [-0.2] >=0.2 mm 15 (- 0.9)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 [all hail] >=1.0 mm 10 (- 1.0)
Mean grass min 9.0 (+0.8) Thunder heard 0 (-0.9) >=5.0 mm 3 (- 1.6)
Lowest grass min 4.0 (+0.9) Gales 0 Lysimeter:
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 0 PE 48.8 mm
PWB -7.8 mm
Highest maximum 29.0C on 18th. Lowest minimum 7.0C on 10th. PWS 28.1 mm
Minimum relative humidity: 46% on 18th. PWD -35.9 mm
* Was the 16th driest June in records since 1928. Mean 13.9C warmest since 1993 (14.5C). Piche: 46.5 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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
10 mist, 21 rain in past hour, 25 shower of rain in past hour, 50 slight drizzle, 53 continuous moderate drizzle,
60 intermittent slight rain, continuous moderate 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: 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 at 09GMT.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JULY 2000
---------------------------------------------------------------------------------------------------------------------------
-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 00 0 5 60 15.9 14.2 89 18.9 13.2 11.5 18.2 17.8 18.0 17.8 16.9 15.2 0 2 3 0 0.9 000000 1009.5 1.8 0.0 0.7
02 7 NE 1 6 05 16.3 13.5 83 16.7 11.4 8.5 16.9 16.4 16.8 17.3 16.9 15.3 0 0 1 0 4.0 000000 1011.5 3.1 0.0 0.5
03 7 00 0 7 02 16.7 14.1 85 19.0 12.7 10.4 18.2 17.0 16.8 17.2 16.8 15.3 1 0 3 0 1.3 000000 1011.5 1.5 0.0 1.0
04 7 NE 1 5 05 16.3 14.4 88 19.2 14.0 12.5 18.7 17.8 17.2 17.7 16.9 15.4 0 0 3 0 0.0 00000F 1009.5 0.0 0.0 1.3
05 6 NE 1 5 10 16.2 14.6 90 19.8 12.6 11.6 17.8 17.5 18.0 18.0 17.5 15.5 0 0 2 0 0.0 00000F 1013.9 0.0 0.0 1.2
06 6 SW 2 5 05 17.1 12.8 76 19.0 12.0 9.5 18.2 17.3 17.5 17.8 17.2 15.6 0 0 2 0 0.0 000000 1040.0 0.0 0.0 1.1
07 6 NE 2 7 05 12.5 9.8 83 16.3 11.7 10.6 17.5 17.0 17.5 17.6 17.1 15.6 0 0 0 0 0.3 000000 1023.9 1.5 0.0 1.6
08 6 NW 2 7 25 13.6 11.9 90 16.2 11.4 11.0 17.9 17.8 18.0 17.7 17.2 15.8 0 1 3 0 5.2 000000 1020.1 6.5 0.0 0.9
09 8 W 2 6 60 13.1 12.2 94 16.8 12.5 12.4 16.2 16.3 16.8 17.2 17.0 16.9 1 3 3 0 13.5 000000 998.9 9.0 0.0 0.7
10 8 N 5 6 10 11.0 10.4 96 14.1 10.0 9.5 13.6 14.5 15.8 16.8 16.9 15.9 1 2 3 0 1.3 000000 997.2 1.5 0.0 1.3
11 5 NE 3 8 01 11.8 8.2 78 15.3 8.7 7.5 15.2 14.3 15.0 16.2 16.4 15.8 1 1 3 0 0.0 000000 1010.3 0.0 0.0 1.8
12 7 NW 2 7 05 14.6 10.2 75 16.7 9.1 5.7 16.0 15.3 15.8 16.5 16.3 15.8 1 0 1 0 3.5 000000 1014.6 8.0 0.0 1.1
13 8 W 2 7 20 13.5 12.6 94 16.4 12.0 12.0 16.1 15.9 16.1 16.7 16.5 15.6 1 2 3 0 0.7 000000 1013.9 0.3 0.0 1.1
14 7 NW 3 7 05 13.0 10.1 83 16.7 10.9 9.8 15.4 15.3 15.8 16.5 16.4 15.4 1 0 3 0 0.0 000000 1015.4 0.0 0.0 1.2
15 8 NE 2 7 05 12.8 10.7 87 17.2 10.0 7.6 15.5 15.3 15.9 16.5 16.5 15.5 0 0 1 0 0.0 000000 1020.1 0.0 0.0 1.6
16 7 N 1 7 05 15.2 12.1 82 17.5 9.8 7.9 18.1 16.9 16.7 16.9 16.5 15.5 0 0 1 0 0.0 000000 1022.0 0.0 0.0 1.3
17 2 N 1 7 05 15.8 11.4 75 18.5 8.5 5.8 17.5 15.7 15.5 16.9 16.5 15.5 0 0 1 0 0.0 000000 1022.0 0.0 0.0 1.2
18 1 NE 1 7 05 16.7 10.5 67 21.2 8.5 5.9 17.0 15.8 16.9 17.2 17.0 16.0 0 0 1 0 0.0 000000 1023.9 0.0 0.0 1.8
19 1 S 1 8 02 18.3 12.4 69 22.1 10.7 8.3 18.5 17.2 17.6 17.8 17.2 15.8 0 0 1 0 0.0 000000 1023.9 0.0 0.0 2.4
20 7 NE 2 7 04 15.1 12.2 83 19.1 12.7 11.2 18.5 18.3 18.2 17.9 17.3 16.0 0 0 1 0 0.0 000000 1026.8 0.0 0.0 1.8
21 0 N 1 7 04 16.8 13.5 81 20.2 9.3 6.2 17.8 16.6 17.5 17.7 17.5 16.1 0 0 1 0 0.0 000000 1028.3 0.0 0.0 2.1
22 1 NE 2 7 05 18.0 13.8 77 21.5 14.5 12.5 19.1 18.1 18.5 18.4 17.8 16.3 0 0 0 0 0.0 000000 1025.7 0.0 0.0 2.7
23 1 E 2 7 05 16.0 11.4 74 19.5 11.5 9.5 18.7 17.6 18.5 18.5 18.0 16.4 0 0 0 0 0.0 000000 1019.3 0.0 0.0 2.3
24 6 NE 3 6 05 14.3 11.1 81 18.0 11.8 8.5 18.0 17.4 18.0 18.2 18.0 16.4 0 0 0 0 tr 000000 1015.4 0.0 0.0 1.6
25 8 NE 1 5 10 14.5 11.7 83 16.0 13.1 12.4 18.3 18.5 19.0 18.4 18.0 16.6 0 0 0 0 tr 000000 1009.9 0.0 0.0 0.9
26 8 00 0 5 60 14.6 12.6 88 21.0 11.3 9.4 17.2 17.2 17.5 17.8 17.7 16.5 0 1 3 0 1.2 000000 1010.3 0.7 0.0 1.6
27 5 S 2 7 05 18.2 13.5 74 20.8 12.3 8.6 18.2 17.2 17.2 17.8 17.8 16.7 0 0 1 0 5.5 000000 1013.5 0.4 0.0 1.6
28 7 SW 2 6 10 17.4 15.2 87 21.0 14.2 12.1 18.5 17.6 17.8 18.0 17.8 16.6 1 0 3 0 0.1 000000 1014.2 0.0 0.0 1.7
29 7 SW 1 6 10 17.2 15.0 87 19.3 13.9 12.4 18.9 17.9 18.0 18.2 17.8 16.6 0 0 3 0 18.4 000000 1018.1 0.7 0.0 0.9
30 6 SW 2 7 05 18.7 15.7 83 21.2 12.7 9.8 18.3 16.5 17.0 17.8 17.7 16.7 1 0 1 0 7.4 000000 1022.7 7.8 0.0 1.6
31 8 S 3 6 10 15.4 15.1 98 17.4 14.3 13.4 16.9 17.2 18.0 18.2 17.8 16.7 1 3 3 0 6.6 000000 1021.2 6.3 0.0 1.0
---------------------------------------------------------------------------------------------------------------------------
Mean
6 15.4 12.5 83 18.5 11.7 9.8 17.4 16.8 17.2 17.5 17.2 16.0 1017.0
Total 69.9 49.1 0.0 43.6
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1990-99 average used by the Climatological Observers Link. Rainfall was 126% of average
Air temperatures Weather (No. days occurrence) but was 95% of 1961-90 ave.
Mean maximum 18.5 (-1.2) Sleet/snow falling 0 ( 0.0) Most in a day: 18.4mm on 29th.
Mean minimum 11.7 (-0.4) Snow lying (at 09GMT) 0 ( 0.0) No. of days with:
Mean 15.1 (-0.8) Hail <5 mm 0 [-0.1] >=0.2 mm 14 (- 0.4)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 [all hail] >=1.0 mm 11 (+ 1.2)
Mean grass min 9.8 (-0.8) Thunder heard 0 (-0.6) >=5.0 mm 6 (+ 2.2)
Lowest grass min 5.7 ( 0.0) Gales 0 Lysimeter:
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 0 PE 62.4 mm
PWB 7.5 mm
Highest maximum 22.1C on 19th. Lowest minimum 8.5 on 17th & 18th. PWS 52.7 mm
Minimum relative humidity: 56% on 19th. PWD -45.2 mm
* Piche: 43.6 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,
20 drizzle in past hour, 25 rain shower in past hour, 60 intermittent slight 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: 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 at 09GMT.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR AUGUST 2000
---------------------------------------------------------------------------------------------------------------------------
-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 16.0 12.6 80 19.6 13.2 11.7 16.5 16.0 17.0 17.6 17.7 16.6 1 0 3 0 11.9 000000 1017.4 3.2 0.0 2.7
02 8 SW 4 6 10 14.5 13.6 94 17.7 13.7 13.2 17.1 17.0 17.2 17.8 17.7 16.6 1 2 3 0 25.2 000000 1009.5 4.3 0.0 0.8
03 8 NE 2 5 02 13.7 13.5 99 18.9 11.8 11.4 16.2 16.2 16.7 17.3 17.5 16.6 1 2 3 0 0.0 000000 1016.2 0.0 0.0 0.9
04 7 W 2 7 01 15.0 12.5 85 16.5 10.6 7.2 17.0 16.4 16.5 17.2 17.3 16.6 1 0 1 0 tr 000000 1025.7 0.0 0.0 0.8
05 4 S 2 7 05 16.5 13.5 82 20.8 13.1 9.5 17.0 15.9 15.2 17.0 17.2 16.5 1 0 1 0 0.7 000000 1027.6 1.6 0.0 1.3
06 8 NW 1 7 10 17.2 16.5 96 20.7 15.4 15.3 18.5 18.0 18.0 18.0 17.4 16.5 1 2 3 0 0.3 000000 1028.3 0.5 0.0 0.7
07 8 SW 1 4 10 16.2 15.9 98 18.1 15.0 13.6 17.9 17.7 17.9 18.1 17.7 16.5 1 3 3 0 3.3 00000F 1028.0 5.1 0.0 0.6
08 8 SW 1 4 10 16.3 16.1 99 20.6 14.7 13.4 17.2 17.0 17.5 17.8 17.6 16.5 1 3 3 0 4.0 000000 1023.1 0.7 0.0 0.9
09 7 S 5 7 02 17.7 14.8 83 17.8 14.4 13.3 18.0 17.5 17.8 18.2 17.7 16.5 1 0 3 0 7.0 000000 1017.4 6.0 0.0 0.5
10 7 W 1 6 50 15.7 15.2 97 17.5 14.5 14.2 17.7 17.0 17.2 17.8 17.6 16.6 1 3 3 0 tr 000000 1018.5 0.0 0.0 0.9
11 6 S 2 7 05 17.1 14.1 83 21.0 13.4 11.2 17.7 16.9 17.0 17.8 17.5 16.5 1 0 3 0 tr 000000 1018.9 0.0 0.0 1.9
12 8 S 4 7 02 16.5 14.4 88 18.1 13.4 11.0 17.5 17.7 18.0 18.2 17.7 16.7 1 0 3 0 9.9 000000 1014.2 6.4 0.0 0.6
13 8 SW 2 7 02 16.8 16.6 99 20.3 15.7 15.2 17.7 17.7 17.8 18.0 17.8 16.7 1 2 3 0 11.7 000000 1013.9 7.9 0.0 0.4
14 8 W 1 2 46 16.5 16.5 100 17.7 15.9 15.2 17.5 17.7 18.0 18.1 17.8 16.5 1 3 3 0 4.5 00000F 1011.5 3.7 0.0 0.6
15 7 SW 5 7 10 15.7 14.6 88 18.5 11.5 9.6 16.0 16.0 16.8 17.7 17.6 16.8 1 0 1 0 4.4 000000 1018.9 2.3 0.0 1.5
16 7 SW 3 7 05 15.2 12.1 82 18.8 10.6 8.3 15.4 15.3 16.2 17.3 17.5 16.8 1 0 3 0 tr 000000 1013.1 0.0 0.0 2.0
17 5 SW 3 7 05 15.0 12.1 83 18.8 10.6 7.3 15.0 15.2 16.4 17.3 17.5 16.8 1 0 1 0 0.0 000000 1010.3 0.0 0.0 2.3
18 3 SW 1 8 02 14.8 11.9 83 19.4 10.3 6.2 15.3 15.0 16.2 17.3 17.4 16.5 1 0 1 0 0.8 000000 1012.3 0.2 0.0 1.3
19 4 NW 1 7 03 14.5 11.7 83 18.6 10.8 9.5 16.2 16.0 17.0 17.5 17.4 16.5 1 0 3 0 3.7 004000 1011.5 0.2 0.0 1.2
20 1 00 0 8 03 15.2 9.6 69 17.9 8.8 6.5 13.8 14.2 15.8 17.2 17.4 16.5 1 0 1 0 10.7 006t00 1015.4 0.7 0.0 0.9
21 4 00 0 7 03 11.8 11.2 96 17.5 9.0 6.8 13.5 14.0 15.2 16.5 17.0 16.5 1 2 3 0 9.2 000T00 1015.4 1.0 0.0 1.1
22 2 NE 1 8 01 15.4 11.3 77 20.3 9.6 7.4 14.6 14.2 15.5 16.5 16.8 16.5 1 0 1 0 0.0 000000 1018.9 0.0 0.0 1.8
23 0 E 1 7 05 17.2 13.9 81 22.0 11.8 8.8 15.5 15.0 16.2 17.1 17.1 16.4 1 0 1 0 0.0 000000 1025.7 0.0 0.0 1.9
24 1 NE 1 7 05 17.5 13.8 79 20.3 11.4 8.6 15.3 15.5 16.8 17.5 17.3 16.4 1 0 1 0 0.0 000000 1026.5 0.0 0.0 2.3
25 1 NE 1 7 05 20.0 14.9 73 24.7 12.4 9.8 17.0 16.4 17.7 17.8 17.5 16.5 0 0 1 0 15.3 000T00 1021.2 5.6 0.0 2.0
26 7 S 4 6 05 16.9 15.2 90 18.8 15.6 14.5 17.5 17.5 17.8 18.0 17.8 16.6 1 1 3 0 3.2 000t00 1008.3 1.8 0.0 0.9
27 7 W 2 6 80 14.4 13.7 95 18.4 12.2 10.5 16.2 16.3 17.0 17.8 17.8 16.8 1 2 3 0 tr 000000 1013.1 0.0 0.0 1.4
28 7 SW 1 5 25 14.9 13.3 90 17.7 11.2 9.2 16.0 15.9 16.5 17.5 17.7 16.8 1 0 3 0 0.2 000000 1017.4 0.3 0.0 0.8
29 1 NE 1 7 02 13.5 12.0 91 18.5 8.8 6.6 14.0 14.0 15.7 17.0 17.3 16.6 1 0 1 0 0.0 000000 1022.0 0.0 0.0 1.3
30 1 NE 1 7 05 15.8 12.2 79 19.9 10.2 7.6 15.1 15.0 16.2 17.2 17.3 16.5 1 0 1 0 0.4 000000 1022.0 0.3 0.0 1.7
31 7 S 5 6 25 14.7 12.5 87 16.5 12.9 10.1 15.4 15.8 16.8 17.2 17.2 16.5 1 2 3 0 6.0 000000 1007.9 4.5 0.0 0.8
---------------------------------------------------------------------------------------------------------------------------
Mean
5 15.7 13.6 87 19.1 12.3 10.4 16.3 16.1 16.8 17.5 17.5 16.6 1017.7
Total 132.4 56.3 0.0 38.8
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1990-99 average used by the Climatological Observers Link. Rainfall was 200% of average
Air temperatures Weather (No. days occurrence) but 145% of 1961-90 ave.
Mean maximum 19.1 (-0.6) Sleet/snow falling 0 ( 0.0) Most in a day: 25.2mm on 2nd.
Mean minimum 12.3 (+0.1) Snow lying (at 09GMT) 0 ( 0.0) No. of days with:
Mean 15.7 (-0.3) Hail <5 mm 1 [+2.0] >=0.2 mm 20 (+ 6.0)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 1 [all hail] >=1.0 mm 15 (+ 4.6)
Mean grass min 10.4 (-0.1) Thunder heard 4 (+3.1) >=5.0 mm 9 (+ 4.2)
Lowest grass min 6.2 (+0.5) Gales 0 Lysimeter:
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 1 PE 33.2 mm
PWB 99.2 mm
Highest maximum 24.7C on 25th. Lowest minimum 8.8 on 20, 29th. PWS 110.3 mm
Minimum relative humidity: 48% on 25th. PWD -11.0 mm
* Wettest August since 1992; only 13 wetter since 1928. Piche: 38.8 ml
Most no. days with thunder (4) and all types of hail (2) in records since 1979.
---------------------------------------------------------------------------------------------------------------------------
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, 25 shower rain in past hour, 46 fog thicker in past hour, 50 slight drizzle, 80 slight rain shower.
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: 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 at 09GMT.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR SEPTEMBER 2000
---------------------------------------------------------------------------------------------------------------------------
-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 2 7 02 13.8 12.3 91 18.2 12.0 10.0 15.0 15.1 15.8 16.8 17.1 16.5 1 2 3 0 2.7 000000 999.7 1.5 0.0 0.8
02 7 NE 2 7 02 15.5 13.7 89 18.0 11.0 8.2 15.6 15.5 16.0 16.8 16.9 16.4 1 1 3 0 0.0 000000 1009.5 0.0 0.0 1.7
03 5 N 1 7 05 14.6 11.0 79 18.6 9.7 6.4 15.5 15.0 15.8 16.8 16.9 16.3 1 0 1 0 0.0 000000 1022.0 0.0 0.0 1.7
04 6 SW 1 7 05 14.9 11.4 79 19.0 9.0 6.7 15.0 14.5 15.6 16.7 16.8 16.3 1 0 1 0 5.6 000000 1023.9 6.0 0.0 1.8
05 8 NW 1 6 10 15.8 15.1 96 19.1 14.3 13.9 17.0 16.2 16.5 16.8 16.8 16.3 1 2 3 0 4.6 000000 1019.3 4.0 0.0 0.9
06 5 NW 3 7 10 13.5 10.0 80 17.7 12.8 11.5 15.6 15.8 16.5 17.0 17.0 16.3 1 2 3 0 2.4 000000 1010.3 2.4 0.0 2.0
07 8 SW 5 6 60 15.5 15.2 98 16.7 10.7 8.4 15.0 15.0 16.0 16.9 17.0 16.3 1 3 3 0 1.2 000000 1009.9 1.3 0.0 0.3
08 8 SW 2 6 10 14.8 13.0 89 16.3 11.6 9.5 15.0 15.0 15.5 16.5 16.8 16.2 1 0 3 0 0.1 000000 1017.4 0.0 0.0 1.4
09 8 00 0 7 05 13.0 12.4 96 16.8 10.4 8.0 13.8 14.0 15.0 16.2 16.5 16.2 1 0 1 0 7.6 000000 1023.1 6.6 0.0 0.8
10 8 S 3 6 10 16.8 16.3 97 22.0 12.9 12.8 16.7 16.5 16.1 16.4 16.5 16.2 1 2 3 0 0.0 000000 1022.0 0.0 0.0 1.3
11 6 SE 1 7 05 21.3 15.5 69 24.3 16.2 12.9 18.5 17.0 17.0 17.0 16.8 16.0 1 0 1 0 tr 000000 1014.2 0.0 0.0 1.2
12 8 N 2 5 50 15.2 14.3 95 15.5 14.2 13.4 16.6 17.0 17.2 17.3 17.0 16.0 1 0 3 0 tr 000000 1011.5 0.0 0.0 0.3
13 7 SE 1 7 05 14.4 11.0 80 16.5 11.5 8.9 15.7 15.5 16.0 16.8 16.8 16.1 1 0 3 0 0.4 000000 1015.0 1.6 0.0 1.3
14 6 SW 2 7 05 13.9 12.3 90 18.3 12.1 10.6 15.5 15.5 16.0 16.5 16.6 16.2 1 1 3 0 1.5 000000 1013.1 2.8 0.0 0.9
15 8 NE 1 4 61 12.2 11.8 98 15.5 12.0 11.5 14.6 15.3 16.0 16.6 16.8 16.0 1 3 3 0 1.4 000000 1009.5 4.1 0.0 0.7
16 8 NW 1 7 02 13.2 11.9 92 15.5 10.7 7.5 14.5 14.5 15.8 16.2 16.5 16.0 1 0 1 0 1.1 000000 1015.0 1.3 0.0 0.6
17 7 SW 3 6 10 14.1 12.6 91 15.0 11.5 8.0 15.0 15.0 15.3 16.2 16.4 16.0 1 1 3 0 22.4 000000 1011.5 11.1 0.0 0.5
18 2 W 2 7 01 11.0 10.0 94 15.2 9.0 7.3 13.2 13.5 14.8 15.7 16.0 16.0 1 2 3 0 0.0 000000 1001.1 0.0 0.0 1.5
19 6 00 0 8 03 9.7 8.0 89 16.6 6.1 2.2 10.8 11.6 13.7 15.1 15.8 15.8 1 0 1 0 32.2 000000 1001.1 10.0 0.0 1.1
20 8 S 1 7 21 10.4 9.6 95 13.8 8.4 7.1 12.5 12.7 14.0 14.9 15.5 15.8 1 2 3 0 0.2 000000 999.3 1.5 0.0 1.0
21 7 S 2 7 02 12.2 9.9 86 17.1 7.2 2.8 11.8 11.7 13.0 14.5 15.3 15.5 1 0 1 0 6.0 000000 1006.3 3.2 0.0 1.6
22 7 SW 4 6 10 14.0 12.5 91 19.0 11.8 9.8 13.2 13.4 14.0 14.7 15.1 15.2 1 2 3 0 5.2 000000 1013.1 1.9 0.0 2.1
23 6 SE 4 7 01 19.0 14.4 75 23.2 10.6 5.8 14.5 14.3 14.5 14.8 15.0 15.2 1 2 3 0 0.0 000000 1015.4 0.0 0.0 3.4
24 8 S 3 7 02 14.7 12.5 87 15.3 14.7 13.3 15.5 15.3 15.6 15.4 15.3 15.1 1 0 0 0 5.8 000000 1012.3 3.8 0.0 0.5
25 5 SW 2 7 01 13.5 13.0 97 19.5 10.3 5.8 13.2 13.8 14.2 15.1 15.5 15.2 1 2 1 0 5.2 000000 1017.0 6.0 0.0 1.2
26 8 E 1 7 02 15.2 13.8 91 16.4 12.7 11.8 15.5 15.0 15.0 15.3 15.3 15.1 1 2 3 0 8.5 000000 1010.3 6.5 0.0 0.4
27 8 SW 5 7 05 14.1 12.1 88 14.1 11.2 10.0 14.0 14.2 15.0 15.3 15.3 15.1 1 1 3 0 24.5 0000G0 1005.1 11.2 0.0 0.8
28 2 S 2 8 01 10.6 8.8 89 16.3 8.5 6.2 11.9 12.2 13.5 14.6 15.2 15.1 1 2 3 0 0.0 000000 993.8 0.0 0.0 2.7
29 6 SE 1 7 02 13.6 9.9 79 19.5 10.4 9.0 13.2 13.2 13.7 14.5 15.0 15.0 1 0 1 0 0.0 000000 993.8 0.0 0.0 1.3
30 1 E 2 7 05 13.0 11.1 88 18.2 10.0 6.6 11.8 12.6 14.0 14.7 15.0 15.0 1 0 1 0 0.0 000000 1002.2 0.0 0.0 1.1
---------------------------------------------------------------------------------------------------------------------------
Mean
7 14.1 12.2 89 17.6 11.1 8.9 14.5 14.5 15.2 15.9 16.2 15.8 1010.6
Total 138.6 86.8 0.0 36.9
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1990-99 average used by the Climatological Observers Link. Rainfall was 153% of average
Air temperatures Weather (No. days occurrence) and 151% of 1961-90 ave.
Mean maximum 17.6 (+0.4) Sleet/snow falling 0 ( 0.0) Most in a day: 32.2mm ON 19th.
Mean minimum 11.1 (+1.0) Snow lying (at 09GMT) 0 ( 0.0) No. of days with:
Mean 14.3 (+0.7) Hail <5 mm 0 [-0.5] >=0.2 mm 19 (+ 4.5)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 [all hail] >=1.0 mm 17 (+ 4.7)
Mean grass min 8.9 (+0.9) Thunder heard 0 (-0.9) >=5.0 mm 10 (+ 3.9)
Lowest grass min 2.2 (-0.6) Gales 1 Lysimeter:
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 0 PE 16.1 mm
PWB 122.5 mm
Highest maximum 24.3C on 11th. Lowest minimum 6.1 on 19th. PWS 123.9 mm
Minimum relative humidity: 45% on 19th. PWD -1.3 mm
* It is the 15th wettest September in records since 1928. Piche: 36.9 ml
Minimum of 16.2C and mean of 20.3C on 11th are highest in September in records since 1979.
---------------------------------------------------------------------------------------------------------------------------
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, 21 rain in past hour, 50 slight drizzle, 60 intermittent sl. rain, 61 continuous sl. 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: 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 at 09GMT.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR OCTOBER 2000
---------------------------------------------------------------------------------------------------------------------------
-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 3 6 03 13.5 11.6 89 14.1 9.2 5.7 11.9 12.3 13.5 14.4 15.0 15.0 1 0 1 0 7.0 000000 1003.4 5.1 0.0 1.3
02 7 NW 4 6 01 11.4 9.2 86 15.3 10.5 9.5 12.3 12.7 13.5 14.3 14.8 14.9 1 2 3 0 0.4 000000 1004.2 1.0 0.0 1.6
03 7 S 6 5 60 15.3 14.4 95 18.8 8.8 5.5 13.8 13.5 13.5 14.1 14.6 14.8 1 2 3 0 2.5 0000G0 1010.3 2.5 0.0 2.2
04 6 W 4 6 03 11.3 7.8 79 14.6 7.6 3.2 11.2 11.9 13.3 14.3 14.8 14.8 1 0 1 0 17.0 000000 1016.2 6.8 0.0 1.3
05 6 NW 2 7 01 9.0 8.0 93 13.5 6.4 2.6 10.2 11.0 12.5 13.8 14.5 14.8 1 2 3 0 1.8 000t00 1014.2 2.1 0.0 0.6
06 7 NW 1 7 03 9.4 7.9 91 12.8 4.6 0.5 9.0 9.7 11.5 13.2 14.0 14.5 1 0 1 0 6.4 000000 1028.0 4.2 0.0 0.8
07 8 SW 1 5 10 12.6 12.2 98 14.5 9.2 8.2 12.3 12.1 13.5 13.2 13.8 14.3 1 2 3 0 1.8 000000 1020.1 0.6 0.0 0.4
08 6 NW 1 7 01 8.1 7.0 93 12.6 5.1 1.3 9.6 10.4 12.0 13.2 13.8 14.3 1 2 3 0 6.2 000000 1016.2 7.0 0.0 0.9
09 8 S 4 7 61 9.4 7.9 91 11.6 5.6 1.9 9.8 10.4 11.6 12.8 13.6 14.1 1 3 3 0 12.3 0000G0 993.8 13.0 0.0 0.6
10 8 W 5 7 10 8.1 6.6 90 11.0 7.2 5.4 9.5 10.2 11.1 12.2 13.2 14.0 1 2 3 0 0.4 000000 982.1 0.3 0.0 1.1
11 7 SW 1 7 10 7.1 6.4 96 12.7 3.9 -0.2 8.4 9.0 10.5 12.0 12.8 13.7 1 2 3 0 9.8 000000 967.2 5.5 0.0 0.4
12 8 N 1 5 63 9.3 9.1 99 12.0 6.2 1.5 9.5 10.0 11.0 11.8 12.8 13.7 1 3 3 0 2.3 000000 983.9 0.5 0.0 0.8
13 7 N 1 5 80 10.7 10.1 96 13.7 9.3 8.0 10.8 11.0 11.5 12.0 12.7 13.4 1 3 3 0 7.2 000000 1008.3 11.3 0.0 0.9
14 8 S 2 4 59 12.1 11.9 99 13.2 9.2 6.5 11.6 11.5 11.8 12.2 12.8 13.2 1 3 3 0 15.3 000000 1010.3 7.5 0.0 0.2
15 1 S 1 7 10 9.7 9.5 97 15.3 7.1 2.5 8.3 9.4 11.0 12.1 12.8 13.2 1 2 1 0 tr 000000 1012.3 0.0 0.0 1.2
16 7 S 2 7 80 11.1 8.0 81 14.3 7.1 2.0 9.0 9.5 10.6 12.0 12.5 13.1 1 0 1 0 0.4 000000 1003.0 0.3 0.0 1.8
17 3 S 2 7 05 9.6 6.2 79 13.3 5.5 0.4 7.5 8.5 10.2 11.5 12.3 13.1 1 0 1 0 3.9 0000G0 1018.1 5.2 0.0 1.8
18 6 S 2 6 01 11.4 9.6 89 14.8 9.5 6.7 10.5 10.8 11.3 11.8 12.2 13.0 1 2 3 0 0.9 000000 1010.3 0.5 0.0 1.8
19 1 SW 2 7 02 9.2 6.6 84 13.2 7.8 3.9 8.7 9.5 10.9 11.6 12.2 12.8 1 2 3 0 0.3 000000 1014.2 0.3 0.0 2.2
20 6 S 3 7 03 11.5 7.8 78 13.0 6.8 1.3 9.2 9.5 10.3 11.3 12.2 12.8 1 0 0 0 6.8 000000 1010.3 0.5 0.0 0.6
21 7 00 0 7 01 7.4 6.5 94 14.7 6.6 2.5 9.0 9.6 10.5 11.2 12.0 12.8 1 0 1 0 0.0 000000 1018.9 0.0 0.0 1.1
22 6 S 2 7 03 9.2 5.2 76 12.5 4.2 -0.7 7.2 7.8 9.5 11.0 11.6 12.6 1 0 4 0 6.5 000000 1021.2 1.8 0.0 2.4
23 7 SW 4 6 80 11.5 9.7 89 13.7 9.0 6.3 10.2 10.2 10.7 11.0 11.6 12.4 1 2 3 0 4.7 000000 1008.3 6.0 0.0 0.9
24 8 W 3 7 10 9.6 8.4 92 12.4 8.8 6.8 10.0 10.5 11.0 11.2 11.8 12.4 1 2 3 0 13.3 0000G0 1015.8 14.5 0.0 1.4
25 7 NW 4 7 01 9.5 6.3 80 12.3 9.2 8.2 10.5 11.0 11.2 11.3 11.8 12.2 1 2 3 0 0.5 000000 1003.8 0.8 0.0 1.4
26 7 W 2 7 03 9.0 6.6 85 13.2 7.2 3.0 9.0 9.4 10.5 11.2 11.8 12.2 1 2 3 0 29.6 000000 1013.1 11.0 0.0 1.0
27 8 SW 5 4 63 13.2 13.2 100 14.5 8.8 7.9 12.0 11.5 11.2 11.2 11.6 12.2 2 3 3 0 9.3 000000 1003.4 1.7 0.0 0.6
28 8 SE 1 5 65 9.2 9.0 99 14.6 8.3 4.0 9.8 10.0 11.0 11.5 11.8 12.2 2 3 3 0 9.5 0000G0 996.8 4.2 0.0 2.3
29 6 W 6 7 01 8.2 4.3 77 9.5 7.9 6.1 8.4 9.2 10.3 11.0 11.6 12.1 1 0 0 0 35.8 s00000 994.7 16.0 0.0 1.0
30 6 W 5 5 01 5.5 4.6 94 9.5 2.9 2.0 7.0 7.7 9.0 10.0 11.0 12.0 4 2 3 0 8.5 s00000 964.9 4.0 0.0 0.7
31 7 NW 4 7 01 8.2 6.7 90 9.8 5.0 -0.9 7.7 8.0 9.0 9.8 10.8 11.8 1 2 4 0 2.6 004000 986.9 3.6 0.0 1.3
---------------------------------------------------------------------------------------------------------------------------
Mean
6 3 6 10.0 8.3 90 13.3 7.2 3.9 9.8 10.3 11.3 12.1 12.7 13.3 1005.0
Total 223.0 137.8 0.0 36.6
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1990-99 average used by the Climatological Observers Link. Rainfall was 193% of average
Air temperatures Weather (No. days occurrence) and 207% of 1961-90 ave.
Mean maximum 13.3 (-0.5) Sleet/snow falling 2 (+2.0) Most in a day: 35.8mm on 29th.
Mean minimum 7.2 (-0.5) Snow lying (at 09GMT) 0 ( 0.0) No. of days with:
Mean 10.3 (-0.5) Hail <5 mm 1 [-0.3] >=0.2 mm 29 (+10.6)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 [all hail] >=1.0 mm 23 (+ 7.7)
Mean grass min 3.9 (+1.2) Thunder heard 1 (+0.5) >=5.0 mm 16 (+ 8.7)
Lowest grass min -0.9 (-0.1) Gales 5 Lysimeter:
No. days <0.0C 3 (+0.4) Fog (at 09GMT) 0 PE 17.8 mm
PWB 205.2 mm
Highest maximum 18.8C on 3rd. Lowest minimum 2.9C on 30th. PWS 206.4 mm
Minimum relative humidity: 58% on 21st. PWD -1.2 mm
* Third wettest Oct on record. Wettest Jan-Oct (1079.8mm) since 1967; only 3 wetter years. Piche: 36.6 ml
Rain and wet days, and days >5mm most on this site since 1979.
---------------------------------------------------------------------------------------------------------------------------
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, 59 drizzle and rain, 60 intermittent sl. rain, 61 continuous sl. rain, 63 cont. moderate rain, 65 continuous
heavy rain, 80 slight rain shower.
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: 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 at 09GMT.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR NOVEMBER 2000
---------------------------------------------------------------------------------------------------------------------------
-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 6 7 02 6.8 4.3 84 9.6 5.0 2.0 6.5 7.3 8.5 9.5 10.6 11.6 1 2 4 0 8.7 006T00 986 3.8 0.0 0.7
02 8 SE 3 6 02 6.6 5.5 93 7.2 4.8 0.3 6.5 7.0 8.0 9.0 10.5 11.5 1 2 1 0 6.0 000000 979 6.5 0.0 0.2
03 4 NW 2 7 10 5.3 4.6 95 9.7 3.0 -1.9 5.2 6.2 7.8 8.5 9.8 11.3 1 1 4 0 3.1 000000 991 4.1 0.0 0.3
04 6 NW 2 5 10 5.8 5.6 98 11.0 4.0 -0.8 5.5 6.4 7.7 8.7 10.0 11.0 1 2 4 0 tr 004000 1004 0.0 0.0 0.7
05 7 SE 1 7 03 4.5 4.0 97 7.5 3.3 -1.4 5.2 6.2 7.5 8.5 9.8 10.9 1 1 4 0 30.4 000000 998 18.0 0.0 0.7
06 8 NE 8 5 63 6.5 5.8 95 9.0 4.6 3.3 7.0 7.3 8.0 8.3 9.2 10.5 2 3 3 0 10.6 0000G0 974 7.5 0.0 0.7
07 8 NE 4 5 80 8.7 7.9 94 9.2 6.2 5.4 8.0 8.0 8.1 8.5 9.0 10.2 1 3 3 0 3.2 000000 980 4.8 0.0 1.3
08 7 NE 4 7 05 8.4 4.6 77 8.8 6.7 5.5 7.2 7.6 8.0 8.8 9.3 10.1 1 1 0 0 24.4 004000 988 12.3 0.0 0.5
09 7 NW 2 5 80 7.0 5.9 93 7.6 6.5 4.2 7.5 7.7 8.1 8.8 9.3 10.1 1 2 3 0 15.0 000000 1001 9.0 0.0 0.2
10 7 SW 1 7 03 5.4 3.7 89 10.5 3.0 -1.8 6.0 6.6 7.8 8.3 9.2 10.1 1 2 4 0 11.6 000000 1010 9.6 0.0 0.7
11 7 SW 4 6 80 8.5 6.6 88 10.2 5.2 4.8 7.8 8.0 8.5 8.6 9.2 10.1 1 2 3 0 5.2 004000 999 4.4 0.0 1.5
12 7 SW 5 7 25 6.8 5.5 91 9.2 6.3 3.5 6.7 7.2 8.0 8.5 9.1 10.0 1 2 3 0 0.3 000000 987 0.8 0.0 1.0
13 7 W 2 5 25 6.5 5.6 94 7.6 4.4 -1.1 6.0 6.6 7.5 8.3 9.0 10.0 1 2 3 0 25.2 000000 992 11.2 0.0 0.1
14 7 N 1 7 21 5.8 5.6 98 8.7 3.5 -1.3 6.1 6.5 7.2 8.0 8.7 9.9 1 2 3 0 1.5 000000 999 1.8 0.0 0.8
15 7 SW 2 7 21 6.4 6.0 97 9.0 2.6 -3.1 6.0 6.2 7.0 7.8 8.6 9.8 1 2 3 0 10.0 000000 1006 8.0 0.0 0.5
16 6 NW 2 6 21 4.2 4.0 98 8.9 3.7 -1.0 5.0 6.0 7.2 7.8 8.5 9.5 1 2 3 0 2.1 004000 999 4.0 0.0 0.5
17 6 NW 2 6 80 5.0 3.8 92 8.4 3.4 -0.6 5.0 5.6 6.5 7.5 8.4 9.6 1 2 3 0 1.7 004000 1008 3.1 0.0 1.0
18 8 SW 4 5 61 8.4 8.2 99 10.3 3.1 -1.3 7.0 6.8 7.0 7.4 8.3 9.5 1 3 3 0 11.6 000000 1003 12.2 0.0 0.3
19 6 W 2 7 01 5.2 4.5 95 8.3 5.0 3.2 6.8 7.5 8.0 8.0 8.3 9.1 1 2 3 0 2.2 000000 995 2.0 0.0 0.3
20 6 NW 2 6 01 4.2 3.5 95 7.1 2.9 -1.6 4.8 5.6 7.0 7.6 8.3 9.2 1 2 4 0 5.2 s04000 992 6.0 0.0 0.3
21 6 SE 1 7 03 4.0 3.0 93 6.8 3.0 -1.5 4.4 5.2 6.5 7.1 8.0 9.3 1 2 4 0 7.7 004000 992 7.6 0.0 0.3
22 8 W 1 8 80 5.4 4.9 97 6.5 3.3 0.9 5.7 6.0 6.5 6.9 7.8 9.0 1 2 3 0 13.8 000000 982 10.5 0.0 0.3
23 8 NE 1 8 63 5.5 5.5 100 7.5 4.5 -0.1 5.8 5.8 6.3 6.8 7.6 9.0 2 3 3 0 1.4 000000 995 0.7 0.0 0.3
24 7 SW 1 7 02 5.3 4.6 95 9.1 2.7 -2.5 4.2 5.0 5.6 6.7 7.6 8.8 1 2 4 0 8.7 004000 1001 6.5 0.0 1.1
25 8 S 4 7 03 9.1 6.3 83 9.8 5.2 3.5 6.5 6.5 6.8 6.8 7.7 8.8 1 2 0 0 20.0 005TG0 987 9.7 0.0 1.5
26 7 W 5 7 01 7.2 4.7 84 8.4 4.9 2.9 6.2 6.5 7.0 7.1 7.6 8.7 1 2 3 0 tr 004000 987 0.0 0.0 0.9
27 6 SW 2 6 05 7.6 6.1 90 12.1 5.5 0.8 5.0 5.5 6.2 6.8 7.6 8.6 1 1 1 0 12.5 000000 1005 9.7 0.0 2.0
28 8 S 6 5 61 12.1 11.5 96 16.7 7.5 3.8 10.0 9.2 8.2 8.0 7.8 8.8 2 3 3 0 3.2 0000G0 998 4.0 0.0 2.5
29 7 S 8 5 80 12.3 8.7 79 12.5 11.1 9.6 9.9 9.6 9.0 8.8 8.4 8.8 1 2 3 0 0.2 0000G0 988 0.4 0.0 2.3
30 6 S 5 7 05 10.0 4.9 71 13.5 6.5 1.2 6.6 7.0 8.0 8.4 8.5 8.8 1 0 0 0 5.0 0000G0 1003 6.1 0.0 3.7
---------------------------------------------------------------------------------------------------------------------------
Mean
7 6.8 5.5 92 9.4 4.7 1.2 6.3 6.8 7.5 8.0 8.7 9.8 994
Total 250.5 184.3 0.0 27.2
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1990-99 average used by the Climatological Observers Link. Rainfall was 217% of average
Air temperatures Weather (No. days occurrence) and 203% of 1961-90 ave.
Mean maximum 9.4 (-1.0) Sleet/snow falling 1 (+0.7) Most in a day: 30.4mm on 5th
Mean minimum 4.7 (-0.4) Snow lying (at 09GMT) 0 (-0.1) No. of days with:
Mean 7.0 (-0.7) Hail <5 mm 9 [+7.9] >=0.2 mm 28 (+ 6.5)
No. days <0.0C 0 (+1.3) Hail >=5 mm 2 [all hail] >=1.0 mm 26 (+ 9.7)
Mean grass min 1.2 (-1.5) Thunder heard 2 (+1.2) >=5.0 mm 18 (+10.0)
Lowest grass min -3.1 (+0.2) Gales 5 Lysimeter:
No. days <0.0C 14 (+4.8) Fog (at 09GMT) 0 PE -4.6 mm
PWB 255.1 mm
Highest maximum 16.7C on 28th. Lowest minimum 2.6 on 15th. PWS 255.1 mm
Minimum relative humidity: 54% on 28th. PWD 0.0 mm
* Wettest November on record. Second wettest month on record since 1928, wettest Piche: 27.2 ml
Oct 1967 with 259mm. It was the 5th coldest November in records since 1979.
---------------------------------------------------------------------------------------------------------------------------
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,
21 rain in past hour, rain shower in past hr., 61 continuous slight rain, 63 cont. moderate rain, 80 sl. rain shower.
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: 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 at 09GMT.
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CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR DECEMBER 2000
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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 6 S 3 6 80 11.7 10.3 91 12.5 10.0 8.5 9.5 9.2 9.0 8.7 8.8 9.0 1 3 3 0 5.2 000000 999 4.8 0.0 2.0
02 7 SW 5 7 02 9.5 7.0 84 10.1 8.4 7.3 8.0 8.2 8.5 8.8 8.7 9.0 1 2 3 0 4.9 000000 999 2.0 0.0 1.0
03 1 SW 1 7 01 7.2 5.6 90 12.5 6.2 4.3 6.4 7.0 8.0 8.2 8.7 9.0 1 2 4 0 10.0 0040G0 1008 7.1 0.0 2.0
04 8 S 5 5 65 10.5 9.9 96 13.2 7.2 5.0 9.6 9.3 8.8 8.6 8.8 9.0 1 3 3 0 7.2 000000 990 4.2 0.0 1.7
05 8 S 5 5 63 11.3 10.7 93 11.9 9.9 9.2 10.2 10.0 9.2 8.9 8.9 9.1 2 3 3 0 11.2 0000G0 990 4.0 0.0 1.8
06 6 S 7 7 25 8.1 5.7 85 11.1 8.1 6.2 7.5 8.0 8.6 9.0 9.0 9.2 1 2 3 0 2.2 000000 993 1.5 0.0 1.6
07 7 S 2 7 05 8.8 6.2 84 10.5 7.9 6.4 7.0 7.7 8.2 8.6 9.0 9.2 1 1 1 0 19.7 000000 997 8.5 0.0 0.6
08 8 S 7 4 63 8.6 8.4 99 8.9 7.3 6.5 8.5 9.0 8.8 8.8 9.0 9.2 2 3 3 0 4.0 0000G0 976 3.2 0.0 1.4
09 7 SW 5 6 80 8.8 6.9 88 10.2 7.3 6.6 7.5 7.8 8.2 8.5 8.8 9.4 1 1 3 0 8.3 000000 993 3.8 0.0 1.2
10 7 SW 3 5 81 8.6 6.9 89 11.7 7.5 6.0 7.5 7.8 8.2 8.4 8.8 9.3 2 3 3 0 16.0 000tG0 992 9.4 0.0 0.8
11 8 SW 3 4 53 10.7 10.7 100 11.4 6.6 4.6 9.8 9.4 8.8 8.8 8.8 9.2 1 3 3 0 11.3 0000G0 1005 12.5 0.0 0.4
12 8 S 5 5 53 11.3 10.9 97 13.0 10.5 9.4 10.2 10.0 9.5 9.2 9.0 9.2 2 3 3 0 8.9 000000 1002 5.8 0.0 1.4
13 7 SW 5 5 02 8.5 6.3 96 9.0 6.5 4.4 7.5 8.0 8.8 9.1 9.3 9.2 1 1 3 0 6.2 0050G0 997 4.0 0.0 0.7
14 7 NW 1 7 01 4.1 3.9 98 6.5 3.0 0.2 5.2 6.2 7.2 8.3 8.9 9.5 1 2 3 0 4.7 004000 1002 3.5 0.0 0.4
15 6 NW 1 7 01 2.7 2.2 96 5.4 2.4 0.2 4.5 5.3 6.6 7.5 8.5 9.3 1 2 6 0 0.5 004000 1010 0.8 0.0 0.3
16 8 S 1 7 80 3.3 2.0 91 6.0 -0.5 -3.6 3.2 4.0 5.1 6.5 7.8 9.2 1 3 3 0 3.2 s04000 1012 2.6 3.5 0.1
17 6 S 1 7 03 2.5 2.5 100 7.3 2.0 -0.9 3.5 4.5 5.5 6.1 7.5 9.0 1 2 3 0 0.4 000000 1012 0.6 0.0 1.3
18 6 00 0 8 25 5.3 5.0 95 8.0 2.5 0.2 5.0 5.3 5.8 6.3 7.3 8.5 1 2 3 0 0.0 000000 1012 0.0 0.0 0.5
19 8 SE 1 7 05 6.0 4.9 92 11.8 2.2 -1.0 4.4 4.6 5.3 6.0 7.2 8.4 1 2 4 0 5.4 000000 1012 4.2 0.0 1.5
20 6 S 1 7 01 9.6 6.2 79 11.6 6.0 4.6 6.6 6.8 7.0 6.8 7.2 8.2 1 1 1 0 tr 000000 1008 0.0 0.0 0.9
21 3 00 0 3 04 6.3 3.7 83 9.3 5.4 1.1 4.1 5.2 6.2 6.8 7.3 8.2 1 1 1 0 0.0 000000 1014 0.0 0.0 0.3
22 0 00 0 7 04 3.1 2.6 96 11.2 2.1 -1.7 2.0 3.1 5.2 5.3 7.1 8.2 1 1 7 0 0.0 000000 1014 0.0 0.0 0.7
23 3 E 1 7 04 3.8 2.6 92 6.5 2.0 -1.2 1.5 2.6 4.1 5.2 6.5 8.2 1 1 7 0 tr 000000 1009 0.0 0.0 0.2
24 8 E 5 7 02 3.5 2.8 95 4.4 3.1 -0.2 4.4 5.0 5.0 5.3 6.5 8.0 1 1 3 0 1.0 000000 1003 2.1 0.0 0.7
25 5 E 5 7 01 2.3 -0.4 84 4.2 2.3 0.6 2.8 3.8 5.0 5.3 6.5 7.8 1 0 0 0 tr 002000 1005 0.0 0.0 0.8
26 7 E 2 7 02 2.0 -1.1 80 3.0 -0.5 -3.9 1.1 1.9 3.2 4.6 6.0 7.7 3 0 7 0 tr s03000 999 0.0 4.3 0.6
27 3 00 0 7 02 -1.2 -3.7 83 2.2 -1.8 -5.6 0.7 1.6 3.0 4.1 5.8 7.5 5 5 6 0 17.7 S04000 995 4.0 10.0 0.5
28 8 00 0 5 73 -2.0 -2.4 91 0.7 -3.7 -5.0 1.0 1.6 2.5 3.8 5.2 7.3 8 8 9 19 0.8 sL0000 992 1.1 23.3 0.5
29 6 N 1 7 02 0.0 -1.8 88 2.4 -4.7 -10.6 1.0 1.7 2.5 3.5 5.1 7.0 8 8 9 16 2.0 sL4000 1001 0.8 20.2 0.5
30 6 N 1 7 26 -0.3 -0.9 96 4.0 -3.0 -9.3 1.0 1.6 2.4 3.4 4.8 6.9 8 8 9 14 1.1 sL3t00 1008 1.6 11.3 0.5
31 8 SE 3 6 02 4.0 -1.9 66 9.3 -0.5 -6.6 1.1 1.6 2.5 3.3 4.8 6.7 7 7 9 11 1.7 sL40G0 1000 2.1 0.0 2.7
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Mean
6 5.8 4.2 90 8.4 3.9 1.3 5.2 5.7 6.3 6.8 7.6 8.5 1001
Total 153.6 94.2 72.6 29.6
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(.) Difference from 1990-99 average used by the Climatological Observers Link. Rainfall was 125% of average
Air temperatures Weather (No. days occurrence) and 136% of 1961-90 ave.
Mean maximum 8.4 (+0.5) Sleet/snow falling 7 (+4.7) Most in a day: 19.7mm on 7th.
Mean minimum 3.9 (+1.0) Snow lying (at 09GMT) 4 (+3.2) No. of days with:
Mean 6.2 (+0.8) Hail <5 mm 10 [+5.9] >=0.2 mm 24 (+ 4.1)
No. days <0.0C 7 (+1.5) Hail >=5 mm 1 [all hail] >=1.0 mm 21 (+ 5.3)
Mean grass min 1.3 (-1.5) Thunder heard 2 ( 0.0) >=5.0 mm 12 (+ 3.3)
Lowest gr. min -10.6 (-4.5) Gales 7 Lysimeter:
No. days <0.0C 12 (-1.9) Fog (at 09GMT) 0 PE -11.4 mm
PWB 165.0 mm
Highest maximum 13.2C on 4th. Lowest minimum -4.7 on 29th., PWS 165.0 mm
Minimum relative humidity: 65% on 22nd. PWD 0.0 mm
* Mean max 13.2C highest since 1996. Daily mean -1.5C on 28th 2nd lowest in Dec on record. Piche: 29.6 ml
Days with hail 11 (all types) equal highest in Dec with 1999.
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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,
25 rain shower in past hour, 26 snow shower in past hour, 53 continuous mod. drizzle, 63 cont. moderate rain,
65 continuous heavy rain, 73 cont. mod. snow, 80 slight rain shower, 81 hv. rain shower.
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 prisms, 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 at 09GMT.
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Monthly and annual summary statistics at Llansadwrn, Anglesey for 2000
(.) Difference from the 1990-99 average. Total rainfall 1483.9 mm
was 142% of average
Air temperatures Weather (No. days occurrence) Most in a day: 40.6 (Jan 11),
Mean maximum 13.1 (-0.3) Sleet/snow falling 17 (+4.8) 35.8 mm (Oct 29) and
Mean minimum 7.1 (+0.2) Snow lying (at 09GMT) 4 (+0.8) 32.2 mm (Sep 19).
Mean 10.1 (-0.1) Hail <5 mm 40 [+22.9] No. of days with:
No. days <0.0C 9 (-11.1) Hail >=5 mm 5 [all hail] >=0.2 mm 242 (+39)
Mean grass min 4.7 (-0.2) Thunder heard 12 (+4.4) >=1.0 mm 192 (+38)
Lowest gr. min -10.6 (-4.5) Gales 28 >=5.0 mm 107 (+36)
No. days <0.0C 49 (-16.4) Fog (at 09GMT) 2 No. dry days 84
Lysimeter:
Highest maximum 29.0 on Jun 18th. Lowest minimum -4.7 on Dec 29th. PE 248.6 mm
Minimum relative humidity: 43% on Apr 6th. PWB 1235.3 mm
* Wettest year in records since 1928. Equal lowest airfrosts 9 with 1998. PWS 1393.7 mm
* Frost-free from March 5 to December 15. Most thundery year (12 days) since 1983 (16 days). PWD -158.3 mm
* Most number of days with hail 45 (all types) on record since 1979. Piche: 449.9 ml
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Annual summaries for 2000 (No. days occurrence at 09 GMT).
Cloud cover Wind direction Wind speed Visibility Code Description
Cloud obscured 0 N 25 Calm 27 <100 m 0 Dense fog 0
8/8 cloud 114 NE 61 Force 1-3 249 100-190 m 1 Thick fog 0
6/8 to 7/8 164 E 11 Force 4-5 72 200-390 m 2 Fog 2
3/8 to 5/8 39 SE 14 Force 6-7 15 400-900 m 3 Mod. fog 2
1/8 to 2/8 39 S 71 Force 8-12 3 1.0-1.9 km 4 Very poor 17
Sky cloudless 10 SW 87 2.0-3.9 km 5 Poor 70
W 31 4.0-9.0 km 6 Moderate 60
NW 39 10 km or mo >=7 Good 215
Calm 27
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Comparison of annual values with recent years
-Air Temperature- Earth --------------Weather--------------
Year Max Min Mean Gmin 30cm Rain AF GF SF SL H T F
1991 13.1 6.2 9.7 4.5 10.2 832.2 35 75 9 4 12 3 1
1992 13.1 6.6 9.8 5.0 10.5 1209.7 21 64 0 0 15 11 2
1993 12.8 6.3 9.6 4.7 10.4 1001.0 18 60 9 1 20 5 8
1994 12.9 6.8 9.9 5.0 10.7 1185.8 15 61 10 3 11 7 1
1995 13.8 7.1 10.5 5.2 11.4 895.8 21 66 35 8 33 6 4
1996 12.8 6.2 9.5 3.9 10.4 793.7 40 90 22 7 29 8 2
1997 14.0 7.4 10.7 4.8 11.4 1008.3 17 80 7 5 19 8 1
1998 13.6 7.5 10.6 5.3 11.5 1215.5 9 60 7 0 36 9 2
1999 13.6 7.4 10.5 5.3 11.6 1286.1 13 51 10 2 37 11 3
2000 13.1 7.1 10.1 4.7 11.4 1483.9 9 49 17 4 45 12 2
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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)
Code 0 1 2 3 4 5 6 7 8 9
Jan 2 1 0 18 6 3 0 1 0 0
Feb 1 1 0 15 5 5 0 2 0 0
Mar 0 9 3 10 6 0 0 3 0 0
Apr 14 1 8 7 0 0 0 0 0 0
May 4 15 0 12 0
Jun 2 12 0 16 0 0
Jul 5 11 2 13 0 0
Aug 0 12 0 19
Sep 1 10 0 19
Oct 2 7 0 20 2
Nov 3 2 0 17 8 0 0 0
Dec 1 3 0 16 2 0 2 3 0 4
Yr 35 84 13 182 29 8 2 9 0 4
State of ground
Code 0 1 2 3 4 5 6 7 8 9
Jan 0 29 2 0 0 0 0 0
Feb 0 26 2 1 0 0 0 0
Mar 1 28 1 1
Apr 4 24 2 0 0 0 0
May 18 13
Jun 14 16
Jul 21 10
Aug 1 30 0
Sep 0 30 0
Oct 0 28 2 0 1
Nov 0 27 3 0
Dec 0 21 4 1 0 1 0 1 3
Yr 59 282 16 3 1 1 0 1 3 0
State of concrete
Code 0 1 2 3 4 5 6 7 8 9
Jan 8 5 11 7 0
Feb 6 4 12 6 1 0 0 0 0 0
Mar 16 2 11 1 0 1
Apr 14 1 8 7 0 0
May 25 1 3 2
Jun 22 3 1 4
Jul 23 3 3 2
Aug 19 1 7 4
Sep 13 4 11 2
Oct 9 0 16 6
Nov 1 4 20 5
Dec 2 8 8 8 0 1 0 1 3 0
Yr 158 36 111 54 1 2 0 1 3 0
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