Llansadwrn (Anglesey) Weather
Daily Observations 2004
at 0900 GMT
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Llansadwrn (Anglesey) Weather |
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CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JANUARY 2004
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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 4 6 05 6.5 5.4 92 7.4 2.1 0.5 4.8 4.6 4.5 4.6 5.3 7.3 2 2 3 0 tr 000000 1006 0.0 0.0 1.3
02 3 SE 1 7 01 2.7 0.6 86 6.6 1.6 -1.1 1.9 2.9 4.2 5.0 5.8 7.2 1 1 4 0 3.1 002000 1020 4.2 0.0 0.8
03 7 SW 3 7 03 4.7 3.5 92 6.3 1.8 -1.8 3.7 3.9 4.1 4.8 5.6 7.1 1 2 3 0 0.4 000000 1019 0.5 0.0 0.1
04 4 W 1 7 04 4.0 3.5 97 9.3 3.9 0.2 3.8 4.5 5.2 5.0 5.8 7.2 1 2 1 0 1.1 000000 1020 5.6 0.0 0.7
05 8 SW 4 6 50 9.3 9.3 100 10.1 4.0 0.5 7.5 7.0 6.1 6.0 6.1 7.2 1 3 3 0 15.7 000000 1013 10.8 0.0 0.0
06 6 W 2 7 03 6.1 5.4 95 10.1 6.1 4.0 6.5 7.1 7.2 6.8 6.8 7.1 2 2 3 0 0.1 000000 1010 0.0 0.0 1.0
07 5 S 6 7 05 10.1 6.0 76 11.0 4.2 0.5 7.1 7.0 6.8 6.6 6.8 7.5 1 1 0 0 4.2 000000 1005 6.3 0.0 2.8
08 8 SE 2 5 61 10.1 8.3 88 10.3 9.0 7.8 7.5 7.4 7.2 7.0 7.0 7.4 1 3 3 0 4.0 0000G0 975 3.0 0.0 0.6
09 7 W 4 7 80 4.9 3.9 94 9.3 4.8 2.8 5.2 5.7 6.1 6.6 7.1 7.6 1 3 3 0 1.0 000000 997 0.8 0.0 0.9
10 8 SW 3 6 10 9.3 9.1 97 10.7 4.0 -0.3 6.9 6.6 6.2 6.4 6.8 7.5 1 2 3 0 5.2 000000 1005 2.6 0.0 0.7
11 8 W 5 7 05 6.4 3.1 79 6.5 5.5 2.2 6.2 7.2 7.5 7.1 7.3 7.7 1 2 4 0 tr 004000 994 0.0 0.0 1.0
12 5 W 1 6 10 4.0 3.5 97 8.6 3.9 0.2 3.8 4.6 5.8 6.3 7.2 7.8 1 1 1 0 4.6 000000 991 0.9 0.0 1.2
13 8 W 5 7 02 6.3 3.7 83 7.5 4.0 1.6 5.5 5.7 6.0 6.3 6.8 7.6 1 2 3 0 0.6 004000 982 0.1 0.0 0.9
14 8 W 1 6 80 3.5 2.0 90 4.8 3.1 -0.5 3.6 4.3 5.2 5.9 6.8 7.8 1 2 3 0 1.9 004000 993 1.5 0.0 0.3
15 8 SW 3 7 03 4.5 2.3 85 8.3 1.9 -0.8 3.2 3.7 5.2 5.4 6.5 7.8 1 2 4 0 24.6 000000 1000 10.5 0.0 0.6
16 7 NW 3 7 80 4.7 4.0 95 7.2 4.1 2.6 4.8 5.0 5.5 5.9 6.3 7.7 2 3 4 0 0.5 004000 992 0.1 0.0 0.1
17 5 NE 2 7 01 2.5 1.2 91 5.3 1.3 -2.5 1.5 2.8 4.2 5.0 5.2 7.4 1 2 6 0 0.0 000000 1002 0.0 0.0 0.6
18 6 SW 1 7 03 1.0 0.5 96 8.1 0.1 -4.2 1.1 2.1 3.6 4.4 5.9 7.3 3 1 5 0 0.9 000000 1026 0.4 0.0 0.6
19 8 W 4 6 60 7.8 7.4 97 9.8 1.0 -0.3 5.9 5.5 5.2 5.1 5.8 7.1 1 3 3 0 3.0 000000 1019 2.8 0.0 0.4
20 8 W 2 5 63 8.6 8.6 100 8.8 7.8 7.4 7.3 7.0 6.5 6.1 6.2 7.2 2 3 3 0 6.3 000000 1018 6.0 0.0 0.0
21 8 00 0 7 02 6.0 5.5 97 8.5 6.0 5.3 6.3 6.5 6.6 6.5 6.5 7.2 1 2 3 0 0.6 000000 1021 0.7 0.0 1.1
22 8 S 4 7 60 8.5 7.4 93 10.1 6.0 5.3 7.2 6.9 6.8 6.7 6.8 7.2 1 2 3 0 0.2 000000 1009 0.0 0.0 0.5
23 8 S 2 7 04 8.6 7.5 93 9.2 7.9 4.8 7.6 7.5 7.2 7.1 7.0 7.3 1 2 1 0 7.8 000000 1010 6.1 0.0 0.2
24 3 W 1 7 10 3.6 3.4 98 8.7 2.7 -1.5 3.1 4.2 6.0 6.6 7.2 7.6 1 2 5 0 tr/fr 000000 1016 0.0 0.0 0.4
25 6 NW 1 7 10 1.8 1.5 98 4.6 1.1 -3.4 1.6 2.8 4.6 5.6 6.8 7.7 1 2 5 0 1.2 s00000 1014 0.6 0.0 0.2
26 6 NE 1 5 10 1.2 0.7 96 4.3 1.0 -1.8 1.1 2.1 3.7 4.8 6.2 7.5 3 6 5 0 0.2 003000 1007 0.0 0.0 1.0
27 7 NE 1 7 05 2.2 -0.3 84 4.3 0.9 -1.4 2.0 2.8 4.0 4.7 5.8 7.2 1 1 4 0 2.7 s03000 1013 3.5 0.0 1.1
28 6 NW 3 7 05 2.6 1.0 89 5.0 -0.4 -4.5 1.1 2.0 3.2 4.2 5.5 7.2 3 6 5 0 1.5 S03000 1008 1.2 7.2 1.5
29 1 NW 1 7 05 -1.4 -3.3 87 7.3 -2.1 -6.5 0.6 1.5 2.8 3.6 5.1 6.9 3 0 9 0 3.1 000000 1011 1.5 9.6 0.9
30 8 SW 4 5 61 5.5 5.0 97 10.1 -1.4 -4.8 3.2 3.2 3.2 3.7 5.0 6.6 1 3 3 0 27.6 000000 1002 15.0 0.0 0.8
31 8 SW 5 4 61 10.0 9.4 96 10.4 5.4 4.7 8.0 7.0 6.0 5.3 5.4 6.5 2 3 3 0 17.8 000000 980 11.3 0.0 0.0
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Mean
7 5.3 4.2 92 8.0 3.3 0.5 4.5 4.9 5.4 5.6 6.3 7.3 1006
Total 139.9 96.0 16.8 22.3
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(.) Differences from 1994-2003 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (134%) [143%] and
Mean maximum 8.0 (+0.1) [+0.6] Sleet/snow falling 3 (+0.9) 144% of 1928-2002 average.
Mean minimum 3.3 (+0.4) [+0.9] Snow lying (at 09GMT) 0 (-0.4) Most in a day: 27.6 mm on 30th
Mean 5.7 (+0.3) [+0.8] Hail <5 mm 8 {+4.5} No. days:
No. days <0.0C 3 (-2.4) Hail >=5 mm 0 {all types} 0.0 mm 1 (- 7.1)
Mean grass min 0.5 (-0.1) Thunder heard 0 (-0.6) >=0.2 mm 26 (+ 7.4)
Lowest grass min -6.5 (+0.3) Gales 1 >=1.0 mm 19 (+ 4.6)
No. days <0.0C 15 (+1.0) Fog (at 09GMT) 0 >=5.0 mm 7 (+ 0.8)
Mean soil 30cm 5.6 (+0.6)
Lysimeter:
Highest maximum 11.0C (-1.2) on 7th. Lowest minimum -2.1 (+0.5) on 29th. PE -1.9 mm
Minimum relative humidity: 62% on 29th. No. days at 30 cm >=5.6C 17; days <5.6C 14 PWB 141.8 mm
* Wettest January since 2000 that had 145.2 mm. Ranked 18th wettest since 1928. PWS 141.8 mm
* PWD 0.0 mm
*
* Piche: 22.0 ml
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Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); DD wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
WW present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
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CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR FEBRUARY 2004
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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 7 SW 4 5 10 7.7 7.1 96 10.5 4.8 3.3 5.5 5.8 6.1 6.1 6.0 6.5 1 2 3 0 20.3 000000 1005 7.2 0.0 1.0
02 8 S 7 4 10 10.5 10.3 99 12.0 7.7 5.2 8.3 7.8 7.0 6.6 6.2 6.6 2 2 3 0 33.4 0000G0 1008 13.2 0.0 0.8
03 8 SW 8 5 61 11.6 11.2 98 12.5 10.1 9.5 10.2 9.8 8.6 7.8 7.2 6.9 2 3 3 0 14.0 0000G0 1006 6.2 0.0 0.5
04 8 S 5 5 65 11.0 10.4 96 11.7 10.2 9.5 10.0 9.8 9.0 8.5 8.7 7.5 2 3 3 0 16.0 000000 1011 5.0 0.0 0.5
05 6 SW 5 5 10 10.1 8.9 92 11.4 10.0 9.0 9.3 9.3 9.1 8.8 8.2 7.5 1 2 0 0 tr 000000 1017 0.0 0.0 1.0
06 7 SW 4 6 10 7.7 6.8 94 10.0 7.4 5.6 7.5 8.0 8.5 8.5 8.2 7.8 1 1 3 0 8.8 000000 1010 3.7 0.0 0.6
07 6 W 2 7 05 4.9 3.0 87 7.2 3.5 0.3 5.2 6.0 7.1 7.8 8.0 8.0 1 2 1 0 5.4 004tG0 1014 2.3 0.0 1.0
08 6 NW 5 7 87 3.6 2.1 90 6.5 1.7 -0.1 3.5 4.3 5.8 6.8 7.6 8.0 1 2 6 0 0.6 004000 1023 0.8 0.0 1.2
09 8 00 0 7 05 2.4 0.0 84 7.5 -0.5 -5.0 3.0 3.5 5.2 5.9 7.0 8.0 1 0 4 0 1.3 000000 1035 1.5 2.0 0.7
10 8 W 4 6 10 7.5 6.6 94 9.0 2.3 1.5 6.0 5.8 5.8 6.2 6.6 7.8 1 2 3 0 tr 000000 1029 0.0 0.0 0.2
11 7 NE 2 6 10 8.4 7.6 94 11.2 7.0 3.3 6.6 6.5 6.6 6.8 7.0 7.7 1 2 1 0 0.0 000000 1029 0.0 0.0 0.5
12 8 SW 1 6 05 8.2 6.7 90 10.3 5.5 0.5 6.7 6.8 7.0 7.2 7.2 7.6 1 0 1 0 0.0 000000 1033 0.0 0.0 0.8
13 7 S 2 6 05 8.7 6.5 86 9.0 7.2 5.6 7.2 7.2 7.3 7.4 7.5 7.8 1 0 1 0 1.7 000000 1033 2.2 0.0 0.4
14 7 00 0 7 03 4.3 4.1 98 7.8 1.8 -2.8 4.4 4.9 6.2 7.0 7.3 7.9 1 2 4 0 tr/dw 000000 1030 0.0 0.0 0.3
15 3 00 0 6 04 3.5 3.0 97 11.4 2.0 -1.0 3.6 4.5 6.0 6.8 7.3 7.8 1 1 4 0 tr/fr 000000 1029 0.0 0.0 1.1
16 6 S 1 7 04 3.8 3.1 95 8.3 1.9 -2.0 3.0 3.5 5.2 6.1 7.0 7.8 1 0 4 0 2.2 000000 1031 3.0 0.0 0.4
17 6 NE 2 7 01 5.8 4.6 92 8.0 3.8 3.6 5.5 6.0 6.3 6.5 6.9 7.8 1 2 3 0 tr/fr 000000 1033 0.0 0.0 0.7
18 1 NE 1 7 04 2.2 1.4 95 8.1 0.4 -2.8 1.8 3.0 5.0 6.0 7.0 7.8 3 0 5 0 0.0 000000 1035 0.0 0.0 1.0
19 6 NE 2 7 05 5.4 3.2 86 8.1 2.0 -0.7 3.9 4.1 5.3 5.7 6.6 7.8 1 0 1 0 0.0 000000 1032 0.0 0.0 1.1
20 3 E 2 7 04 2.0 0.1 87 6.3 1.2 -1.2 1.8 2.8 4.5 5.4 6.6 7.6 1 0 5 0 0.0 000000 1028 0.0 0.0 1.4
21 0 E 4 5 06 1.0 -1.9 81 5.3 -0.7 -3.2 1.2 2.4 4.0 5.1 6.3 7.5 2 0 5 0 0.0 000000 1018 0.0 5.3 1.6
22 2 NE 4 7 02 4.5 0.0 73 5.4 1.0 -0.1 1.8 2.5 3.9 5.0 6.0 7.2 1 0 5 0 0.0 000000 1020 0.0 0.0 3.0
23 6 NE 2 8 02 2.5 -3.4 65 6.0 1.0 -0.5 1.3 1.8 3.3 4.5 5.6 7.2 0 0 0 0 1.3 000000 1027 2.4 0.0 1.2
24 8 NW 2 4 61 5.6 5.6 100 7.3 2.4 0.6 4.5 4.6 4.8 5.0 5.9 7.0 1 3 3 0 2.7 004000 1017 4.1 0.0 1.2
25 4 N 4 6 03 1.7 -4.5 63 5.2 1.0 -1.3 1.2 2.2 3.9 4.9 5.8 7.0 2 0 0 0 6.5 s0500 1015 4.5 0.0 1.0
26 8 00 0 2 75 -0.5 -0.8 98 2.2 -1.1 -4.5 1.0 1.8 3.0 4.3 5.6 6.8 9 9 9 4 7.7 S13000 1005 3.1 9.8 1.9
27 6 N 5 7 01 0.8 -4.2 69 3.5 -0.9 -2.2 1.2 2.0 3.0 3.8 5.0 6.9 7 7 9 13 0.6 s14000 1006 0.4 2.2 2.3
28 6 NE 3 7 01 0.7 -3.6 73 2.7 0.3 -1.3 1.1 1.5 2.7 3.6 5.0 6.5 6 6 9 7 tr s10000 1009 0.0 0.0 1.6
29 2 E 1 7 02 0.5 -2.5 80 5.2 -0.6 -3.2 1.0 1.4 2.7 3.5 4.9 6.4 5 5 9 4 0.0 010000 1022 0.0 8.5 1.0
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Mean
6 5.0 3.2 88 7.9 3.2 0.9 4.4 4.8 5.6 6.1 6.7 7.4 1021
Total 122.5 59.6 27.8 30.0
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(.) Differences from 1994-2003 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (124%) [164%] and
Mean maximum 7.9 (-0.6) [-0.6] Sleet/snow falling 4 (+0.6) 162% of 1928-2002 average.
Mean minimum 3.2 (+0.3) [+1.1] Snow lying (at 09GMT) 4 (+3.2) Most in a day:
Mean 5.6 (-0.2) [+0.3] Hail <5 mm 5 {+1.2} No. days:
No. days <0.0C 5 (+0.8) Hail >=5 mm 1 {all types} 0.0 mm 11 (+ 5.4)
Mean grass min 0.9 (+0.3) Thunder heard 1 (-0.5) >=0.2 mm 15 (- 3.9)
Lowest grass min -5.0 (+0.5) Gales 3 >=1.0 mm 13 (- 1.9)
No. days <0.0C 16 (+2.8) Fog (at 09GMT) 0 >=5.0 mm 8 (+ 0.9)
Mean soil 30cm 6.1 (+0.5)
Lysimeter: *
Highest maximum 12.5C (+0.2) on 3rd. Lowest minimum -1.1 (+0.3) on 26th. PE 2.8 mm
Minimum relative humidity: 62% on 23rd. No. days at 30 cm >=5.6C 19; days <5.6C 10 PWB 119.7 mm
* Most snow since 28 December 2000. With 123 mm was wettest Feb since 2002 and ranked PWS 121.9 mm
* 11th wettest on record since 1929. Jan and Feb combined was 262 mm and ranked 9th. PWD -2.2 mm
* Mean temperature 5.6C (rank 12th since 1979) was warmer than 2003 (5.4C) * Adjusted for snow melt.
* but cooler than 2002 (6.7C). Piche: 30.0 ml
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Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
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CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR MARCH 2004
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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 3 00 0 7 04 -0.3 -3.4 80 8.6 -1.8 -5.9 0.6 1.6 2.8 3.4 4.7 6.2 2 0 9 4 0.0 010000 1035 0.0 13.7 1.6
02 6 S 3 5 04 2.8 -0.2 81 7.1 -2.0 -5.5 0.7 1.6 2.8 3.4 4.8 6.2 2 0 9 0 tr 000000 1033 0.0 7.8 2.3
03 8 S 4 6 61 6.5 3.9 84 8.2 2.8 2.3 4.0 3.8 3.8 4.0 4.9 6.1 1 1 3 0 2.1 000000 1021 0.0 0.0 1.0
04 7 SW 1 7 01 7.4 6.8 96 12.6 5.8 4.9 6.2 5.8 5.3 5.1 5.1 6.0 1 2 3 0 tr 000000 1018 1.5 0.0 0.7
05 9 00 0 2 43 6.6 6.6 100 8.8 5.0 1.5 6.4 6.3 6.1 6.0 5.9 6.2 1 1 2 0 tr/fg 000001 1020 0.0 0.0 0.2
06 4 NW 1 5 10 3.5 3.0 97 10.7 2.2 -1.2 4.3 5.2 6.1 6.2 6.2 6.3 1 0 5 0 0.2 000000 1023 0.0 0.0 0.9
07 2 N 4 7 01 5.7 2.3 78 9.0 3.0 -0.5 5.0 5.5 6.0 6.2 6.5 6.8 1 2 4 0 tr/dw 000000 1025 0.0 0.0 1.4
08 1 E 1 7 04 3.8 0.1 77 10.2 0.7 -3.3 2.3 3.4 5.2 6.0 6.5 6.9 1 0 5 0 tr/fr 000000 1036 0.0 0.0 1.3
09 0 E 2 7 04 2.5 -0.2 82 8.8 -0.8 -5.1 1.7 2.8 4.8 5.6 6.5 7.0 3 0 7 0 0.0 000000 1036 0.0 3.2 1.2
10 7 E 1 7 04 2.2 -0.3 84 6.4 -1.2 -5.7 1.7 2.7 4.3 5.2 6.2 6.9 1 0 4 0 tr s03000 1032 0.0 9.1 1.1
11 7 SE 3 7 05 2.7 -3.5 63 5.6 -0.4 -4.3 2.8 3.2 4.2 5.1 6.0 7.0 1 0 0 0 0.3 s00000 1014 0.2 0.5 1.4
12 8 SE 2 7 02 4.0 -0.6 72 7.8 1.4 -0.7 3.4 3.4 4.0 4.9 5.6 6.8 1 0 0 0 1.0 s00000 1000 0.4 0.0 0.5
13 5 SW 3 7 10 6.0 5.1 94 10.6 2.8 -0.5 4.8 4.6 5.2 5.0 5.8 6.6 1 2 3 0 10.4 000000 1004 7.3 0.0 1.3
14 8 S 7 4 65 8.6 8.2 97 11.2 5.0 4.2 7.0 6.6 6.0 6.1 6.1 6.8 2 3 3 0 4.4 0000G0 999 2.2 0.0 0.8
15 8 S 6 5 10 9.0 7.7 92 11.0 7.0 4.4 7.6 7.2 6.8 6.8 6.5 6.8 1 0 0 0 12.2 000000 1014 7.2 0.0 0.3
16 8 SW 7 6 10 11.0 10.0 94 11.5 8.7 8.4 9.6 8.8 8.0 7.6 7.0 6.9 1 2 3 0 3.2 000000 1017 3.0 0.0 1.0
17 6 SW 3 7 10 8.1 7.7 97 12.5 6.9 5.0 8.0 8.0 8.0 7.9 7.5 7.1 1 2 3 0 0.0 000000 1022 0.0 0.0 1.2
18 7 S 5 7 01 8.2 5.5 83 10.5 6.0 4.5 7.6 7.4 7.7 8.0 7.8 7.5 1 0 1 0 13.8 000000 1015 6.7 0.0 1.1
19 7 W 6 7 01 6.6 4.8 88 10.0 5.7 3.0 8.0 7.8 7.5 7.8 7.8 7.8 1 2 3 0 4.6 0040G0 994 3.1 0.0 1.2
20 8 SW 8 5 51 10.0 10.0 100 12.8 6.3 4.3 9.0 8.5 8.2 8.1 7.8 7.7 2 3 3 0 tr 0000G0 993 0.0 0.0 1.3
21 6 W 5 7 01 6.8 4.0 82 10.6 5.4 2.7 6.5 6.8 7.5 8.1 8.1 7.9 1 0 0 0 0.4 004000 998 0.3 0.0 0.9
22 6 NW 3 7 01 5.5 3.8 89 10.4 4.0 -0.5 6.5 6.4 7.0 7.8 8.0 8.0 1 2 4 0 1.1 004000 1013 0.3 0.0 1.1
23 4 N 3 7 01 5.2 2.2 81 8.5 3.0 -0.2 6.0 6.2 7.1 7.8 8.1 8.0 1 2 3 0 0.0 000000 1019 0.0 0.0 1.6
24 6 N 4 7 02 5.8 1.8 76 8.6 3.1 1.0 5.7 5.9 6.9 7.8 8.0 8.1 1 0 1 0 1.2 000000 1029 1.9 0.0 1.4
25 7 NE 5 7 10 6.3 5.2 92 8.8 4.0 0.5 6.8 7.0 7.5 7.9 8.1 8.0 1 3 3 0 tr 000000 1021 0.0 0.0 1.2
26 8 N 1 7 04 6.1 3.0 80 8.0 2.5 -0.5 6.4 6.1 6.8 7.8 8.0 8.1 1 0 1 0 0.2 000000 1027 0.3 0.0 0.2
27 8 NW 1 7 02 7.5 6.0 90 9.1 5.0 4.8 7.6 7.5 7.7 8.0 8.1 8.1 1 0 1 0 0.0 000000 1018 0.0 0.0 0.7
28 8 S 3 7 05 8.7 5.9 82 14.3 6.2 5.0 8.2 7.7 7.8 8.2 8.2 8.2 1 0 1 0 0.0 000000 1016 0.0 0.0 1.4
29 7 S 1 8 02 9.3 6.1 80 12.2 5.8 3.4 8.8 8.3 8.1 8.6 8.4 8.2 1 0 1 0 0.0 000000 1022 0.0 0.0 1.6
30 6 E 1 5 04 9.8 4.9 72 17.6 4.5 1.0 7.6 7.0 8.0 8.6 8.6 8.5 0 0 1 0 0.0 000000 1018 0.0 0.0 2.0
31 1 E 4 5 06 7.8 4.9 82 19.1 4.5 1.5 7.5 7.2 8.2 9.0 8.9 8.5 0 0 1 0 0.0 000000 1006 0.0 0.0 2.5
------------------------------------------------------------------------------------------------------------------
Mean
6 6.2 3.9 85 10.4 3.6 0.9 5.8 5.8 6.3 6.7 7.0 7.3 1017
Total 55.1 34.4 34.3 36.4
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(.) Differences from 1994-2003 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (69%) [68%] and
Mean maximum 10.4 (+0.1) [+0.2] Sleet/snow falling 3 (+0.6) 78% of 1928-2002 average.
Mean minimum 3.6 (-0.3) [+0.3] Snow lying (at 09GMT) 1 (+0.6) Most in a day: 13.8 mm on 18th
Mean 7.0 (-0.1) [+0.3] Hail <5 mm 4 {+0.9} No. days:
No. days <0.0C 5 (+3.1) Hail >=5 mm 0 {all types} 0.0 mm 11 (+ 1.2)
Mean grass min 0.9 (-0.7) Thunder heard 0 (-0.3) >=0.2 mm 14 (- 2.3)
Lowest grass min -5.9 (-0.4) Gales 3 >=1.0 mm 10 (- 1.4)
No. days <0.0C 13 (+1.8) Fog (at 09GMT) 1 >=5.0 mm 3 (- 2.2)
Mean soil 30cm 6.7 (-0.4)
Lysimeter:
Highest maximum 19.1C (+3.7) on 31st. Lowest minimum -2.0 (-0.6) on 2nd. PE 13.0 mm
Minimum relative humidity: 44% on 30th. No. days at 30 cm >=5.6C 23; days <5.6C 8 PWB 42.1 mm
* Mean temperature coolest since 2001. Rainfall was most since 1999 that had 93.0 mm but ranks PWS 51.4 mm
* 34th lowest in records since 1928. Mean soil at 30 cm 6.7C lowest since 2001 (6.0C) and only PWD -9.3 mm
* 3rd lowest since 1990. Most days with hail since 1999.
* Piche: 36.4 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficet.
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 2004
---------------------------------------------------------------------------------------------------------------------------
-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 E 1 6 04 12.1 8.5 79 13.8 7.6 6.9 10.5 10.1 10.0 10.0 9.2 8.6 0 0 1 0 1.2 000000 1002 2.4 0.0 1.5
02 3 SE 3 8 01 11.1 4.2 62 14.6 5.4 2.3 8.8 8.5 9.4 9.9 9.5 8.8 1 1 3 0 1.8 000000 1003 3.5 0.0 3.2
03 8 S 5 5 80 8.9 8.3 96 10.3 7.8 5.1 9.0 9.2 9.4 9.8 9.4 8.9 1 3 3 0 4.1 000000 1010 6.0 0.0 0.9
04 6 SW 5 7 03 8.2 5.1 81 9.5 4.0 0.8 8.2 7.3 8.0 9.2 9.3 9.1 1 2 3 0 3.4 004000 1010 3.1 0.0 0.8
05 8 W 3 5 80 7.1 5.5 90 12.0 5.2 1.9 7.5 7.5 8.1 8.9 8.8 9.0 1 3 3 0 1.2 004000 1010 0.3 0.0 0.8
06 8 NW 3 5 60 6.1 4.0 86 9.9 3.6 -0.2 7.2 7.5 8.1 8.8 9.0 8.9 1 3 3 0 0.2 004000 1009 0.2 0.0 1.2
07 5 N 4 7 05 7.9 4.7 80 10.1 4.8 2.0 7.5 7.3 8.0 9.0 9.1 9.0 1 0 3 0 tr 000000 1016 0.0 0.0 1.2
08 8 NW 1 7 50 6.6 5.5 93 9.4 3.1 0.9 8.1 8.0 8.5 9.3 9.3 9.0 1 0 3 0 tr 000000 1022 0.0 0.0 1.0
09 8 S 2 7 02 7.6 3.6 76 8.8 3.8 1.7 8.5 8.3 8.8 9.3 9.3 9.2 1 0 1 0 2.9 000000 1020 3.9 0.0 0.1
10 7 SE 1 6 10 8.8 8.2 96 14.0 7.1 7.0 10.0 9.3 9.1 9.3 9.3 9.3 1 2 3 0 0.0 000000 1019 0.0 0.0 1.0
11 7 W 1 5 04 10.7 8.7 92 15.5 7.5 5.0 11.2 10.4 10.2 10.3 10.0 9.1 1 0 1 0 0.0 000000 1022 0.0 0.0 0.7
12 8 NW 1 4 10 9.8 9.2 96 13.0 7.6 5.6 11.1 10.7 10.8 10.9 10.2 9.5 1 0 1 0 tr 000002 1027 0.0 0.0 0.9
13 8 SW 1 7 05 9.1 7.2 88 13.5 6.0 2.2 10.3 10.0 10.4 10.8 10.8 9.8 1 0 1 0 0.4 000000 1027 0.4 0.0 1.1
14 8 SW 3 7 05 9.5 7.8 89 12.4 8.3 7.5 10.0 10.0 10.5 11.0 10.8 10.0 1 0 1 0 tr 000000 1017 0.0 0.0 2.8
15 8 S 5 6 80 8.8 6.0 82 8.8 8.1 7.0 8.8 9.0 9.8 10.3 10.6 10.0 1 0 0 0 7.6 000000 1010 5.0 0.0 0.9
16 5 00 0 7 01 7.3 4.3 81 12.1 4.0 1.0 7.8 7.8 7.8 10.0 10.2 10.0 1 1 1 0 0.0 000000 1012 0.0 0.0 1.6
17 2 SW 5 7 05 9.1 4.9 75 10.5 2.0 -0.2 7.5 7.6 9.0 10.1 10.3 10.0 1 0 1 0 11.4 000000 1002 10.2 0.0 1.3
18 7 00 0 6 01 6.5 6.3 98 11.1 4.5 3.9 8.5 8.3 8.9 9.8 10.0 10.0 1 2 3 0 4.3 004000 978 1.0 0.0 1.0
19 2 W 5 8 01 7.7 2.4 69 10.5 2.8 0.4 7.8 7.3 8.3 9.7 10.0 10.0 1 0 1 0 6.1 000000 987 3.7 0.0 2.0
20 6 S 4 7 03 8.8 5.7 81 12.5 5.3 3.6 7.4 8.0 8.8 9.6 10.0 10.0 1 2 4 0 0.5 004000 999 0.8 0.0 2.3
21 8 S 7 6 10 11.7 7.4 75 13.5 8.6 8.0 10.6 10.1 9.8 10.1 10.0 10.0 1 0 0 0 3.4 000000 997 3.5 0.0 1.8
22 6 SW 3 7 10 10.1 7.8 86 15.1 7.8 6.5 9.5 9.8 10.2 10.4 10.2 10.0 1 1 3 0 0.0 000000 1014 0.0 0.0 2.1
23 6 S 3 7 05 11.5 6.9 73 14.6 7.6 5.7 10.8 10.2 10.5 11.0 10.8 10.0 1 0 1 0 tr 000000 1023 0.0 0.0 1.2
24 4 S 2 7 05 13.8 11.4 85 19.8 9.5 6.3 12.3 11.0 11.0 11.2 10.8 10.0 1 0 1 0 0.0 000000 1027 0.0 0.0 1.3
25 1 00 0 7 04 12.1 87.0 10 17.9 6.6 3.6 12.7 11.3 11.9 12.2 11.5 10.2 0 0 1 0 0.0 000000 1027 0.0 0.0 1.2
26 0 S 1 7 04 13.3 7.4 67 18.9 8.3 4.4 12.7 12.2 12.5 12.7 12.0 10.5 0 0 1 0 0.0 000000 1021 0.0 0.0 1.7
27 7 NE 4 7 05 10.0 7.9 87 12.4 7.8 6.9 13.4 12.8 13.1 13.2 12.2 10.9 0 0 1 0 1.3 000000 1019 1.5 0.0 0.7
28 7 N 5 7 10 9.5 8.7 95 9.8 7.9 7.6 12.0 11.7 12.1 12.8 12.4 11.0 1 1 3 0 0.7 000000 1016 1.0 0.0 1.2
29 7 NE 5 7 04 7.0 2.9 75 11.5 6.6 5.3 9.3 9.8 10.8 11.8 12.0 11.2 1 0 3 0 0.0 000000 1010 0.0 0.0 1.5
30 6 NE 4 7 04 9.5 7.0 84 12.5 6.6 6.6 12.3 11.0 11.0 11.8 11.8 11.1 0 0 0 0 0.0 000000 1006 0.0 0.0 1.3
---------------------------------------------------------------------------------------------------------------------------
Mean
6 9.3 9.2 81 12.6 6.2 4.2 9.7 9.4 9.8 10.4 10.3 9.8 1012
Total 50.5 46.5 0.0 40.3
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1994-2003 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (68%) [87%] and
Mean maximum 12.6 (+0.1) [-0.2] Sleet/snow falling 0 (-2.1) 81% of 1928-2002 average.
Mean minimum 6.2 (+1.1) [+1.8] Snow lying (at 09GMT) 0 (-0.2) Most in a day: 11.4 mm on 17th
Mean 9.4 (+0.6) [+0.8] Hail <5 mm 5 {+1.4} No. days:
No. days <0.0C 0 (-0.7) Hail >=5 mm 0 {all types} 0.0 mm 10 (+ 0.2)
Mean grass min 4.2 (+1.3) Thunder heard 0 (- 0.10) >=0.2 mm 16 (- 0.3)
Lowest grass min 0.2 (+3.5) Gales 0 >=1.0 mm 12 (- 1.3)
No. days <0.0C 2 (-4.9) Fog (at 09GMT) 0 >=5.0 mm 3 (- 2.6)
Mean soil 30cm 10.4 (+0.6)
Lysimeter:
Highest maximum 19.8C (+2.0) on 24th. Lowest minimum 2.0 (+2.0) on 17th. PE 34.3 mm
Minimum relative humidity: 53% on 22nd. No. days at 30 cm >=5.6C 30; days <5.6C nil. PWB 16.2 mm
* Driest since 1997 (30.8 mm) and ranked 29th on record since 1928. PWS 30.7 mm
* Mean 9.4C cooler than 2003 lowest since 1997 (9.6C). Mean maximum 12.6C coolest since PWD -14.5 mm
* 2001 (11.0C) ranked 13th in records since 1979. Mean minimum 6.2C warmest since 1999 (6.1C) and
* WARMEST on record at this station. Mean soil at 30 cm 10.4C cooler than 2003 ranks 3rd. Piche: 40.3 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR MAY 2004
---------------------------------------------------------------------------------------------------------------------------
-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 NE 2 5 06 10.8 8.4 85 14.6 8.7 7.9 12.0 11.5 11.5 12.2 12.0 11.2 0 0 1 0 0.0 000000 1008 0.0 0.0 2.0
02 6 00 0 5 06 11.8 9.4 85 16.1 6.3 3.5 12.3 11.3 12.0 12.5 12.4 11.2 0 0 1 0 0.7 000000 1009 0.8 0.0 0.8
03 6 NW 1 7 04 9.3 6.1 80 14.8 6.6 5.3 12.0 11.8 12.5 13.0 12.3 11.4 0 0 3 0 20.7 000000 1004 5.6 0.0 1.7
04 7 W 4 7 03 8.3 5.7 83 11.1 6.5 5.5 10.0 11.0 11.8 12.6 12.5 11.5 1 2 3 0 5.0 004010 977 5.8 0.0 0.6
05 8 NW 2 7 02 7.8 7.4 97 12.2 3.5 0.6 10.6 10.3 11.0 12.1 12.3 11.6 1 2 3 0 7.1 000000 977 6.4 0.0 0.4
06 8 NW 1 5 80 7.7 7.5 99 13.2 6.3 4.6 10.5 10.7 11.2 12.1 12.1 11.5 1 3 3 0 0.2 000000 990 0.2 0.0 1.4
07 5 NW 2 7 05 11.5 8.7 83 15.0 5.1 1.3 10.8 9.7 10.5 12.0 12.2 11.8 1 0 1 0 0.6 000000 1004 1.4 0.0 0.6
08 8 N 1 7 60 8.7 8.1 96 9.8 7.0 5.4 11.4 11.5 12.0 12.0 12.3 11.6 1 3 3 0 5.7 000000 1007 10.5 0.0 0.1
09 8 N 1 4 51 9.8 9.6 99 13.3 8.7 8.4 11.3 11.2 11.5 12.2 12.2 11.5 1 3 3 0 tr 000000 1009 0.0 0.0 0.5
10 9 N 1 4 43 10.3 10.3 100 17.0 6.5 5.0 12.2 11.6 11.6 12.2 12.0 11.7 1 0 2 0 tr/df 000001 1015 0.0 0.0 0.6
11 9 00 0 2 44 9.5 9.5 100 12.0 8.0 5.3 12.0 12.0 12.3 12.6 12.4 11.5 1 0 2 0 0.1 000002 1021 0.0 0.0 0.4
12 8 00 0 4 61 10.4 10.4 100 12.7 9.2 9.3 7.8 7.9 12.5 12.8 12.5 11.8 1 3 3 0 tr 000000 1025 0.0 0.0 0.3
13 8 00 0 6 05 12.7 10.4 86 17.0 9.0 7.4 13.8 12.5 12.2 12.8 12.5 11.8 1 0 1 0 0.0 000000 1024 0.0 0.0 0.9
14 8 W 2 7 05 14.0 11.0 82 17.8 10.5 10.0 15.0 13.8 13.2 13.2 12.8 11.8 1 0 1 0 0.0 000000 1025 0.0 0.0 1.2
15 6 SW 2 6 04 15.0 12.3 84 18.5 11.2 9.1 16.2 14.8 14.0 13.8 13.2 12.0 0 0 1 0 0.0 000000 1031 0.0 0.0 1.4
16 1 S 1 7 04 17.0 10.9 67 22.3 8.7 5.6 16.2 13.3 13.4 14.1 13.5 12.0 0 0 1 0 0.0 000000 1032 0.0 0.0 2.3
17 8 W 1 5 04 13.8 11.4 84 19.2 9.6 6.0 15.0 14.2 14.5 14.8 14.0 12.2 0 0 1 0 0.0 000000 1027 0.0 0.0 1.6
18 3 SW 3 6 04 14.8 13.0 80 18.8 8.6 4.6 15.6 13.6 14.0 14.8 14.2 12.6 0 0 1 0 0.0 000000 1027 0.0 0.0 2.2
19 8 W 2 7 03 15.2 10.5 70 17.0 9.4 5.9 15.0 14.4 14.8 15.0 14.5 12.8 0 0 1 0 0.0 000000 1025 0.0 0.0 1.3
20 7 N 2 7 01 12.0 9.0 82 13.5 9.7 9.4 17.5 15.5 15.0 15.2 14.5 13.0 0 0 1 0 tr 000000 1024 0.0 0.0 2.1
21 6 N 3 7 01 9.8 5.4 74 12.2 6.6 4.0 14.5 13.7 14.4 15.0 15.0 13.2 0 0 1 0 0.0 000000 1025 0.0 0.0 1.5
22 6 NE 3 7 05 11.3 7.6 78 15.0 5.8 3.4 15.5 13.7 14.2 15.0 14.8 13.2 0 0 1 0 0.0 000000 1030 0.0 0.0 2.3
23 5 S 1 7 04 15.0 8.1 63 18.2 6.3 3.3 15.5 13.4 14.0 14.8 14.6 13.2 0 0 1 0 0.0 000000 1030 0.0 0.0 2.0
24 7 00 0 7 05 13.6 8.0 69 17.6 6.5 3.4 16.5 14.7 14.5 14.8 14.8 13.3 0 0 0 0 0.0 000000 1028 0.0 0.0 1.9
25 4 N 2 7 05 12.4 8.6 78 13.9 6.8 4.6 17.2 15.0 15.0 15.0 14.9 13.5 0 0 1 0 0.0 000000 1025 0.0 0.0 2.0
26 6 S 1 7 03 13.7 8.8 72 18.0 6.2 3.3 16.2 14.5 15.0 15.0 15.0 13.6 0 0 1 0 0.0 000000 1020 0.0 0.0 1.5
27 2 S 1 7 04 15.5 8.9 65 22.7 7.5 4.3 16.8 14.4 14.8 15.1 15.0 13.8 0 0 1 0 1.0 000000 1021 1.6 0.0 2.9
28 8 SE 2 6 10 13.5 12.6 94 18.1 13.0 11.0 16.2 16.4 16.7 16.0 15.2 15.8 1 3 3 0 2.2 000000 1020 2.4 0.0 1.6
29 7 S 3 6 01 12.5 11.2 92 18.7 12.5 9.9 15.5 15.4 15.7 15.7 15.3 14.0 1 2 3 0 0.0 000000 1018 0.0 0.0 2.1
30 5 S 3 7 01 14.4 9.8 74 18.1 9.3 5.8 16.8 15.0 15.2 15.8 15.3 14.0 0 0 1 0 0.0 000000 1019 0.0 0.0 1.8
31 5 SE 2 7 03 15.8 10.1 69 16.7 8.6 6.2 18.2 14.8 14.8 15.5 15.3 14.0 0 0 0 0 3.7 000000 1017 5.2 0.0 1.1
------------------------------------------------------------------------------------------------------------------
Mean
6 12.2 9.3 83 16.0 8.0 5.8 14.1 13.0 13.4 13.9 13.6 12.5 1017
Total 47.0 39.9 0.0 43.1
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1994-2003 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (71%) [82%] and
Mean maximum 16.0 (+0.4) [ 0.0] Sleet/snow falling 0 (-0.3) 72% of 1928-2003 average.
Mean minimum 8.0 (+0.2) [+1.0] Snow lying (at 09GMT) 0 (-0.1) Most in a day: 20.7 mm on 3rd
Mean 12.0 (+0.3) [+0.5] Hail <5 mm 1 {-0.5} No. days:
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 {all types} 0.0 mm 16 (+ 3.0)
Mean grass min 5.8 (-0.1) Thunder heard 0 (-0.7) >=0.2 mm 10 (- 4.1)
Lowest grass min 0.6 (+0.5) Gales 1 >=1.0 mm 7 (- 2.9)
No. days <0.0C 0 (-1.1) Fog (at 09GMT) 1 >=5.0 mm 4 (- 0.7)
Mean soil 30cm 13.9 (+0.6)
Lysimeter:
Highest maximum 22.7C (-0.7) on 27th. Lowest minimum 3.5 (+0.3) on 5th. PE 54.3 mm
Minimum relative humidity: 51% on 27th. No. days at 30 cm >=5.6C 31; days <5.6C nil. PWB -7.2 mm
* Driest May since 1998 (25.3 mm) ranking 25th since 1928, making the spring months PWS 31.0 mm
* Mar- May having 152.6 mm the driest since 1990 (80.2 mm), this ranking 16th. PWD -38.2 mm
* The mean of 12.0C was warmest since 2001 (12.4C); the mean soil at 30 cm of 13.9C warmest
* since 1990 (14.0C). The spell of 18 non-rain days (9-26th) was the most since 1980. Piche: 43.1 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JUNE 2004
---------------------------------------------------------------------------------------------------------------------------
-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 NE 3 6 02 12.9 11.6 92 17.2 11.4 11.0 16.5 15.9 15.9 15.8 15.2 14.0 1 2 3 0 0.0 000000 1015 0.0 0.0 1.6
02 6 N 1 7 02 13.4 8.9 74 15.6 7.5 5.0 15.8 14.1 14.3 15.4 15.2 14.0 0 0 1 0 0.0 000000 1028 0.0 0.0 2.0
03 8 SW 5 7 03 14.6 11.2 80 15.5 10.8 8.8 15.6 15.3 15.5 15.8 15.3 14.2 0 0 0 0 4.8 000001 1028 3.8 0.0 0.6
04 8 S 1 6 10 14.1 13.6 97 16.8 13.1 12.0 15.8 15.2 15.0 15.3 15.2 14.1 1 2 3 0 0.2 000000 1024 0.0 0.0 0.3
05 8 W 1 7 50 15.0 13.8 92 18.4 13.1 12.8 16.2 15.7 15.4 15.8 15.2 14.2 1 0 1 0 tr 000000 1022 0.0 0.0 0.8
06 7 S 3 7 03 17.2 14.4 89 18.5 11.7 8.8 17.5 15.5 15.0 15.8 15.3 14.0 0 0 1 0 0.0 000000 1019 0.0 0.0 0.9
07 2 S 4 8 01 17.7 14.4 81 20.3 12.4 11.3 19.0 16.3 15.8 16.2 15.5 14.2 0 0 1 0 tr 000000 1018 0.0 0.0 1.1
08 8 SW 3 5 10 15.4 14.5 95 18.0 13.9 13.0 18.0 17.4 17.0 16.8 15.9 14.2 0 0 2 0 0.7 000000 1015 1.2 0.0 1.5
09 6 SW 2 7 25 15.5 13.9 90 19.8 13.6 12.8 16.8 16.2 16.2 16.2 15.8 14.3 1 2 3 0 0.6 000000 1017 1.8 0.0 0.8
10 7 S 5 7 25 15.9 11.9 77 18.7 14.2 12.9 17.8 17.2 17.0 16.8 16.0 14.6 0 0 3 0 0.1 000000 1015 0.0 0.0 2.2
11 7 W 4 7 05 13.3 10.2 82 17.2 10.5 8.9 16.5 16.0 16.2 16.3 16.1 14.8 0 0 0 0 2.0 000000 1017 2.3 0.0 1.1
12 7 NW 3 7 01 14.5 12.1 86 18.6 10.8 8.9 17.0 15.7 15.8 16.2 16.0 14.8 1 1 3 0 0.0 000000 1023 0.0 0.0 1.7
13 2 S 4 8 01 18.6 12.2 66 22.8 9.5 6.3 18.5 15.3 15.2 16.2 16.0 14.8 0 0 0 0 0.0 000000 1032 0.0 0.0 2.2
14 5 W 3 7 05 17.4 13.7 79 23.6 14.1 12.4 19.9 17.8 17.6 17.1 16.1 14.8 0 0 1 0 0.0 000000 1032 0.0 0.0 2.4
15 8 W 2 5 10 14.8 13.7 96 18.0 12.0 10.0 17.5 17.7 18.1 17.4 16.8 15.0 0 0 1 0 0.1 000000 1027 0.0 0.0 0.7
16 8 W 4 5 05 17.3 15.1 87 21.6 13.0 12.8 19.0 17.7 17.1 17.0 16.5 15.1 0 0 0 0 0.0 000000 1021 0.0 0.0 2.4
17 8 NW 5 7 02 13.5 10.9 84 19.8 12.0 9.3 17.5 17.5 17.6 17.1 16.8 15.0 0 0 0 0 0.0 000000 1012 0.0 0.0 1.4
18 6 N 4 7 01 12.5 6.9 69 15.0 10.0 8.2 18.2 17.0 16.8 16.8 16.6 15.1 0 0 0 0 0.0 000000 1011 0.0 0.0 1.9
19 7 N 4 8 03 10.8 5.9 71 14.0 5.8 3.4 15.6 15.0 15.9 16.3 16.5 15.1 0 0 0 0 3.3 000000 1011 3.2 0.0 1.3
20 7 NW 1 6 80 10.6 9.0 90 16.8 6.4 4.2 14.3 14.1 15.0 15.8 16.1 15.2 1 3 3 0 0.5 000000 1007 0.7 0.0 1.2
21 7 W 1 7 80 13.0 9.5 79 15.7 8.3 5.6 17.2 15.3 15.1 16.0 16.0 15.0 1 3 3 0 5.5 000000 1008 1.8 0.0 1.1
22 3 S 1 8 15.7 7.8 59 18.7 6.7 3.8 16.0 18.0 18.7 15.2 15.6 15.0 1 0 1 0 6.4 000000 1009 6.5 0.0 1.6
23 8 N 1 5 80 15.0 13.8 92 17.0 11.3 9.6 17.0 15.8 15.7 15.8 15.6 14.9 1 3 3 0 7.5 000000 986 6.6 0.0 0.4
24 7 NW 6 7 01 11.2 8.8 85 13.7 9.6 8.9 13.5 13.5 14.2 15.2 15.5 14.9 1 1 3 0 1.8 000000 1005 0.6 0.0 0.8
25 6 NW 3 7 01 13.7 10.3 80 18.0 6.7 4.0 15.2 13.1 13.5 15.0 15.2 14.9 1 0 1 0 0.9 000000 1017 1.6 0.0 2.2
26 8 S 4 5 61 13.5 10.2 81 17.5 9.4 6.4 14.0 14.3 15.0 15.5 15.4 14.8 1 3 3 0 1.0 000000 1010 1.7 0.0 1.5
27 5 SW 6 7 05 16.5 11.6 73 18.7 13.3 11.5 17.2 15.3 15.0 15.5 15.4 14.8 1 0 0 0 0.2 000000 1014 0.2 0.0 1.7
28 6 SW 3 7 05 13.4 9.7 78 18.3 8.0 4.5 13.8 14.0 15.0 15.8 15.7 14.8 0 0 1 0 3.8 000000 1023 1.4 0.0 1.8
29 8 S 5 5 10 13.7 13.0 95 17.1 11.5 9.8 15.5 15.5 15.8 15.8 15.8 14.8 1 0 3 0 9.4 000000 1022 5.2 0.0 1.2
30 8 S 5 4 10 13.5 13.5 100 18.4 12.9 12.2 15.0 15.0 15.2 15.8 15.8 14.8 1 3 3 0 3.5 000000 1008 1.2 0.0 0.7
------------------------------------------------------------------------------------------------------------------
Mean
7 14.5 11.5 83 18.0 10.8 9.0 16.6 15.7 15.9 16.1 15.8 14.7 1017
Total 52.3 39.8 0.0 41.1
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1994-2003 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (71%) [79%] and
Mean maximum 18.0 (+0.9) [+0.3] Sleet/snow falling 0 ( 0.0) 73% of 1928-2002 average.
Mean minimum 10.8 (+0.8) [+1.3] Snow lying (at 09GMT) 0 ( 0.0) Most in a day: 9.4 mm on 29th.
Mean 14.4 (+0.9) [+0.8] Hail <5 mm 0 {-0.6} No. days:
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 {all types} 0.0 mm 9 (- 2.2)
Mean grass min 9.0 (+0.6) Thunder heard 0 (-0.3) >=0.2 mm 17 (+ 2.0)
Lowest grass min 3.4 (+0.4) Gales 0 >=1.0 mm 11 (+ 0.6)
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 0 >=5.0 mm 4 (- 0.7)
Mean soil 30cm 16.1 (+0.5)
Lysimeter:
Highest maximum 23.6C (-1.4) on 14th. Lowest minimum 5.8 (+0.1) on 19th. PE 69.0 mm
Minimum relative humidity: 52% on 22nd. No. days at 30 cm >=5.6C 30; days <5.6C nil. PWB -16.7 mm
* Driest since 2001 and ranks 27th driest since before 1929. The mean temperature of 14.4C PWS 25.8 mm
* cooler than 2003 but warmest since 1993. The mean minimum of 10.8C ranked 3rd warmest PWD -42.5 mm
* since before 1979 being only cooler than 1982 and 2003.
* Piche: 41.1 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JULY 2004
---------------------------------------------------------------------------------------------------------------------------
-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 4 7 25 12.5 10.8 89 16.4 9.3 7.1 14.7 14.3 14.8 15.7 15.8 14.8 1 2 3 0 0.3 000000 1008 0.3 0.0 1.8
02 8 SW 5 6 80 12.9 11.4 91 17.0 11.0 9.9 14.7 14.5 15.0 15.8 15.7 14.8 1 3 3 0 1.9 000000 1005 4.2 0.0 1.6
03 7 W 5 7 10 14.4 11.8 84 18.1 11.0 10.0 15.6 14.6 15.0 15.8 15.5 14.9 1 0 3 0 1.4 000000 1009 0.3 0.0 1.3
04 7 NW 4 7 02 15.0 11.7 81 17.8 11.2 7.1 17.5 15.5 15.2 16.2 15.6 14.8 1 1 3 0 0.3 000000 1012 0.2 0.0 1.1
05 5 N 1 8 01 14.5 10.3 76 20.0 8.1 5.2 18.0 15.5 15.1 16.1 15.8 14.9 1 1 3 0 0.0 000000 1021 0.0 0.0 2.0
06 6 SW 2 7 05 17.0 12.3 74 17.6 10.1 6.3 18.3 16.0 16.0 16.7 16.2 15.0 0 0 1 0 3.3 000t00 1022 4.1 0.0 1.4
07 7 NE 2 7 21 15.4 12.3 82 17.4 11.3 10.5 16.9 16.0 16.2 16.8 16.2 15.0 1 2 3 0 tr 000000 1017 0.0 0.0 3.0
08 7 NE 6 7 80 12.4 8.6 78 13.5 11.7 11.1 14.0 14.5 15.5 16.5 16.4 15.1 0 0 0 0 6.6 000000 1012 1.2 0.0 1.6
09 7 N 2 7 01 12.7 8.5 76 18.0 9.7 7.5 14.7 13.9 14.1 15.6 15.9 15.0 1 0 3 0 tr 000000 1014 0.0 0.0 1.6
10 6 NW 1 7 03 15.0 10.3 73 16.1 10.6 8.3 16.5 15.0 15.3 16.3 16.0 15.0 1 0 1 0 0.3 000000 1014 0.3 0.0 0.7
11 8 N 1 7 05 13.1 11.6 91 16.6 10.2 7.8 15.0 14.8 15.2 16.1 16.0 15.0 1 0 3 0 0.6 000000 1014 0.4 0.0 0.6
12 8 NW 2 7 02 13.9 12.3 90 16.3 10.4 8.0 15.9 15.0 15.2 16.0 16.0 15.0 1 1 3 0 0.0 000000 1017 0.0 0.0 1.5
13 6 S 1 7 03 15.0 9.8 71 20.8 9.0 5.8 16.0 14.5 15.0 16.1 15.8 15.0 0 0 1 0 13.7 000000 1017 5.3 0.0 2.0
14 8 SW 3 6 10 15.1 15.1 100 17.0 13.5 13.0 17.0 16.5 16.5 16.5 16.2 15.0 1 2 3 0 3.9 000000 1014 6.1 0.0 0.4
15 8 00 0 5 52 14.5 14.1 98 15.6 13.6 13.8 16.8 16.3 16.3 16.6 16.2 15.1 1 3 3 0 11.0 000001 1014 5.6 0.0 0.1
16 7 W 1 7 01 14.8 12.8 88 17.7 13.5 11.0 17.8 16.6 16.2 16.4 16.2 15.1 1 1 3 0 18.3 000000 1013 8.7 0.0 1.4
17 8 00 0 6 10 12.6 12.4 99 18.7 10.9 10.5 15.8 15.7 15.2 17.0 16.5 15.2 1 3 3 0 0.3 000000 1009 0.0 0.0 0.9
18 5 SW 2 8 02 15.1 10.2 72 20.2 10.2 6.8 16.5 15.0 15.8 16.8 15.5 15.2 1 0 1 0 0.0 000000 1014 0.0 0.0 2.2
19 5 S 4 8 03 16.7 11.4 71 19.4 11.4 9.0 17.5 15.6 16.2 17.2 16.6 15.3 1 0 1 0 9.2 000000 1015 5.8 0.0 1.3
20 6 S 4 7 05 17.4 13.9 80 21.0 12.8 12.2 17.3 16.1 16.3 16.9 16.6 16.5 1 1 3 0 2.0 000000 1010 3.1 0.0 1.6
21 6 S 5 7 02 15.9 13.6 86 20.2 14.1 13.2 17.2 16.8 17.0 17.2 16.8 15.5 1 0 3 0 0.0 000000 1011 0.0 0.0 2.3
22 8 SW 2 6 02 16.2 14.1 87 16.4 13.5 11.7 17.3 17.0 17.0 17.8 17.0 15.6 1 0 1 0 2.5 000000 1015 2.9 0.0 0.7
23 5 SW 5 7 05 16.4 13.0 80 20.6 12.8 11.1 17.4 16.0 16.2 17.2 16.8 16.0 1 0 1 0 0.0 000000 1020 0.0 0.0 1.8
24 8 SW 4 7 02 13.8 11.8 88 15.8 10.6 7.6 15.7 15.8 16.8 17.5 17.2 15.8 1 0 1 0 3.9 000000 1026 2.2 0.0 1.2
25 8 SW 4 5 63 12.5 12.1 98 15.7 12.0 10.2 14.4 15.0 16.0 16.9 16.9 15.8 1 3 3 0 2.4 000000 1020 6.0 0.0 0.3
26 7 NW 1 7 01 15.7 14.5 92 17.2 12.4 12.2 17.2 16.2 16.0 16.5 16.5 15.7 1 1 3 0 0.3 000000 1019 0.3 0.0 0.4
27 8 NE 1 4 10 15.2 14.7 97 18.5 14.2 14.0 17.2 16.7 16.7 17.0 16.8 15.8 1 2 3 0 tr 000002 1020 0.0 0.0 0.4
28 8 00 0 4 10 16.3 16.0 98 20.5 14.5 14.0 17.5 17.0 17.0 17.2 16.8 15.8 1 0 3 0 tr 000002 1018 0.0 0.0 1.1
29 8 S 1 7 06 19.3 15.1 77 21.4 14.1 11.5 19.2 17.8 17.2 17.4 16.8 15.8 1 0 1 0 tr 000000 1013 0.0 0.0 1.3
30 6 NW 1 7 06 16.2 13.4 83 17.8 13.7 13.4 18.8 17.7 17.4 17.7 17.2 15.8 1 0 1 0 0.0 000000 1021 0.0 0.0 1.6
31 3 NE 1 7 04 16.2 10.8 70 20.5 11.2 8.2 18.2 16.8 17.0 17.7 17.2 15.9 0 0 1 0 0.0 000000 1022 0.0 0.0 3.1
------------------------------------------------------------------------------------------------------------------
Mean
7 15.0 12.3 85 18.1 11.7 9.9 16.7 15.8 15.9 16.7 16.3 15.3 1015
Total 82.2 57.0 0.0 42.3
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1994-2003 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (147) [129] but
Mean maximum 18.1 (-1.3) [-1.4] Sleet/snow falling 0 ( 0.0) 110% of 1928-2003 average.
Mean minimum 11.7 (-0.5) [ 0.0] Snow lying (at 09GMT) 0 ( 0.0) Most in a day: 18.3 mm on 16th
Mean 14.9 (-0.9) [-0.7] Hail <5 mm 1 {+1.0} No. days:
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 {all types} 0.0 mm 7 (- 0.6)
Mean grass min 9.9 (-0.6) Thunder heard 1 (+0.1) >=0.2 mm 19 (+ 4.9)
Lowest grass min 5.2 (-0.4) Gales 0 >=1.0 mm 13 (+ 3.0)
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 0 >=5.0 mm 5 (+ 1.0)
Mean soil 30cm 16.7 (-0.8)
Lysimeter:
Highest maximum 21.4C (-4.6) on 29th Lowest minimum 8.1 (-0.1) on 5th. PE 53.3 mm
Minimum relative humidity: 51% on 5th. No. days at 30 cm >=5.6C 31; days <5.6C nil. PWB 28.9 mm
* It was the wettest July since 1992 and ranked 27th since before 1928. PWS 52.5 mm
* The mean temperature was lowest since 2002 (14.7C) ranking 9th since before 1979. PWD -23.5 mm
* The soil temperature at 30 cm was equal lowest since 1996.
* Piche: 42.3 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR AUGUST 2004
---------------------------------------------------------------------------------------------------------------------------
-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 NE 1 7 04 20.5 13.8 65 26.4 11.8 7.9 19.0 17.1 17.3 18.0 17.5 16.0 0 0 1 0 0.2 000000 1021 0.2 0.0 2.1
02 7 SE 2 7 04 20.2 17.3 83 27.7 17.4 14.1 20.1 19.7 19.4 18.8 17.8 16.0 0 1 3 0 1.4 000t00 1014 0.8 0.0 1.3
03 8 S 1 7 04 18.2 17.7 95 19.1 16.5 15.5 19.0 19.0 19.2 19.0 18.2 16.2 1 0 3 0 19.0 000000 1012 7.6 0.0 0.3
04 9 NE 1 2 42 15.4 15.4 100 17.4 14.2 14.2 17.7 17.7 18.0 18.3 17.8 16.2 1 2 2 0 0.7 000002 1013 0.3 0.0 0.1
05 9 00 0 4 42 17.2 17.2 100 23.4 12.9 12.9 18.6 17.6 17.5 18.0 17.8 16.5 1 1 2 0 0.4 000001 1013 0.3 0.0 0.7
06 6 SW 4 7 01 17.6 15.6 88 22.2 14.0 12.7 18.6 18.2 18.2 18.5 17.8 16.5 1 1 3 0 0.0 000000 1014 0.0 0.0 1.2
07 1 SE 1 7 01 17.3 12.3 72 24.5 13.2 11.5 17.8 17.8 18.2 18.6 18.1 16.5 1 0 1 0 0.0 000000 1014 0.0 0.0 2.2
08 6 S 5 7 03 24.5 15.9 59 24.7 16.7 12.8 19.9 18.7 19.0 19.1 18.2 16.6 0 0 1 0 7.9 000000 1000 5.4 0.0 1.8
09 8 00 0 7 61 15.6 15.4 99 22.6 15.0 14.8 17.8 17.8 18.2 18.5 18.0 16.7 1 3 3 0 0.2 000000 1004 0.0 0.0 0.8
10 8 NE 1 6 10 16.3 15.8 97 23.8 15.3 14.7 18.0 18.0 18.2 18.7 18.2 16.8 1 0 1 0 tr 000000 1007 0.0 0.0 1.2
11 6 E 2 7 05 18.9 14.6 76 24.1 14.0 10.8 18.8 17.8 18.2 18.8 18.2 17.8 0 0 1 0 6.3 000t00 1008 2.2 0.0 0.8
12 3 SE 1 7 01 17.5 15.5 88 22.7 14.5 12.1 18.3 17.9 18.2 18.9 18.3 16.8 1 2 3 0 4.7 000t00 1001 0.4 0.0 0.8
13 8 00 0 7 10 17.4 16.4 94 19.8 13.2 10.5 18.7 18.0 18.2 18.8 18.3 17.0 1 1 3 0 0.2 000000 1006 0.0 0.0 0.6
14 2 SE 1 7 04 17.0 16.2 95 23.1 14.0 12.4 18.0 18.0 18.8 18.9 18.4 16.9 1 0 1 0 0.3 000000 1016 0.1 0.0 1.3
15 2 S 4 7 01 18.7 15.5 82 21.0 15.3 13.0 18.9 18.3 18.8 18.9 18.5 17.0 1 1 3 0 15.4 000000 1015 3.1 0.0 1.2
16 7 SW 5 7 02 16.5 15.1 92 20.3 14.7 13.8 18.0 17.7 18.2 18.6 18.3 17.0 1 2 3 0 4.4 000000 1004 1.8 0.0 1.2
17 4 S 4 7 01 17.4 15.5 89 21.6 12.9 10.2 18.5 17.5 18.8 18.5 18.2 17.1 1 1 3 0 9.2 000000 998 4.6 0.0 1.5
18 7 S 6 7 01 15.0 14.7 98 19.8 14.4 13.7 16.8 17.3 18.2 18.8 18.2 17.0 1 2 3 0 7.3 000t00 991 3.0 0.0 0.8
19 8 SW 6 6 10 15.5 14.3 92 18.5 14.2 13.2 17.0 17.0 17.8 18.4 18.2 17.1 1 1 3 0 11.3 000000 994 7.2 0.0 0.7
20 8 N 4 4 60 13.4 13.2 99 13.5 13.3 13.3 15.9 16.4 17.0 17.8 18.0 17.1 1 3 3 0 9.6 000000 1002 3.8 0.0 0.7
21 6 NW 2 7 03 13.5 12.0 91 18.2 7.7 5.4 14.4 13.5 14.9 16.8 17.5 17.0 1 1 1 0 tr 000000 1017 0.0 0.0 1.2
22 8 00 0 7 02 14.7 10.3 75 18.6 9.6 7.5 16.0 15.3 16.0 16.9 17.2 16.9 1 0 1 0 20.3 000000 1017 8.4 0.0 0.8
23 7 E 1 7 01 13.8 13.6 99 20.2 13.0 12.3 15.6 15.8 16.5 17.1 17.2 16.8 1 3 3 0 4.0 000000 1005 4.0 0.0 0.9
24 7 W 2 6 10 15.7 15.4 98 18.4 13.7 11.6 17.2 16.9 17.0 17.3 17.2 16.5 1 3 3 0 1.0 000000 1003 0.8 0.0 0.4
25 8 NW 1 6 02 14.5 14.3 99 18.7 13.2 11.8 16.4 16.4 17.0 17.3 17.3 16.5 1 3 3 0 tr 000000 1007 0.0 0.0 0.6
26 8 W 2 5 50 15.0 13.8 92 18.7 13.0 10.9 16.6 16.5 17.0 17.5 17.3 16.5 1 0 1 0 12.9 000000 1019 4.1 0.0 1.2
27 6 W 2 7 10 14.3 13.0 92 19.4 13.8 13.5 17.2 16.8 17.0 17.5 17.4 16.5 1 2 3 0 0.0 000000 1008 0.0 0.0 0.6
28 7 SW 2 7 01 13.0 10.9 87 17.2 10.0 7.7 16.0 16.2 17.0 17.5 17.5 16.5 1 0 1 0 0.9 000000 1012 1.8 0.0 1.6
29 8 SW 6 5 80 13.6 12.1 92 18.5 12.1 10.8 15.2 15.6 16.5 17.3 17.4 16.5 1 1 3 0 1.0 000000 1006 0.6 0.0 1.3
30 7 NW 4 6 10 14.0 11.2 83 17.5 12.2 10.0 16.3 15.8 16.2 17.2 17.2 16.5 1 1 3 0 tr 000000 1014 0.0 0.0 1.0
31 6 NW 3 7 03 13.5 10.5 82 18.3 8.3 4.8 14.4 14.0 15.7 17.0 17.2 16.5 1 0 1 0 0.0 000000 1020 0.0 0.0 1.2
------------------------------------------------------------------------------------------------------------------
Mean
6 16.3 14.3 89 20.6 13.4 11.6 17.4 17.1 17.6 18.1 17.8 16.7 1009
Total 138.6 60.5 0.0 32.1
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1994-2003 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (199%) [172%] and
Mean maximum 20.6 (+0.8) [+1.3] Sleet/snow falling 0 ( 0.0) 155% of 1928-2003 average.
Mean minimum 13.4 (+0.9) [+2.0] Snow lying (at 09GMT) 0 ( 0.0) Most in a day: 20.3 on 22nd.
Mean 17.0 (+0.9) [+1.7] Hail <5 mm 0 {-0.4} No. days:
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 {all types} 0.0 mm 5 (- 7.9)
Mean grass min 11.6 (+0.3) Thunder heard 4 (+2.4) >=0.2 mm 23 (+ 9.2)
Lowest grass min 4.8 (-0.8) Gales 0 >=1.0 mm 16 (+ 5.6)
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 2 >=5.0 mm 10 (+ 5.0)
Mean soil 30cm 18.1 (+0.4)
Lysimeter:
Highest maximum 27.7C (+1.3) on 2nd. Lowest minimum 7.7 (-0.9) on 21st. PE 48.6 mm
Minimum relative humidity: 56% on 2nd. No. days at 30 cm >=5.6C 31; days <5.6C nil. PWB 90.0 mm
* Wettest Aug since 1992 (149.2 mm) and wetter than 2000 (132.4 mm) the wettest year on record. PWS 103.7 mm
* The mean 17.0C was =2003 and highest since 1997 and was +1.7C when based on the 1971-2000 ave. PWD -13.7 mm
* The mean max of 20.6C was cooler than 2003 (20.8C) ranking 8th since before 1979. The mean min
* of 13.4C warmest since 1997 (14.0C) ranks 7th and +2.0 when based on the 30-y average. Piche: 32.1 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR SEPTEMBER 2004
---------------------------------------------------------------------------------------------------------------------------
-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 S 3 7 01 15.5 11.4 77 20.0 9.3 5.5 14.5 14.0 15.6 16.7 17.0 16.5 1 0 1 0 0.0 000000 1016 0.0 0.0 1.2
02 7 S 2 7 05 15.6 12.7 83 18.3 11.3 7.8 15.6 15.3 16.0 16.7 16.8 16.5 1 0 1 0 tr 000000 1015 0.0 0.0 1.3
03 7 S 5 7 01 15.4 11.9 80 18.0 12.2 9.7 15.4 15.2 16.0 16.7 16.8 16.2 0 0 1 0 0.4 000000 1019 0.3 0.0 1.1
04 8 S 3 4 53 16.1 15.9 99 19.5 15.0 14.8 16.5 16.5 16.6 16.8 16.8 16.3 1 2 3 0 0.1 000000 1025 0.0 0.0 1.5
05 8 N 1 6 42 16.0 15.3 96 21.4 14.3 11.3 17.3 16.6 16.5 16.8 16.8 16.2 1 0 2 0 tr 000001 1028 0.0 0.0 0.6
06 4 NE 3 5 42 16.8 16.5 98 21.8 14.5 12.9 18.2 17.7 17.5 17.5 17.0 16.3 0 1 2 0 0.0 000002 1029 0.0 0.0 0.7
07 0 E 5 7 04 14.6 11.6 82 19.5 12.7 11.4 16.5 16.2 17.5 17.8 17.5 16.4 0 0 1 0 0.0 000000 1034 0.0 0.0 3.6
08 0 SE 2 7 04 16.5 9.4 63 24.6 12.2 9.8 15.2 15.0 16.2 17.2 17.5 16.5 0 0 1 0 0.0 000000 1033 0.0 0.0 2.6
09 0 N 1 7 02 17.8 11.6 67 24.5 10.1 7.0 15.3 14.9 16.2 17.2 17.5 16.6 0 0 1 0 2.0 000000 1025 1.0 0.0 1.4
10 7 00 0 4 62 15.9 15.9 100 17.0 14.0 10.8 16.4 16.5 17.1 17.3 17.2 16.4 1 2 3 0 15.0 000000 1010 7.5 0.0 0.8
11 8 SW 6 6 02 14.6 11.4 81 15.5 13.2 12.2 15.0 15.4 16.3 17.0 17.1 16.4 1 1 1 0 24.4 000000 1006 8.0 0.0 0.7
12 7 SW 6 6 03 13.5 10.2 81 15.0 9.0 7.5 13.2 13.2 14.4 16.0 16.8 16.4 1 1 1 0 30.0 0000G0 1010 12.7 0.0 0.8
13 2 NW 5 7 01 12.5 7.8 73 14.0 9.9 8.4 13.0 13.2 14.4 15.7 16.2 16.2 1 1 1 0 8.3 0000G0 997 2.2 0.0 2.3
14 8 N 3 5 02 11.5 10.1 91 15.0 10.0 8.5 12.7 12.8 13.8 15.0 15.9 16.0 1 1 1 0 0.8 000000 1019 0.3 0.0 0.8
15 5 NW 2 6 02 12.1 9.8 86 18.0 7.4 5.0 12.0 12.0 13.3 14.9 15.7 15.9 1 1 1 0 0.0 000000 1019 0.0 0.0 1.4
16 7 S 6 5 50 14.2 12.4 89 15.2 8.8 5.9 13.5 13.5 14.0 15.0 15.3 15.8 1 1 1 0 12.5 0000G0 1017 8.8 0.0 0.8
17 6 SW 4 6 03 13.8 12.9 94 17.9 12.0 11.2 14.0 13.9 14.4 15.0 15.3 15.5 1 1 1 0 22.0 000000 1013 7.4 0.0 1.5
18 6 NW 4 6 01 13.5 13.1 98 16.2 12.4 12.0 14.0 14.2 14.6 15.2 15.5 15.4 1 2 3 0 0.2 000000 1004 0.1 0.0 1.0
19 4 SW 5 6 02 12.5 10.0 85 15.1 9.6 6.7 12.5 12.6 13.8 15.0 15.5 15.4 1 1 1 0 15.9 0000G0 1014 5.5 0.0 1.3
20 8 W 5 6 80 12.7 10.8 88 14.8 12.2 11.2 13.9 13.9 14.2 14.9 15.2 15.2 1 1 3 0 0.9 0000G0 1003 0.2 0.0 1.4
21 6 NW 4 6 03 12.1 7.4 73 13.5 9.7 7.4 11.6 12.0 13.4 14.7 15.0 15.2 1 1 0 0 5.4 000000 1018 4.0 0.0 1.4
22 8 W 5 5 63 13.6 13.4 99 16.0 10.8 7.2 13.4 13.3 13.6 14.3 15.0 15.1 1 2 3 0 8.5 000000 1016 7.3 0.0 0.1
23 6 N 3 5 21 12.1 11.7 98 14.9 13.6 11.9 14.5 14.6 14.6 15.0 15.0 15.1 1 2 3 0 tr 000000 1014 0.0 0.0 1.5
24 2 NE 3 8 02 11.1 5.7 69 15.1 8.8 5.9 10.9 10.7 13.3 14.7 15.0 15.0 1 0 0 0 0.8 000000 1023 1.3 0.0 1.1
25 8 W 4 4 55 13.0 12.6 98 16.2 8.1 4.9 12.9 13.0 13.6 14.4 15.0 15.0 1 2 3 0 0.3 000000 1022 0.2 0.0 0.9
26 8 W 3 5 10 13.5 13.2 97 15.8 12.8 11.2 14.4 14.4 14.5 14.9 15.0 15.0 1 2 1 0 3.3 000000 1023 6.6 0.0 0.7
27 8 00 0 5 53 14.9 14.6 98 15.8 13.4 13.5 15.0 15.0 15.0 15.0 15.0 14.9 1 2 3 0 0.4 000000 1022 0.5 0.0 0.2
28 8 SW 3 4 61 14.0 13.5 97 14.5 14.0 11.2 14.4 14.5 14.8 15.1 15.1 15.0 1 2 3 0 1.7 000000 1017 3.2 0.0 0.3
29 8 SE 2 6 51 12.7 12.3 98 15.8 9.9 5.0 13.6 13.5 14.0 14.8 15.0 14.9 1 2 3 0 12.9 000000 1016 7.1 0.0 0.3
30 6 W 2 6 01 13.8 13.4 98 15.9 12.4 12.2 14.4 14.3 14.4 15.0 15.0 14.9 1 2 3 0 tr 000000 1015 0.0 0.0 0.6
------------------------------------------------------------------------------------------------------------------
Mean
6 14.1 11.9 88 17.2 11.5 9.3 14.3 14.3 15.0 15.7 16.0 15.7 1017
Total 165.8 84.2 0.0 33.9
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1994-2003 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (166%) [180%] and
Mean maximum 17.2 (-0.2) [+0.2] Sleet/snow falling 0 ( 0.0) 165% of 1928-2003 average.
Mean minimum 11.5 (+0.9) [+1.8] Snow lying (at 09GMT) 0 ( 0.0) Most in a day: 30.0 mm on 12th
Mean 14.4 (+0.4) [+1.0] Hail <5 mm 0 {-0.7} No. days:
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 {all types} 0.0 mm 5 (- 4.8)
Mean grass min 9.3 (+1.0) Thunder heard 0 (-0.8) >=0.2 mm 20 (- 4.1)
Lowest grass min 4.9 (+2.0) on 25th. Gales 5 >=1.0 mm 13 (+ 0.1)
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 0 >=5.0 mm 10 (+ 2.9)
Mean soil 30cm 15.7 (+0.2)
Lysimeter:
Highest maximum 24.6C (+1.5) on 8th. Lowest minimum 7.4 (+1.0) on 15th. PE 29.6 mm
Minimum relative humidity: 42% on 8th. No. days at 30 cm >=5.6C 30; days <5.6C nil. PWB 135.7 mm
* More rain (165.8 mm) than 2003 (159.7 mm) and wettest since 1999 (174.3 mm). Even wetter... PWS 146.8 mm
* than 2000 (138.6 mm), the wettest year, and ranks 9th since before 1928. PWD -11.1 mm
* Mean min 11.5C ranks 2nd warmest since before 1979 but mran max (17.2C) was coolest since 2001 (16.1C).
* The mean 14.4C was lowest since 2002 (14.5C). Piche: 33.9 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 SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR OCTOBER 2004
---------------------------------------------------------------------------------------------------------------------------
-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 S 5 7 01 12.3 10.5 88 13.8 8.2 4.0 12.5 12.8 13.6 14.7 15.0 15.0 1 1 1 0 4.6 000000 1013 2.1 0.0 1.0
02 7 SW 6 5 01 12.3 10.2 87 15.0 9.2 4.9 11.5 11.8 12.9 14.1 14.8 14.9 1 1 1 0 tr 000000 1008 0.0 0.0 1.0
03 5 S 4 6 02 11.6 8.8 83 15.6 9.0 4.3 10.9 11.2 12.3 13.8 14.3 14.9 1 1 1 0 25.1 000000 1010 11.2 0.0 0.9
04 3 W 5 7 01 9.0 8.0 93 13.5 8.1 6.6 11.3 12.3 13.2 13.8 14.2 14.3 1 2 3 0 15.4 000000 1001 7.6 0.0 1.9
05 6 SW 6 7 05 11.9 8.3 78 14.7 8.9 8.0 11.2 11.5 12.5 13.2 14.0 14.4 1 2 3 0 5.7 000000 1000 3.5 0.0 1.0
06 7 W 5 7 25 9.4 8.4 93 13.6 7.7 6.2 10.5 10.8 12.0 13.0 13.8 14.2 1 2 3 0 1.7 000000 1007 1.8 0.0 0.8
07 6 NW 1 7 01 10.0 9.6 97 15.9 7.3 4.1 10.0 10.5 11.8 12.7 13.5 14.0 1 2 3 0 0.1 000000 1015 0.0 0.0 0.5
08 1 E 2 7 04 9.5 8.5 93 14.5 5.6 1.9 8.5 9.6 11.4 12.6 13.2 13.8 1 2 1 0 0.0 000000 1021 0.0 0.0 1.0
09 5 E 4 7 04 8.7 7.2 90 13.2 6.7 4.0 8.4 9.3 11.0 12.3 13.2 13.8 1 0 1 0 0.0 000000 1023 0.0 0.0 1.5
10 7 E 4 7 04 9.3 7.0 85 14.5 8.3 6.7 10.5 10.7 11.5 12.0 13.0 13.8 1 0 0 0 0.0 000000 1019 0.0 0.0 1.4
11 6 E 5 7 04 9.0 6.2 83 14.7 7.5 4.5 8.7 9.4 11.0 11.8 12.9 13.8 1 0 1 0 0.0 000000 1017 0.0 0.0 1.2
12 2 E 2 5 06 10.2 7.7 85 14.0 7.3 3.9 10.0 10.0 11.1 11.8 12.5 13.5 1 0 1 0 tr 000000 1012 0.0 0.0 0.9
13 7 S 3 6 80 11.2 8.8 85 14.0 6.8 2.5 10.0 10.4 11.3 12.0 12.6 13.2 1 2 3 0 0.5 000000 999 0.4 0.0 0.7
14 5 SW 2 7 05 8.1 6.8 92 11.2 5.6 0.6 8.1 9.0 10.5 11.5 12.5 13.7 1 0 1 0 17.2 000000 995 9.6 0.0 0.1
15 7 N 2 5 25 8.2 8.0 99 11.3 6.5 2.8 9.5 9.8 10.4 11.3 12.2 13.1 1 2 3 0 11.7 000000 994 0.4 0.0 0.5
16 6 NE 5 7 03 10.0 7.3 83 12.1 7.5 4.4 9.3 9.5 10.3 11.1 12.2 12.9 1 2 4 0 0.1 005T00 996 0.0 0.0 1.6
17 7 N 3 7 05 10.0 7.3 83 13.0 8.0 7.0 9.8 10.0 10.5 11.2 12.1 12.9 1 0 3 0 4.0 000000 1004 3.2 0.0 0.6
18 2 W 2 7 10 7.5 7.3 99 11.6 5.7 3.0 8.3 9.3 10.3 10.2 11.8 12.8 1 2 3 0 4.5 000000 1008 12.4 0.0 0.9
19 6 S 6 7 05 9.5 6.3 80 12.3 6.7 3.5 8.5 9.1 10.1 11.0 11.8 12.8 1 2 3 0 18.6 000000 997 18.3 0.0 0.6
20 8 E 1 6 61 8.1 7.7 97 10.3 5.8 5.5 9.0 9.1 10.0 10.7 11.5 12.5 1 3 3 0 18.4 000000 992 7.8 0.0 0.2
21 7 SW 6 7 21 8.0 6.9 93 12.5 5.3 3.8 8.0 8.5 9.7 10.5 11.5 12.5 2 2 4 0 10.5 004TG0 992 5.3 0.0 1.5
22 8 SE 1 5 65 9.1 8.7 97 13.5 8.0 8.0 9.2 9.3 9.8 10.3 11.2 12.1 2 3 3 0 86.0 000T00 998 20.0 0.0 0.3
23 8 00 0 4 61 10.4 10.4 100 13.2 8.9 8.1 11.0 11.0 11.0 11.0 11.2 11.8 2 3 3 0 11.1 000000 999 10.3 0.0 0.4
24 3 S 6 5 01 12.7 9.8 82 14.5 9.8 10.0 11.0 11.2 11.2 11.2 11.3 11.8 1 2 3 0 3.4 000t00 995 8.0 0.0 1.4
25 8 W 4 5 60 9.1 8.9 99 11.0 9.1 8.1 10.2 10.5 11.0 11.2 11.5 11.7 1 3 3 0 0.3 000000 996 0.9 0.0 0.6
26 6 W 1 7 01 7.7 7.1 96 12.9 4.2 1.2 7.7 8.5 9.6 10.7 11.5 10.8 1 1 1 0 1.1 000000 1010 0.6 0.0 1.1
27 8 SE 5 6 02 9.8 6.8 82 13.3 6.7 3.7 7.8 8.3 9.2 10.2 11.2 11.8 1 1 1 0 1.9 000000 996 2.2 0.0 1.6
28 2 SE 4 7 01 11.5 7.4 76 16.7 9.5 7.7 9.3 9.5 10.0 10.1 11.0 11.8 1 2 3 0 3.0 000000 985 4.2 0.0 1.3
29 7 SE 1 7 10 10.3 9.7 96 16.0 9.4 7.5 10.0 10.0 10.2 10.5 11.1 11.6 1 3 3 0 1.2 000000 987 1.0 0.0 0.4
30 2 SE 2 5 10 10.3 9.9 97 14.6 9.9 7.2 9.9 10.2 10.7 10.8 11.0 11.5 1 2 3 0 tr 000000 1007 0.0 0.0 0.4
31 8 E 1 2 42 9.6 9.6 100 12.5 6.4 3.5 9.4 9.5 10.1 10.7 11.3 11.6 1 3 2 0 0.1 000001 1022 0.0 0.0 0.4
------------------------------------------------------------------------------------------------------------------
Mean
6 = 71 % 9.8 8.2 90 13.5 7.5 5.1 9.7 10.1 11.0 11.7 12.4 13.0 1004
Total 246.2 130.8 0.0 27.7
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1994-2003 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (212%) [219%] and
Mean maximum 13.5 (-0.8) [-0.3] Sleet/snow falling 0 (-0.3) 208% of 1928-2003 average.
Mean minimum 7.5 (-0.7) [+0.2] Snow lying (at 09GMT) 0 ( 0.0) Most in a day: 86.0 mm on 22nd
Mean 10.5 (-0.8) [-0.1] Hail <5 mm 1 {+0.2} No. days:
No. days <0.0C 0 ( 0.0) Hail >=5 mm 1 {all types} 0.0 mm 4 (- 4.3)
Mean grass min 5.1 (-0.5) Thunder heard 4 (+3.5) >=0.2 mm 21 (+ 1.1)
Lowest grass min 0.6 (+0.8) Gales 1 >=1.0 mm 19 (+ 2.7)
No. days <0.0C 0 (-2.2) Fog (at 09GMT) 1 >=5.0 mm 10 (+ 2.3)
Mean soil 30cm 11.0 (-0.6)
Lysimeter:
Highest maximum 16.7C (-3.1) on 28th. Lowest minimum 4.2 (+0.9) on 26th. PE 26.7 mm
Minimum relative humidity: 59% on 28th. No. days at 30 cm >=5.6C 31; days <5.6C nil. PWB 219.5 mm
* Wettest Oct with 246 mm since 1967 (258 mm) ranking 3rd ANY month since 1928. PWS 223.3 mm
* The fall of 86 mm on 22nd was the largest of ANY day at this station but lower than the PWD -2.8 mm
* Llansadwrn record of 137 mm on 10 August 1957 in a thunderstorm. The mean temperature was
* equal warmest since 2002. Piche: 27.7 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR NOVEMBER 2004
---------------------------------------------------------------------------------------------------------------------------
-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 1 7 05 9.7 7.6 87 11.1 9.0 7.8 10.0 10.2 10.8 10.8 11.2 11.6 1 1 1 0 0.0 000000 1025 0.0 0.0 0.6
02 5 E 3 7 05 8.7 7.9 94 11.5 5.7 2.5 8.6 8.2 10.0 10.5 11.2 11.7 1 0 1 0 tr 000000 1020 0.0 0.0 0.7
03 8 S 3 6 05 10.7 9.3 91 12.8 7.2 3.5 9.3 9.5 10.0 10.4 11.0 11.8 1 1 3 0 3.8 000000 1012 2.6 0.0 0.5
04 1 W 2 6 10 7.0 6.3 96 12.9 5.5 1.2 7.5 8.6 10.0 10.3 11.0 11.5 1 2 3 0 0.0 000000 1019 0.0 0.0 0.8
05 7 SW 1 7 05 8.2 6.2 87 11.2 6.8 2.2 8.2 8.6 9.5 10.0 10.9 11.5 1 1 1 0 7.4 000000 1031 8.3 0.0 0.6
06 8 W 1 5 61 10.4 10.4 100 11.7 7.9 4.0 10.0 10.0 10.0 10.1 10.8 11.2 1 3 3 0 5.6 000000 1029 9.8 0.0 0.0
07 8 NW 1 7 02 9.8 9.4 97 11.0 9.5 9.0 10.2 10.4 10.5 10.4 11.0 11.3 1 2 3 0 3.1 000000 1028 10.5 0.0 0.2
08 8 N 1 5 61 10.0 10.0 100 11.6 9.5 9.0 10.3 10.5 10.8 10.8 11.0 11.2 1 3 3 0 1.3 000000 1022 1.2 0.0 0.3
09 8 NW 1 7 10 9.3 9.1 99 11.2 6.7 2.2 9.8 10.0 10.2 10.8 11.0 11.5 1 2 3 0 3.4 000000 1017 2.1 0.0 1.0
10 4 N 5 7 01 8.7 5.6 81 10.5 5.8 2.1 8.0 8.7 9.8 10.2 10.8 11.3 1 0 0 0 0.4 000000 1020 1.5 0.0 1.5
11 9 W 1 2 51 9.1 9.1 100 11.6 6.4 3.9 8.5 8.8 9.2 9.9 10.3 11.3 1 3 3 0 3.3 000002 1023 5.2 0.0 0.1
12 8 NW 3 5 60 11.2 11.0 99 11.5 9.0 7.9 10.3 10.2 10.1 10.0 10.6 11.2 1 3 3 0 1.6 000000 1021 0.5 0.0 2.1
13 6 N 3 8 01 7.0 0.1 61 9.5 4.5 2.5 5.7 6.7 8.5 9.5 10.5 11.1 1 0 0 0 3.6 000000 1038 2.6 0.0 0.5
14 7 N 1 8 02 6.1 5.0 92 8.3 3.4 0.4 7.1 7.5 8.2 9.1 10.0 11.0 1 2 3 0 0.2 000000 1037 0.2 0.0 0.5
15 8 W 4 7 60 8.3 7.7 96 10.6 6.0 6.0 8.2 8.4 8.8 9.2 10.0 11.0 1 3 3 0 1.0 000000 1028 1.2 0.0 0.2
16 7 W 2 6 10 10.6 10.2 97 12.3 8.3 7.9 9.5 9.5 9.5 9.6 10.0 10.8 1 2 3 0 3.4 000000 1026 6.2 0.0 0.4
17 8 SW 4 5 61 11.0 10.6 97 11.5 10.5 10.1 10.5 10.3 10.1 10.0 10.3 10.8 1 3 3 0 7.7 000000 1020 9.5 0.0 0.3
18 8 NW 1 5 61 5.7 5.5 98 6.1 5.5 5.1 8.2 9.0 9.8 10.0 10.5 11.0 1 3 3 0 19.1 s00000 1016 11.6 0.0 0.0
19 6 N 1 6 26 2.0 1.5 96 6.2 1.1 -1.2 5.0 6.0 7.7 8.9 10.0 10.9 1 2 4 0 0.5 s03000 1022 0.2 0.0 0.2
20 8 NW 1 7 26 2.8 2.0 95 9.8 1.0 -1.4 5.0 5.5 7.0 8.1 9.5 10.8 1 3 4 0 2.9 s00000 1024 5.1 0.0 0.5
21 8 SW 5 6 10 9.8 9.2 96 11.3 2.8 2.4 7.7 7.5 7.7 8.2 9.0 10.5 1 2 3 0 5.2 000000 1018 6.2 0.0 0.1
22 7 W 3 7 10 10.5 8.9 90 12.0 9.8 9.0 9.4 9.3 9.1 9.0 9.2 10.2 1 2 3 0 tr 000000 1015 0.0 0.0 0.4
23 6 SW 1 5 10 8.8 8.2 96 10.6 8.4 4.8 8.8 8.0 8.3 9.4 9.5 10.2 1 2 1 0 0.0 000000 1027 0.0 0.0 0.5
24 8 S 1 7 05 10.5 8.9 90 11.1 8.6 6.2 9.5 9.5 9.5 9.5 9.5 10.2 1 0 1 0 0.8 000000 1027 0.6 0.0 0.8
25 7 S 3 7 80 10.0 7.5 84 11.2 8.5 5.5 9.0 9.2 9.4 9.8 10.0 10.3 1 3 3 0 7.8 000000 1022 4.5 0.0 1.0
26 8 NW 1 7 50 9.0 8.6 97 9.6 9.0 8.5 9.8 9.8 9.8 10.0 10.0 10.2 1 3 3 0 tr 000000 1019 0.0 0.0 0.2
27 7 SW 2 8 02 5.5 3.8 89 9.3 4.5 0.8 6.5 7.5 8.8 9.3 10.1 10.2 1 0 1 0 9.8 004000 1022 4.0 0.0 0.6
28 5 N 4 8 01 6.7 3.1 78 7.3 3.5 -0.4 6.4 7.0 8.0 8.8 9.8 10.2 1 1 4 0 0.0 000000 1017 0.0 0.0 1.8
29 6 SW 1 8 03 2.7 1.7 93 8.8 2.1 -2.2 4.3 5.5 7.1 8.2 9.1 10.3 1 0 4 0 0.6 000000 1022 0.4 0.0 1.4
30 6 S 4 7 02 7.0 5.0 87 8.6 2.6 2.0 5.8 6.2 7.0 7.8 9.0 10.1 1 2 3 0 0.2 000000 1009 0.2 0.0 0.9
---------------------------------------------------------------------------------------------------------------------------
Mean
7 = 86 % 8.2 7.0 92 10.4 6.3 4.0 8.2 8.5 9.2 9.6 10.2 10.9 1023
Total 92.7 94.2 0.0 18.7
---------------------------------------------------------------------------------------------------------------------------
(.) Differences from 1994-2003 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (68%) [74%] and
Mean maximum 10.4 (-0.5) [+0.4] Sleet/snow falling 3 (+2.5) 74% of 1928-2003 average.
Mean minimum 6.3 (+0.6) [+1.8] Snow lying (at 09GMT) 0 (-0.1 0.0) Most in a day: 19.1 mm on 18th
Mean 8.4 (+0.1) [+1.1] Hail <5 mm 2 {-2.5} No. days:
No. days <0.0C 0 (-0.4) Hail >=5 mm 0 {all types} 0.0 mm 4 (- 0.4)
Mean grass min 4.0 (+1.2) Thunder heard 0 (-0.7) >=0.2 mm 23 (+ 0.9)
Lowest grass min -2.2 (+0.7) Gales 0 >=1.0 mm 17 (- 0.3)
No. days <0.0C 4 (-4.2) Fog (at 09GMT) 1 >=5.0 mm 7 (- 1.9)
Mean soil 30cm 9.6 (+0.5)
Lysimeter:
Highest maximum 12.9C (-2.6) on 4th. Lowest minimum 1.0 (-0.4) on 20th. PE 8.2 mm
Minimum relative humidity: 61% on 13th. No. days at 30 cm >=5.6C 30; days <5.6C nil. PWB 84.5 mm
* The mean temperature of 8.4C was close to the average of the last decade but +1.1C on PWS 84.8 mm
* the 1971-2000 average but was coolest since 2001. Rainfall 68% of average was highest since 2000 aPWD -0.3 mm
* The highest maximum of 12.9C ranked 3rd lowest since before 1979.
* The number of ground frosts (4) was 4 below average. Piche: 18.7 ml
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Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
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CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR DECEMBER 2004
---------------------------------------------------------------------------------------------------------------------------
-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 1 7 01 6.9 4.6 85 8.7 5.7 2.8 6.2 6.7 7.2 7.9 8.8 10.0 1 0 1 0 0.1 000000 1009 0.3 0.0 0.3
02 1 N 1 7 04 4.7 2.5 85 8.0 2.8 -0.2 4.2 5.5 7.0 7.6 8.7 10.0 1 2 5 0 1.1 000000 1015 1.6 0.0 0.5
03 8 SW 2 6 10 7.0 7.0 100 9.3 2.2 -2.0 5.3 5.3 6.0 6.8 8.2 10.0 1 2 3 0 0.1 000000 1020 0.2 0.0 0.1
04 7 SW 2 6 10 8.6 8.4 99 10.0 7.0 5.8 7.5 7.5 7.7 7.8 8.2 8.8 1 2 3 0 0.5 000000 1028 1.0 0.0 0.6
05 7 W 1 5 10 9.2 8.8 97 10.5 8.5 6.0 8.1 8.2 8.1 8.2 8.5 9.5 1 2 3 0 0.2 000000 1029 0.5 0.0 0.8
06 7 SW 6 6 05 9.6 6.8 83 10.5 9.0 6.6 8.2 8.4 8.5 8.5 8.8 9.5 1 0 0 0 1.3 000000 1024 1.3 0.0 0.7
07 1 NE 1 5 10 4.5 4.0 97 10.2 4.3 -0.2 5.5 6.8 8.0 8.5 9.0 9.8 1 1 1 0 0.0 000000 1028 0.0 0.0 0.8
08 6 S 1 5 10 9.2 8.0 92 10.9 4.2 0.6 6.6 6.6 7.2 7.8 8.6 9.8 1 2 1 0 0.0 000000 1028 0.0 0.0 1.0
09 5 NW 1 5 10 2.7 2.2 96 7.5 2.2 -0.9 3.8 5.1 6.8 7.5 8.5 9.5 1 0 5 0 0.0 000000 1024 0.0 0.0 0.7
10 6 S 1 5 04 6.5 4.9 89 10.0 2.0 -1.3 4.8 5.1 6.0 6.8 8.0 9.5 1 0 4 0 2.2 000000 1020 5.5 0.0 0.4
11 8 SW 2 5 04 10.0 9.6 97 10.5 6.4 5.2 8.5 8.3 7.8 7.8 7.8 9.2 1 2 3 0 tr/fr 000000 1025 0.0 0.0 0.3
12 1 00 0 7 10 3.8 3.8 100 6.4 3.0 -0.2 3.8 5.2 6.5 7.2 8.1 9.2 1 1 5 0 0.0 000000 1027 0.0 0.0 0.3
13 7 W 1 5 04 4.7 3.5 92 10.1 3.5 0.1 5.5 6.0 6.6 7.2 8.0 9.1 1 0 1 0 0.0 000000 1025 0.0 0.0 1.1
14 8 SW 6 7 10 10.1 8.9 92 10.9 4.6 4.2 7.8 7.5 7.2 7.5 8.0 9.1 1 0 0 0 7.0 000000 1017 8.0 0.0 0.7
15 8 00 0 7 02 8.2 7.8 97 9.6 8.2 7.5 9.0 9.0 8.8 8.4 8.2 9.0 1 2 3 0 12.8 000000 1016 2.1 0.0 1.0
16 5 W 4 6 10 7.0 6.6 97 8.6 3.4 -0.1 6.8 7.2 7.6 7.8 8.2 9.0 2 2 3 0 7.6 000000 997 6.3 0.0 0.8
17 8 NW 3 5 65 6.0 6.0 100 7.0 5.6 3.7 6.0 6.8 7.0 7.5 8.0 9.2 2 3 3 0 2.8 0040G0 992 2.2 0.0 0.7
18 6 NW 2 7 01 6.0 4.4 89 6.7 2.3 -1.3 5.0 5.2 6.0 6.8 7.8 8.9 1 2 4 0 tr 004000 1008 0.0 0.0 0.7
19 1 E 1 7 01 1.5 0.5 81 4.8 1.1 -1.5 2.0 3.5 5.3 6.5 7.6 8.9 1 0 5 0 3.2 000000 1014 1.5 5.8 0.9
20 8 SW 3 5 65 4.1 3.4 95 7.0 -1.5 -5.2 2.0 2.2 3.8 5.0 6.9 8.7 2 3 3 0 8.2 s04T00 1016 5.1 0.6 0.6
21 5 00 0 7 01 2.2 1.7 96 9.4 2.2 -1.0 2.0 2.2 3.7 5.5 7.0 8.7 1 2 5 0 31.9 000000 1026 8.5 0.0 0.4
22 8 W 4 6 10 9.4 9.4 100 10.8 2.2 -1.0 7.0 6.5 6.0 5.9 6.5 7.2 2 2 3 0 2.5 000000 1012 4.2 0.0 0.3
23 7 W 5 6 10 10.1 8.7 91 10.1 9.1 8.5 8.2 8.0 7.6 7.2 7.2 8.0 1 2 3 0 1.2 000000 1009 1.0 0.0 1.0
24 8 SW 4 7 10 6.5 4.7 88 7.6 5.1 3.9 5.8 6.3 7.0 7.2 7.5 8.2 2 2 4 0 7.1 004000 1001 4.0 0.0 0.5
25 8 N 5 4 86 0.3 0.0 98 5.0 0.3 -1.0 2.0 3.3 5.3 6.1 7.2 8.3 6 5 9 <1 6.6 sL4000 996 3.8 0.0 0.7
26 6 N 5 7 01 4.7 1.7 81 6.1 0.1 -1.2 3.0 3.5 4.2 5.1 6.5 8.2 5 2 6 0 0.0 006T00 1011 0.0 0.0 0.9
27 8 SW 3 7 80 5.7 4.1 89 9.0 1.0 -2.7 3.0 3.0 3.7 4.8 6.2 8.0 1 1 4 0 14.0 0000G0 1017 4.9 0.0 0.5
28 4 NW 3 7 10 2.5 1.5 93 6.1 2.0 -0.8 2.5 3.5 4.8 5.4 6.4 7.8 2 2 5 0 tr 000000 1008 0.0 0.0 0.6
29 8 SW 3 7 60 6.1 4.7 91 10.2 2.1 -1.5 3.0 3.0 4.0 5.0 6.0 7.6 1 2 4 0 2.2 000000 1024 3.4 0.0 0.2
30 1 SW 5 6 10 9.0 8.0 93 10.5 6.1 5.2 6.8 6.8 6.5 6.2 6.2 7.6 1 2 3 0 14.6 000000 1024 8.2 0.0 0.3
31 7 NW 1 7 01 7.0 6.6 97 8.8 6.9 6.4 7.9 7.9 7.8 7.2 7.0 7.6 2 2 3 0 tr 000000 1022 0.0 0.0 0.5
------------------------------------------------------------------------------------------------------------------
Mean
6 = 74 % 6.3 5.3 93 8.7 3.9 1.4 5.4 5.8 6.4 6.9 7.7 8.8 1016
Total 127.2 73.6 6.4 18.9
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(.) Differences from 1994-2003 average used by the Weather Observers Network & [.] from 1971-2000 average.
Air temperatures Weather (No. days occurrence) Rainfall was (104%) [110%] and
Mean maximum 8.7 (+0.7) [+0.8] Sleet/snow falling 2 (-0.8) 112% of 1928-2003 average.
Mean minimum 3.9 (+0.7) [+0.8] Snow lying (at 09GMT) 1 (-0.4) Most in a day: 31.9 mm on 21st
Mean 6.3 (+0.7) [+0.8] Hail <5 mm 5 {+0.8} No. days:
No. days <0.0C 1 (-4.4) Hail >=5 mm 1 {all types} 0.0 mm 6 (+ 1.0)
Mean grass min 1.4 (+1.1) Thunder heard 2 (+1.2) >=0.2 mm 19 (- 1.4)
Lowest grass min -5.2 (+1.9) Gales 2 >=1.0 mm 17 (+ 0.8)
No. days <0.0C 17 (+2.8) Fog (at 09GMT) 0 >=5.0 mm 9 ( 0.0)
Mean soil 30cm 6.9 (+0.6)
Lysimeter:
Highest maximum 10.9C (-2.1) on 8,14th. Lowest minimum -1.5 (+0.9) on 20th. PE 7.3 mm
Minimum relative humidity: 77% on 8th. No. days at 30 cm >=5.6C 25; days <5.6C 6. PWB 119.9 mm
* Mean temperature 6.3C was warmest since 1998 (6.7C) and ranks 6th on record since 1979. PWS 120.0 mm
* The soil temperature at 30 cm depth 6.9C was warmest since 1997 ranking 3rd since 1990. PWD -0.1 mm
* Drier than Dec 2003 (136.5 mm) and 2000 (153.6 mm) ranking 28th since 1929.
* Hi max 10.9C was lowest since 1990 and one of the 8th coolest in Dec since 1979. Piche: 18.9 ml
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Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather SYNOP code (eg. 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze)
Temperatures (degC); Temp dry bulb temperature; Dpt dewpoint; RH relative humidity (%); soil temperatures are under bare
soil and earth under grass; SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C,
and grass Gr codes consult the page on 'Recording Atmospheric Depositions on Grass'.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1994-2003 average used by the Weather Observers Network. Rainfall 1320.0 mm was (120%) [1
[.] Difference from 1971-2000 average. or 119% of 1929-2003 average.
Air temperatures Weather (No. days occurrence) Most in a day: 86.0 (Oct 22),
Mean maximum 13.4 (-0.1) [ 0.0] Sleet/snow falling 15 (+1.1) 33.4 mm (Feb 2) and
Mean minimum 7.4 (+0.3) [+1.0] Snow lying (at 09GMT) 6 (+2.6) 31.9 mm (Dec 21).
Mean 10.4 (+0.1) [+0.5] Hail <5 mm 32 [+ 5.6] No. of days with:
No. days <0.0C 14 (-4.0) Hail >=5 mm 3 [all hail] >=0.2 mm 223 (+17)
Mean grass min 5.2 (+0.4) Thunder heard 13 (+4.9) >=1.0 mm 167 (+10)
Lowest grass min -6.5 (+0.6) Gales 17 >=5.0 mm 80 (+5)
No. days <0.0C 67 (-4.0) Fog (at 09GMT) 6 Lysimeter:
Mean soil 30cm 11.5 (+0.3) PE 345.2 mm
PWB 974.9 mm
* Highest maximum 27.7 (-0.1) on Aug 2nd. Lowest minimum -2.1 (+1.8) on Jan 29th. PWS 1133.1 mm
* Minimum relative humidity: 42% on Sep 8th and 44% on Mar 30th. PWD -158.2 mm
* Frost-free (air) from Mar 12th to Dec 19th (ground) Apr 18th to Nov 18th. Piche: 386.5 mls
* Wettest since 2000 (1484 mm) ranking 5th wettest on record. Mean 10.4C ranked 9th warmest.
* Air frosts 14 ranked 6th lowest while ground frosts ranked 11th lowest.
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Annual summaries for 2004 (No. days occurrence at 09 GMT).
Cloud cover Wind direction Wind speed Visibility Code Description
Cloud obscured 6 N 37 Calm 28 <100 m 0 Dense fog 0
8/8 cloud 127 NE 30 Force 1-3 212 100-190 m 1 Thick fog 0
6/8 to 7/8 147 E 21 Force 4-5 101 200-390 m 2 Fog 6
3/8 to 5/8 49 SE 19 Force 6-7 23 400-900 m 3 Mod. fog 0
1/8 to 2/8 31 S 63 Force 8-12 2 1.0-1.9 km 4 Very poor 19
Sky cloudless 6 SW 67 2.0-3.9 km 5 Poor 62
W 54 Check 366 4.0-9.0 km 6 Moderate 64
Check 366 NW 47 10 km or more 7 Good 215
Calm 28
Check 366
Check 366
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 1 3 0 15 5 5 1 0 0 1 31
Feb 3 5 0 8 4 4 1 0 0 4 29
Mar 4 8 1 10 3 2 0 1 0 2 31
Apr 3 14 0 12 1 0 0 0 0 0 30
May 2 18 2 9 0 31
Jun 8 9 1 12 0 0 30
Jul 1 11 0 19 0 0 31
Aug 0 11 2 18 31
Sep 2 15 2 11 30
Oct 1 10 1 17 2 31
Nov 2 6 0 18 4 0 0 0 30
Dec 2 4 0 12 5 6 1 0 0 1 31
Yr 29 114 9 161 24 17 3 1 0 8 366
State of ground
Cod 0 1 2 3 4 5 6 7 8 9 Check
Jan 0 22 5 4 0 0 0 0 31
Feb 1 18 5 1 0 1 1 1 1 29
Mar 2 24 4 1 0 0 31
Apr 5 25 0 0 0 0 0 30
May 18 13 0 31
Jun 15 15 30
Jul 4 27 31
Aug 4 27 0 31
Sep 5 25 0 30
Oct 0 28 3 0 31
Nov 0 30 0 0 0 30
Dec 0 22 7 0 0 1 1 0 0 31
Yr 54 276 24 6 0 2 2 1 0 1 366
State of concrete
Cod 0 1 2 3 4 5 6 7 8 9 Check
Jan 1 5 15 8 0 0 2 0 31
Feb 11 2 9 3 0 1 1 1 1 29
Mar 18 2 8 3 0 0 0 31
Apr 19 4 4 3 0 0 30
May 23 0 3 5 31
Jun 20 2 3 5 30
Jul 17 6 4 4 31
Aug 11 10 5 5 31
Sep 8 11 11 0 30
Oct 6 5 14 6 31
Nov 6 4 10 10 0 0 30
Dec 7 3 18 2 0 1 0 0 31
Yr 147 54 104 54 0 2 3 1 0 1 366
These pages are designed and written by Donald Perkins © 1998 - 2004Page dated 1 January 2004: http://www.llansadwrn-wx.co.uk |