Llansadwrn (Anglesey) Weather
Daily Observations 1998
at 0900 GMT
View with screen resolution 1024 x 638 or larger. Use F11 toggle to fill your screen
|
Llansadwrn (Anglesey) Weather |
|
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JANUARY 1998
------------------------------------------------------------------------------------------------------------------------
-09GMT--> -Air Temperature- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C Gr SS Rain SLHTGF Press hrs hrs Evap
------------------------------------------------------------------------------------------------------------------------
01 7 SW 6 6 10 6.1 83 9.4 2.5 4.0 4.0 4.3 5.4 6.3 7.2 8.4 1 2 3 0 10.2 004000 997.2 6.6 0.0 1.4
02 7 W 1 7 21 5.5 98 10.3 5.5 2.6 5.1 5.5 6.1 6.5 7.0 8.3 1 3 3 0 6.7 000t00 976.8 6.4 0.0 1.1
03 8 W 6 7 60 7.7 84 7.9 5.1 1.5 7.0 7.1 7.0 6.8 7.1 8.3 1 3 3 0 3.7 0040G0 973.2 3.6 0.0 1.7
04 7 S 5 7 61 5.0 92 7.5 3.0 0.3 4.1 4.5 5.2 6.0 7.0 8.2 1 3 3 0 7.6 0000G0 976.3 7.4 0.0 0.7
05 8 N 1 7 60 3.3 90 5.6 2.7 -3.6 3.6 3.9 5.1 6.1 7.1 8.3 1 3 3 0 0.1 000000 987.8 0.0 0.0 0.4
06 8 S 4 7 61 5.4 78 9.5 1.1 3.0 1.4 2.4 3.0 5.2 6.1 8.2 1 3 3 0 7.1 004t00 1004.2 8.0 0.0 1.3
07 7 SW 4 7 80 5.1 92 9.8 4.7 3.0 4.1 4.5 5.2 5.1 6.2 8.0 1 3 3 0 11.8 005000 993.8 4.0 0.0 1.7
08 8 SW 8 5 63 9.8 95 12.0 4.0 2.2 6.4 5.4 5.0 5.3 6.3 7.8 2 3 3 0 9.0 0000G0 998.0 5.8 0.0 1.2
09 7 SW 5 6 10 11.5 88 12.5 8.1 7.8 9.5 8.7 7.7 7.2 7.0 8.0 1 1 0 0 0.0 000000 1013.5 0.0 0.0 2.3
10 7 S 5 5 01 12.5 71 16.5 10.9 9.9 9.0 8.8 8.4 8.1 7.7 8.0 1 0 0 0 0.0 000000 1015.0 0.0 0.0 6.7
11 5 S 2 7 02 12.7 53 14.6 12.2 10.0 7.5 7.9 8.4 8.2 7.9 8.0 1 0 0 0 5.7 000000 1007.9 4.1 0.0 1.9
12 8 S 5 7 80 10.4 85 11.0 7.0 4.9 7.9 7.7 8.0 8.0 8.0 8.1 1 3 3 0 5.2 000000 1008.3 9.6 0.0 0.6
13 8 NE 1 5 60 8.7 99 9.4 7.5 4.3 7.7 7.8 8.0 8.0 8.0 8.2 1 2 3 0 11.9 000000 998.9 12.4 0.0 0.1
14 7 NW 3 5 01 5.1 94 9.2 4.9 3.4 5.7 6.6 7.5 8.0 8.0 8.2 1 2 3 0 1.0 000000 1002.6 3.3 0.0 1.1
15 6 SW 3 7 01 7.0 82 8.7 4.5 2.7 5.8 6.3 7.0 7.3 7.8 8.2 1 2 3 0 1.7 000000 1002.2 1.8 0.0 1.4
16 7 N 1 5 50 5.8 95 8.2 5.0 1.8 5.3 5.5 5.8 7.1 7.6 8.2 1 3 3 0 0.5 000000 1007.5 0.5 0.0 0.7
17 7 SW 4 7 02 7.5 86 8.5 4.3 0.4 5.7 5.9 6.5 6.9 7.5 8.2 1 1 0 0 6.8 000000 1018.9 6.1 0.0 1.0
18 8 SW 2 5 63 7.4 97 7.5 6.5 5.4 6.6 6.6 6.8 7.0 7.5 8.3 2 3 3 0 7.7 000000 984.3 14.1 0.0 0.3
19 8 N 5 5 83 3.0 91 3.5 2.8 1.9 4.5 5.4 6.5 6.9 7.3 8.2 1 3 3 0 0.2 s04000 1005.9 0.5 0.0 1.6
20 6 NE 1 7 02 -0.5 90 6.3 -1.0 -4.9 1.0 2.2 4.1 5.7 7.0 8.1 3 0 5 0 2.5 000000 1029.8 6.0 4.0 1.8
21 8 S 3 7 02 6.3 82 9.2 -0.5 -2.4 4.0 3.8 4.2 5.1 6.2 8.0 1 2 4 0 1.1 004000 1028.7 0.8 0.0 0.9
22 8 SW 1 7 02 9.2 91 9.8 6.3 5.4 7.2 6.8 6.3 6.1 6.5 8.0 1 2 3 0 3.0 000000 1028.7 8.6 0.0 0.3
23 7 NE 1 5 42 5.5 100 6.0 5.5 4.9 6.7 6.8 7.0 6.8 7.0 7.9 1 2 3 0 0.0 000000 1030.5 0.0 0.0 0.6
24 1 NE 1 7 04 1.7 91 7.8 1.6 -0.7 2.0 3.6 5.6 6.4 6.9 7.9 1 0 5 0 0.0 000000 1037.3 0.0 0.0 0.7
25 1 E 1 7 04 1.0 87 6.6 0.0 -4.3 0.9 2.3 4.1 5.3 6.5 7.9 3 0 7 0 0.0 000000 1038.0 0.0 0.0 0.8
26 1 NE 1 7 04 0.5 82 7.5 0.3 -4.4 0.5 1.6 3.3 4.4 6.0 7.9 3 0 5 0 0.0 000000 1037.3 0.0 6.0 0.8
27 8 00 0 7 04 0.2 86 6.5 -2.0 -6.9 0.2 1.2 2.6 3.5 5.1 7.7 3 0 7 0 0.0 000000 1029.1 0.0 16.6 0.3
28 8 N 1 7 05 0.0 90 4.1 -2.2 -6.6 0.1 1.0 2.2 3.0 4.7 7.5 3 0 7 0 0.0 000000 1024.6 0.0 9.8 0.7
29 1 NE 1 7 04 0.2 90 9.0 -0.5 -5.0 0.5 1.4 2.6 3.4 4.7 7.2 3 0 7 0 0.0 000000 1025.0 0.0 3.8 0.8
30 8 E 1 7 02 4.0 83 6.5 0.0 -4.4 2.7 3.1 3.5 3.8 4.8 7.0 1 0 0 0 0.0 000000 1022.7 0.0 0.0 0.4
31 7 E 1 7 04 3.7 92 6.3 2.0 -1.4 2.9 3.3 3.9 4.0 5.0 6.9 1 0 1 0 0.0 000000 1021.6 0.0 0.0 0.4
------------------------------------------------------------------------------------------------------------------------
Mean
7 5.5 88 8.6 3.6 1.1 4.5 4.9 5.5 6.0 6.7 8.0 1010.5
Total 103.5 109.6 40.2 35.4
------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1988-97 average used by the Climatological Observers Link. Rainfall was 106% of average
Air temperatures Weather (No. days occurrence) and 106% of 1961-90 average.
Mean maximum 8.6 (+0.7) Sleet/snow falling 1 Most in a day: 11.9 mm (13th).
Mean minimum 3.6 (+0.8) Snow lying (at 09GMT) 0 (-0.5) No. days
Mean 6.1 (+0.8) Hail <5 mm 5 [+3.3] >=0.2 mm 19 ( 0.0)
No. days <0.0C 5 (-0.5) Hail >=5 mm 1 [all hail] >=1.0 mm 17 (+ 1.8)
Mean grass min 1.1 (+0.4) Thunder heard 1 (+0.5) >=5.0 mm 11 (+ 5.0)
Lowest grass min -6.9 (-1.4) Gales 3 Lysimeter:
No. days <0.0C 11 (-2.4) Fog (at 09GMT) 0 PE 19.8 mm
PWB 83.7 mm
Minimum relative humidity: 46% on 11th at 01h GMT PWS 86.5 mm
PWD -2.8 mm
* Highest maximum 16.5C at 2230 GMT on 10th, in SE Fohn wind off the mountains. Piche: 35.4 ml
Lowest minimum -2.2C on 28th.
------------------------------------------------------------------------------------------------------------------------
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 recent rain, 42 fog thinning, 50 slight drizzle, 60 slight intermittent rain, 61 continuous slight rain,
moderate rain, 80 slight rain shower, 83 slight sleet.
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 FEBRUARY 1998
------------------------------------------------------------------------------------------------------------------------
-09GMT--> -Air Temperature- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C Gr SS Rain SLHTGF Press hrs hrs Evap
------------------------------------------------------------------------------------------------------------------------
01 5 W 1 7 04 0.4 92 8.2 -0.2 -5.3 0.9 1.9 3.4 4.0 5.0 6.9 3 0 7 0 0.7 004000 1020.8 0.6 4.0 0.5
02 6 N 1 7 05 1.3 98 8.7 0.4 -3.7 0.9 1.9 3.3 3.9 4.8 6.8 3 4 7 0 1.5 000000 1017.8 1.2 0.0 0.7
03 6 SE 1 7 02 2.2 89 7.6 0.5 -3.7 0.9 1.8 3.0 4.7 4.8 6.8 1 2 4 0 0.6 000000 1016.2 0.2 0.0 0.8
04 7 NW 1 6 80 5.7 97 8.3 2.2 0.3 4.3 4.2 4.0 4.0 4.7 6.7 1 2 3 0 tr 000000 1013.5 0.0 0.0 0.6
05 7 W 1 5 02 7.0 94 8.9 4.4 1.0 5.1 5.1 4.9 4.8 5.0 6.6 1 2 1 0 0.9 000000 1018.5 0.4 0.0 1.1
06 6 SW 6 6 81 7.0 91 8.0 5.4 5.3 5.7 5.7 5.7 5.6 5.6 6.7 1 2 3 0 15.0 0050G0 1013.5 8.2 0.0 1.0
07 5 NW 1 7 01 3.1 91 9.3 1.6 -0.6 2.4 3.4 5.0 5.3 5.9 6.8 1 2 4 0 0.4 000000 1014.6 1.6 0.0 1.2
08 7 SW 5 6 02 7.9 90 9.7 3.1 -0.5 5.8 5.3 5.1 5.3 5.8 6.7 1 2 3 0 0.8 000000 1020.1 1.5 0.0 1.1
09 8 SW 4 5 20 8.7 99 9.3 7.8 7.4 7.9 7.5 6.8 6.3 6.0 6.7 1 2 3 0 6.4 000000 1018.5 11.8 0.0 0.5
10 8 S 1 2 44 9.0 100 10.0 8.4 7.0 8.4 8.0 7.5 7.0 7.0 7.0 1 3 3 0 5.3 00000F 1020.8 10.1 0.0 0.4
11 8 SW 5 5 60 10.0 93 10.7 8.7 8.4 8.8 8.4 8.9 7.7 7.1 7.1 1 3 3 0 1.3 000000 1018.5 2.1 0.0 0.5
12 8 SW 5 5 02 10.0 97 11.5 9.5 9.2 9.4 9.2 8.5 8.1 7.5 7.2 1 2 3 0 tr 000000 1022.7 0.0 0.0 0.5
13 8 S 4 4 10 10.7 100 12.4 9.8 9.5 9.9 9.5 9.0 8.8 8.0 7.5 1 2 2 0 0.0 000000 1029.4 0.0 0.0 1.0
14 2 S 5 5 04 9.5 80 13.3 7.5 5.0 7.3 7.5 8.1 8.3 8.0 7.7 1 0 0 0 tr 000000 1030.2 0.0 0.0 2.4
15 8 S 1 7 03 11.0 66 15.0 9.5 8.2 8.4 8.5 8.5 8.6 8.3 7.8 1 0 0 0 0.1 0000G0 1027.2 0.0 0.0 2.6
16 7 NW 3 7 01 8.9 89 12.8 8.3 7.2 8.3 8.4 8.7 8.8 8.5 7.8 1 0 0 0 0.0 000000 1020.8 0.0 0.0 0.6
17 6 W 1 7 04 7.8 93 12.4 4.0 -0.6 6.7 6.8 7.7 8.2 8.2 8.0 1 0 4 0 tr 000000 1036.3 0.0 0.0 0.7
18 6 S 1 7 04 7.2 90 10.0 3.7 0.8 6.2 6.7 7.7 8.1 8.2 8.0 1 2 1 0 0.0 000000 1032.0 0.0 0.0 1.1
19 6 S 4 6 05 9.8 96 11.7 6.2 4.4 8.6 8.2 7.9 8.0 8.0 8.0 1 0 0 0 0.0 000000 1024.6 0.0 0.0 2.2
20 6 SW 5 5 05 10.6 77 13.6 8.5 7.8 8.2 8.3 8.4 8.6 8.3 8.3 1 0 0 0 5.5 0000G0 1011.5 4.6 0.0 2.0
21 8 00 0 5 21 5.7 98 10.0 5.6 5.4 7.1 7.6 8.3 8.6 8.6 8.3 1 3 3 0 5.5 004000 1004.2 2.5 0.0 0.7
22 1 00 0 7 05 3.3 98 11.3 1.3 -2.7 2.9 4.3 6.4 7.7 8.0 8.2 1 2 6 0 1.7 004000 1020.8 2.9 0.0 1.2
23 8 S 3 5 02 8.6 99 11.1 3.4 1.1 7.5 7.3 7.2 7.6 7.8 8.2 1 2 3 0 0.0 000000 1031.3 0.0 0.0 0.6
24 4 W 1 5 05 6.9 99 14.3 6.5 2.7 6.2 7.0 7.8 7.9 8.0 8.3 1 0 1 0 0.0 000000 1038.4 0.0 0.0 1.0
25 7 SW 2 7 02 8.2 87 10.0 6.7 3.4 7.5 7.6 8.0 8.0 8.0 8.3 1 0 1 0 0.0 000000 1039.4 0.0 0.0 1.9
26 8 SW 4 6 02 8.7 96 9.4 7.3 6.4 7.9 7.7 7.8 8.0 8.0 8.3 1 0 0 0 1.4 000000 1029.4 1.7 0.0 1.2
27 8 SW 6 7 02 7.6 83 8.3 5.6 3.4 6.4 6.4 7.1 7.8 8.0 8.1 1 0 0 0 4.8 000000 1015.8 5.1 0.0 0.9
28 6 NW 1 6 02 2.4 93 7.2 1.5 -0.3 3.0 4.0 5.7 7.0 7.8 8.2 1 2 4 0 1.2 0040G0 1013.5 2.0 0.0 1.2
------------------------------------------------------------------------------------------------------------------------
Mean
6 7.1 92 10.5 5.3 3.1 6.2 6.4 6.8 7.0 7.1 7.5 1022.2
Total 53.1 56.5 4.0 30.2
------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1988-97 average used by the Climatological Observers Link. Rainfall was 54% of average
Air temperatures Weather (No. days occurrence) but 80% of 1961-90 average.
Mean maximum 10.5 (+2.2) Sleet/snow falling 0 (-3.5) Most in a day: 15.0 mm (6th).
Mean minimum 5.3 (+2.7) Snow lying (at 09GMT) 0 (-1.2) No. of days with:
Mean 7.9 (+2.4) Hail <5 mm 4 [+2.4] >=0.2 mm 16 (- 2.7)
No. days <0.0C 1 (-4.5) Hail >=5 mm 1 [all hail] >=1.0 mm 11 (- 3.3)
Mean grass min 3.1 (+2.1) Thunder heard 0 (-0.7) >=5.0 mm 5 (- 1.9)
Lowest grass min -5.3 (-0.5) Gales 3 Lysimeter:
No. days <0.0C 8 (-3.4) Fog (at 09GMT) 1 PE 22.1 mm
PWB 31.0 mm
Highest maximum 15.0C on 15th. Lowest minimum -0.2C on 1st. PWS 36.2 mm
Minimum relative humidity: 56% on 15th. PWD -5.2 mm
* Fall of beige coloured dust occurred on the 15/16th. Piche: 30.2 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, 05 haze, 20 drizzle
in past hr., 44 fog no change, 60 intermittent slight rain, 80 slight rain shower, 81 moderate 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 MARCH 1998
------------------------------------------------------------------------------------------------------------------------
-09GMT--> -Air Temperature- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C Gr SS Rain SLHTGF Press hrs hrs Evap
------------------------------------------------------------------------------------------------------------------------
01 7 S 1 7 02 4.7 89 9.0 2.4 -0.5 3.9 4.2 5.4 6.5 7.2 8.2 1 2 4 0 1.5 004000 1011.9 1.2 0.0 1.1
02 8 SW 4 6 03 7.5 93 10.4 4.6 3.5 6.0 5.6 6.0 6.7 7.1 8.0 1 1 4 0 34.1 000000 1011.5 16.5 0.0 0.9
03 8 S 4 5 65 10.4 99 10.6 7.2 6.4 9.1 8.5 7.8 7.5 7.5 8.2 2 3 3 0 19.0 000000 987.8 15.9 0.0 0.2
04 2 NW 5 7 02 4.6 89 8.7 2.3 -0.2 4.5 5.5 7.0 7.6 7.9 8.1 1 2 4 0 7.2 004000 993.0 3.5 0.0 1.4
05 6 W 2 7 03 4.0 80 9.5 2.7 0.4 3.1 4.2 5.8 6.9 7.5 8.1 1 2 1 0 12.0 004000 1014.2 11.3 0.0 0.9
06 8 S 3 4 63 9.5 99 9.8 3.9 2.9 7.9 7.3 6.5 7.0 7.5 8.2 2 3 3 0 17.6 0000G0 1005.9 10.2 0.0 0.1
07 7 SW 5 5 02 8.6 90 10.5 7.9 6.9 8.0 7.8 7.9 8.0 7.8 8.0 1 2 3 0 4.1 000000 998.9 2.6 0.0 0.6
08 4 NE 2 7 01 5.5 94 10.6 3.9 2.2 6.1 6.6 7.5 7.9 7.9 8.0 1 2 3 0 0.0 000000 1009.5 0.0 0.0 1.1
09 1 S 1 7 05 5.5 78 8.6 1.5 -2.2 4.5 5.1 6.6 7.8 8.0 8.1 1 0 4 0 0.0 000000 1025.0 0.0 0.0 2.4
10 8 S 7 6 02 7.8 79 9.5 5.0 3.6 5.5 5.6 6.5 7.4 7.9 8.3 1 0 0 0 5.1 000000 1016.2 10.5 0.0 0.9
11 6 N 6 7 05 5.6 68 11.0 5.4 4.3 5.6 6.3 7.0 7.5 7.8 8.2 1 0 3 0 0.0 000000 1020.1 0.0 0.0 1.5
12 7 SW 1 7 03 4.7 87 8.6 1.0 -3.6 4.7 5.0 6.5 7.4 7.8 8.2 1 0 4 0 1.2 000000 1028.7 4.3 0.0 0.2
13 8 NW 1 5 21 7.8 96 9.8 4.7 4.5 7.3 7.1 7.1 7.3 7.7 8.2 1 2 3 0 tr 000000 1029.8 0.0 0.0 0.5
14 8 NW 1 6 02 8.1 89 10.1 7.3 6.1 7.8 7.5 7.6 7.9 7.9 8.2 1 0 1 0 0.1 000000 1034.9 0.0 0.0 0.6
15 8 W 1 5 50 7.8 96 10.3 7.5 7.8 8.0 8.0 8.1 8.2 8.2 8.3 1 2 3 0 tr 000000 1036.6 0.0 0.0 0.6
16 8 SW 1 6 02 8.2 93 9.6 7.4 6.6 8.0 8.0 8.2 8.5 8.5 8.5 1 0 0 0 tr 000000 1033.8 0.0 0.0 0.9
17 8 SW 1 5 20 8.8 93 11.0 7.3 6.9 8.5 8.3 8.3 8.5 8.5 8.5 1 1 3 0 tr 000000 1032.3 0.0 0.0 0.7
18 5 NW 2 6 05 9.2 88 14.2 4.8 -0.4 7.5 7.5 8.0 8.5 8.5 8.5 1 0 4 0 0.0 000000 1037.7 0.0 0.0 1.0
19 6 00 0 7 02 6.7 97 12.5 3.1 -1.6 6.0 6.4 7.8 8.5 8.5 8.5 1 0 4 0 0.0 000000 1044.9 0.0 0.0 0.8
20 8 N 1 7 02 8.5 93 10.9 6.0 2.6 8.1 7.9 8.2 8.7 8.7 8.5 1 0 1 0 0.0 000000 1043.9 0.0 0.0 0.7
21 7 SW 1 7 02 7.9 87 11.4 6.6 5.7 8.1 8.1 8.5 8.5 8.9 8.6 1 0 1 0 0.0 000000 1041.2 0.0 0.0 1.3
22 0 NE 1 6 05 8.0 74 14.3 3.5 -1.8 5.7 6.5 8.0 8.9 8.9 8.9 1 0 4 0 0.0 000000 1037.0 0.0 0.0 1.0
23 8 S 1 4 02 7.1 91 9.4 6.3 5.1 8.2 8.4 9.0 9.3 9.0 8.8 1 0 1 0 5.8 000000 1035.6 7.3 0.0 1.0
24 8 S 2 5 21 7.6 99 9.6 6.5 5.4 7.6 7.8 8.2 8.9 8.9 8.9 1 3 3 0 24.4 000000 1029.4 18.8 0.0 0.3
25 8 S 4 5 51 8.9 97 11.0 7.1 7.0 9.1 8.8 8.8 8.9 8.9 8.9 1 3 3 0 17.2 000000 1022.0 14.0 0.0 0.5
26 8 SW 7 5 02 9.5 99 12.1 8.9 8.8 9.5 9.3 9.4 9.4 9.1 8.9 1 2 3 0 0.2 000000 1006.3 0.0 0.0 0.7
27 8 SW 4 5 02 10.2 97 12.9 7.5 5.0 9.5 9.2 9.1 9.4 9.2 8.9 1 1 3 0 0.0 000000 1011.9 0.0 0.0 1.9
28 7 S 3 7 01 12.0 74 15.4 9.2 6.7 9.5 9.2 9.2 9.5 9.5 9.0 1 0 0 0 tr 000000 1006.3 0 0.0 1.8
29 8 NE 1 7 02 11.6 87 14.4 8.0 3.1 9.5 9.2 9.5 9.8 10.0 9.1 1 0 1 0 2.9 000000 1007.9 1.9 0.0 1.3
30 8 SW 4 6 10 10.0 93 13.3 9.8 9.4 10.3 10.5 10.2 10.2 10.0 9.5 1 1 3 0 0.0 000000 1007.5 0.0 0.0 1.6
31 1 NE 1 7 05 10.0 93 15.7 5.0 -0.6 7.4 7.5 8.8 9.8 9.8 9.5 1 0 4 0 0.0 000000 1016.6 0.0 0.0 1.5
------------------------------------------------------------------------------------------------------------------------
Mean
7 7.9 90 11.1 5.6 3.5 7.2 7.3 7.8 8.3 8.4 8.5 1020.6
Total 152.4 118.0 0.0 30.0
------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1988-97 average used by the Climatological Observers Link. Rainfall was 174% of average
Air temperatures Weather (No. days occurrence) and 200% of 1961-90 average.
Mean maximum 11.1 (+0.8) Sleet/snow falling 0 (-2.3) Most in a day: 34.1 mm (2nd).
Mean minimum 5.6 (+1.6) Snow lying (at 09GMT) 0 (-0.3) No. of days with:
Mean 8.4 (+1.2) Hail <5 mm 3 [+1.0] >=0.2 mm 20 (+ 1.5)
No. days <0.0C 0 (-1.8) Hail >=5 mm 0 [all hail] >=1.0 mm 14 (- 0.2)
Mean grass min 3.5 (+1.3) Thunder heard 0 (-0.5) >=5.0 mm 9 (+ 2.8)
Lowest grass min -3.6 (+0.6) Gales 1 Lysimeter:
No. days <0.0C 8 (-0.9) Fog (at 09GMT) 0 PE 27.3 mm
PWB 36.5 mm
Highest maximum 15.7C on 31st. Lowest minimum 1.0C on 12th. PWS 37.0 mm
Minimum relative humidity: 60% on 18th and 22nd. PWD -0.5 mm
* Warmest March in 19y records, 4th wettest in records since 1928. Piche: 30.0 ml
------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 05 haze, 10 mist,
20 drizzle in past hour, 21 rain in past hour, 50 slight drizzle, 51 moderate drizzle, 63 moderate rain, 65 heavy 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 1998
------------------------------------------------------------------------------------------------------------------------
-09GMT--> -Air Temperature- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C Gr SS Rain SLHTGF Press hrs hrs Evap
------------------------------------------------------------------------------------------------------------------------
01 5 SE 1 6 03 10.5 77 14.5 6.1 2.5 9.0 8.5 9.1 9.9 10.0 9.5 1 0 1 0 4.2 000000 1011.5 3.9 0.0 1.2
02 7 S 2 7 01 9.8 82 14.5 7.4 3.8 10.0 9.4 9.6 10.2 10.0 9.5 1 2 3 0 10.7 000000 1002.6 9.2 0.0 1.4
03 8 S 2 6 61 7.9 83 12.2 5.5 4.5 9.0 9.0 9.7 10.3 10.2 8.5 1 3 3 0 1.5 004000 978.1 3.4 0.0 1.6
04 8 00 0 5 63 9.6 85 11.7 7.0 4.4 9.8 9.3 9.5 10.3 10.3 9.6 1 3 3 0 4.3 000000 971.8 4.9 0.0 0.3
05 8 S 2 5 03 8.5 96 9.4 6.1 2.3 9.4 9.0 9.5 10.2 10.2 9.8 1 2 3 0 7.8 000000 986.1 4.6 0.0 0.5
06 7 00 0 6 27 7.1 93 12.2 6.6 5.7 8.5 8.7 9.0 10.0 10.0 9.8 2 3 3 0 3.7 004000 995.9 1.9 0.0 0.5
07 7 NE 1 7 01 8.7 90 14.4 4.6 1.1 9.8 9.5 9.0 10.0 10.0 9.8 1 0 1 0 0.0 000000 1000.1 0.0 0.0 0.7
08 7 NW 1 6 10 8.0 90 11.0 5.7 3.3 9.0 9.0 9.5 10.3 10.4 9.8 1 0 1 0 14.7 s00000 997.2 10.5 0.0 0.7
09 8 NE 7 5 63 4.3 90 6.6 4.0 3.1 6.4 7.5 9.0 10.1 10.3 9.8 1 3 3 0 0.3 s04000 998.9 0.8 0.0 1.3
10 7 NE 5 7 25 4.6 73 7.7 2.0 1.1 5.0 5.5 7.0 9.0 9.8 10.0 1 0 3 0 0.4 004000 999.7 3.0 0.0 1.9
11 7 NE 6 7 27 4.2 74 8.1 2.3 1.2 4.8 5.1 6.6 8.3 9.2 9.9 1 0 6 0 0.6 s04000 1005.9 2.2 0.0 1.9
12 6 N 2 7 01 6.1 69 10.0 0.5 -1.5 6.0 4.9 6.4 8.0 8.9 9.8 1 0 6 0 2.1 s05000 1009.5 1.6 0.0 1.7
13 6 N 1 6 26 2.3 87 10.3 0.9 -2.7 4.0 4.9 6.5 8.2 8.4 9.8 5 2 6 0 2.6 s04000 1010.7 2.3 0.0 1.2
14 5 NW 2 7 02 5.9 76 7.0 0.5 -1.7 6.0 5.2 6.6 8.2 8.9 9.3 1 2 6 0 4.2 S04000 999.3 2.3 0.0 0.7
15 2 NE 3 7 02 3.7 76 10.6 0.0 -0.4 3.4 4.0 5.6 7.3 8.5 9.3 1 0 9 0 0.9 000000 999.9 0.8 0.0 1.4
16 5 N 1 7 03 5.5 78 10.3 0.0 -2.4 5.2 5.0 6.7 8.2 8.8 9.2 1 2 4 0 tr 000000 991.3 0.0 0.0 2.5
17 3 N 5 7 02 6.0 64 12.1 4.5 3.1 6.7 6.5 7.5 8.7 8.9 9.2 1 0 0 0 0.0 000000 999.3 0.0 0.0 2.2
18 3 NE 1 7 05 8.2 74 13.3 1.5 -2.0 7.5 6.0 7.5 8.8 9.0 9.3 1 0 4 0 0.0 000000 1007.1 0.0 0.0 1.7
19 8 S 1 7 05 9.5 69 9.9 3.0 -1.2 8.8 7.6 8.1 9.2 9.5 9.2 1 0 4 0 9.4 000000 1003.4 6.4 0.0 0.6
20 8 SW 1 5 63 7.1 96 13.1 6.9 5.6 8.7 8.7 8.7 9.3 9.2 9.2 1 3 3 0 0.5 000000 1004.6 0.4 0.0 1.5
21 8 S 3 7 02 8.8 82 12.4 6.5 3.5 9.0 8.7 8.9 9.7 9.8 9.4 1 1 3 0 1.1 000000 1008.7 5.4 0.0 1.9
22 8 S 4 7 02 12.4 83 15.1 8.8 9.5 12.0 10.2 9.5 9.9 9.8 9.5 1 2 3 0 3.1 000000 1007.1 3.2 0.0 1.7
23 8 S 1 7 60 10.6 75 13.0 8.4 5.5 9.9 9.5 9.7 10.1 9.9 9.5 1 0 3 0 2.3 000000 1005.1 5.3 0.0 0.8
24 8 SW 5 6 60 10.9 91 13.7 6.8 3.1 10.5 9.8 9.8 10.3 10.1 9.5 1 2 3 0 1.2 000000 1007.1 0.7 0.0 1.6
25 2 SW 5 7 02 10.5 75 13.1 7.5 6.7 11.7 10.0 10.0 10.8 10.5 10.0 1 0 3 0 6.3 000000 1006.3 4.5 0.0 2.1
26 6 SW 4 7 01 8.8 88 12.5 6.9 5.0 9.9 9.5 10.0 10.8 10.4 9.8 1 2 3 0 tr 000000 999.3 0.0 0.0 1.5
27 5 SW 2 7 03 11.0 71 13.5 3.6 -1.0 11.5 8.5 9.5 10.4 10.7 10.0 1 0 4 0 1.3 000000 1002.2 0.7 0.0 1.3
28 5 S 4 7 05 10.7 67 13.0 3.8 0.8 11.4 8.8 9.4 10.4 10.4 10.1 1 0 1 0 tr 000000 1001.8 0.0 0.0 1.9
29 5 N 2 7 03 12.4 72 16.5 5.0 2.0 12.4 9.8 9.8 10.4 10.5 10.0 1 0 1 0 0.1 000000 1004.2 0.0 0.0 1.3
30 6 NE 2 5 10 12.0 82 16.0 7.8 6.5 12.9 11.0 10.8 10.3 11.0 10.0 1 0 1 0 0.0 000000 1016.2 0.0 0.0 1.1
------------------------------------------------------------------------------------------------------------------------
Mean
6 8.2 80 11.9 4.7 2.4 8.6 8.0 8.6 9.6 9.8 9.6 1001.0
Total 83.3 78.0 0.0 40.7
------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1988-97 average used by the Climatological Observers Link. Rainfall was 129% of average
Air temperatures Weather (No. days occurrence) and 146% of 1961-90 average.
Mean maximum 11.9 (-0.8) Sleet/snow falling 6 (+4.8) Most in a day: 14.7 mm (8th).
Mean minimum 4.7 (-0.1) Snow lying (at 09GMT) 0 (-0.3) No. of days with:
Mean 8.3 (-0.4) Hail <5 mm 7 [+6.6] >=0.2 mm 22 (+ 6.6)
No. days <0.0C 0 (-0.9) Hail >=5 mm 0 [all hail] >=1.0 mm 17 (+ 5.5)
Mean grass min 2.4 (-0.7) Thunder heard 0 (-0.3) >=5.0 mm 5 (+ 1.1)
Lowest grass min -2.7 (+0.1) Gales 0 Lysimeter:
No. days <0.0C 8 (+2.5) Fog (at 09GMT) 0 PE 69.2 mm
PWB 14.1 mm
Highest maximum 16.5 on 29th. Lowest minimum 0.0 on 15th and 16th. PWS 34.0 mm
Minimum relative humidity: 58% on 18th. PWD -19.9 mm
* Heavy snow on the 14th up to 2 cm but had melted by 09 GMT on the 15th. Piche: 40.7 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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 05 haze, 10 mist, 25 rain
shower, 26 sleet shower, 27 hail shower, 60 intermittent slight rain, 61 continuous slight 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.
------------------------------------------------------------------------------------------------------------------------
CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR MAY 1998
------------------------------------------------------------------------------------------------------------------------
-09GMT--> -Air Temperature- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C Gr SS Rain SLHTGF Press hrs hrs Evap
------------------------------------------------------------------------------------------------------------------------
01 3 NE 4 7 05 9.5 80 14.3 6.0 4.4 9.6 9.9 11.1 12.0 11.5 10.2 0 0 1 0 0.0 000000 1023.9 0.0 0.0 1.3
02 5 N 2 5 02 11.2 89 15.5 5.5 2.3 12.8 11.0 11.1 12.2 11.8 10.2 0 0 1 0 0.0 000000 1023.1 0.0 0.0 0.9
03 2 NE 4 8 02 9.5 80 14.5 6.2 3.5 11.2 10.4 11.1 12.4 12.0 10.4 0 0 1 0 0.6 000000 1025.4 0.8 0.0 1.4
04 8 NW 1 6 20 10.8 96 17.0 5.0 2.0 12.0 11.4 11.6 12.6 12.2 10.8 1 2 3 0 2.2 000000 1022.7 5.2 0.0 0.9
05 8 SW 3 5 61 9.0 93 11.6 6.4 3.4 10.1 10.7 11.5 12.5 12.2 10.8 1 3 3 0 5.4 000000 1011.9 6.5 0.0 0.7
06 6 SW 3 7 01 10.4 83 13.6 8.8 7.3 12.0 11.0 11.0 12.2 12.0 11.0 1 1 3 0 3.0 000000 999.7 2.5 0.0 1.3
07 7 SW 7 6 02 12.2 82 14.1 10.3 9.1 12.5 11.5 11.5 12.1 12.0 11.0 1 0 3 0 1.6 0000G0 1003.0 2.6 0.0 1.7
08 7 S 4 7 01 12.5 82 16.7 10.4 9.6 13.4 12.0 11.8 12.2 12.1 11.2 1 0 1 0 0.0 000000 1014.2 0.0 0.0 1.6
09 7 S 3 5 01 10.5 94 15.6 9.7 8.4 12.7 12.7 12.7 13.2 12.5 11.0 1 0 1 0 0.0 000000 1014.6 0.0 0.0 1.7
10 7 NE 3 7 01 10.2 82 14.3 5.7 4.2 12.2 11.6 12.2 13.0 12.8 11.2 1 0 1 0 4.1 000000 1023.5 6.7 0.0 0.9
11 7 NE 2 7 01 12.5 85 17.8 9.0 8.8 13.5 12.3 12.2 13.2 12.9 11.5 1 1 3 0 tr 000000 1018.5 0.0 0.0 1.2
12 6 N 2 5 05 13.3 87 21.2 9.3 6.7 14.4 13.0 13.0 13.8 13.2 11.6 1 0 1 0 0.0 000000 1019.3 0.0 0.0 1.7
13 6 NE 1 5 05 17.2 86 24.8 11.5 9.0 17.0 14.8 14.5 15.0 14.0 11.8 0 0 1 0 2.6 000000 1021.6 2.0 0.0 1.2
14 8 NE 1 4 21 13.5 97 21.2 11.8 11.0 15.4 15.4 15.6 15.9 14.8 12.0 1 2 3 0 0.0 000T00 1024.6 0.0 0.0 0.6
15 8 N 1 5 05 13.7 93 17.2 10.2 8.2 17.0 16.0 15.6 16.3 15.1 12.2 1 0 1 0 0.0 000000 1025.7 0.0 0.0 1.7
16 8 NE 1 4 05 14.2 92 18.5 10.7 7.8 16.5 15.5 15.2 16.1 15.2 12.6 0 0 1 0 0.0 000000 1026.8 0.0 0.0 0.9
17 1 N 1 5 04 18.5 51 22.0 10.1 7.8 16.0 14.4 15.1 16.2 15.4 12.8 0 0 1 0 0.0 000000 1027.6 0.0 0.0 2.2
18 0 N 1 7 05 17.7 67 20.3 11.0 7.8 17.4 15.4 15.9 17.0 16.0 13.2 0 0 1 0 0.0 000000 1029.4 0.0 0.0 2.0
19 0 N 2 7 05 16.7 73 21.3 9.8 6.6 14.8 15.0 16.0 17.0 16.3 13.3 0 0 1 0 0.0 000000 1030.9 0.0 0.0 2.5
20 2 00 0 7 05 19.1 61 23.0 11.3 7.9 17.3 16.0 16.5 17.5 16.6 13.5 0 0 1 0 0.0 000000 1028.3 0.0 0.0 1.9
21 7 N 2 7 01 11.3 86 16.5 8.6 6.0 15.4 15.8 16.8 17.5 16.7 13.7 0 0 1 0 0.0 000000 1027.6 0.0 0.0 1.4
22 5 N 1 7 02 13.1 76 17.3 7.8 5.0 16.5 15.2 16.0 17.1 16.8 13.8 0 0 1 0 1.7 000000 1030.5 2.6 0.0 1.1
23 8 S 1 5 61 11.3 97 13.6 9.6 8.2 14.8 15.3 16.2 17.2 16.7 13.9 1 3 3 0 0.1 000000 1028.0 0.0 0.0 0.6
24 8 NE 1 6 02 11.0 91 15.4 10.1 10.1 14.1 14.2 15.0 16.1 16.1 14.0 1 0 3 0 tr 000000 1022.7 0.0 0.0 0.6
25 8 SW 1 6 20 12.3 93 16.5 10.8 10.2 14.0 14.2 14.8 15.8 15.5 14.0 0 0 3 0 tr 000000 1016.2 0.0 0.0 0.9
26 8 N 2 7 02 10.5 88 11.5 8.6 7.8 14.5 14.0 14.3 15.4 15.3 14.0 0 0 3 0 0.4 000000 1008.3 1.7 0.0 1.5
27 7 NE 2 7 01 9.4 74 12.3 6.8 4.8 12.2 11.8 12.8 14.7 15.0 13.9 0 0 3 0 2.4 000000 1010.7 0.9 0.0 1.0
28 3 N 2 5 05 12.3 80 14.2 5.6 3.2 14.4 12.2 12.5 14.4 14.6 13.8 1 0 1 0 tr 000000 1011.1 0.0 0.0 1.1
29 7 NE 2 5 20 12.3 96 18.5 10.3 8.8 13.6 13.2 13.5 14.8 14.8 13.8 0 0 3 0 0.3 000000 1011.1 0.2 0.0 1.9
30 1 NE 2 7 05 14.6 77 19.0 7.5 3.6 14.4 13.0 13.8 15.3 15.1 13.8 0 0 1 0 0.9 000000 1016.6 0.7 0.0 1.6
31 7 SE 1 7 25 13.3 92 19.8 10.7 7.8 15.2 14.5 15.0 16.0 15.5 13.8 1 2 3 0 0.0 000000 1008.3 0.0 0.0 2.2
------------------------------------------------------------------------------------------------------------------------
Mean
6 12.7 84 17.1 8.9 6.8 14.1 13.3 13.7 14.7 14.3 12.4 1019.5
Total 25.3 32.4 0.0 42.2
------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1988-97 average used by the Climatological Observers Link. Rainfall was 42% of average
Air temperatures Weather (No. days occurrence) and 41% of 1961-90 average.
Mean maximum 17.1 (+0.8) Sleet/snow falling 0 (-0.3) Most in a day: 5.4 mm (5th).
Mean minimum 8.9 (+1.6) Snow lying (at 09GMT) 0 (-0.1) No. of days with:
Mean 13.0 (+1.2) Hail <5 mm 0 [-1.1] >=0.2 mm 12 (+ 0.6)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 [all hail] >=1.0 mm 8 (- 0.5)
Mean grass min 6.8 (+1.1) Thunder heard 1 (+0.2) >=5.0 mm 1 (- 2.9)
Lowest grass min 2.0 (+1.9) Gales 1 Lysimeter:
No. days <0.0C 0 (-0.9) Fog (at 09GMT) 0 PE 84.8 mm
PWB -59.5 mm
Highest maximum 24.8C on 13th. Lowest minimum 5.0C on 4th. PWS 5.0 mm
Minimum relative humidity: 51% on 17th. PWD -64.5 mm
* Fifth driest May in records since 1928. Piche: 42.2 ml
------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
20 drizzle in past hour, 21 rain in past hour, 25 rain shower in past hour, 61 continuous 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 JUNE 1998
------------------------------------------------------------------------------------------------------------------------
-09GMT--> -Air Temperature- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C Gr SS Rain SLHTGF Press hrs hrs Evap
------------------------------------------------------------------------------------------------------------------------
01 7 SW 1 7 02 15.5 70 16.7 8.7 5.5 14.8 14.4 15.0 16.0 15.7 13.9 0 0 1 0 14.3 000t00 1010.7 4.7 0.0 0.9
02 8 NE 3 5 63 9.5 100 10.5 9.5 9.5 12.5 13.5 14.8 15.5 15.3 13.8 1 3 3 0 16.9 000000 1005.5 11.8 0.0 0.6
03 8 NE 1 5 52 10.5 97 13.5 9.4 9.4 12.0 12.0 13.0 14.3 14.5 13.9 1 3 3 0 0.3 000000 1006.3 2.0 0.0 0.7
04 1 S 2 7 02 13.5 66 17.7 5.5 2.7 14.4 11.9 12.0 13.7 14.1 13.9 1 0 1 0 0.0 000000 1020.4 0.0 0.0 1.7
05 7 S 1 7 02 14.0 62 19.9 9.2 5.9 14.1 13.3 13.5 14.7 14.8 13.8 1 0 1 0 6.6 000000 1018.1 3.9 0.0 1.8
06 8 00 0 6 92 13.8 98 17.0 12.7 10.9 15.0 14.9 15.0 15.7 15.0 13.8 1 3 3 0 1.4 000t000 1007.9 2.7 0.0 0.8
07 7 W 2 6 01 14.4 86 16.3 10.6 9.0 15.5 14.3 14.3 15.2 15.0 13.9 1 0 3 0 0.2 000000 1005.9 1.0 0.0 1.0
08 8 SW 3 6 60 13.1 86 14.2 8.9 5.7 14.4 13.5 14.0 15.3 15.2 13.9 1 1 3 0 23.1 000000 1009.5 10.7 0.0 0.6
09 6 SW 8 6 02 14.2 84 16.5 11.9 11.3 14.8 14.2 14.1 15.0 15.0 14.0 1 0 3 0 2.0 0000G0 994.2 1.3 0.0 1.8
10 7 SW 4 6 01 12.5 85 16.3 10.5 9.6 14.0 13.8 14.1 15.2 15.0 13.9 1 0 3 0 7.3 000000 998.5 10.3 0.0 1.3
11 5 NE 4 7 01 9.4 75 14.2 7.1 6.6 11.3 11.9 13.5 15.2 15.1 14.0 1 0 3 0 0.0 000000 1013.5 0.0 0.0 1.8
12 5 W 2 7 01 11.7 62 15.2 4.0 2.1 11.0 11.5 13.4 15.0 15.1 14.0 1 0 1 0 3.1 000000 1020.1 6.8 0.0 1.9
13 8 SW 1 5 63 11.9 93 15.7 8.8 7.0 14.0 13.8 14.2 15.2 15.1 14.0 1 3 3 0 28.6 000000 1006.3 6.4 0.0 0.3
14 8 N 2 6 02 11.3 96 12.3 10.7 10.2 13.9 13.8 14.2 15.1 15.1 14.0 1 1 3 0 tr 000000 1007.9 0.0 0.0 1.2
15 8 N 3 7 02 11.1 84 11.3 9.8 9.8 13.9 13.3 13.5 14.8 14.9 14.0 1 0 0 0 4.8 000000 1013.5 7.2 0.0 0.4
16 7 NE 2 6 10 11.3 94 17.6 10.0 9.8 13.6 13.0 13.2 14.4 14.9 14.0 1 1 3 0 1.1 000000 1020.8 3.8 0.0 1.3
17 8 S 2 5 61 12.6 99 14.3 10.0 8.2 14.4 14.0 14.3 15.3 15.2 14.0 1 3 3 0 31.5 000000 1023.9 14.3 0.0 0.4
18 8 S 3 2 61 13.9 99 17.0 11.7 11.3 14.5 14.3 14.3 15.1 15.1 14.0 1 3 3 0 1.2 00000F 1018.9 1.9 0.0 0.3
19 6 SW 4 7 01 17.0 86 23.3 13.1 13.0 16.1 15.1 14.6 15.3 15.2 14.0 1 0 3 0 0.0 000000 1020.4 0.0 0.0 3.8
20 7 S 5 7 05 21.7 63 24.1 12.4 10.6 18.6 16.7 16.2 16.8 16.0 14.0 0 0 1 0 0.7 000000 1017.4 1.8 0.0 2.2
21 5 SW 3 7 01 15.8 76 18.5 13.8 12.3 16.5 16.0 16.8 17.4 16.5 14.2 0 0 1 0 0.2 000000 1016.6 0.5 0.0 2.3
22 6 SW 3 7 05 13.7 82 16.5 11.5 10.0 16.5 16.0 16.5 17.4 16.7 14.5 0 0 1 0 10.6 000000 1020.4 8.2 0.0 1.7
23 7 SW 6 7 02 15.2 86 17.8 12.1 11.8 16.5 16.0 16.0 16.9 16.5 14.8 1 1 3 0 18.3 000000 1016.2 14.9 0.0 1.0
24 8 SW 1 5 63 13.8 99 17.5 13.8 13.5 16.0 16.0 16.1 16.8 16.5 14.8 1 3 3 0 3.4 000000 1008.7 2.2 0.0 1.4
25 5 SW 4 7 02 14.4 79 17.5 11.1 9.9 15.3 15.1 16.0 17.0 16.1 14.8 1 0 1 0 0.8 000000 1009.5 3.3 0.0 2.2
26 8 S 2 6 61 13.0 94 16.3 11.6 10.6 15.8 15.5 16.0 17.1 16.7 14.8 1 3 3 0 5.3 000000 1005.9 3.0 0.0 1.4
27 7 SW 3 7 02 13.4 88 17.5 10.5 7.8 15.0 14.7 15.1 16.5 16.6 15.0 1 1 3 0 0.0 004000 1003.0 0.0 0.0 1.5
28 6 W 4 7 01 14.0 84 18.0 9.3 7.1 15.5 15.0 15.5 16.8 16.6 15.0 1 0 1 0 0.4 000000 1013.5 0.6 0.0 1.4
29 7 W 2 7 02 13.8 81 16.5 11.5 10.7 15.5 15.0 15.7 17.0 16.6 15.0 1 0 1 0 0.2 000000 1015.8 1.0 0.0 1.2
30 8 S 1 5 51 12.7 95 16.5 10.6 8.6 15.0 15.0 15.5 16.8 16.6 15.0 1 3 3 0 0.6 000000 1015.0 0.3 0.0 0.7
------------------------------------------------------------------------------------------------------------------------
Mean
7 13.4 85 16.5 10.3 9.0 14.7 14.3 14.7 15.8 15.6 14.2 1012.1
Total 182.9 124.6 0.0 39.6
------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1988-97 average used by the Climatological Observers Link. Rainfall was 312% of average
Air temperatures Weather (No. days occurrence) and 270% of 1961-90 average.
Mean maximum 16.5 (-1.4) Sleet/snow falling 0 ( 0.0) Most in a day: 31.5 mm (17th).
Mean minimum 10.3 (+0.7) Snow lying (at 09GMT) 0 ( 0.0) No. of days with:
Mean 13.4 (-0.4) Hail <5 mm 1 [+0.9] >=0.2 mm 25 (+11.5)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 [all hail] >=1.0 mm 17 (+ 7.7)
Mean grass min 9.0 (+0.9) Thunder heard 2 (+1.3) >=5.0 mm 10 (+ 6.3)
Lowest grass min 2.1 (-1.0) Gales 1 Lysimeter:
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 1 PE 87.0 mm
PWB 95.9 mm
Highest maximum 24.1C on 20th. Lowest minimum 4.0C on 12th. PWS 119.8 mm
Minimum relative humidity: 44% on 19th PWD -23.9 mm
* Second wettest June in records since 1928. Only 1935 with 196 mm was wetter. Piche: 39.6 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, 05 haze, 10 mist, 51 continuous
slight drizzle, 52 intermittent moderate drizzle, 60 int. slight rain, 61 continuous slight rain, 63 cont. moderate
rain, 92 moderate/heavy rain with thunder in past hour.
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 1998
------------------------------------------------------------------------------------------------------------------------
-09GMT--> -Air Temperature- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C Gr SS Rain SLHTGF Press hrs hrs Evap
------------------------------------------------------------------------------------------------------------------------
01 2 NE 3 7 02 15.6 78 19.5 10.8 8.9 14.5 14.3 15.1 16.5 16.5 15.0 1 0 1 0 0.0 000000 1018.1 0.0 0.0 1.4
02 7 NE 2 7 01 14.5 80 18.2 12.4 10.9 17.0 16.4 16.1 17.5 17.0 15.1 0 0 1 0 0.0 000000 1022.3 0.0 0.0 1.2
03 8 NE 1 6 02 12.7 86 16.6 11.6 10.6 16.5 16.6 17.2 18.0 17.4 15.1 0 0 1 0 0.1 000000 1025.0 0.0 0.0 0.9
04 8 NW 1 5 50 13.8 91 17.3 12.5 12.2 16.5 16.4 16.8 17.6 17.3 15.3 0 1 3 0 tr 000000 1026.8 0.0 0.0 1.1
05 8 W 3 7 02 13.7 89 16.2 13.5 12.3 15.5 15.7 16.2 17.2 17.2 15.4 0 0 1 0 tr 000000 1022.0 0.0 0.0 0.7
06 7 N 1 7 20 13.2 87 16.7 11.6 11.7 16.5 15.8 16.0 16.8 16.8 15.3 0 0 1 0 0.0 000000 1017.4 0.0 0.0 1.0
07 7 N 3 7 02 12.9 84 16.7 10.5 8.9 16.0 15.9 16.3 17.1 16.9 15.3 0 0 1 0 tr 000000 1018.1 0.0 0.0 1.4
08 8 W 4 7 20 13.5 89 17.0 11.4 9.6 15.3 15.5 16.3 17.2 17.0 15.3 0 0 3 0 3.7 000000 1018.9 5.0 0.0 1.1
09 8 N 1 5 02 14.8 96 16.2 12.9 12.6 16.6 16.0 16.0 17.0 16.8 15.4 1 2 3 0 tr 000000 1013.5 0.0 0.0 0.6
10 7 W 2 5 01 14.4 90 17.6 11.7 10.2 16.1 15.7 15.9 16.9 16.7 15.4 1 0 3 0 3.9 000000 1012.7 0.3 0.0 1.4
11 8 SW 3 6 10 14.3 80 15.4 10.7 9.2 16.0 15.5 15.9 16.9 16.8 15.5 1 0 3 0 3.0 000000 1010.3 9.5 0.0 0.8
12 8 S 7 5 61 15.4 100 17.5 12.8 11.3 16.0 15.7 15.9 16.6 16.5 15.4 1 3 3 0 0.4 000000 995.9 0.5 0.0 1.4
13 6 NW 3 7 02 13.0 80 15.7 8.8 7.1 13.2 13.2 14.5 15.9 16.5 15.5 1 0 1 0 1.3 000000 1007.1 1.3 0.0 1.4
14 8 W 2 6 02 14.0 85 15.6 10.1 8.7 15.0 14.3 14.5 15.9 16.3 15.3 1 0 3 0 1.4 000000 1013.5 2.4 0.0 0.9
15 7 W 1 7 01 13.4 84 18.2 11.2 10.1 14.9 14.2 14.5 15.7 15.8 15.4 1 1 3 0 0.0 000000 1012.7 0.0 0.0 2.0
16 6 SW 2 7 03 16.5 78 20.1 12.3 10.8 16.0 15.0 15.3 16.4 16.2 15.2 0 0 1 0 13.6 000000 1011.9 6.5 0.0 2.1
17 5 W 3 7 01 13.5 89 17.5 11.5 11.1 16.6 15.7 16.1 17.3 16.9 15.2 1 1 3 0 0.3 000000 1007.1 1.1 0.0 1.8
18 7 W 5 7 01 14.0 80 18.0 10.6 8.8 15.0 14.6 15.5 16.9 16.8 15.2 1 0 3 0 1.9 000000 1009.1 3.0 0.0 1.9
19 7 SW 3 7 01 14.5 91 18.8 12.5 11.4 16.0 15.6 16.0 17.0 16.8 15.3 1 2 3 0 1.0 000000 1009.9 1.7 0.0 2.0
20 8 S 4 7 02 17.3 93 18.0 14.5 15.0 17.5 16.8 16.6 17.2 16.8 15.3 1 2 3 0 2.5 000000 1004.2 3.7 0.0 1.1
21 7 SW 5 6 02 14.2 87 16.5 13.0 11.8 15.4 15.3 16.0 16.9 16.9 15.3 1 0 3 0 1.3 000000 1003.0 3.0 0.0 1.8
22 5 SW 3 7 02 16.1 72 18.3 12.0 10.4 15.8 14.8 15.5 16.6 16.6 15.5 1 0 3 0 14.6 000000 1011.5 6.2 0.0 1.0
23 7 NW 3 7 02 13.5 92 16.7 12.6 12.8 15.5 15.3 15.8 16.7 16.7 15.5 1 2 3 0 tr 000000 1010.3 0.0 0.0 1.1
24 8 NW 1 6 02 13.5 87 19.2 9.1 5.4 14.5 14.5 15.2 16.5 16.5 15.4 1 0 1 0 0.0 000000 1024.2 0.0 0.0 1.7
25 6 SW 2 7 01 16.2 72 19.3 9.7 5.5 16.0 14.5 15.2 16.5 16.8 15.3 1 0 1 0 0.6 000000 1025.0 2.1 0.0 2.3
26 8 S 2 5 61 13.2 93 15.2 12.5 11.0 15.0 15.2 16.0 16.8 16.7 15.4 1 3 3 0 2.8 000000 1015.4 5.8 0.0 0.4
27 8 SW 1 5 20 14.6 98 19.2 12.9 11.6 16.0 15.5 15.7 16.4 16.5 15.4 1 3 3 0 0.2 000000 1013.5 0.2 0.0 1.2
28 8 SW 2 7 05 16.3 83 17.3 13.4 12.9 17.9 16.5 16.3 17.0 16.5 15.5 1 0 3 0 4.0 000000 1011.5 5.9 0.0 0.6
29 8 W 3 5 02 14.0 95 17.2 13.1 12.8 15.6 15.6 16.1 17.0 16.8 15.3 1 2 3 0 0.4 000000 1005.9 0.9 0.0 1.1
30 8 W 2 5 61 13.5 94 18.1 12.9 11.2 15.0 15.0 15.6 16.8 16.8 15.4 1 3 3 0 5.6 000000 1004.6 6.3 0.0 0.8
31 8 NW 1 6 61 12.9 98 18.5 12.2 11.9 15.2 15.4 16.0 16.9 16.8 15.4 1 2 3 0 0.2 000000 1014.2 1.2 0.0 0.6
------------------------------------------------------------------------------------------------------------------------
Mean
7 14.3 87 17.5 11.8 10.6 15.8 15.4 15.8 16.8 16.7 15.3 1013.4
Total 62.8 66.6 0.0 38.8
------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1988-97 average used by the Climatological Observers Link. Rainfall was 103% of average
Air temperatures Weather (No. days occurrence) and 85% of the 1961-90 average.
Mean maximum 17.5 (-2.4) Sleet/snow falling 0 ( 0.0) Most in a day: 14.6 mm (22nd).
Mean minimum 11.8 (-0.1) Snow lying (at 09GMT) 0 ( 0.0) No. of days with:
Mean 14.7 (-1.2) Hail <5 mm 0 [-0.1] >=0.2 mm 20 (+ 5.4)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 [all hail] >=1.0 mm 14 (+ 4.1)
Mean grass min 10.6 (+0.3) Thunder heard 0 (-0.6) >=5.0 mm 3 (- 1.3)
Lowest grass min 5.4 (-0.2) Gales 0 Lysimeter:
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 0 PE 62.9 mm
PWB -0.1 mm
Highest maximum 20.1C on 16th. Lowest minimum 8.8C on 13th. PWS 24.5 mm
Minimum relative humidity: 64% on 15th, 16th and 25th. PWD -24.7 mm
* July mean maximum lowest since 1981. Lowest absolute maximum in July on 20-year record. Piche: 39.8 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, 05 haze, 10 mist, 20 drizzle
in past hour, 50 slight drizzle, 61 continuous 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 1998
------------------------------------------------------------------------------------------------------------------------
-09GMT--> -Air Temperature- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C Gr SS Rain SLHTGF Press hrs hrs Evap
------------------------------------------------------------------------------------------------------------------------
01 8 N 1 7 02 13.5 90 18.5 10.4 7.0 15.4 15.0 15.5 16.7 16.6 15.5 1 0 1 0 0.1 000000 1020.1 0.0 0.0 0.9
02 6 SW 1 7 01 15.4 87 19.9 11.5 8.1 15.6 15.0 15.5 16.8 16.8 15.5 1 0 1 0 10.4 000000 1024.6 8.5 0.0 1.7
03 8 SW 6 5 63 14.3 98 17.6 12.3 11.6 14.8 15.1 16.0 16.8 16.8 15.5 1 3 3 0 6.9 000000 1013.5 4.0 0.0 1.0
04 5 W 4 7 02 16.1 79 19.6 9.8 7.4 15.5 14.5 15.0 16.2 16.5 15.5 1 0 1 0 0.0 000000 1026.8 0.0 0.0 2.1
05 8 W 1 6 02 13.9 85 19.5 13.0 11.4 15.0 15.5 16.0 16.9 16.6 15.5 1 0 1 0 0.0 000000 1033.1 0.0 0.0 2.0
06 6 SW 5 7 03 15.6 82 18.1 13.0 11.7 16.3 15.6 16.1 17.0 17.0 15.7 0 0 0 0 0.5 000000 1026.8 2.3 0.0 1.3
07 8 SW 4 6 02 16.9 94 18.8 14.8 13.9 18.0 17.2 17.0 17.3 17.0 15.7 1 1 3 0 tr 000000 1025.0 0.0 0.0 1.4
08 5 S 4 7 02 18.8 81 23.0 13.4 11.9 17.3 16.0 16.2 17.0 17.0 15.9 0 0 1 0 0.0 000000 1021.6 0.0 0.0 1.7
09 0 SE 1 7 04 22.3 75 27.9 14.5 12.2 19.0 17.5 17.5 18.0 17.6 15.8 0 0 1 0 0.0 000000 1021.2 0.0 0.0 2.1
10 7 S 1 7 05 20.8 82 22.5 17.3 15.0 21.5 19.8 19.2 19.3 18.2 15.9 0 0 1 0 tr 000000 1018.1 0.0 0.0 1.2
11 1 SW 1 7 05 19.2 81 21.2 13.7 11.1 18.5 17.4 18.0 18.8 18.5 16.2 0 0 1 0 0.8 000000 1020.1 1.8 0.0 1.8
12 8 NW 3 7 02 14.3 86 19.8 12.5 11.4 16.5 17.0 18.0 18.8 18.3 16.2 1 0 3 0 tr 000000 1018.5 0.0 0.0 1.8
13 8 W 3 6 60 14.0 85 17.0 10.1 7.3 15.6 15.8 17.0 18.0 18.0 16.3 0 1 3 0 2.1 000000 1020.1 3.3 0.0 0.6
14 7 SW 4 6 03 17.0 93 17.2 12.3 12.5 17.0 16.5 16.6 17.3 17.5 16.3 1 2 3 0 1.6 000000 1012.7 2.4 0.0 0.6
15 5 NW 2 7 03 14.8 86 19.5 9.0 5.9 15.4 14.2 15.4 16.8 17.1 16.1 1 1 1 0 0.0 000000 1018.9 0.0 0.0 2.1
16 6 SW 4 7 02 15.5 76 17.6 12.6 11.6 16.5 15.8 16.5 17.3 17.2 16.2 0 0 0 0 2.5 000000 1022.0 2.5 0.0 2.1
17 7 W 4 7 01 15.8 89 20.7 14.5 13.5 17.1 16.4 16.5 17.0 17.1 16.1 1 1 3 0 0.1 000000 1016.2 0.0 0.0 1.8
18 6 N 2 7 05 14.5 83 18.4 10.0 7.8 16.0 15.3 16.5 17.4 17.2 16.0 0 0 1 0 0.0 000000 1023.9 0.0 0.0 1.8
19 1 SW 4 7 05 16.3 81 18.6 10.3 7.7 15.7 15.0 16.2 17.4 17.5 16.1 0 0 1 0 0.0 000000 1023.1 0.0 0.0 1.8
20 8 SW 5 6 05 14.8 87 15.6 12.4 11.2 15.8 15.6 16.5 17.2 17.3 16.3 0 0 0 0 13.0 000000 1016.2 13.5 0.0 1.0
21 8 NW 2 7 20 13.1 95 17.8 12.6 12.7 15.6 15.5 16.0 16.6 16.9 16.1 1 2 3 0 0.0 000000 1007.5 0.0 0.0 1.0
22 7 NW 2 6 10 13.0 88 19.0 10.5 9.1 14.5 14.4 15.2 16.5 16.8 16.1 1 0 1 0 6.2 000000 1012.7 7.5 0.0 1.2
23 8 SW 2 5 63 15.0 97 18.2 10.9 8.2 15.0 15.0 15.5 16.5 16.5 15.9 1 3 3 0 13.1 000T00 1008.3 7.0 0.0 0.4
24 6 N 2 7 01 13.6 84 19.0 11.7 10.0 15.2 14.8 15.4 16.3 16.6 16.0 1 0 3 0 0.5 000000 1017.0 1.6 0.0 1.4
25 8 S 4 7 61 14.5 92 15.8 9.3 6.4 15.0 15.0 15.5 16.6 16.7 16.0 1 3 3 0 10.1 000000 1019.3 9.4 0.0 0.1
26 8 NE 1 7 50 12.6 98 16.6 12.4 12.4 15.1 15.2 15.8 16.4 16.5 15.9 1 2 3 0 tr 000000 1020.4 0.0 0.0 1.1
27 4 NE 1 7 03 13.2 88 17.2 8.0 4.5 12.8 13.2 15.0 16.4 16.6 16.0 1 0 1 0 0.0 000000 1026.8 0.0 0.0 1.0
28 7 NW 1 7 03 14.8 80 17.9 11.2 10.6 16.0 15.3 15.8 16.6 16.6 15.8 1 0 1 0 tr 000000 1026.5 0.0 0.0 1.0
29 1 00 0 7 02 14.9 74 19.6 9.5 7.6 14.2 14.0 15.0 16.5 16.8 15.9 1 0 1 0 0.0 000000 1026.5 0.0 0.0 1.2
30 4 SE 1 7 05 16.1 73 22.6 10.5 7.8 15.0 14.2 15.5 16.6 16.7 15.9 0 0 1 0 0.0 000000 1022.0 0.0 0.0 2.3
31 7 SE 1 7 03 18.2 77 19.6 12.6 9.8 17.0 16.0 15.0 17.0 16.8 15.9 0 0 1 0 2.0 000000 1015.4 4.5 0.0 1.5
------------------------------------------------------------------------------------------------------------------------
Mean
6 15.6 85 19.2 11.8 10.0 16.1 15.6 16.2 17.1 17.1 15.9 1020.2
Total 69.9 68.3 0.0 43.0
------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1988-97 average used by the Climatological Observers Link. Rainfall was 95% of average
Air temperatures Weather (No. days occurrence) and 77% of 1961-90 average.
Mean maximum 19.2 (-0.5) Sleet/snow falling 0 ( 0.0) Most in a day: 13.1 mm on 23rd.
Mean minimum 11.8 (-0.2) Snow lying (at 09GMT) 0 ( 0.0) No. of days with:
Mean 15.5 (-0.3) Hail <5 mm 0 [ 0.0] >=0.2 mm 13 (- 1.9)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 [all hail] >=1.0 mm 10 (- 0.7)
Mean grass min 10.0 (-0.3) Thunder heard 1 (+0.4) >=5.0 mm 6 (+ 0.9)
Lowest grass min 4.5 (-1.2) Gales 0 Lysimeter:
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 0 PE 69.3 mm
PWB 0.6 mm
Highest maximum 27.9C on 9th. Lowest minimum 8.0C on 27th. PWS 33.9 mm
Minimum relative humidity: 51% on 9th PWD -33.3 mm
* Piche: 43.0 ml
------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
10 mist, 20 drizzle in past hour, 50 intermittent slight drizzle, 60 int. 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 SEPTEMBER 1998
------------------------------------------------------------------------------------------------------------------------
-09GMT--> -Air Temperature- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C Gr SS Rain SLHTGF Press hrs hrs Evap
------------------------------------------------------------------------------------------------------------------------
01 8 S 1 5 81 16.3 99 20.4 14.7 13.9 16.0 16.2 16.5 17.0 16.9 16.0 1 3 3 0 12.8 000t00 1010.3 2.0 0.0 1.2
02 7 S 1 7 03 15.5 87 19.2 12.4 8.7 14.5 14.3 16.0 17.0 16.9 15.9 1 0 1 0 2.3 000000 1015.4 2.3 0.0 0.7
03 8 N 1 5 02 14.5 96 17.7 12.6 10.0 16.0 16.0 16.4 17.1 17.0 16.0 1 1 3 0 0.0 000000 1016.6 0.0 0.0 0.9
04 7 00 0 7 01 14.5 87 20.1 9.3 7.8 14.6 14.2 15.3 16.5 16.8 15.9 1 0 1 0 7.8 000000 1009.5 6.9 0.0 1.0
05 5 00 0 7 03 15.2 95 20.0 12.9 12.3 15.5 15.3 16.0 16.7 16.8 15.9 1 2 3 0 tr 000000 1003.0 0.0 0.0 0.9
06 8 SE 1 7 02 15.3 90 20.2 13.0 10.1 15.6 15.4 15.8 16.7 16.8 16.0 1 0 1 0 0.6 000000 1005.5 0.8 0.0 2.7
07 4 SE 3 6 02 18.0 66 20.8 15.0 11.9 15.0 14.8 15.6 16.7 16.8 16.0 1 0 1 0 5.4 000000 997.2 2.6 0.0 2.0
08 3 SW 4 7 02 15.7 87 18.5 14.1 12.8 15.0 15.3 16.0 16.8 16.7 15.9 1 1 3 0 9.0 000000 996.4 5.2 0.0 1.6
09 7 SW 5 6 20 15.5 91 16.7 13.7 12.9 16.0 15.7 16.0 16.8 16.7 15.9 1 2 3 0 6.4 000t00 987.8 6.5 0.0 0.6
10 8 SW 2 5 61 12.5 98 13.5 12.4 12.5 14.5 15.0 15.5 16.4 16.6 15.9 1 3 3 0 6.9 000000 995.5 10.0 0.0 0.6
11 7 NW 2 7 02 11.3 93 16.6 8.6 6.9 12.2 12.6 14.0 15.7 16.2 15.9 1 2 3 0 4.6 000000 1002.2 3.0 0.0 0.8
12 7 NW 4 5 80 9.3 85 13.7 6.6 3.8 11.0 11.5 13.4 15.2 15.9 15.9 1 3 3 0 13.5 004000 998.9 4.7 0.0 1.4
13 1 N 3 7 02 11.5 82 15.9 8.2 6.6 11.3 11.5 12.6 14.8 15.4 15.8 1 1 1 0 1.8 000000 1004.2 3.0 0.0 0.9
14 7 N 2 7 02 12.2 88 16.0 7.6 5.2 12.1 11.9 13.0 14.4 15.2 15.5 1 2 3 0 0.4 000000 1005.9 1.8 0.0 1.0
15 8 SW 2 5 50 11.7 98 15.5 7.6 5.3 11.8 12.1 13.1 14.5 15.1 15.3 1 3 3 0 1.1 000000 1004.2 2.1 0.0 0.6
16 7 NW 3 5 80 10.6 92 15.2 8.5 6.5 11.5 11.7 12.8 14.2 14.9 15.2 1 3 3 0 0.1 000000 1010.7 0.0 0.0 1.3
17 7 W 1 7 01 12.4 83 16.0 8.8 6.3 12.0 12.1 12.9 14.1 14.8 15.0 1 0 1 0 2.9 000000 1017.4 5.1 0.0 1.3
18 8 S 4 4 80 15.5 100 20.0 12.2 12.8 15.0 14.6 14.5 14.9 14.9 15.0 1 3 3 0 1.0 000000 1018.9 1.2 0.0 0.5
19 7 00 0 7 03 14.6 90 17.2 10.1 6.2 13.1 12.9 13.8 14.7 15.1 15.0 1 0 1 0 0.0 000000 1029.4 0.0 0.0 0.5
20 0 NE 1 7 05 16.5 90 23.5 11.9 8.5 12.5 12.8 13.9 14.5 14.9 15.0 1 0 1 0 0.0 000000 1034.5 0.0 0.0 1.2
21 3 NE 1 7 01 16.6 87 23.0 13.5 10.0 13.6 14.0 14.8 15.2 15.2 14.8 1 0 1 0 0.0 000000 1035.2 0.0 0.0 1.0
22 0 NE 1 5 05 14.3 94 21.8 10.4 6.4 12.5 13.0 14.3 15.1 15.3 14.9 1 0 1 0 0.0 000000 1031.3 0.0 0.0 1.4
23 0 SE 2 5 04 13.7 87 20.6 8.8 5.9 11.8 12.5 13.9 14.8 15.2 14.9 1 0 1 0 0.0 000000 1025.0 0.0 0.0 1.6
24 7 SE 3 6 05 15.3 81 20.4 11.4 8.8 13.7 13.5 14.2 15.0 15.2 14.9 1 0 1 0 0.0 000000 1018.1 0.0 0.0 1.1
25 7 E 2 5 05 14.7 89 20.0 12.0 10.0 14.0 14.0 14.6 15.1 15.3 15.0 1 0 1 0 tr 000000 1012.7 0.0 0.0 0.8
26 8 E 2 5 20 13.3 95 17.1 12.4 9.9 14.4 14.5 15.0 15.3 15.4 14.9 1 1 3 0 2.7 000000 1005.5 2.6 0.0 0.5
27 3 E 2 5 03 13.5 94 15.9 12.3 11.1 13.2 13.8 14.7 15.3 15.3 14.9 1 2 3 0 0.3 000000 1001.8 0.4 0.0 0.4
28 8 NW 1 5 10 13.5 97 16.5 13.1 12.4 14.5 14.5 14.8 15.2 15.3 14.9 1 2 3 0 0.0 000000 1007.9 0.0 0.0 0.7
29 1 00 0 7 02 11.9 83 18.0 8.2 5.0 11.0 12.0 13.7 14.8 15.2 14.9 1 0 1 0 6.2 000000 1007.5 7.9 0.0 1.0
30 8 NE 5 5 62 13.5 97 15.4 11.4 10.6 13.1 13.4 13.9 14.8 14.9 14.9 1 3 3 0 4.1 000000 996.8 4.6 0.0 0.2
------------------------------------------------------------------------------------------------------------------------
Mean
6 14.0 90 18.2 11.1 9.0 13.6 13.7 14.6 15.5 15.8 15.4 1010.2
Total 89.9 72.7 0.0 30.4
------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1988-97 average used by the Climatological Observers Link. Rainfall was 120% of average
Air temperatures Weather (No. days occurrence) and was 98% of the 1961-90 aver
Mean maximum 18.2 (+1.2) Sleet/snow falling 0 ( 0.0) Most in a day: 13.5 mm (12th).
Mean minimum 11.1 (+1.4) Snow lying (at 09GMT) 0 ( 0.0) No. of days with:
Mean 14.7 (+1.3) Hail <5 mm 1 [+0.6] >=0.2 mm 19 (+ 5.5)
No. days <0.0C 0 ( 0.0) Hail >=5 mm 0 [all hail] >=1.0 mm 16 (+ 5.4)
Mean grass min 9.0 (+1.1) Thunder heard 2 (+1.6) >=5.0 mm 8 (+ 3.2)
Lowest grass min 3.8 (+1.1) Gales 0 Lysimeter:
No. days <0.0C 0 ( 0.0) Fog (at 09GMT) 0 PE 58.6 mm
PWB 31.3 mm
Highest maximum 23.5C on 20th. Lowest minimum 6.6C on 12th. PWS 42.6 mm
Minimum relative humidity: 58% on 22nd. PWD -11.2 mm
* Warmest September on 20-year record (mean and min). Max equal to 1996 and -0.2 on 1991. Piche: 30.4 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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
10 mist, 20 drizzle in past hour, 50 slight drizzle, 61 continuous slight rain, 62 continuous moderate 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 OCTOBER 1998
------------------------------------------------------------------------------------------------------------------------
-09GMT--> -Air Temperature- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C Gr SS Rain SLHTGF Press hrs hrs Evap
------------------------------------------------------------------------------------------------------------------------
01 7 NE 3 5 80 14.0 94 15.2 11.1 9.6 13.0 13.0 13.5 14.3 14.8 14.9 1 3 3 0 0.4 000000 1004.6 1.0 0.0 0.6
02 6 E 3 6 01 12.3 88 15.5 11.6 10.3 12.7 12.8 13.5 14.2 14.7 14.8 1 1 1 0 0.0 000000 1017.8 0.0 0.0 1.2
03 3 NE 1 7 05 8.8 82 14.2 4.8 1.8 9.5 10.6 12.5 13.8 14.5 14.7 1 0 1 0 0.0 000000 1018.5 0.0 0.0 1.2
04 7 NE 1 6 02 10.3 87 13.5 7.5 4.9 11.0 11.3 12.3 13.3 14.2 14.7 1 0 1 0 3.3 000000 1012.3 2.0 0.0 1.5
05 8 E 2 5 81 8.8 96 13.7 8.8 8.8 10.2 10.8 12.0 13.0 13.7 14.4 1 3 3 0 1.4 000000 1015.8 1.2 0.0 1.1
06 7 NE 3 6 02 11.0 87 13.5 8.5 8.0 11.0 11.2 12.0 12.9 13.6 14.3 1 1 1 0 0.0 000000 1021.2 0.0 0.0 0.9
07 3 NE 1 7 05 9.8 89 14.5 5.5 2.1 8.7 8.5 9.3 12.5 13.5 14.2 1 0 1 0 0.0 000000 1025.4 0.0 0.0 1.4
08 2 NE 2 7 02 10.5 81 14.2 8.0 5.1 9.0 9.5 11.0 12.2 13.2 14.0 1 0 1 0 0.0 000000 1033.4 0.0 0.0 1.6
09 7 SW 5 5 02 12.5 86 14.5 5.4 1.2 10.1 9.8 10.8 11.9 12.8 13.9 1 0 0 0 10.7 000000 1021.2 4.8 0.0 0.4
10 7 NW 3 7 02 10.5 94 13.4 8.6 5.3 10.2 10.6 11.5 12.0 12.8 13.8 1 2 3 0 12.0 000000 1013.5 7.8 0.0 0.6
11 5 W 3 7 10 10.8 90 14.1 10.0 8.4 11.3 11.6 12.0 12.3 12.8 13.8 1 2 3 0 1.3 000000 1011.1 1.0 0.0 1.6
12 5 N 3 6 02 10.0 84 15.5 8.3 5.6 10.0 10.3 11.2 12.2 12.8 13.5 1 0 1 0 2.9 000000 1018.1 5.0 0.0 1.1
13 8 SW 4 6 21 14.2 98 15.2 8.8 6.6 12.1 11.7 11.7 12.3 12.8 13.5 1 3 3 0 15.8 000000 1011.1 9.8 0.0 0.1
14 4 NW 4 7 80 11.7 98 15.0 11.1 10.0 12.7 13.0 13.1 13.0 13.2 13.5 1 2 3 0 0.3 000000 1015.0 0.4 0.0 1.5
15 7 W 2 7 10 10.5 85 14.9 8.4 6.2 10.1 10.7 11.9 12.8 13.2 13.4 1 2 3 0 6.1 000000 1020.8 2.0 0.0 1.4
16 8 SW 6 5 63 13.4 93 15.3 7.5 4.0 11.0 10.8 11.5 12.1 12.9 13.4 1 3 3 0 8.7 0000G0 1002.2 5.0 0.0 0.8
17 8 W 6 5 81 9.0 80 9.2 8.7 7.3 9.5 10.3 11.5 12.3 12.9 13.5 1 3 3 0 4.3 0000G0 993.8 5.2 0.0 0.7
18 6 SW 1 7 01 6.2 83 11.6 2.5 -0.9 5.4 7.0 9.5 11.0 12.3 13.2 1 1 4 0 8.3 000000 1018.5 4.0 0.0 0.8
19 1 NW 2 7 02 6.0 94 13.0 4.0 0.6 6.2 7.4 9.2 10.3 11.8 13.0 1 2 1 0 3.9 000000 1017.0 2.5 0.0 0.7
20 8 S 1 7 02 8.2 92 14.3 5.5 2.1 7.8 8.3 9.3 9.9 11.5 12.9 1 2 3 0 16.2 0000G0 1017.4 8.0 0.0 1.6
21 7 SW 5 5 02 13.9 90 15.5 8.2 8.1 12.5 11.8 11.0 11.2 11.5 12.8 1 2 3 0 1.2 0000G0 999.7 1.3 0.0 0.5
22 7 S 5 5 02 14.1 91 15.6 13.6 12.8 13.2 12.8 12.5 12.2 12.2 12.5 1 2 3 0 16.3 000000 1006.3 8.2 0.0 1.2
23 7 SW 1 7 02 10.5 86 13.1 10.0 8.2 11.5 12.0 12.5 12.5 12.5 12.6 1 2 3 0 2.6 000000 1003.4 5.1 0.0 1.1
24 8 S 8 5 63 11.5 90 13.1 5.5 2.1 10.1 10.2 11.0 11.8 12.5 12.8 1 3 3 0 12.9 0000G0 987.4 8.9 0.0 1.4
25 7 NW 4 7 80 8.1 79 10.5 7.4 5.7 8.5 9.3 10.5 11.4 11.9 12.8 1 2 3 0 0.9 000000 995.9 2.5 0.0 0.8
26 6 NW 3 7 03 7.9 87 13.1 5.7 2.0 6.5 8.0 9.5 10.7 11.8 12.7 1 1 1 0 11.4 000000 1006.3 6.2 0.0 1.4
27 8 SW 5 5 21 13.0 94 13.5 7.6 5.2 10.6 11.0 10.5 10.9 11.5 12.5 1 2 3 0 4.6 0000G0 995.9 4.0 0.0 1.8
28 6 NW 6 7 02 8.8 72 10.8 7.8 5.0 8.0 9.0 10.3 11.0 11.5 12.4 1 1 3 0 tr 000000 995.9 0.0 0.0 2.0
29 6 NW 4 7 02 8.2 78 11.0 6.9 4.7 7.1 7.9 9.3 10.3 11.3 12.3 1 0 0 0 5.5 004000 1012.7 5.0 0.0 1.2
30 3 NW 4 7 03 6.6 91 12.0 6.0 3.2 6.2 7.5 9.0 10.0 11.2 12.2 1 2 3 0 4.8 004000 1015.4 8.3 0.0 1.0
31 8 00 0 5 61 8.2 97 9.7 6.0 2.8 8.0 8.2 9.0 9.8 10.9 12.1 1 3 3 0 1.0 000000 1007.1 2.0 0.0 0.5
------------------------------------------------------------------------------------------------------------------------
Mean
6 10.3 88 13.5 7.7 5.4 9.8 10.2 11.1 11.9 12.7 13.4 1010.8
Total 156.8 111.2 0.0 33.7
------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1988-97 average used by the Climatological Observers Link. Rainfall was 152% of average
Air temperatures Weather (No. days occurrence) and 136% of 1961-90 average.
Mean maximum 13.5 (-0.4) Sleet/snow falling 0 ( 0.0) Most in a day: 16.3 mm (22nd).
Mean minimum 7.7 (+0.1) Snow lying (at 09GMT) 0 ( 0.0) No. of days with:
Mean 10.6 (-0.2) Hail <5 mm 2 [+1.0] >=0.2 mm 25 (+ 6.6)
No. days <0.0C 0 (-0.2) Hail >=5 mm 0 [all hail] >=1.0 mm 22 (+ 7.3)
Mean grass min 5.4 ( 0.0) Thunder heard 0 (-0.6) >=5.0 mm 11 (+ 3.6)
Lowest grass min -0.9 (-0.1) Gales 6 Lysimeter:
No. days <0.0C 1 (-1.7) Fog (at 09GMT) 0 PE 79.4 mm
PWB 77.4 mm
Highest maximum 15.6C on 22nd. Lowest minimum 2.5C on 18th. PWS 82.7 mm
Minimum relative humidity: 68% on 30th. PWD -5.3 mm
* Wettest Oct since 1987 and 13th wettest in records since 1928. Abs max lowest in 20 y. Piche: 33.7 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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 05 haze, 10 mist,
21 rain in past hour, 61 continuous slight rain, 63 cont. moderate rain, 80 slight rain shower, 81 heavy 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 1998
------------------------------------------------------------------------------------------------------------------------
-09GMT--> -Air Temperature- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C Gr SS Rain SLHTGF Press hrs hrs Evap
------------------------------------------------------------------------------------------------------------------------
01 1 S 1 7 87 5.6 97 11.3 3.6 0.2 6.0 7.0 8.5 9.5 10.3 12.0 1 2 4 0 3.7 004000 1007.5 6.5 0.0 1.6
02 8 SW 3 5 60 8.5 90 11.5 4.4 0.5 7.0 7.6 8.4 9.4 10.2 11.8 1 3 3 0 12.5 000t00 993.8 12.8 0.0 0.5
03 8 NE 5 7 87 7.8 91 8.2 5.7 4.0 7.5 7.8 8.5 9.2 10.1 11.8 1 2 3 0 7.1 004t00 988.2 5.5 0.0 0.9
04 6 N 5 7 01 4.6 84 9.2 2.9 -0.5 5.0 6.0 7.5 8.8 10.0 11.5 1 2 4 0 2.7 004000 1004.6 5.7 0.0 0.8
05 7 W 5 7 80 7.9 91 9.5 1.6 -0.2 6.5 6.8 7.5 8.3 9.8 11.4 1 2 4 0 tr 000000 1008.7 0.0 0.0 1.1
06 6 NW 1 7 02 6.8 96 12.5 5.2 0.7 6.0 6.8 7.9 8.5 9.4 11.0 1 1 1 0 tr 000000 1021.2 0.0 0.0 1.4
07 8 S 6 7 02 10.8 76 11.7 6.5 3.4 8.5 8.0 8.1 8.6 9.3 11.0 1 0 0 0 11.4 0000G0 1020.1 2.7 0.0 2.9
08 7 SW 2 6 01 10.4 95 15.4 9.8 8.4 9.3 9.2 9.0 9.0 9.7 11.0 1 2 3 0 10.7 0000G0 1008.7 6.6 0.0 2.1
09 7 W 5 5 02 11.7 70 12.0 10.5 9.8 10.3 10.6 10.5 10.1 10.1 11.0 1 0 0 0 3.0 0000G0 1004.2 1.2 0.0 1.6
10 2 W 2 7 02 6.0 89 10.7 4.9 0.7 5.7 7.2 9.0 9.8 10.2 11.0 1 1 1 0 0.1 000000 1015.8 0.0 0.0 0.9
11 7 SW 1 7 01 6.5 85 10.1 3.0 -0.6 4.9 5.6 7.6 8.5 9.9 11.0 1 2 3 0 3.4 000000 1024.6 6.0 0.0 2.5
12 8 W 4 7 80 9.2 91 9.2 5.9 5.0 7.5 7.8 8.0 8.6 9.5 11.0 1 3 3 0 2.5 0000G0 998.0 4.6 0.0 0.6
13 7 00 0 7 01 4.0 95 9.5 3.0 -0.5 5.0 6.1 7.5 8.4 9.5 10.9 1 2 4 0 9.6 s04000 1004.2 7.3 0.0 0.5
14 7 N 2 7 02 5.7 98 8.6 3.3 -0.4 5.1 5.8 7.1 7.9 9.0 10.7 1 2 3 0 0.4 004000 1003.0 0.6 0.0 0.8
15 6 N 2 7 02 6.4 81 8.2 5.2 2.7 5.3 6.2 7.3 8.0 8.9 10.5 1 1 3 0 1.3 000000 1018.9 1.7 0.0 0.6
16 4 NE 1 7 04 2.1 89 8.8 1.0 -3.0 2.2 3.9 6.0 7.2 8.6 10.5 1 1 7 0 0.0 000000 1029.4 0.0 0.0 1.0
17 7 00 0 7 03 3.7 85 6.7 2.0 -1.5 3.5 4.2 5.5 6.8 8.2 10.2 1 0 1 0 0.5 000000 1029.4 3.2 0.0 1.1
18 8 SE 1 7 02 6.2 83 7.8 3.7 2.6 5.0 5.4 6.1 7.0 7.9 10.2 1 2 3 0 0.0 000000 1027.6 0.0 0.0 0.7
19 8 SE 1 7 02 2.7 84 8.1 1.8 -2.3 2.5 3.5 5.2 6.8 7.9 10.0 1 0 4 0 tr 000000 1025.7 0.0 0.0 1.5
20 8 S 1 7 80 7.6 64 10.0 2.7 0.4 5.7 5.9 6.5 7.0 7.9 9.9 1 0 3 0 0.3 000000 1027.6 0.6 0.0 2.0
21 8 S 5 5 50 10.0 91 10.3 7.6 6.5 8.5 7.9 7.5 7.7 8.1 9.9 1 1 3 0 0.1 0000G0 1026.8 0.0 0.0 2.5
22 8 SW 5 5 60 6.6 84 6.9 6.5 5.3 6.2 6.8 7.3 7.8 8.3 9.9 1 3 3 0 6.1 000000 1020.1 9.5 0.0 0.4
23 1 00 0 7 11 3.5 100 9.2 3.2 -1.8 3.4 5.0 6.5 7.4 8.2 9.8 1 2 5 0 10.0 000000 1022.7 6.0 0.0 1.2
24 1 00 0 5 10 5.6 98 11.5 3.5 -0.5 5.3 6.3 7.0 7.2 8.0 9.8 1 2 1 0 0.1 000000 1015.0 0.0 0.0 0.4
25 6 SW 1 6 10 6.0 92 9.2 4.3 -0.2 4.0 4.9 6.1 6.8 7.8 9.5 1 2 4 0 4.2 000000 1016.2 3.8 0.0 0.8
26 8 W 5 6 02 9.0 93 10.1 3.6 -0.4 6.5 6.3 6.2 6.8 7.5 9.7 1 2 3 0 8.6 004000 1016.2 6.9 0.0 0.2
27 8 SW 2 5 51 10.1 99 11.6 6.7 2.8 8.0 7.7 7.2 7.1 7.8 9.4 1 3 3 0 15.7 000000 1019.7 8.1 0.0 0.2
28 7 W 1 6 21 8.3 97 9.5 8.3 7.7 9.2 9.3 9.0 8.5 8.5 9.4 1 2 3 0 0.2 000000 1009.5 0.0 0.0 0.3
29 2 NW 1 7 03 3.3 100 8.6 2.4 -1.6 3.5 5.0 6.5 7.5 8.3 9.3 1 2 4 0 3.1 000000 1020.8 8.0 0.0 0.4
30 8 N 1 4 42 7.6 99 10.0 3.3 -0.1 6.5 6.5 6.8 7.0 8.0 9.5 1 3 3 0 0.6 000000 1031.6 1.0 0.0 0.0
------------------------------------------------------------------------------------------------------------------------
Mean
6 6.8 90 9.9 4.5 1.6 6.0 6.6 7.4 8.0 8.9 10.5 1015.3
Total 117.9 108.3 0.0 31.5
------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1988-97 average used by the Climatological Observers Link. Rainfall was 106% of average
Air temperatures Weather (No. days occurrence) and 96% of 1961-90 average.
Mean maximum 9.9 (-0.5) Sleet/snow falling 1 (-0.4) Most in a day: 15.7 mm (27th).
Mean minimum 4.5 (-0.2) Snow lying (at 09GMT) 0 (-0.1) No. of days with:
Mean 7.2 (-0.4) Hail <5 mm 6 [+3.6] >=0.2 mm 22 (+ 1.5)
No. days <0.0C 0 (-0.2) Hail >=5 mm 0 [all hail] >=1.0 mm 17 (+ 1.2)
Mean grass min 1.6 (-0.8) Thunder heard 2 (+1.4) >=5.0 mm 9 (+ 1.3)
Lowest grass min -3.0 (+0.6) Gales 5 Lysimeter:
No. days <0.0C 14 (+4.8) Fog (at 09GMT) 0 PE 38.0 mm
PWB 79.9 mm
Highest maximum 15.4C on 8th. Lowest minimum 1.0C on 16th. PWS 80.1 mm
Minimum relative humidity: 63% on 4th. PWD -0.2 mm
* Piche: 31.5 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, 10 mist,
11 patches of shallow fog, 21 recent rain, 42 fog thinning, 50 slight drizzle, 51 moderate drizzle, 60 intermittent
slight rain, 80 slight rain shower, 87 shower of ice pellets.
Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
'Recording Atmospheric Depositions on Grass' page.
24 hour observations...
Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 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 DECEMBER 1998
------------------------------------------------------------------------------------------------------------------------
-09GMT--> -Air Temperature- --Soil temp-- --Earth temp-- -State Grd.- Weather Rain Fr. Pch
DD N dd ff V ww Temp RH Max Min Gmin 5cm 10cm 20cm 30cm 50cm 100cm E C Gr SS Rain SLHTGF Press hrs hrs Evap
------------------------------------------------------------------------------------------------------------------------
01 8 00 0 4 53 7.4 99 7.6 6.0 2.8 7.2 7.5 7.5 7.7 8.2 9.2 1 3 3 0 0.8 000000 1036.6 1.3 0.0 0.2
02 7 E 1 7 04 4.8 95 6.1 4.8 3.5 6.0 6.5 7.2 7.6 8.1 9.3 1 1 1 0 0.2 000000 1035.9 0.0 0.0 0.5
03 7 NE 1 5 10 4.8 97 7.6 2.6 -0.1 5.0 5.6 6.5 7.0 8.0 9.2 1 2 3 0 1.6 000000 1025.0 1.4 0.0 1.0
04 5 NE 2 7 01 3.2 76 6.0 2.9 0.7 2.6 4.0 5.8 7.0 7.8 9.2 1 0 0 0 0.2 000000 1020.1 0.1 0.0 1.0
05 7 NW 1 7 03 2.4 89 6.3 0.2 -4.0 1.6 3.0 4.5 6.0 7.2 9.1 1 1 4 0 1.5 004000 1018.9 0.9 3.5 0.6
06 6 N 1 7 04 -0.8 85 7.1 -1.8 -6.2 0.6 1.7 3.5 5.1 6.9 8.9 3 0 7 0 0.0 000000 1025.7 0.0 8.7 0.9
07 7 S 1 7 10 7.0 91 10.5 -0.8 -2.1 4.0 4.2 4.5 5.2 6.5 8.8 1 2 1 0 6.4 000000 1025.7 8.2 0.0 1.5
08 8 S 5 5 63 10.2 97 10.8 7.0 5.9 8.1 7.7 6.7 6.3 6.6 8.5 2 3 3 0 4.7 000000 1016.2 3.2 0.0 0.4
09 7 SW 2 7 10 8.6 93 12.5 5.3 0.2 5.0 5.2 6.3 6.7 7.1 8.6 1 2 3 0 0.1 000000 1018.1 0.0 0.0 1.6
10 7 S 5 6 25 12.5 80 12.6 8.6 6.3 9.0 8.4 7.5 7.1 7.5 8.5 1 2 3 0 7.5 000000 1012.3 4.1 0.0 0.2
11 6 S 1 7 04 5.6 97 12.0 5.5 0.9 5.3 6.3 7.2 7.5 7.7 8.5 1 2 1 0 4.4 000000 1015.0 3.4 0.0 0.8
12 6 SW 1 7 10 8.3 96 10.5 5.5 2.5 7.0 7.6 8.1 8.0 8.0 8.7 1 2 1 0 10.9 000000 1011.9 3.7 0.0 0.9
13 8 S 2 7 02 7.6 90 12.6 6.0 2.5 6.0 6.5 7.4 7.9 8.2 8.8 1 2 1 0 8.4 0000G0 1023.1 5.2 0.0 1.1
14 8 SW 6 5 02 12.6 93 12.6 7.6 6.6 11.0 10.1 9.0 8.5 8.4 8.8 1 2 3 0 2.8 0000G0 1016.2 4.4 0.0 0.2
15 7 SW 1 7 01 7.7 97 9.0 7.7 6.5 7.5 8.5 9.0 8.9 8.8 8.9 1 2 1 0 0.0 000000 1022.0 0.0 0.0 0.9
16 6 SW 6 7 01 8.8 89 10.6 6.4 4.5 6.7 7.5 8.0 8.5 8.8 9.2 1 1 1 0 0.0 000000 1027.2 0.0 0.0 2.0
17 8 SW 6 5 02 10.5 87 11.5 8.6 7.6 8.5 8.7 8.6 8.9 8.9 9.0 1 0 0 0 11.2 0000G0 1017.8 3.2 0.0 1.2
18 5 SW 2 6 03 6.6 90 8.0 5.9 3.5 5.6 6.5 7.8 8.5 8.8 9.0 1 1 1 0 12.3 004000 1012.3 6.1 0.0 0.5
19 7 NW 1 6 01 5.7 89 7.5 4.0 0.2 5.2 5.8 7.0 7.8 8.3 9.0 1 2 1 0 0.5 004000 1013.5 0.3 0.0 0.6
20 7 NE 3 7 01 2.8 69 4.5 1.5 -1.7 3.0 4.2 5.8 6.9 7.9 9.0 1 1 3 0 0.0 000000 1018.9 0.0 0.0 0.9
21 5 SW 1 7 03 3.0 74 6.9 -0.6 -4.9 1.5 2.0 4.4 5.4 7.3 9.0 1 0 1 0 5.1 000000 1022.7 2.9 1.5 0.6
22 3 S 1 7 10 4.7 97 9.0 2.4 -2.7 2.2 2.7 4.1 5.4 6.8 8.9 1 2 4 0 0.5 000000 1020.1 0.3 0.0 0.9
23 7 W 1 7 10 3.9 85 6.5 3.6 -0.1 3.5 4.5 5.3 6.0 6.8 8.6 1 2 1 0 0.3 000000 1013.9 0.0 0.0 0.9
24 8 SW 4 7 80 5.6 89 10.3 1.0 -2.4 2.8 3.0 4.1 4.9 6.5 8.5 1 2 3 0 16.0 000000 1014.6 7.3 0.0 0.5
25 7 SW 5 5 03 9.5 93 9.8 5.6 4.5 8.0 7.7 7.0 6.5 6.6 8.3 1 2 3 0 4.7 000000 1009.5 2.9 0.0 1.2
26 8 S 5 5 61 6.2 82 11.5 3.9 1.6 4.5 5.0 5.9 6.8 7.0 8.0 1 3 3 0 3.3 0000G0 1003.0 4.2 0.0 2.9
27 8 SW 2 5 63 5.5 86 7.1 3.9 0.6 3.8 4.2 5.2 6.2 7.0 8.1 2 3 3 0 9.9 000000 990.8 8.4 0.0 0.6
28 7 SW 4 7 79 3.5 91 6.6 2.0 -1.2 3.4 3.6 4.8 5.7 6.5 8.2 1 2 4 0 1.1 004000 993.8 1.5 0.0 1.4
29 8 SE 2 7 02 6.6 71 12.5 3.0 0.4 3.5 3.5 4.2 5.1 6.3 8.1 1 1 4 0 1.8 000000 1000.1 3.3 0.0 2.2
30 7 SW 5 6 21 8.7 86 9.0 6.6 4.5 6.6 6.8 6.1 5.8 6.5 7.8 1 2 3 0 1.1 0000G0 992.1 1.2 0.0 1.9
31 5 SE 2 7 03 8.6 61 10.4 5.5 0.4 2.8 3.8 5.1 5.6 6.7 7.9 1 0 1 0 0.4 000000 993.8 0.5 0.0 3.3
------------------------------------------------------------------------------------------------------------------------
Mean
7 6.5 88 9.2 4.2 1.3 5.1 5.6 6.3 6.8 7.5 8.7 1015.1
Total 117.7 78.0 13.7 33.4
------------------------------------------------------------------------------------------------------------------------
(.) Difference from 1988-97 average used by the Climatological Observers Link. Rainfall was 102% of average
Air temperatures Weather (No. days occurrence) and 104% of 1961-90 average.
Mean maximum 9.2 (+1.4) Sleet/snow falling 0 (-2.3) Most in a day: 16.0 mm (24th).
Mean minimum 4.2 (+1.3) Snow lying (at 09GMT) 0 (-0.7) No. of days with:
Mean 6.7 (+1.4) Hail <5 mm 4 [+1.7] >=0.2 mm 26 (+ 7.7)
No. days <0.0C 3 (-3.2) Hail >=5 mm 0 [all hail] >=1.0 mm 19 (+ 5.1)
Mean grass min 1.3 (+0.7) Thunder heard 0 (-0.3) >=5.0 mm 9 (+ 1.0)
Lowest grass min -6.2 (-0.3) Gales 5 Lysimeter:
No. days <0.0C 10 (-4.4) Fog (at 09GMT) 0 PE 29.6 mm
PWB 88.1 mm
Highest maximum 12.6C on 10, 13 & 14th. Lowest minimum 1.8C on 6th. PWS 88.2 mm
Minimum relative humidity: 58% on 31st. PWD -0.1 mm
* Moderate rainfall on waterlogged soils has caused much runoff and local flooding. Piche: 33.4 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 code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 10 mist,
21 rain in past hour, 25 recent rain shower, 53 continuous moderate drizzle, 61 cont. slight rain, 63 cont. mod. rain,
79 ice pellets, 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.
------------------------------------------------------------------------------------------------------------------------
Monthly and annual summary statistics at Llansadwrn, Anglesey for 1998
(.) Difference from 1988-97 average used by the Climatological Observers Link. Total rainfall 1215.5 mm
was 121% of average and
116% of the 1961-90 average.
Air temperatures Weather (No. days occurrence) Most in a day: 34.1 (Mar 2),
Mean maximum 13.6 (+0.1) Sleet/snow falling 7 (-5.0) 31.5 mm (Jun 17), and
Mean minimum 7.5 (+0.8) Snow lying (at 09GMT) 0 (-3.2) 28.6 mm (Jun 13).
Mean 10.6 (+0.5) Hail <5 mm 33 [+19.6] No. of days with:
No. days <0.0C 9 (-13.4) Hail >=5 mm 3 [all hail] >=0.2 mm 233 (+36)
Mean grass min 5.3 (+0.5) Thunder heard 9 (+2.5) >=1.0 mm 181 (+33)
Lowest grass min -6.9 (+0.7) Gales 26 >=5.0 mm 87 (+20)
No. days <0.0C 60 (-6.4) Fog (at 09GMT) 2 Lysimeter:
PE 674.7 mm
Highest maximum 27.9 on Aug 9th. Lowest minimum -2.2 on Jan 28th. PWB 540.8 mm
Minimum relative humidity: 46% on Jan 11th. PWS 747.6 mm
* Wettest year since 1967. Frost-free (air) from Feb 2nd to Dec 5th. PWD -206.6 mm
Piche: 428.9 ml
-------------------------------------------------------------------------------------------------------------------------------
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
-------------------------------------------------------------------------------------------------------------------------------
Annual summaries for 1998 (No. days occurrence at 09 GMT)
Cloud cover Wind direction Wind speed Visibility
Cloud obscured 0 N 39 Calm 19 <100 m Dense fog 0
8/8 cloud 136 NE 51 Force 1-3 240 100-190 m Thick fog 0
6/8 to 7/8 147 E 10 Force 4-5 83 200-390 m Fog 2
3/8 to 5/8 46 SE 14 Force 6-7 20 400-900 m Mod. fog 0
1/8 to 2/8 29 S 65 Force 8-12 3 1.0-1.9 km Very poor 8
Sky cloudless 7 SW 93 2.0-3.9 km Poor 93
W 36 4.0-9.0 km Moderate 61
NW 38 10 km or more Good 201
Calm 19
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 5 1 17 1 3 4
Feb 7 4 1 9 4 1 2
Mar 3 6 13 9
Apr 1 6 14 4 4 1
May 18 13
Jun 1 10 19
Jul 10 21
Aug 3 17 11
Sep 14 16
Oct 2 9 19 1
Nov 2 4 15 7 1 1
Dec 2 12 12 4 1
Year 26 111 1 179 30 4 5 8 1
State of ground
Code 0 1 2 3 4 5 6 7 8 9
Jan 23 2 6
Feb 26 2
Mar 29 2
Apr 28 1 1
May 16 15
Jun 4 26
Jul 8 23
Aug 12 19
Sep 30
Oct 31
Nov 30
Dec 28 2 1
Year 40 308 7 9 1
State of concrete
Code 0 1 2 3 4 5 6 7 8 9
Jan 11 2 7 11
Feb 11 13 3 1
Mar 15 4 8 4
Apr 16 1 8 5
May 24 2 3 2
Jun 16 5 9
Jul 18 3 6 4
Aug 21 4 3 3
Sep 13 4 6 7
Oct 7 5 12 7
Nov 5 5 15 5
Dec 5 6 16 4
Year 162 41 97 64 1
These pages are designed and written by Donald Perkins © 1998Page dated 1 January 1998: http://www.llansadwrn-wx.co.uk |