Natural siphon autographic raingauge used at this weather station.

Llansadwrn (Anglesey) Weather
Daily Observations 2001

at 0900 GMT


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Logo: Llansadwrn Weather - Melin Llynnon, Ynys Môn




January 2001

                               CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JANUARY 2001
---------------------------------------------------------------------------------------------------------------------------
  -09GMT-->       ---Air Temperature---       --Soil temp--  --Earth temp-- -State Grd.-     Weather         Rain  Fr. Pch
DD N dd ff  V ww Temp  Dpt  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E C GrSS   Rain SLHTGF   Press   hrs  hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 5 S   2  5 01  8.5  6.3  86 10.6  3.2  2.2  5.0  4.5  4.0  3.8  4.5  6.5  1 2 4  0    4.6 000000     978   1.6  0.0  2.2
02 7 00  0  7 02  7.3  4.8  84  8.5  7.3  4.9  5.4  5.5  5.3  5.0  5.3  6.3  1 2 3  0    3.7 000000     974   2.5  0.0  0.6
03 7 SW  3  7 80  4.1  1.8  85  8.4  2.8  0.0  2.4  3.3  5.3  5.1  5.4  6.5  1 1 3  0   10.4 000000     992   8.7  0.0  0.7
04 8 NW  1  6 10  6.4  6.0  97  6.4  4.1  2.4  6.3  6.2  6.0  5.3  5.7  6.6  1 2 3  0     tr 000000     983   0.0  0.0  0.2
05 6 NE  1  7 04  1.8  1.3  96  5.4  0.6 -1.8  1.8  2.6  4.0  5.0  5.8  6.7  1 1 5  0     tr 000000     984   0.0  0.0  0.3
06 7 W   2  6 05  5.8  4.9  94  7.0  1.8 -0.2  4.2  4.4  4.5  4.8  5.5  6.5  1 1 3  0    0.4 000000     993   1.2  0.0  0.5
07 1 W   1  7 05  3.0  2.0  93  6.5  2.6 -0.3  2.4  2.9  4.6  5.0  5.7  6.8  1 2 5  0    2.1 000000    1004   1.5  0.0  0.4
08 7 W   1  6 05  5.0  4.1  94  6.4  3.0  0.4  4.5  4.5  4.8  5.1  5.7  6.8  1 2 3  0    0.0 000000    1012   0.0  0.0  0.4
09 5 NE  1  8 04  1.6  1.1  93  5.5  1.5 -1.7  1.5  2.8  4.0  4.7  5.5  6.7  1 1 5  0    0.1 000000    1013   0.0  0.0  0.3
10 7 NE  3  7 80  3.6  2.6  93  4.9  0.8 -1.5  1.5  1.8  3.0  4.1  5.2  6.6  1 2 3  0     tr 000000    1013   0.0  0.0  1.6
11 1 E   5  8 02  2.4 -1.2  77  5.0  2.1 -0.3  0.8  1.7  3.0  3.8  5.0  6.5  1 0 5  0    0.0 000000    1022   0.0  0.0  1.4
12 6 E   5  8 03  3.6  0.1  78  5.7  2.4 -0.2  1.0  1.5  2.6  3.4  4.5  6.2  1 0 5  0    0.0 000000    1026   0.0  0.0  1.2
13 0 NE  1  7 04 -0.3 -2.4  86  8.2 -1.4 -6.2  0.4  1.2  2.1  3.1  4.4  6.2  3 0 7  0    0.0 000000    1030   0.0  5.5  2.4
14 0 00  0  7 05  2.5 -3.4  65  7.1 -0.3 -5.2  0.2  1.0  2.0  2.5  4.2  6.2  3 0 7  0    0.0 000000    1035   0.0  0.0  0.9
15 0 NE  1  7 04 -0.8 -2.6  87  6.5 -1.4 -6.0  0.0  0.7  1.5  2.3  3.8  5.8  3 6 7  0    0.0 000000    1026   0.0  9.0  0.4
16 7 00  0  7 04 -1.3 -2.5  91  4.1 -2.5 -8.3 -0.3  0.5  1.5  2.2  3.6  5.8  3 6 7  0    0.0 000000    1022   0.0 18.0  0.3
17 1 00  0  7 05 -0.8 -4.0  79  5.5 -2.6 -6.6 -0.4  0.3  1.3  2.0  3.5  5.6  3 5 7  0    0.0 000000    1019   0.0  7.0  0.6
18 7 SE  1  7 04  0.7 -1.3  86  6.5 -0.6 -5.1 -0.4  0.3  1.1  1.7  3.2  5.2  3 5 7  0    0.0 000000    1019   0.0  2.5  0.6
19 2 00  0  6 04 -1.4 -2.6  91  4.3 -1.7 -6.0  0.0  0.4  1.2  1.7  3.2  5.2  3 0 7  0    0.0 000000    1021   0.0 12.8  0.5
20 1 00  0  6 04 -0.4 -1.6  92  5.6 -1.6 -5.9 -0.3  0.4  1.1  1.8  3.0  5.0  3 6 7  0    0.8 000000    1025   2.3 10.0  1.0
21 8 SE  1  7 10  4.5  2.5  87  9.5 -0.4 -4.2  0.0  0.5  1.1  1.8  2.9  4.8  3 2 3  0    1.0 000001    1008   3.0  0.0  0.9
22 8 SE  2  7 10  9.5  6.3  80  9.6  0.9 -1.7  2.0  1.2  1.2  2.0  2.8  5.0  3 2 3  0    2.5 000000     991   4.2  0.0  1.6
23 8 S   2  6 10  7.1  4.1  81  9.9  6.2  4.3  4.1  4.0  3.6  3.1  3.3  4.9  1 2 3  0    6.3 000000     983   7.6  0.0  1.2
24 1 W   3  7 05  4.4  1.6  82  7.0  4.4  2.0  3.5  4.0  4.7  4.2  4.2  5.0  1 2 3  0    3.0 000000     982   2.3  0.0  1.4
25 6 SW  3  7 81  3.3  1.8  90  7.0  2.7  0.9  2.2  2.8  3.5  3.9  4.4  5.1  1 3 4  0    4.2 s05000     988   2.5  0.0  1.8
26 6 SW  1  7 02  3.9  1.9  87  7.7  3.1  0.3  2.8  3.4  4.0  4.2  4.5  5.3  1 2 3  0     tr 000000     990   0.0  0.0  0.7
27 2 W   1  7 05  2.5  1.5  93  8.2  1.2 -3.2  1.0  1.7  3.0  3.6  4.5  5.3  6 6 7  0    0.0 000000     996   0.0  0.0  0.4
28 2 00  0  7 10  1.1  0.8  98  5.4  0.3 -4.6  0.8  1.5  2.7  3.2  4.4  5.3  3 5 7  0    0.0 000000    1005   0.0  0.0  0.2
29 1 00  0  6 10  0.5  0.2  98  7.9 -0.2 -4.9  0.7  1.4  2.2  2.8  4.0  5.1  3 5 7  0    3.2 000000    1019   3.5  1.0  1.0
30 8 S   2  7 02  6.7  5.1  90  7.6  0.5 -2.5  4.1  3.9  3.5  3.2  4.0  5.2  1 2 3  0    1.5 000002    1014   2.2  0.0  0.1
31 8 00  0  4 42  5.8  5.6  98  6.5  5.6  5.4  5.1  5.0  4.7  4.3  4.5  5.2  1 3 3  0    0.2 000001    1023   0.0  0.0  0.2
---------------------------------------------------------------------------------------------------------------------------
Mean
   5              3.2  1.4  88  6.9  1.4 -1.7  2.0  2.4  3.1  3.5  4.4  5.8                            1006
Total                                                                                   44.0                 43.1 65.8 26.0
---------------------------------------------------------------------------------------------------------------------------
(.)  Difference from 1991-2000 average used by the Weather Observers Network.                Rainfall was 44% of average
Temperatures (air, grass and soil)       Weather (No. days occurrence)                       and  45% of 1971-2000 ave.
  Mean maximum      6.9    (-0.9)             Sleet/snow falling          1      (-1.1)      Most in a day: 10.4mm on 3rd.
  Mean minimum      1.4    (-1.3)             Snow lying (at 09GMT)       0      (-0.4)      No. days with:
  Mean              4.2    (-1.1)             Hail  <5 mm                 0      [-2.3]      >=0.2 mm        14      (- 4.6)
  No. days <0.0C     10    (+4.1)             Hail >=5 mm                 1    [all hail]    >=1.0 mm        11      (- 3.6)
  Mean grass min   -1.7    (-1.5)             Thunder heard               0      (-0.6)      >=5.0 mm         2      (- 4.4)
  Lowest grass min -8.3    (-1.8)             Gales                       0                  No. dry days    12      (+ 8.8)
  No. days <0.0C     20    (+5.3)             Fog (at 09GMT)              0
  Mean soil 30cm    3.5    (-1.4)                                                            Lysimeter:
                                                                                                    PE      -5.4 mm
  Highest maximum 10.6C (-1.4) on 1st. Lowest minimum  -2.6C (-0.2) on 17th.                        PWB     49.4 mm
  Minimum relative humidity:  46% on 13-14th.                                                       PWS     51.2 mm
* Driest Jan since 1997 (6.6mm driest on record) and 7th driest in records.                         PWD     -1.8 mm
* Mean 4.2C coldest since 1997 (3.9C). Mean max 6.9C coldest since 1991 (6.6C).              Piche:         26.0 ml
* Mean max and min 7th coldest in records since 1979. Mean min 1.4C coldest since 1991 (6.6C) and 6th coldest in records.
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
  DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
  V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
  ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
  42 fog becoming thinner, 80 slght rain shower, 81 moderate shower of rain.
  Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
  SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
  'Recording Atmospheric Depositions on Grass' page.
24 hour observations...
  Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
  Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
  Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
  PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
  s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
  3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
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February 2001

                               CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR FEBRUARY 2001
---------------------------------------------------------------------------------------------------------------------------
  -09GMT-->       ---Air Temperature---       --Soil temp--  --Earth temp-- -State Grd.-     Weather         Rain  Fr. Pch
DD N dd ff  V ww Temp  Dpt  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E C GrSS   Rain SLHTGF   Press   hrs  hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 8 S   1  7 05  4.4  2.1  85  6.8  0.5 -2.8  3.0  3.4  4.0  4.2  4.8  5.4  1 2 4  0    3.9 000000    1027   8.0  0.0  0.5
02 8 W   1  4 10  5.5  5.5 100  7.8  4.4  3.2  5.0  5.0  5.2  4.6  4.8  5.2  1 2 3  0   12.2 000000    1016   4.5  0.0  0.3
03 6 NW  2  5 10  5.3  4.8  97  8.5  5.0  1.5  5.0  5.2  5.4  5.2  5.2  5.4  1 2 3  0    9.3 000000    1004   7.8  0.0  0.2
04 8 E   2  5 63  4.0  3.5  97  9.5  3.2  1.2  4.5  4.8  5.1  5.2  5.3  5.7  2 3 3  0    8.1 000000     992   6.0  0.0  0.2
05 8 S   1  5 80  5.2  5.0  98  9.8  3.9  3.3  5.1  5.3  5.5  5.4  5.5  5.8  1 3 3  0    5.2 000000     987   5.8  0.0  1.1
06 7 SW  7  6 05  8.5  4.7  77  9.6  5.2  4.6  6.3  6.2  6.0  6.0  5.8  6.0  1 1 3  0    5.4 0000G0     979   4.4  0.0  3.0
07 8 SW  4  5 80  7.5  6.4  93  7.5  6.7  6.1  6.5  6.5  6.5  6.5  6.0  6.1  2 3 3  0   15.6 000000     987  10.0  0.0  0.9
08 4 NE  3  7 01  1.5 -2.3  76  4.0  1.2 -0.3  1.5  2.8  4.6  5.0  6.2  6.5  1 0 4  0    0.0 000000     999   0.0  4.8  1.0
09 5 S   1  7 04  0.7 -1.0  88  8.0 -1.6 -5.2  1.0  2.0  3.4  4.3  5.5  6.5  3 0 7  0     tr 000000    1022   0.0  6.3  2.2
10 8 S   5  7 02  8.0  4.6  79 10.6  0.6 -3.5  4.4  4.0  4.0  4.3  5.2  6.2  1 0 0  0   14.0 000000    1014   8.2  0.0  0.6
11 8 S   2  7 16  8.1  6.8  92  8.5  7.5  7.0  7.5  7.3  6.5  5.9  5.7  6.1  1 2 3  0   26.5 000000    1017  18.2  0.0  0.1
12 8 NE  2  7 10  5.4  4.7  95  8.9  4.5  4.2  5.5  5.8  6.1  6.2  6.0  6.1  1 2 3  0    0.0 000000    1020   0.0  0.0  0.7
13 4 00  0  7 04  2.2  0.3  87 10.6  1.0 -3.2  1.6  2.8  4.7  5.3  6.2  6.4  1 6 7  0    0.0 000000    1038   0.0  0.0  1.1
14 0 00  0  8 02  2.3 -4.8  59 10.8  0.6 -5.4  1.0  2.2  4.0  4.8  6.0  6.4  3 0 7  0    0.0 000000    1033   0.0  0.0  1.7
15 8 SW  1  7 05  4.5  2.5  87  8.6  1.8 -3.3  2.0  2.3  3.5  4.3  5.2  6.3  1 0 4  0    1.5 000000    1032   3.5  0.0  0.2
16 1 00  0  7 10  1.8  1.3  96  7.8  1.5 -2.2  2.0  2.5  4.2  4.8  5.3  6.2  1 4 5  0    0.0 000000    1035   0.0  0.0  0.7
17 5 00  0  7 04  1.7  0.3  91  8.5 -1.0 -5.5  1.1  2.2  3.6  4.5  5.2  6.2  3 0 7  0    0.0 000000    1044   0.0  1.5  0.3
18 5 00  0  7 04  0.0 -1.5  90  7.6 -1.1 -6.0  0.8  1.8  3.2  4.0  5.0  6.1  3 0 7  0    0.7 000000    1043   1.0  7.8  0.4
19 8 S   2  5 60  4.6  4.4  98  7.6  0.0 -3.9  3.0  2.4  3.3  3.9  4.9  6.1  1 3 3  0    0.9 000001    1040   1.5  0.0  0.2
20 7 SW  1  5 42  4.4  4.2  98  7.0  1.2 -0.5  3.8  3.2  4.1  4.3  4.8  6.0  1 2 2  0    0.3 000001    1038   1.2  0.0  0.3
21 8 S   1  4 42  6.5  6.5 100  8.3  4.4  4.4  5.9  5.7  5.4  5.1  5.2  5.8  1 2 2  0    2.0 000002    1032   5.2  0.0  0.2
22 8 NW  1  5 10  6.2  6.0  98  8.1  5.2  1.3  6.0  5.8  5.8  5.6  5.6  6.1  1 2 2  0    1.2 000002    1025   0.7  0.0  0.2
23 7 N   2  6 83  2.6  1.3  91  8.4  1.8 -0.2  3.8  4.5  5.3  5.7  5.8  6.1  1 3 6  0     tr s04000    1015   0.0  0.0  1.7
24 5 NE  1  7 04  1.2 -0.8  87  5.6  0.2 -2.4  1.7  2.5  4.5  5.3  5.8  6.3  1 0 4  0    1.5 s04000    1018   1.3  0.0  1.4
25 8 NE  2  7 02  2.7 -2.2  70  6.6  0.5 -2.7  1.5  2.4  3.8  4.8  5.6  6.4  1 0 6  0    1.7 s03000    1017   3.0  0.0  1.3
26 8 S   4  6 80  3.3  1.8  90  5.0  2.7  1.0  3.4  4.6  4.2  4.8  5.3  6.2  1 3 3  0    1.5 000000     995   3.0  0.0  0.2
27 7 NE  2  5 10  2.5  1.7  95  4.8  0.8 -2.2  3.2  3.5  4.1  4.6  5.3  6.2  1 2 3  0    1.8 s04000     987   3.6  4.2  1.4
28 8 NE  5  5 71 -0.4 -1.6  92  3.0 -0.7 -0.7  1.5  2.5  4.0  4.6  5.1  6.2  7 7 9  2    0.6 s03000    1001   0.5  0.0  1.4
---------------------------------------------------------------------------------------------------------------------------
Mean
   7              3.9  2.3  90  7.8  2.1 -0.4  3.5  3.9  4.6  5.0  5.4  6.1                            1016
Total                                                                                  113.9                 97.4 24.6 23.5
---------------------------------------------------------------------------------------------------------------------------
(.)  Difference from 1991-2000 average used by the Weather Observers Network.                Rainfall was 129% of average
Air temperatures                         Weather (No. days occurrence)                       and 152% of 1971-2000 ave.
  Mean maximum      7.8    (-0.5)             Sleet/snow falling          5      (+1.9)      Most in a day: 26.5mm on 11th.
  Mean minimum      2.1    (-0.7)             Snow lying (at 09GMT)       1      (-0.1)      No. days with:
  Mean              5.0    (-0.6)             Hail  <5 mm                 5      [+1.2]      >=0.2 mm        20      (+ 1.5)
  No. days <0.0C      4    (-0.9)             Hail >=5 mm                 0    [all hail]    >=1.0 mm        16      (+ 2.4)
  Mean grass min   -0.4    (-1.2)             Thunder heard               0      (-0.5)      >=5.0 mm         8      (+ 1.6)
  Lowest grass min -6.0    (-1.0)             Gales                       1                  No. dry days     6      (- 1.5)
  No. days <0.0C     17    (+5.0)             Fog (at 09GMT)              0
  Mean soil 30cm    5.0    (-0.3)                                                            Lysimeter:
                                                                                                    PE      -0.3 mm
  Highest maximum 10.8C on 14th. Lowest minimum  -1.6 on 9th.                                       PWB    114.2 mm
  Minimum relative humidity:  47% on 14th.                                                          PWS    114.8 mm
* Coldest February since 1996. Mean (5.0C) 11th coldest on 23y record.                              PWD     -0.6 mm
* With 113.9mm not as wet as Feb 2000 (143.4mm) but only 13 wetter in records since 1928.    Piche:         23.5 ml
* Most days with snow/sleet since 1996.
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
  DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
  V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
  ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
  10 mist, 16 precipitation within sight, 42 fog has thinned, 60 intermittent sl. rain, 63 continuous moderate rain,
  71 continuous fall of snowflakes, 80 slight rain shower, 83 slight sleet shower, 87 shower of ice pellets.
  Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
  SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
  'Recording Atmospheric Depositions on Grass' page.
24 hour observations...
  Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
  Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
  Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
  PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
  s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
  3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
 

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March 2001

                               CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR MARCH 2001
---------------------------------------------------------------------------------------------------------------------------
  -09GMT-->       ---Air Temperature---        --Soil temp--  --Earth temp-- -State Grd.-     Weather         Rain  Fr. Pch
DD N dd ff  V ww Temp  Dpt  RH  Max  Min  Gmin  5cm 10cm 20cm 30cm 50cm 100cm E C GrSS   Rain SLHTGF   Press   hrs  hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 2 NE  2  8 02 -0.4 -6.5  63  3.8 -0.9  -3.4  0.8  1.8  3.0  4.1  5.0  6.1  5 6 6  1    0.0 000000    1001   0.0 10.4  0.6
02 0 NE  1  7 05 -1.5 -3.1  89  5.4 -4.1  -8.7  0.5  1.5  2.6  3.6  4.9  6.0  3 0 7  0    0.0 000000    1001   0.0 16.0  0.8
03 1 SE  1  7 05 -2.5 -5.6  79  5.7 -4.5  -9.0  0.2  1.4  2.5  3.2  4.6  5.9  3 0 7  0    0.0 000000     997   0.0 17.1  0.8
04 0 00  0  7 04 -3.0 -5.4  83  6.5 -5.0 -10.2  0.0  1.2  2.2  2.9  4.0  5.6  3 0 7  0    0.0 000000     996   0.0 15.0  1.0
05 1 S   2  7 04  3.3  0.1  79  9.4 -3.0  -6.5  0.4  1.3  2.0  2.7  3.9  5.5  3 0 7  0    0.0 000000    1012   0.0  0.0  2.1
06 4 SE  2  7 04  7.1  1.1  66 14.2  0.2  -5.0  1.0  1.7  2.6  3.2  3.9  5.4  1 0 4  0    3.1 000000    1010   3.8  0.0  2.8
07 8 S   4  5 10  9.3  8.5  87 12.5  7.1   5.1  7.5  6.7  5.3  4.8  4.5  5.3  1 2 3  0    0.5 000000     999   0.3  0.0  2.0
08 6 S   2  6 15  8.7  7.2  90 13.5  7.8   6.2  7.0  6.7  6.2  5.9  5.3  5.3  1 3 3  0    2.2 000000     995   1.5  0.0  2.1
09 7 SW  1  5 10  7.7  7.5  99 10.0  7.4   6.8  7.5  7.3  7.0  6.6  6.0  5.8  1 2 3  0    3.6 000000     995   3.0  0.0  0.5
10 8 SW  2  4 51  9.0  9.0 100 10.2  7.7   7.7  8.3  7.9  7.5  7.0  6.5  6.1  1 3 3  0    1.1 000002     992   0.8  0.0  0.2
11 7 SE  1  7 80  8.0  7.6  97 10.5  6.8   4.5  7.6  7.5  7.5  7.3  6.9  6.5  1 3 3  0    0.2 000000     999   0.0  0.0  0.6
12 5 SW  2  7 03  5.1  2.6  84  7.4  2.9   0.3  4.6  5.3  6.6  7.1  7.0  6.8  1 1 1  0    1.5 000000     999   2.8  0.0  1.0
13 3 N   1  5 10  4.8  4.1  95 11.5  2.1  -0.8  4.5  5.0  6.1  6.6  6.8  7.0  1 2 4  0    0.0 004000     997   0.0  0.0  0.9
14 5 W   1  6 01  5.7  4.1  89 12.5  3.5  -1.6  6.0  5.8  6.4  6.8  6.8  6.8  1 0 4  0     tr 000000    1003   0.0  0.0  1.2
15 6 00  0  7 04  3.9  3.4  97  8.6  1.0  -4.0  3.5  4.5  6.0  6.8  7.0  7.0  1 0 5  0    0.3 000000    1008   0.0  0.0  0.9
16 8 E   3  5 25  5.5  3.8  89  7.5  3.9   3.7  6.1  6.2  6.5  6.8  6.9  7.1  1 2 3  0    0.1 000000    1008   0.0  0.0  1.1
17 8 E   3  7 02  2.7  1.1  89  4.4  1.4   0.8  4.1  4.6  5.8  6.4  6.8  7.1  1 2 3  0    1.2 s00000    1004   2.2  0.0  0.7
18 6 NE  4  7 70  3.0  0.0  81  6.0  1.2  -0.4  3.6  4.0  5.2  5.9  6.5  7.1  1 2 4  0    0.0 s00000    1006   0.0  0.0  1.4
19 5 SE  1  7 03  2.2 -1.2  78  8.9 -1.7  -6.6  1.4  2.7  4.5  5.5  6.4  7.0  3 0 7  0    0.0 000000    1015   0.0  5.5  1.8
20 7 E   6  7 02  3.0 -2.8  66  7.0  1.1  -3.6  2.5  3.3  4.8  5.6  6.2  7.0  1 0 0  0    1.6 000000    1009   1.8  0.0  1.8
21 8 E   6  5 70  1.6  0.5  93  7.5  0.8   0.2  2.8  3.5  4.6  5.2  6.1  6.9  1 3 9  0    3.6 s020G0     994   5.2  0.0  0.8
22 8 SW  2  2 46  7.0  7.0 100  9.2  1.6   1.1  6.0  5.6  5.2  5.5  5.9  6.8  1 2 2  0    0.1 000002     996   0.0  0.0  0.3
23 7 SE  1  7 05  9.2  8.0  90 11.8  6.6   6.0  7.4  6.8  6.5  6.2  6.3  6.8  1 2 3  0    0.1 000000     995   0.0  0.0  0.5
24 2 NE  1  7 10  8.0  6.9  93 12.5  5.2   3.3  7.3  7.0  7.3  7.2  6.8  6.9  1 2 2  0    0.0 000001    1000   0.0  0.0  1.0
25 7 E   2  7 05  5.4  3.0  84  8.9  3.1   0.8  6.6  6.9  7.5  7.8  7.3  7.0  1 0 1  0    0.0 000000    1005   0.0  0.0  1.1
26 5 E   1  6 05  5.4  0.5  71 10.0  2.3  -1.2  6.0  6.2  7.0  7.5  7.6  7.3  1 0 4  0    1.4 000000    1009   1.8  0.0  2.1
27 8 SE  2  7 02  5.0  2.8  86  7.6  4.5   3.6  6.0  6.5  7.1  7.4  7.5  7.4  1 2 3  0    4.2 000000    1000   6.0  0.0  0.7
28 3 S   1  7 01  5.3  4.6  95 11.2  3.5   0.1  5.5  6.0  6.7  7.1  7.3  7.5  1 2 3  0    0.0 000000     989   0.0  0.0  1.0
29 7 N   1  6 03  5.7  5.2  97  9.7  2.6  -0.5  6.4  6.4  7.1  7.4  7.5  7.5  1 0 4  0    0.2 000000     993   0.2  0.0  0.6
30 5 W   1  7 05  6.5  4.2  85 11.2  3.5   0.5  6.0  6.3  7.2  7.6  7.6  7.6  1 0 1  0    4.1 000000    1010   3.6  0.0  1.8
31 8 SW  6  5 60 10.0  9.6  97 14.0  6.5   6.5  9.3  8.8  8.2  8.1  7.8  7.6  1 3 3  0    5.9 000000    1005   2.2  0.0  0.9
---------------------------------------------------------------------------------------------------------------------------
Mean
   5              4.9  2.8  87  9.3  2.4  -0.1  4.7  5.0  5.6  6.0  6.2  6.6                            1001
Total                                                                                    35.0                 35.2 64.0 35.1
---------------------------------------------------------------------------------------------------------------------------
(.)  Difference from 1991-2000 average used by the Weather Observers Network.                 Rainfall was 41% of average
Air temperatures                         Weather (No. days occurrence)                        and  41% of 1971-2000 ave.
  Mean maximum      9.3    (-0.8)              Sleet/snow falling          3      (+2.7)      Most in a day: 5.9mm on 31st.
  Mean minimum      2.4    (-1.8)              Snow lying (at 09GMT)       1      (+0.7)      No. days with:
  Mean              5.9    (-1.3)              Hail  <5 mm                 3      [-0.7]      >=0.2 mm        16      (- 1.6)
  No. days <0.0C      6    (+4.5)              Hail >=5 mm                 0    [all hail]    >=1.0 mm        12      (- 0.5)
  Mean grass min   -0.1    (-2.4)              Thunder heard               0      (-0.4)      >=5.0 mm         1      (- 4.8)
  Lowest gr. min  -10.2    (-5.8)              Gales                       1                  No. dry days    11      (+ 2.1)
  No. days <0.0C     14    (+4.8)              Fog (at 09GMT)              1
  Mean soil 30cm    6.0    (-1.1)                                                             Lysimeter:
                                                                                                     PE      12.8 mm
  Highest maximum 14.2C on 6th. Lowest minimum  -5.0 on 4th.                                         PWB     22.1 mm
  Minimum relative humidity:  44% on 3rd.                                                            PWS     25.7 mm
* Driest March (35.0mm) since '93 (27.0mm) and 12th driest on record since 1928.                     PWD     -3.6 mm
* Driest month since Jul '99 (26.1mm), May '98 (25.3mm), Apr '97 (30.8mm) and Jan '97 (6.6mm).Piche:         35.1 ml
* Mean 5.9C coldest Mar since '96 (5.6C). Grass min (-10.2C) lowest in Mar on record. Low min (-5.0C) lowest since '86 (-5.2C).
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
  DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
  V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
  ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
  15, 16 precip. within sight (far, near), 25 rain shower in past hour, 46 fog thicker in past hour,
  51 continuous slight drizzle, 60 intermittent sl. rain, 61 cont. sl. rain, 70 intermittent snow, 80 sl. rain shower,
  81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
  Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
  SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
  'Recording Atmospheric Depositions on Grass' page.
24 hour observations...
  Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
  Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
  Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
  PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
  s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
  3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------

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April 2001

                               CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR APRIL 2001
---------------------------------------------------------------------------------------------------------------------------
  -09GMT-->       ---Air Temperature---       --Soil temp--  --Earth temp-- -State Grd.-     Weather         Rain  Fr. Pch
DD N dd ff  V ww Temp  Dpt  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E C GrSS   Rain SLHTGF   Press   hrs  hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 6 S   3  7 05  9.5  7.0  84 15.3  6.6  4.2  8.7  8.3  8.6  8.6  8.2  7.8  1 0 1  0     tr 000000    1018   0.0  0.0  2.6
02 7 S   4  6 60 13.0 10.1  83 14.1  9.4  6.4 11.0 10.1  9.7  9.4  8.7  7.8  1 0 3  0     tr 000000    1004   0.0  0.0  1.7
03 4 SW  4  7 05  8.0  3.6  74 11.4  4.0 -0.2  7.1  7.0  8.1  8.8  8.8  8.1  1 0 4  0   11.1 000000    1008   9.2  0.0  1.7
04 6 NW  3  7 10  6.4  5.3  92 13.0  4.1  3.8  7.6  7.6  8.3  8.8  8.8  8.3  1 2 3  0    2.0 004000    1001   1.1  0.0  1.2
05 8 S   2  5 10  5.5  4.3  92 10.1  3.6 -0.3  6.5  7.0  8.0  8.8  8.8  8.3  1 3 3  0   14.4 s00000    1003   7.5  0.0  1.2
06 8 SW  3  4 10  9.0  9.0 100 10.2  4.8  4.3  8.6  8.5  8.3  8.6  8.8  8.6  2 3 3  0   12.7 000000     996   8.8  0.0  0.4
07 8 SW  1  4 53  6.1  5.9  98 10.5  5.3  3.0  7.2  7.5  8.0  8.6  8.6  8.5  1 3 3  0    2.9 000000     993   1.9  0.0  0.3
08 7 W   3  6 03  8.0  6.0  88  8.8  2.2 -1.7  7.4  7.7  8.2  8.6  8.6  8.5  1 0 4  0    7.7 000000    1019   5.2  0.0  0.6
09 8 S   4  5 10  8.8  7.5  92 12.5  5.0  4.4  7.5  7.6  8.3  8.8  8.5  8.5  1 1 3  0    3.2 000000    1013   2.6  0.0  0.6
10 8 NW  2  6 10  8.3  8.1  99 12.0  7.0  6.2  8.6  8.5  8.6  8.8  8.5  8.5  1 2 3  0    0.2 000000    1016   0.5  0.0  0.7
11 2 N   2  7 03  7.3  5.5  88 10.4  3.4  0.3  7.5  7.2  8.5  9.3  8.9  8.6  1 0 1  0     tr 000000    1029   0.0  0.0  1.1
12 8 S   2  7 02  8.2  4.8  79 10.8  3.1 -0.5  8.3  8.2  8.9  9.5  9.5  8.8  1 0 4  0    0.1 000000    1029   0.0  0.0  0.7
13 8 SE  1  6 05  9.0  7.3  89 10.6  6.6  5.1 10.0  9.4  9.3  9.6  9.5  8.8  1 0 1  0    1.1 000000    1031   1.7  0.0  0.5
14 8 W   2  6 02  9.6  9.2  97 12.0  7.2  6.8 10.0  9.4  9.4  9.8  9.6  8.9  1 2 3  0    8.4 000002    1026   7.5  0.0  0.4
15 7 NW  4  7 01  8.5  6.6  88 12.1  7.0  6.8 10.3  9.7  9.6  9.9  9.6  8.9  1 2 3  0    0.0 000000    1015   0.0  0.0  1.0
16 7 N   3  7 01  7.0  4.5  84  9.5  4.8  2.6  7.4  8.1  9.2 10.0  9.8  9.1  1 2 1  0    0.0 000000    1020   0.0  0.0  1.7
17 7 W   3  7 03  8.0  4.6  79  8.2  1.8 -1.4  8.6  8.0  9.0 10.0  9.9  9.2  1 0 4  0    1.6 000000    1021   3.8  0.0  1.0
18 7 N   4  7 87  4.7  0.0  71  8.4  1.7 -0.6  6.4  6.5  8.0  9.3  9.8  9.2  1 0 4  0     tr s03000    1015   0.0  0.0  2.2
19 5 N   4  7 02  6.5  2.6  76 10.0  2.6 -0.5  6.4  6.2  7.8  9.2  9.4  9.3  1 0 4  0    0.2 003000    1016   0.2  0.0  1.8
20 4 NE  4  8 01  6.3  2.1  75  9.4  2.6 -0.1  7.0  6.7  8.0  9.3  9.5  9.2  1 0 4  0    0.0 000000    1017   0.0  0.0  1.8
21 7 SW  2  7 03  7.5  2.7  72 10.0  1.0 -3.0  7.1  6.8  8.0  9.7  9.6  9.3  1 0 4  0    3.7 000000    1016  11.5  0.0  1.6
22 8 S   2  7 61  6.1  4.2  88  7.0  5.0  4.2  7.5  7.5  8.5  9.2  9.5  9.3  1 3 3  0    6.5 000000     999   9.3  0.0  0.4
23 7 NW  2  7 10  6.4  5.5  94 12.3  2.4 -1.4  7.5  7.8  8.1  8.9  9.2  9.3  1 2 3  0     tr 000000    1001   0.0  0.0  1.5
24 8 SE  1  7 60  8.5  5.9  84  9.3  4.1 -0.5  7.7  7.7  8.5  9.3  9.5  9.2  1 1 3  0    6.9 000000     997   5.0  0.0  0.7
25 5 S   2  7 01  9.1  7.4  89 12.4  6.8  4.4  7.9  8.0  8.6  9.3  9.4  9.2  1 2 3  0    1.3 000000     997   1.3  0.0  1.1
26 7 NW  1  5 05  7.7  6.6  93 13.8  5.2  2.0  9.4  9.2  9.9 10.0  9.8  9.2  1 2 3  0    0.0 000000    1010   0.0  0.0  1.1
27 7 SW  2  7 05  8.7  6.5  86 13.4  4.6  1.0  8.2  8.4  9.5 10.1  9.9  9.4  1 0 1  0    8.8 000000    1011   3.8  0.0  1.3
28 6 W   3  7 03  7.6  6.3  83 11.4  5.0  2.4  8.1  8.7  9.8 10.2 10.0  9.6  1 2 3  0    8.5 004000    1002   5.6  0.0  1.0
29 8 E   1  6 83  3.6  3.4  98 11.1  3.0  1.4  8.2  8.3  9.1 10.0 10.0  9.6  2 3 3  0    2.5 s00000    1000   1.9  0.0  1.0
30 6 NE  2  7 01  7.7  6.2  90 11.5  3.5  0.3  8.8  8.8  9.5 10.0 10.0  9.5  1 2 3  0    0.0 000000    1014   0.0  0.0  1.1
31
---------------------------------------------------------------------------------------------------------------------------
Mean
   7              7.7  5.6  87 11.0  4.4  2.0  8.1  8.0  8.7  9.3  9.3  8.9                            1011
Total                                                                                  103.8                 88.4  0.0 34.0
---------------------------------------------------------------------------------------------------------------------------
(.)  Difference from 1991-2000 average used by the Weather Observers Network.                Rainfall was 140% of average
Air temperatures                         Weather (No. days occurrence)                       and 180% of 1971-2000 ave.
  Mean maximum     11.0    (-1.3)             Sleet/snow falling          3      (+1.1)      Most in a day: 14.4mm on 5th.
  Mean minimum      4.4    (-0.7)             Snow lying (at 09GMT)       0      (-0.2)      No. days with:
  Mean              7.7    (-1.0)             Hail  <5 mm                 4      [+1.1]      >=0.2 mm        19      (+ 2.0)
  No. days <0.0C      0    (-0.6)             Hail >=5 mm                 0    [all hail]    >=1.0 mm        17      (+ 3.8)
  Mean grass min    2.0    (-1.3)             Thunder heard               0      (-0.2)      >=5.0 mm         9      (+ 4.0)
  Lowest grass min -3.0    (-0.1)             Gales                       0                  No. dry days     4      (- 5.2)
  No. days <0.0C     11    (+5.7)             Fog (at 09GMT)              0
  Mean soil 30cm    9.3    (-0.1)                                                            Lysimeter:
                                                                                                    PE      24.7 mm
  Highest maximum 15.3C on 1st. Lowest minimum   1.0 on 21st.                                       PWB     79.1 mm
  Minimum relative humidity:  55% on 1st and 18th.                                                  PWS     84.5 mm
* Wettest April (103.8mm) since 1994 (127.1mm) and 6th wettest in records since 1928.               PWD     -5.4 mm
* Mean 7.7C coldest since 1994 (7.7C) joint coldest next to 6.8C in 1986.                    Piche:         34.0 ml
* Mean max 11.0C same as 2000; second only to 10.7C in 1986. Mean min 4.4C (4.3C in 2000); second only to 6.8C in 1986.
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
  DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
  V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
  ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
  16 precipitation within sight, 17 thunderstorm no precip., 21 rain in past hour, 42 fog thinner in past hour,
  53 continuous slight drizzle, 60 intermittent sl. rain, 61 cont. sl. rain, 63 cont. moderate rain, 80 sl. rain shower,
  81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
  Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
  SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
  'Recording Atmospheric Depositions on Grass' page.
24 hour observations...
  Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
  Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
  Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
  PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
  s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
  3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------

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May 2001

                               CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR MAY 2001
---------------------------------------------------------------------------------------------------------------------------
  -09GMT-->       ---Air Temperature---       --Soil temp--  --Earth temp-- -State Grd.-     Weather         Rain  Fr. Pch
DD N dd ff  V ww Temp  Dpt  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E C GrSS   Rain SLHTGF   Press   hrs  hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 6 NE  2  6 05  8.3  7.0  92 12.4  4.5  0.5  9.0  9.0  9.9 10.6 10.2  9.9  1 0 1  0    0.0 000000    1024   0.0  0.0  1.2
02 7 SW  1  7 05 10.5  6.0  74 17.0  4.8  2.0 10.6 10.5 10.8 11.2 10.8 10.0  1 0 1  0    0.7 000000    1024   1.8  0.0  1.7
03 7 N   1  7 01  7.7  6.2  90 12.5  6.3  3.9 10.6 10.7 11.4 11.7 11.1 10.0  1 2 3  0    0.0 000000    1014   0.0  0.0  1.3
04 6 N   2  7 02  9.0  6.9  86 12.1  5.6  3.8  9.0  9.8 11.1 12.0 11.5 10.2  1 0 1  0    0.0 000000    1017   0.0  0.0  1.4
05 1 N   1  7 02 10.5  6.5  76 13.5  3.5 -0.2 10.0  9.2 10.7 12.0 11.5 10.2  1 0 1  0    0.0 000000    1024   0.0  0.0  1.7
06 1 E   2  8 03  8.8  5.5  80 12.4  5.2  2.7  8.8  9.7 11.5 12.2 11.8 10.8  1 0 1  0    0.0 000000    1029   0.0  0.0  1.8
07 1 E   2  8 05  9.0  5.7  80 12.2  3.6  0.6 10.5  9.4 11.0 12.3 12.0 11.0  1 0 1  0    0.0 000000    1032   0.0  0.0  1.6
08 1 SE  1  7 05 10.8  4.6  66 15.4  5.0  1.0  8.8  9.8 11.5 12.5 12.2 11.0  0 0 1  0    0.0 000000    1031   0.0  0.0  1.7
09 3 E   2  7 05  9.0  4.5  73 15.7  5.1  1.5  9.2 10.3 12.0 13.0 12.5 11.2  0 0 1  0    4.0 000000    1026   2.6  0.0  2.1
10 7 NE  3  5 05 11.3 10.1  93 17.8  8.3  8.0 12.5 12.5 13.1 13.5 12.8 11.5  1 2 3  0    0.3 000t00    1020   0.3  0.0  1.4
11 7 00  0  6 05 17.0 13.5  80 21.5 11.3 10.8 15.2 14.3 14.1 14.0 13.1 11.5  1 0 3  0    0.0 000t00    1020   0.0  0.0  1.8
12 2 NE  1  5 05 18.9 13.9  73 23.7 14.0  9.5 14.8 14.5 14.6 14.5 13.5 11.8  1 0 1  0    0.0 000000    1022   0.0  0.0  3.4
13 3 E   3  7 05 15.5 10.8  74 21.6 10.5  8.8 12.5 12.8 14.7 15.1 13.9 12.0  0 0 1  0    2.7 000t00    1013   2.4  0.0  1.7
14 8 S   1  5 60 11.0 10.2  95 13.0  9.7  9.0 14.0 14.5 14.8 15.0 14.1 12.2  1 3 3  0   10.6 000000    1010   9.0  0.0  0.4
15 8 NE  1  7 10  9.5  9.1  97 11.6  8.5  8.4 12.3 12.5 13.4 14.3 14.0 12.5  1 2 3  0    2.5 000000    1005   0.0  0.0  0.6
16 7 SW  1  5 25 10.0  9.0  93 13.0  8.0  6.0 12.0 12.2 13.0 13.8 13.8 12.5  1 0 3  0    2.6 000000     995   2.8  0.0  0.5
17 8 N   2  7 10  9.2  8.8  97 13.4  6.8  4.0 11.2 11.8 12.7 13.5 13.5 12.5  1 1 3  0     tr 000000     999   0.0  0.0  1.3
18 7 W   2  7 02 10.0  7.9  87 13.6  4.3  0.8 10.8 11.0 12.0 13.2 13.2 12.5  1 0 3  0    0.0 000000    1019   0.0  0.0  1.0
19 7 W   1  7 02 12.1  8.7  80 15.5  9.0  6.0 13.5 12.9 13.0 13.4 13.0 12.3  1 0 1  0    0.0 000000    1025   0.0  0.0  1.5
20 7 S   1  6 01 13.3 11.4  88 16.3 10.2  8.2 15.0 13.8 13.5 13.8 13.3 12.3  0 0 1  0    0.0 000000    1028   0.0  0.0  1.1
21 4 S   1  7 02 16.3 11.7  74 18.0  8.9  5.7 16.0 13.6 13.2 13.8 13.3 12.3  0 0 1  0    0.0 000000    1027   0.0  0.0  1.9
22 3 NE  1  7 05 17.5 10.4  63 22.5  9.7  6.5 16.5 14.0 13.9 14.2 13.6 12.5  0 0 1  0    0.0 000000    1025   0.0  0.0  2.8
23 5 NE  1  7 05 18.2 11.1  63 19.4 11.0  7.5 17.5 15.4 15.0 15.2 14.2 12.5  0 0 1  0    0.0 000000    1025   0.0  0.0  2.6
24 1 NE  1  7 05 19.7 12.2  62 24.0 10.8  8.0 18.8 15.9 15.7 15.6 14.8 12.8  0 0 1  0    0.0 000000    1025   0.0  0.0  3.1
25 6 S   1  7 05 17.1 11.4  69 20.5 11.5  7.8 16.2 16.1 16.5 16.5 15.2 13.0  0 0 1  0    0.3 000000    1020   1.2  0.0  1.9
26 8 S   2  4 51 13.3 13.1  99 16.5 12.3 11.2 15.5 15.8 16.1 16.2 15.2 13.4  1 3 3  0    6.7 000000    1018   6.9  0.0  0.5
27 8 S   2  4 51 13.4 13.4 100 14.5 11.8 11.6 15.0 15.0 15.0 15.7 15.2 13.5  1 3 3  0   16.3 000002    1019   6.3  0.0  0.1
28 8 SW  5  4 10 14.0 13.8  99 15.5 12.9 12.7 14.8 14.7 14.8 15.1 14.8 13.6  1 3 3  0     tr 000002    1017   0.0  0.0  1.1
29 1 W   4  7 05 14.7 11.0  78 18.4 10.2  8.2 15.5 13.4 13.7 14.8 14.7 13.7  1 0 3  0    0.0 000000    1022   0.0  0.0  2.5
30 6 SW  4  7 05 14.9 12.0  83 17.0  9.8  6.6 16.0 15.0 15.0 15.2 14.8 13.6  1 0 0  0    1.8 000000    1019   2.3  0.0  1.0
31 7 NW  2  7 02 12.4 10.1  86 16.0  7.0  4.4 15.4 14.2 14.5 15.2 15.0 13.8  1 0 3  0    0.2 000000    1021   0.1  0.0  1.3
---------------------------------------------------------------------------------------------------------------------------
Mean
   5             12.7  9.6  82 16.3  8.4  6.0 13.1 12.7 13.3 13.8 13.3 12.0                            1020
Total                                                                                   48.7                 35.7  0.0 48.0
---------------------------------------------------------------------------------------------------------------------------
(.)  Difference from 1991-2000 average used by the Weather Observers Network.                Rainfall was 74% of average
Air temperatures                         Weather (No. days occurrence)                       and  85% of 1971-2000 ave.
  Mean maximum     16.3    (+0.6)             Sleet/snow falling          0      (-0.3)      Most in a day: 16.3mm on 27th.
  Mean minimum      8.4    (+0.8)             Snow lying (at 09GMT)       0      (-0.1)      No. days with:
  Mean             12.4    (+0.7)             Hail  <5 mm                 0      [-1.4]      >=0.2 mm        12      (- 0.9)
  No. days <0.0C      0    ( 0.0)             Hail >=5 mm                 0    [all hail]    >=1.0 mm         8      (- 1.6)
  Mean grass min    6.0    ( 0.0)             Thunder heard               3      (+2.2)      >=5.0 mm         3      (- 1.5)
  Lowest grass min -0.2    (-0.3)             Gales                       0                  No. dry days    17      (+ 3.5)
  No. days <0.0C      1    (+0.1)             Fog (at 09GMT)              0
  Mean soil 30cm   13.8    (+0.6)                                                            Lysimeter:
                                                                                                    PE      58.9 mm
  Highest maximum 24.0C on 24th. Lowest minimum  3.5C on 5th.                                       PWB    -10.2 mm
  Minimum relative humidity:  51% on 24th.                                                          PWS     30.3 mm
* Driest May (48.7mm) since 1998 (25.3mm) but there have been 25 drier in records since 1928.       PWD    -40.5 mm
*
*                                                                                            Piche:         48.0 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
  DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
  V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
  ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
  16 precipitation within sight, 17 thunderstorm no precip., 25 rain shower in past hour,
  51 continuous slight drizzle, 60 intermittent sl. rain, 61 continuous sl. rain, 63 cont. moderate rain,
  81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
  Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
  SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
  'Recording Atmospheric Depositions on Grass' page.
24 hour observations...
  Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
  Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
  Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
  PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
  s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
  3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
 

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June 2001

                               CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JUNE 2001
---------------------------------------------------------------------------------------------------------------------------
  -09GMT-->       ---Air Temperature---       --Soil temp--  --Earth temp-- -State Grd.-     Weather         Rain  Fr. Pch
DD N dd ff  V ww Temp  Dpt  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E C GrSS   Rain SLHTGF   Press   hrs  hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 8 NW  1  7 02 12.5 10.2  86 14.1 10.3  9.7 15.1 14.8 15.9 15.3 15.0 13.8  1 0 3  0    1.2 000000    1024   2.8  0.0  0.9
02 8 NE  2  6 25  9.9  8.7  92 13.5  9.5  9.7 13.0 13.5 14.2 14.8 14.9 13.8  1 1 3  0     tr 000000    1018   0.0  0.0  1.8
03 3 N   2  8 02 10.4  6.1  75 16.0  6.4  2.3 14.5 12.7 13.5 14.8 14.8 13.8  0 0 1  0    0.0 000000    1027   0.0  0.0  2.0
04 7 W   2  7 02 12.8  8.6  76 14.4  8.7  6.3 15.5 14.6 15.0 15.2 15.0 13.8  0 0 0  0    0.0 000000    1026   0.0  0.0  1.5
05 8 SW  3  7 02 12.4  8.8  79 18.5  9.6  7.1 14.4 14.2 14.8 15.0 14.9 13.8  0 0 0  0     tr 000000    1018   0.0  0.0  2.2
06 8 SW  4  5 60 11.5  9.5  88 12.6 10.1  9.2 15.2 15.2 15.6 15.6 15.0 13.9  0 0 3  0    2.5 000000    1011   5.3  0.0  0.8
07 6 W   3  7 03 11.1  6.7  74 13.2  5.0  2.6 13.5 12.2 13.1 14.6 14.9 13.9  1 0 1  0     tr 000000    1010   0.0  0.0  1.5
08 6 N   2  7 03  9.5  4.6  71 13.6  3.5  0.9 13.1 11.8 12.8 14.2 14.6 13.9  0 0 3  0    0.4 000000    1015   0.3  0.0  1.7
09 8 SW  3  7 02 10.6  7.5  81 15.6  7.4  5.3 13.9 13.2 13.8 14.3 14.6 13.8  0 2 3  0     tr 000000    1014   0.0  0.0  1.8
10 1 NE  2  8 02 10.7  6.5  75 13.7  7.1  3.7 15.1 12.7 13.2 14.5 14.5 13.8  0 0 0  0    0.0 000000    1019   0.0  0.0  1.7
11 8 SW  2  7 02 12.5  8.7  78 14.2  6.8  3.7 15.5 14.5 14.5 14.8 14.6 13.8  0 0 0  0    0.0 000000    1022   0.0  0.0  1.5
12 8 S   2  7 05 13.6 10.4  81 16.2 10.3  9.5 14.8 14.0 14.2 14.7 14.5 13.8  0 0 0  0    0.0 000000    1021   0.0  0.0  1.6
13 7 00  0  7 05 14.7  7.9  64 15.9  9.1  7.2 16.5 14.6 14.4 14.8 14.6 13.8  0 0 1  0    0.0 000000    1016   0.0  0.0  1.5
14 7 E   1  6 05 14.8 10.0  73 16.9  8.1  4.6 15.1 14.2 14.2 14.9 14.8 13.8  0 0 1  0   14.1 000000    1012   6.1  0.0  0.7
15 7 S   1  7 01 15.2 13.6  90 18.7 11.5 11.0 17.0 15.1 14.7 15.0 14.8 13.8  1 2 3  0    4.2 000000    1004   2.2  0.0  0.8
16 7 NE  2  5 05 13.3 11.8  91 16.4 11.2  8.4 15.5 15.1 15.0 15.7 15.1 13.9  1 0 3  0    0.3 000000    1004   2.3  0.0  0.9
17 6 N   3  7 01 11.4  8.2  80 14.3  9.4  9.0 15.2 14.2 14.8 15.7 15.2 14.0  1 0 3  0    0.0 000000    1018   0.0  0.0  1.9
18 7 S   2  7 05 14.2  8.0  66 17.0  6.5  4.0 15.5 14.2 14.8 15.8 15.3 14.0  1 0 1  0    0.4 000000    1027   2.4  0.0  2.1
19 8 S   4  5 60 14.0 13.1  94 16.2 11.7 10.8 15.5 15.2 15.7 15.8 15.3 14.0  1 2 3  0    5.5 000000    1024   4.3  0.0  1.5
20 8 W   3  6 10 14.5 12.7  89 18.6 12.1 11.6 16.1 15.0 14.8 15.3 15.1 14.1  1 1 3  0    0.0 000002    1018   0.0  0.0  1.6
21 7 N   1  7 02 11.8  7.0  73 15.5  7.4  4.5 15.5 14.3 14.8 15.6 15.2 14.1  1 0 1  0    0.0 000000    1021   0.0  0.0  1.3
22 7 NE  1  7 05 11.7  7.4  75 18.5  9.8  9.3 16.0 15.3 15.6 15.8 15.3 14.2  1 0 1  0    0.0 000000    1020   0.0  0.0  1.8
23 6 S   1  7 05 18.5 11.0  62 19.9 10.3  8.2 19.0 16.5 16.0 16.2 15.6 14.3  0 0 1  0    0.0 000000    1017   0.0  0.0  1.6
24 7 S   3  7 05 17.2 13.3  78 21.5 11.0  8.5 17.5 16.0 16.0 16.2 15.8 14.4  0 0 1  0    0.0 000000    1020   0.0  0.0  2.0
25 7 SW  1  7 05 18.2 14.4  82 20.3 12.5  9.8 19.3 17.2 17.0 17.0 16.1 14.6  0 0 1  0    1.4 000000    1024   0.6  0.0  1.8
26 6 NE  3  5 05 18.2 15.3  83 25.8 14.0 12.1 20.1 18.3 17.7 17.6 16.5 14.8  1 1 3  0     tr 000T00    1014   0.0  0.0  1.8
27 8 S   2  4 10 15.7 15.0  96 19.8 14.2 14.2 17.8 18.0 18.5 18.2 17.0 15.0  0 0 2  0     tr 000002    1009   0.0  0.0  1.6
28 8 SW  2  7 02 15.3 12.6  84 20.0 12.9 12.0 18.2 17.5 17.2 17.6 17.0 15.2  0 0 0  0    0.3 000000    1012   0.2  0.0  2.4
29 8 S   6  6 80 17.0 14.6  86 19.7 15.3 14.8 18.2 17.8 17.8 17.7 16.9 15.2  0 1 3  0    0.0 000000    1012   0.0  0.0  2.5
30 6 SW  3  7 05 16.3 12.3  77 19.8 13.5 12.9 19.0 17.5 17.2 17.3 16.9 15.3  0 0 0  0    0.0 000000    1016   0.0  0.0  2.4

---------------------------------------------------------------------------------------------------------------------------
Mean
   7             13.6 10.2  80 17.0  9.8  8.1 16.0 15.0 15.2 15.7 15.3 14.1                            1017
Total                                                                                   30.3 000102          26.5  0.0 49.2
---------------------------------------------------------------------------------------------------------------------------
(.)  Difference from 1991-2000 average used by the Weather Observers Network.                Rainfall was 41% of average
Air temperatures                         Weather (No. days occurrence)                       and  46% of 1971-2000 ave.
  Mean maximum     17.0    (-0.3)             Sleet/snow falling          0      ( 0.0)      Most in a day: 14.1mm on 14th.
  Mean minimum      9.8    ( 0.0)             Snow lying (at 09GMT)       0      ( 0.0)      No. days with:
  Mean             13.4    (-0.2)             Hail  <5 mm                 0      [-0.2]      >=0.2 mm        10      (- 5.5)
  No. days <0.0C      0    ( 0.0)             Hail >=5 mm                 0    [all hail]    >=1.0 mm         6      (- 4.4)
  Mean grass min    8.1    (-0.2)             Thunder heard               1      (-0.1)      >=5.0 mm         2      (- 2.6)
  Lowest grass min  0.9    (-2.2)             Gales                       0                  No. dry days    14      (+ 2.3)
  No. days <0.0C      0    ( 0.0)             Fog (at 09GMT)              0
  Mean soil 30cm   15.7    (+0.3)                                                            Lysimeter:
                                                                                                    PE      55.3 mm
  Highest maximum 25.8C on 26th. Lowest minimum   3.5 on 8th.                                       PWB    -25.0 mm
  Minimum relative humidity:  54% on 3rd.                                                           PWS     18.8 mm
* Driest June since 1988 (19.8mm) and 1976 (29.7mm). Only 10 drier in records since 1929.           PWD    -43.8 mm
* Driest any month since Jul 1999 (26.1mm), Jan 1997 (6.6mm) and Aug 1995 (9.2mm).
* Minimum of 3.5C and grass 0.9C on 8th lowest since 1991 (2.0C and 0.1C respectively).      Piche:         49.2 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
  DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
  V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
  ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
  16 precipitation within sight, 17 thunderstorm no precip., 21 rain in past hour, 42 fog thinner in past hour,
  50 slight drizzle, 60 intermittent sl. rain, 61 continuous sl. rain, 63 cont. moderate rain, 80 sl. rain shower,
  81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
  Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
  SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
  'Recording Atmospheric Depositions on Grass' page.
24 hour observations...
  Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
  Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
  Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
  PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
  s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
  3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------

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July 2001

  
                               CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JULY 2001
---------------------------------------------------------------------------------------------------------------------------
  -09GMT-->       ---Air Temperature---       --Soil temp--  --Earth temp-- -State Grd.-     Weather         Rain  Fr. Pch
DD N dd ff  V ww Temp  Dpt  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E C GrSS   Rain SLHTGF   Press   hrs  hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 7 S   2  6 01 18.4 15.2  82 22.2 13.9 12.8 20.0 18.3 17.8 17.5 17.0 15.3  0 0 0  0    0.0 000000    1026   0.0  0.0  1.9
02 1 S   2  7 05 19.0 16.2  84 23.5 12.4 10.7 21.3 18.3 17.9 17.8 17.1 15.5  0 0 0  0    0.0 000000    1029   0.0  0.0  1.5
03 7 SW  1  5 10 16.5 15.1  92 21.3 13.4 11.5 19.5 19.0 18.8 18.3 17.5 15.6  0 0 2  0   11.2 000T02    1020   6.2  0.0  0.7
04 8 NE  2  2 46 14.1 14.1 100 21.0 14.0 14.0 16.5 17.5 18.0 18.1 17.5 15.5  1 3 3  0     tr 000002    1012   0.0  0.0  0.8
05 5 NE  4  6 04 19.0 14.4  76 19.8 14.1 13.1 21.3 18.2 17.5 18.5 17.7 16.0  1 0 1  0    0.0 000000    1015   0.0  0.0  1.9
06 6 NE  3  5 05 16.6 15.9  96 19.9 11.6 10.4 19.0 17.8 18.0 18.8 17.8 16.1  0 0 1  0    0.9 000000    1012   1.1  0.0  0.6
07 8 NW  1  3 53 15.0 15.0 100 16.0 14.4 13.0 18.0 18.2 18.5 18.8 18.1 16.0  1 3 3  0    7.7 000001    1008   9.0  0.0  0.2
08 8 NW  1  5 50 13.0 13.0 100 14.8 12.5 12.5 15.8 15.2 17.1 17.8 17.8 16.2  1 3 3  0     tr 000000    1011   0.0  0.0  0.8
09 7 W   1  7 01 14.8 10.0  73 19.0 11.5  9.5 17.8 16.4 16.4 17.4 17.3 16.2  1 0 3  0    4.1 000000    1015   3.0  0.0  2.2
10 3 SW  5  7 01 15.5 12.8  84 17.2 12.5  9.0 17.8 16.5 16.8 17.5 17.3 16.2  1 0 3  0    7.5 000000    1001   2.6  0.0  2.0
11 8 W   5  5 60 11.7 11.1  96 15.6 10.1  7.6 14.2 14.8 15.6 17.0 17.1 16.0  1 3 3  0    1.6 000000    1003   1.8  0.0  1.4
12 6 SW  4  8 02 13.8  9.5  75 15.2 10.4  7.1 16.0 14.7 15.2 16.5 16.8 16.0  1 0 3  0    1.2 000000    1007   1.9  0.0  1.2
13 8 NW  1  7 60 12.7 10.4  86 15.6  9.9  5.9 16.0 15.2 15.5 16.3 16.5 15.8  1 1 3  0     tr 000000    1006   0.0  0.0  1.1
14 7 N   1  7 02 11.6  8.8  83 15.5  7.5  5.8 14.5 14.3 15.2 16.3 16.5 15.8  1 0 1  0    0.7 000000    1007   0.3  0.0  1.3
15 6 N   2  7 02 12.2  8.4  77 17.5  5.9  4.1 15.1 14.0 15.0 16.3 16.5 15.6  1 0 1  0    0.0 000000    1015   0.0  0.0  1.6
16 1 S   1  8 03 15.4  6.9  57 18.4  7.2  4.5 15.4 13.2 14.4 16.0 16.2 15.6  0 0 1  0    0.0 000000    1017   0.0  0.0  2.1
17 8 E   3  7 05 13.4  8.0  70 16.0  9.4  6.5 14.2 14.5 15.5 16.3 16.3 15.5  0 0 1  0    4.1 000000    1003   4.8  0.0  1.6
18 8 NE  6  6 60 12.7 10.2  85 14.7 11.7 10.9 13.6 14.0 15.0 15.8 16.0 15.5  1 3 3  0    1.3 0000G0    1001   2.5  0.0  1.9
19 6 NE  3  7 05 13.3 10.2  82 15.3 10.9  9.0 15.0 13.3 14.1 15.3 15.8 15.3  1 0 1  0    0.0 000000    1010   0.0  0.0  1.5
20 8 SW  2  8 03 15.0  8.5  65 16.8  9.4  6.2 14.5 13.5 14.4 15.3 15.6 15.2  1 0 1  0    0.7 000000    1014   1.0  0.0  1.8
21 8 SW  3  7 02 15.8 13.5  86 17.5 12.5 11.3 16.2 15.6 15.5 15.8 15.6 15.1  1 0 3  0    0.2 000000    1010   0.0  0.0  1.5
22 8 SW  1  5 80 14.6 13.3  92 20.7 13.9 12.8 16.0 15.7 15.7 16.0 15.8 15.1  1 1 3  0     tr 000000    1014   0.0  0.0  2.0
23 3 S   4  7 03 16.7 13.0  79 18.8 12.6  9.3 16.8 15.8 16.5 16.6 16.1 15.1  0 0 1  0    0.3 000000    1019   0.8  0.0  2.4
24 8 SW  2  5 60 14.5 14.0  97 17.5 12.7 11.5 15.8 15.7 16.1 16.2 16.1 15.1  1 3 3  0    1.6 000000    1018   1.7  0.0  0.6
25 7 SW  2  7 02 17.5 13.3  76 22.8 14.0 13.0 17.2 16.0 16.0 16.2 16.1 15.1  1 1 3  0    0.0 000000    1020   0.0  0.0  2.1
26 5 SW  2  5 05 18.0 16.0  80 21.3 13.4 10.8 18.9 17.4 17.4 17.4 16.5 15.2  0 0 2  0    0.0 000001    1019   0.0  0.0  2.2
27 6 SE  1  8 03 19.3 13.0  66 23.8 11.8  9.8 19.8 17.5 17.7 17.8 17.1 15.5  0 0 1  0    0.0 000000    1019   0.0  0.0  2.0
28 4 NE  1  8 03 21.0 16.1  73 25.9 13.7 11.1 19.1 17.7 18.1 18.0 17.2 15.8  0 0 1  0    0.0 000000    1023   0.0  0.0  2.5
29 6 SW  4  5 01 17.6 15.2  86 21.8 16.9 15.1 20.4 19.4 19.3 18.8 17.8 16.0  0 0 0  0    0.0 000000    1024   0.0  0.0  1.5
30 3 SW  2  7 05 17.7 11.7  68 23.0 13.9 11.2 20.8 19.3 18.9 18.8 17.9 16.0  0 0 0  0    2.8 000000    1026   7.0  0.0  2.8
31 7 N   2  7 01 14.1 13.2  94 18.0 13.2 13.5 18.4 18.5 19.0 18.8 18.0 16.1  1 2 3  0    0.0 000000    1026   0.0  0.0  1.9
---------------------------------------------------------------------------------------------------------------------------
Mean
   6             15.5 12.5  83 18.9 12.0 10.1 17.3 16.3 16.7 17.2 16.9 15.6                            1014
Total                                                                                   45.9                 43.7  0.0 49.6
---------------------------------------------------------------------------------------------------------------------------
(.)  Difference from 1991-2000 average used by the Weather Observers Network.                Rainfall was 77% of average
Air temperatures                         Weather (No. days occurrence)                       and  72% of 1971-2000 ave.
  Mean maximum     18.9    (-0.5)             Sleet/snow falling          0      ( 0.0)      Most in a day: 11.2mm on 3rd.
  Mean minimum     12.0    ( 0.0)             Snow lying (at 09GMT)       0      ( 0.0)      No. days with:
  Mean             15.4    (-0.3)             Hail  <5 mm                 0      [-0.6]      >=0.2 mm        15      (  0.0)
  No. days <0.0C      0    ( 0.0)             Hail >=5 mm                 0    [all hail]    >=1.0 mm        10      (- 0.3)
  Mean grass min   10.1    (-0.4)             Thunder heard               1      (+0.8)      >=5.0 mm         3      (- 1.0)
  Lowest grass min  4.1    (-1.7)             Gales                       0                  No. dry days    12      (+ 0.6)
  No. days <0.0C      0    ( 0.0)             Fog (at 09GMT)              1
  Mean soil 30cm   17.2    ( 0.0)                                                            Lysimeter:
                                                                                                    PE      53.9 mm
  Highest maximum 25.9C on 28th. Lowest minimum   5.9 on 15th.                                      PWB     -8.0 mm
  Minimum relative humidity:  50% on 28th.                                                          PWS     29.0 mm
* Rainfall 45.9 mm below average (77%), 10th driest July on record since 1929.                      PWD    -37.0 mm
* Abs min (5.9C) on 15th lowest since 1980 and 1984 (5.6C), 3rd lowest on record since 1979.
* Grass min (4.1C) on 15th lowest since 1989 (4.0C).                                         Piche:         49.1 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
  DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
  V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
  ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
  16 precipitation within sight, 17 thunderstorm no precip., 21 rain in past hour, 42 fog thinner in past hour,
  46 fog thicker in past hour, 60 intermittent sl. rain, 61 continuous sl. rain, 63 cont. moderate rain, 80 sl. rain shower,
  81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
  Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
  SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
  'Recording Atmospheric Depositions on Grass' page.
24 hour observations...
  Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
  Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
  Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
  PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
  s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
  3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
 

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August 2001

                               CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR AUGUST 2001
---------------------------------------------------------------------------------------------------------------------------
  -09GMT-->       ---Air Temperature---       --Soil temp--  --Earth temp-- -State Grd.-     Weather         Rain  Fr. Pch
DD N dd ff  V ww Temp  Dpt  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E C GrSS   Rain SLHTGF   Press   hrs  hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 1 SE  1  7 04 18.0 10.6  62 24.2 10.1  7.4 17.0 16.2 17.7 18.4 18.0 16.4  0 0 1  0    0.0 000000    1027   0.0  0.0  2.5
02 8 00  0  6 05 19.1 16.3  84 20.6 15.0 13.4 20.2 19.5 19.2 18.8 18.2 16.5  0 0 1  0    2.6 000000    1015   4.2  0.0  0.2
03 8 N   1  5 60 12.1 11.5  96 19.0 12.1 12.4 16.6 17.4 18.2 18.4 18.1 16.5  1 3 3  0    0.6 000000    1011   0.5  0.0  1.7
04 3 S   2  8 03 15.0 11.3  78 19.0 10.6  7.8 16.5 16.3 17.0 18.1 18.1 16.8  0 0 1  0    3.3 000t00    1014   0.2  0.0  1.3
05 6 W   1  7 05 15.0 12.3  84 19.5 11.0  8.3 17.0 16.3 17.0 17.8 17.8 16.7  1 0 1  0    7.3 000000    1015   4.4  0.0  2.0
06 8 NW  1  7 02 15.4 14.5  95 16.7 11.5 11.2 18.0 17.2 17.4 18.0 17.8 16.5  1 2 3  0    9.2 000000    1008   6.0  0.0  0.1
07 8 E   1  5 63 11.9 11.5  98 18.7 11.1  9.2 14.2 15.0 16.9 17.4 17.5 16.5  1 3 3  0    7.0 000000    1001   4.8  0.0  0.6
08 7 NW  1  6 01 14.0 12.2  87 17.8 11.7 11.1 16.0 15.7 16.2 17.1 17.3 16.5  1 1 3  0    1.6 000000    1000   2.0  0.0  1.1
09 7 N   2  7 05 13.6 11.2  85 17.5 10.3  8.4 16.0 15.7 16.2 17.2 17.3 16.3  1 1 3  0    0.0 000000    1013   0.0  0.0  1.5
10 5 NW  2  8 03 14.2 10.8  80 18.8  8.5  6.1 14.2 14.2 15.7 17.1 17.2 16.3  1 0 1  0    6.3 000000    1024   5.8  0.0  2.0
11 8 S   4  6 42 16.1 16.1 100 16.7 13.7 12.1 16.5 16.5 17.0 17.3 17.3 16.3  2 2 3  0    4.4 000002    1021   5.3  0.0  0.1
12 8 SW  3  2 46 15.7 15.7 100 17.0 15.2 15.0 16.7 16.5 16.5 17.1 17.0 16.3  2 3 3  0    6.1 000002    1014   7.8  0.0  0.2
13 8 S   3  5 02 17.0 16.8  99 18.1 15.0 14.8 17.0 16.8 16.8 17.1 16.9 16.2  1 2 3  0    0.3 000000    1011   0.2  0.0  0.5
14 7 SW  4  6 02 17.8 16.5  92 20.8 16.2 15.8 18.5 17.5 17.1 17.2 16.9 16.0  1 0 3  0    0.0 000000    1011   0.0  0.0  1.6
15 7 S   1  7 05 17.0 15.3  90 19.5 12.7 10.9 17.3 16.8 17.0 17.4 17.0 16.0  1 0 1  0   11.7 000000    1011   5.8  0.0  0.4
16 7 W   2  7 25 14.5 14.0  97 18.5 13.0 11.9 16.9 16.5 17.0 17.5 17.2 16.2  1 2 3  0    0.3 000000    1010   0.3  0.0  1.6
17 7 SW  2  6 16 15.9 14.5  91 18.1 13.3 12.0 17.0 16.6 17.0 17.5 17.2 16.2  1 2 3  0    3.6 000000    1015   1.0  0.0  1.1
18 8 00  0  7 61 14.5 12.1  86 16.3 13.4 12.4 16.0 16.3 17.0 17.5 17.2 16.1  1 3 3  0   14.5 000000    1012  10.0  0.0  0.3
19 7 00  0  6 10 16.3 16.1  99 19.7 14.1 13.6 17.0 16.5 16.7 17.2 17.2 16.2  1 2 3  0    0.0 000000    1001   0.0  0.0  1.0
20 7 SW  2  7 05 14.5 11.7  83 19.4 11.0  8.3 16.0 15.8 16.8 17.3 17.2 16.2  1 0 1  0    0.0 000000    1012   0.0  0.0  2.6
21 7 S   5  7 03 16.0 11.8  76 18.4 13.3 10.4 15.9 16.1 16.9 17.5 17.3 16.2  1 0 1  0    1.3 000000    1023   2.0  0.0  1.9
22 5 SW  1  7 05 15.9 12.9  82 19.5 10.8  7.5 15.0 14.8 16.0 17.0 17.2 16.2  1 1 1  0    0.0 000000    1021   0.0  0.0  0.7
23 7 S   1  7 05 15.5 12.2  81 19.0 11.6  9.0 16.0 15.5 16.2 17.1 17.0 16.2  1 0 1  0    0.1 000000    1016   0.0  0.0  0.9
24 8 NE  1  5 05 16.5 15.0  91 17.8 12.4  9.5 17.5 16.8 16.8 17.3 17.2 16.2  1 0 1  0    4.7 000000    1016   7.5  0.0  0.2
25 8 N   1  5 10 15.4 15.4 100 17.6 13.0 10.8 16.5 16.3 16.6 17.0 17.0 16.1  1 3 3  0    2.2 000000    1016   1.8  0.0  0.2
26 3 NE  2  7 05 14.7 12.1  85 17.5 11.0  7.8 15.5 14.8 16.0 16.8 16.8 16.2  1 1 1  0    0.0 000000    1020   0.0  0.0  1.5
27 4 N   2  8 03 13.6 11.2  85 16.7  9.3  5.5 14.0 14.2 14.7 16.8 16.8 16.1  1 0 1  0    0.0 000000    1027   0.0  0.0  1.7
28 1 S   1  8 01 14.8 11.9  69 21.8  8.5  5.8 13.9 13.8 15.7 16.7 16.7 16.1  1 0 1  0    0.0 000000    1023   0.0  0.0  2.1
29 5 SW  1  7 05 16.8 11.7  72 22.5 10.3  7.3 16.3 15.0 16.0 16.8 16.8 16.1  0 0 1  0    2.4 000000    1017   2.3  0.0  1.8
30 8 SW  1  6 10 13.2 12.8  98 16.2 12.2 10.2 15.6 16.1 17.0 17.1 17.0 16.0  1 2 3  0    7.2 000000    1012   3.0  0.0  0.4
31 7 N   2  7 01 12.6 11.7  94 17.1 11.8  9.0 14.4 15.0 16.0 16.8 16.8 16.2  1 2 3  0    0.0 000000    1014   0.0  0.0  1.3
---------------------------------------------------------------------------------------------------------------------------
Mean
   6             15.2 13.2  88 18.7 12.1 10.2 16.3 16.1 16.7 17.4 17.3 16.3                            1015
Total                                                                                   96.7                 74.9  0.0 35.1
---------------------------------------------------------------------------------------------------------------------------
(.)  Difference from 1991-2000 average used by the Weather Observers Network.                Rainfall was 130% of average
Air temperatures                         Weather (No. days occurrence)                       and 120% of 1971-2000 ave.
  Mean maximum     18.7    (-0.8)             Sleet/snow falling          0      ( 0.0)      Most in a day: 14.5 on 18th.
  Mean minimum     12.1    ( 0.0)             Snow lying (at 09GMT)       0      ( 0.0)      No. days with:
  Mean             15.4    (-0.4)             Hail  <5 mm                 0      [-0.2]      >=0.2 mm        20      (+ 5.2)
  No. days <0.0C      0    ( 0.0)             Hail >=5 mm                 0    [all hail]    >=1.0 mm        17      (+ 6.0)
  Mean grass min   10.2    (-0.1)             Thunder heard               1      (-0.3)      >=5.0 mm         8      (+ 2.6)
  Lowest grass min  5.5    (-0.1)             Gales                       0                  No. dry days    10      (- 1.1)
  No. days <0.0C      0    ( 0.0)             Fog (at 09GMT)              1
  Mean soil 30cm   17.4    (+0.2)                                                            Lysimeter:
                                                                                                    PE      41.7 mm
  Highest maximum 24.2C on 1st. Lowest minimum   8.5 on 10th & 28th.                                PWB     55.0 mm
  Minimum relative humidity:  55% on 1st.                                                           PWS     64.0 mm
* Rainfall 96.7 mm ranked 31st wettest on record since 1928. Drier than 2000 (132.4 mm).            PWD     -8.9 mm
* Mean temperature 15.4C equalled 1999 (15.4C) as coolest since 1993 (14.2C).
* Mean max 18.7C coolest since 1994 (18.0C) and ranked 10th on record since 1979.            Piche:         35.1 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
  DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
  V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
  ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
  16 precipitation within sight, 17 thunderstorm no precip., 25 shower rain in past hour, 42 fog thinner in past hour,
  46 fog thicker in past hr., 60 intermittent sl. rain, 61 continuous sl. rain, 63 cont. moderate rain, 80 sl. rain shower,
  81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
  Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
  SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
  'Recording Atmospheric Depositions on Grass' page.
24 hour observations...
  Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
  Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
  Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
  PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
  s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
  3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------
            

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September 2001

                               CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR SEPTEMBER 2001
---------------------------------------------------------------------------------------------------------------------------
  -09GMT-->       ---Air Temperature---       --Soil temp--  --Earth temp-- -State Grd.-     Weather         Rain  Fr. Pch
DD N dd ff  V ww Temp  Dpt  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E C GrSS   Rain SLHTGF   Press   hrs  hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 7 W   3  7 03 14.2 10.2  77 16.8 10.5  7.9 15.5 15.2 16.0 16.7 16.8 16.2  1 0 1  0    4.4 000000    1020   4.8  0.0  0.8
02 8 NW  1  7 01 15.3 14.3  93 17.3 14.2 14.2 17.2 16.4 16.5 16.8 16.8 16.1  1 2 3  0    1.5 000000    1015   2.9  0.0  0.9
03 7 NW  2  7 02 14.5 13.6  94 16.3 11.3 10.9 16.0 15.5 16.2 16.8 16.7 16.1  1 2 3  0    0.8 000000    1015   0.3  0.0  0.7
04 6 N   3  7 03 13.0 10.5  85 16.4 10.8  7.6 14.7 14.7 15.8 16.8 16.8 16.0  1 0 3  0    4.3 000000    1020   4.6  0.0  1.4
05 8 W   1  4 50 14.6 14.6 100 16.4 10.0  7.3 15.0 15.3 16.0 16.7 16.8 16.0  1 3 3  0    8.6 000000    1022   6.0  0.0  0.3
06 7 N   2  7 01 13.2 11.5  90 18.2 10.0  7.9 15.0 15.0 15.7 16.3 16.5 16.0  1 1 3  0    0.2 000000    1021   0.2  0.0  1.1
07 8 W   3  6 25 14.0 13.5  97 18.3 11.7 10.0 15.0 15.0 15.8 16.4 16.5 15.9  1 2 3  0    0.5 000000    1020   0.4  0.0  1.1
08 7 N   4  7 80 12.6 10.1  85 15.5 10.7  8.3 15.0 15.0 15.7 16.3 16.3 15.8  1 0 3  0     tr 000000    1019   0.0  0.0  2.4
09 7 N   4  7 01 12.0  6.8  70 15.1  9.3  6.8 13.0 13.4 14.8 16.1 16.3 15.8  1 0 0  0    0.0 000000    1023   0.0  0.0  1.7
10 7 N   2  7 02 12.2  8.6  79 14.5 10.5  8.8 14.3 14.3 15.0 15.9 16.2 15.8  1 0 1  0    0.1 000000    1024   0.0  0.0  0.8
11 8 NW  2  6 60 14.2 13.3  94 18.0 12.0 10.8 15.2 15.0 15.7 16.0 16.2 15.8  1 2 3  0    0.9 000000    1023   0.8  0.0  0.9
12 8 SW  5  6 60 13.9 10.5  80 14.5 12.4 10.6 14.0 14.4 15.2 16.0 16.1 15.8  1 0 3  0   18.0 000000    1014  13.2  0.0  0.6
13 7 W   5  6 80 10.8 10.0  95 14.7  9.6  6.1 12.3 12.7 14.0 15.2 15.8 15.7  1 2 3  0    1.9 000000    1001   2.1  0.0  1.3
14 6 NW  1  6 03 12.5 11.4  91 14.2  8.0  3.0 11.8 11.8 13.5 14.9 15.4 15.5  1 1 2  0    4.1 000002    1014   2.0  0.0  0.7
15 7 NW  3  7 05 12.0  9.7  86 15.5  9.2  5.6 12.4 12.4 13.5 14.7 15.2 15.3  1 1 3  0    0.8 000000    1015   1.0  0.0  1.1
16 7 NW  2  7 10 12.2  9.7  84 15.6  8.0  3.2 12.5 12.3 13.2 14.5 15.0 15.0  1 2 3  0    0.2 000000    1023   0.2  0.0  1.4
17 6 NE  3  8 01 11.5  7.6  77 13.0 10.5  6.4 12.7 12.8 13.6 14.6 15.1 15.1  1 0 1  0    0.0 000000    1027   0.0  0.0  2.1
18 8 NE  2  7 01 12.5 10.0  85 14.5 10.1  8.1 12.9 13.0 13.6 14.5 14.9 15.0  1 0 0  0    0.2 000000    1025   0.3  0.0  0.9
19 7 N   2  5 80 12.1 11.0  93 15.6 11.6  9.9 13.2 13.6 14.2 14.6 15.0 15.0  1 3 3  0    0.3 000000    1015   0.8  0.0  1.2
20 6 NE  1  7 05 12.7  9.8  82 15.7 11.4  9.3 13.1 13.4 14.4 14.8 15.0 14.9  1 0 1  0    0.0 000000    1018   0.0  0.0  1.1
21 5 NE  1  7 10 12.0 11.6  98 15.5  8.5  5.8 11.8 12.2 13.5 14.5 15.0 14.8  1 0 2  0    0.0 000002    1019   0.0  0.0  0.5
22 8 N   1  7 05 12.3 11.2  93 14.4 10.7  8.0 13.0 13.2 13.9 14.4 14.8 14.8  1 0 1  0     tr 000000    1020   0.0  0.0  0.7
23 1 E   2  7 03 11.4  8.2  80 14.7  8.6  5.3 10.7 11.2 12.8 14.2 14.6 14.8  1 0 1  0    0.5 000000    1020   0.4  0.0  1.1
24 7 NE  2  7 05 12.8 10.7  87 15.0 10.0  6.8 13.0 13.0 13.6 14.2 14.6 14.8  1 2 3  0    0.2 000000    1016   0.2  0.0  1.1
25 5 E   1  5 05 12.0 10.5  90 15.5 10.0  8.0 12.2 12.5 13.4 14.2 14.7 14.5  1 0 1  0    0.0 000000    1016   0.0  0.0  0.9
26 3 00  0  7 05 11.8  9.4  85 17.5  8.2  4.2 11.1 11.7 13.0 13.9 14.5 14.5  1 0 1  0    6.1 000000    1009   7.8  0.0  1.0
27 8 S   2  6 61 15.1 14.6  97 16.5 11.0  7.8 14.2 13.8 14.0 14.2 14.5 14.3  1 3 3  0    6.3 000000    1009   4.5  0.0  0.5
28 4 SE  2  7 03 16.5 12.9  79 22.4 15.1 13.5 15.4 14.8 14.8 14.6 14.6 14.3  1 1 3  0   18.5 000000    1006   3.0  0.0  2.1
29 7 SW  3  7 01 14.0 12.9  93 17.5 13.5 12.0 15.0 15.0 15.1 15.0 15.0 14.3  1 2 3  0    0.1 000T00    1006   0.0  0.0  2.2
30 7 S   6  5 80 14.7 12.5  87 16.7 13.6 12.3 14.4 14.4 14.8 15.0 15.0 14.7  1 3 3  0   19.7 0000G0     998   5.8  0.0  1.7

---------------------------------------------------------------------------------------------------------------------------
Mean
   7             13.1 11.0  88 16.1 10.7  8.2 13.7 13.8 14.6 15.3 15.6 15.3                            1016
Total                                                                                   98.2                 61.3  0.0 34.3
---------------------------------------------------------------------------------------------------------------------------
(.)  Difference from 1991-2000 average used by the Weather Observers Network.                Rainfall was 101% of average
Air temperatures                         Weather (No. days occurrence)                       and 107% of 1971-2000 ave.
  Mean maximum     16.1    (-1.2)             Sleet/snow falling          0      ( 0.0)      Most in a day:
  Mean minimum     10.7    (+0.5)             Snow lying (at 09GMT)       0      ( 0.0)      No. days with:
  Mean             13.4    (-0.4)             Hail  <5 mm                 0      [-1.4]      >=0.2 mm        21      (+ 5.8)
  No. days <0.0C      0    ( 0.0)             Hail >=5 mm                 0    [all hail]    >=1.0 mm        11      (- 1.9)
  Mean grass min    8.2    (+0.1)             Thunder heard               1      (+0.6)      >=5.0 mm         6      (- 0.6)
  Lowest grass min  3.0    (+0.3)             Gales                       1                  No. dry days     5      (- 3.6)
  No. days <0.0C      0    ( 0.0)             Fog (at 09GMT)              0
  Mean soil 30cm   15.3    (+0.1)                                                            Lysimeter:
                                                                                                    PE      37.1 mm
  Highest maximum 22.4C on 28th. Lowest minimum   8.0 on 14th.                                      PWB     61.1 mm
  Minimum relative humidity:  56% on 28th.                                                          PWS     65.8 mm
* Mean max 16.1C lowest since 1994 (15.1C). Ranked 4th lowest in records since 1979.                PWD     -4.6 mm
* Mean min 10.7C lowest since 1996 (10.0C) but ranked 7th highest in records. Lo min 8.0C
* warmest on September record. Mean 13.4C lowest since 1995 (13.3C) rank 11th lowest.        Piche:         34.3 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
  DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
  V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
  ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
  16 precipitation within sight, 17 thunderstorm no precip., 21 rain in past hour, 42 fog thinner in past hour,
  50 slight drizzle, 60 intermittent sl. rain, 61 continuous sl. rain, 63 cont. moderate rain, 80 sl. rain shower,
  81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
  Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
  SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
  'Recording Atmospheric Depositions on Grass' page.
24 hour observations...
  Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
  Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
  Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
  PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
  s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
  3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------

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October 2001

                               CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR OCTOBER 2001
---------------------------------------------------------------------------------------------------------------------------
  -09GMT-->       ---Air Temperature---       --Soil temp--  --Earth temp-- -State Grd.-     Weather         Rain  Fr. Pch
DD N dd ff  V ww Temp  Dpt  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E C GrSS   Rain SLHTGF   Press   hrs  hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 7 SW  7  5 80 13.2 12.3  94 16.0 12.6 11.1 13.5 14.0 14.4 15.0 15.0 14.6  1 2 3  0    0.0 000TG0     992   0.0  0.0  3.2
02 1 SW  6  6 05 14.1 11.1  82 16.2 13.4 12.1 13.0 13.4 14.0 14.7 14.9 14.8  1 0 0  0    0.0 000000     995   0.0  0.0  2.3
03 8 W   5  7 05 13.0 10.5  85 16.0 11.5  9.5 13.0 13.0 13.7 14.4 14.8 14.7  1 0 1  0     tr 000000    1005   0.0  0.0  1.3
04 6 S   4  7 03 12.9 11.2  89 16.5 12.0 10.5 12.8 13.2 13.8 14.3 14.8 14.6  1 0 3  0    2.1 000000    1008   2.2  0.0  1.8
05 8 S   5  7 10 14.8 14.3  97 18.2 12.7 11.8 14.4 14.1 14.1 14.5 14.6 14.5  1 3 3  0   10.5 000000    1000   3.6  0.0  2.4
06 3 S   6  6 05 13.9  9.6  76 16.6 11.6 10.1 12.1 12.8 13.8 14.4 14.8 14.5  1 1 3  0    3.2 0000G0     995   4.0  0.0  2.1
07 7 SW  3  7 05 12.9  9.8  81 14.6 11.0  9.1 11.6 12.1 13.2 14.2 14.6 14.5  1 2 3  0   11.0 000000     991   7.0  0.0  0.8
08 6 W   4  7 05 12.5 10.8  89 16.0  9.5  7.4 11.5 12.0 13.0 13.8 14.3 14.5  1 2 3  0    6.6 000000     990   6.2  0.0  0.9
09 7 NW  4  6 10 12.2 10.9  92 15.8 10.6  9.0 12.6 12.8 13.4 13.8 14.2 14.2  1 2 3  0    2.1 000000    1008   1.9  0.0  0.8
10 8 SW  5  4 60 13.7 13.5  99 14.5 10.9  8.1 13.4 13.4 13.5 13.9 14.2 14.2  1 3 3  0    4.7 000000    1016   4.0  0.0  0.4
11 8 SW  5  4 53 14.0 14.0 100 15.1 10.9  9.5 13.5 13.5 13.5 13.8 14.1 14.2  1 3 3  0    5.1 000000    1022   9.2  0.0  0.7
12 1 S   3  7 05 15.1 12.0  82 18.5 12.5 11.0 12.5 12.8 13.5 13.8 14.1 14.1  1 2 3  0    0.0 000000    1020   0.0  0.0  1.2
13 7 SE  1  7 10 13.6 12.5  93 16.3 12.1 10.6 13.7 13.7 14.0 14.2 14.2 14.1  1 0 1  0    2.8 000000    1020   3.3  0.0  0.5
14 8 00  0  4 60 14.0 14.0 100 17.2 11.8  9.6 13.5 13.7 14.0 14.2 14.2 14.1  1 3 3  0    1.1 000000    1013   3.1  0.0  1.2
15 7 S   4  7 80 15.0 12.8  87 17.0 12.8 11.7 14.0 14.0 14.2 14.3 14.5 14.1  1 2 3  0    2.5 000000    1002   2.1  0.0  2.0
16 7 S   5  6 02 13.7  9.8  78 16.3  9.8  7.9 11.4 12.0 13.0 13.8 14.2 14.1  1 2 3  0    0.0 000000    1017   0.0  0.0  3.9
17 7 E   2  7 05 15.1 11.6  80 19.3 11.8  9.0 12.6 12.5 13.0 13.8 14.1 14.1  1 0 0  0    2.2 000000    1013   3.8  0.0  3.0
18 2 S   4  7 05 13.5 10.0  80 16.8 11.5  8.8 12.2 12.8 13.5 13.8 14.0 14.1  1 2 3  0    0.0 000000    1006   0.0  0.0  2.5
19 7 E   5  7 03 12.8  8.6  76 15.5 10.3  6.4 11.1 11.5 12.5 13.3 13.9 14.0  1 0 1  0   15.6 000000    1006   7.6  0.0  1.0
20 8 S   1  6 21 11.2 10.8  97 15.0 10.5  8.3 12.0 12.2 12.6 13.2 13.6 13.9  1 2 3  0    0.1 000000    1002   0.0  0.0  0.3
21 7 00  0  7 02 10.2  9.8  97 12.0  7.1  3.4 10.8 10.6 11.5 12.7 13.5 13.8  1 1 1  0    0.0 000000    1006   0.0  0.0  0.1
22 2 S   2  7 10 10.3  9.7  96 16.2  9.3  5.0 10.2 11.1 12.0 12.7 13.2 13.7  1 1 2  0    1.1 000001    1009   2.2  0.0  0.9
23 6 S   4  7 80 13.1 12.0  93 16.5  9.6  6.5 11.9 11.8 12.5 12.8 13.2 13.7  1 2 3  0    4.0 000000    1005   2.6  0.0  1.5
24 5 SW  3  6 25 12.0 10.7  91 15.3 11.5  9.8 12.0 12.0 12.6 12.9 13.2 13.7  1 2 3  0     tr 000000    1010   0.0  0.0  1.2
25 8 S   6  6 02 14.0 11.2  83 14.6 10.3  7.8 12.5 12.3 12.5 13.2 13.2 13.5  1 1 3  0    5.1 0000G0    1013   2.5  0.0  1.2
26 8 SW  2  7 02 11.7  9.5  87 13.7 11.1  9.2 11.0 11.5 12.1 12.8 13.2 13.3  1 2 3  0    1.2 000000    1005   0.9  0.0  1.1
27 1 SW  2  6 05 10.5  9.1  91 15.3  8.7  4.8  9.0  9.8 11.4 12.4 13.2 13.5  1 2 1  0    0.2 000000    1013   0.2  0.0  0.8
28 1 00  0  7 10  8.4  8.2  99 16.1  6.8  2.3  8.2  9.4 11.2 12.2 12.9 13.4  1 2 3  0    0.0 000000    1025   0.0  0.0  1.0
29 8 SW  5  7 05 11.2  9.6  90 14.4  8.4  4.0 10.0 10.3 11.1 11.9 12.6 13.2  1 1 1  0    0.0 000000    1024   0.0  0.0  1.6
30 1 S   6  6 05 14.3 12.1  87 14.5 11.2 10.3 12.1 12.1 12.1 12.2 12.5 13.2  1 0 0  0    4.2 0000G0    1008   3.5  0.0  1.3
31 3 NW  4  7 05  7.6  5.4  86 12.7  6.4  2.5  8.3  9.7 11.3 12.1 12.6 13.0  1 2 3  0    0.3 005000    1021   0.3  0.0  0.9
---------------------------------------------------------------------------------------------------------------------------
Mean
   6             12.7 10.9  89 15.8 10.7  8.3 11.9 12.3 12.9 13.5 13.9 14.0                            1008
Total                                                                                   85.7                 70.2  0.0 43.9
---------------------------------------------------------------------------------------------------------------------------
(.)  Difference from 1991-2000 average used by the Weather Observers Network.                Rainfall was 74% of average
Air temperatures                         Weather (No. days occurrence)                       and  76% of 1971-2000 ave.
  Mean maximum     15.8    (+2.1)             Sleet/snow falling          0      (-0.2)      Most in a day: 15.6mm on 19th.
  Mean minimum     10.7    (+3.2)             Snow lying (at 09GMT)       0      ( 0.0)      No. days with:
  Mean             13.2    (+2.6)             Hail  <5 mm                 0      [-0.4]      >=0.2 mm        20      (+ 0.6)
  No. days <0.0C      0    ( 0.0)             Hail >=5 mm                 1    [all hail]    >=1.0 mm        18      (+ 2.1)
  Mean grass min    8.3    (+3.2)             Thunder heard               1      (+0.1)      >=5.0 mm         6      (- 1.9)
  Lowest grass min  2.3    (+3.3)             Gales                       4                  No. dry days     8      (- 0.2)
  No. days <0.0C      0    (-2.9)             Fog (at 09GMT)              0
  Mean soil 30cm   13.5    (+1.8)                                                            Lysimeter:
                                                                                                    PE      11.1 mm
  Highest maximum 19.3C on 17th. Lowest minimum   6.4 on 31st.                                      PWB     74.6 mm
  Minimum relative humidity:  60% on 17th.                                                          PWS     74.8 mm
* Monthly mean temperature 13.2C warmest on record for October.                                     PWD     -0.2 mm
* Mean min 10.7C warmest on Oct record. Mean max 15.8C 2nd only to Oct 1995 that was 16.0C.
* Rainfall 85.7mm lowest in Oct since 1997 (53.7mm) and ranked 20th lowest since 1928.       Piche:         43.9 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
  DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
  V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
  ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
  16 precipitation within sight, 17 thunderstorm no precip., 21 rain in past hour, 42 fog thinner in past hour,
  53 continuous moderate drizzle, 60 intermittent sl. rain, 61 cont. sl. rain, 63 cont. moderate rain, 80 sl. rain shower,
  81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
  Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
  SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
  'Recording Atmospheric Depositions on Grass' page.
24 hour observations...
  Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
  Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
  Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
  PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
  s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
  3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------

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November 2001

                               CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR NOVEMBER 2001
---------------------------------------------------------------------------------------------------------------------------
  -09GMT-->       ---Air Temperature---       --Soil temp--  --Earth temp-- -State Grd.-     Weather         Rain  Fr. Pch
DD N dd ff  V ww Temp  Dpt  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E C GrSS   Rain SLHTGF   Press   hrs  hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 5 S   1  7 05  8.7  7.7  93 13.6  5.0  0.4  7.6  8.4 10.0 11.3 12.3 12.9  1 1 1  0    0.0 000000    1037   0.0  0.0  1.0
02 8 W   2  7 02 11.0  8.1  83 14.7  8.4  4.1 10.0 10.2 10.8 11.3 12.1 12.9  1 0 1  0    0.0 000000    1039   0.0  0.0  1.0
03 8 SW  3  7 05 11.4  9.8  90 11.4  9.0  6.8 10.2 10.2 10.9 11.5 12.1 12.8  1 0 1  0    1.1 000000    1035   2.5  0.0  0.6
04 7 NW  2  7 01  8.5  7.0  90 11.5  4.5  1.1  8.5  9.0 10.2 11.2 11.9 12.6  1 2 3  0    0.7 000000    1027   0.3  0.0  0.5
05 7 W   2  7 03  5.8  3.9  88 11.5  3.4  0.8  6.3  7.3  9.2 10.8 11.8 12.8  1 1 1  0    1.6 000000    1027   3.6  0.0  1.0
06 7 W   2  7 02  9.5  7.8  89 11.0  5.8  5.8  9.3  9.6 10.1 10.6 11.4 12.3  1 2 3  0    6.4 000000    1017   7.8  0.0  0.2
07 8 NW  4  7 02 10.3  9.7  96 10.5  8.7  6.9 10.0 10.2 10.5 10.8 11.4 12.2  1 2 3  0    9.6 000000    1012   9.5  0.0  0.7
08 6 N   6  7 01  5.2  0.3  70  6.0  4.5  2.5  6.4  7.8  9.5 10.6 11.3 12.1  1 1 4  0    0.3 s050G0    1007   0.3  0.0  4.1
09 4 NE  4  7 01  4.5 -2.2  62  7.7  3.4  1.4  3.8  5.2  7.5  9.3 10.8 12.0  1 0 0  0    0.1 003000    1027   0.5  0.0  1.4
10 8 W   2  2 46  6.8  6.8 100 10.8  2.1 -1.5  6.4  6.5  7.3  8.8 10.0 11.8  1 3 3  0    0.6 000002    1030   0.5  0.0  0.3
11 8 N   1  6 10 10.8 10.8 100 13.3  6.8  3.5  9.4  9.2  9.0  9.3 10.0 11.3  1 2 3  0    9.2 000000    1029   8.0  0.0  0.3
12 8 NW  1  6 52 10.7 10.7 100 12.1  9.5  6.2 10.0  9.9  9.8 10.0 10.2 11.3  1 3 3  0    1.7 000000    1016   2.8  0.0  0.7
13 7 NE  5  7 05  5.0  0.2  72  8.4  4.4  2.4  5.8  7.3  9.0 10.0 10.2 11.3  1 1 4  0    0.7 004000    1029   1.3  0.0  1.4
14 2 NE  1  7 10  7.7  7.1  96 11.0  2.1 -1.7  7.0  7.4  8.0  9.1 10.2 11.3  1 2 3  0    0.0 000000    1036   0.0  0.0  0.4
15 3 NW  1  7 05  7.0  5.9  93 11.5  4.0  0.0  6.5  7.0  7.8  8.9 10.0 11.2  1 1 1  0    0.0 000000    1040   0.0  0.0  0.5
16 8 00  0  7 05  9.4  8.2  92 10.0  7.0  4.8  9.0  9.0  9.0  9.2  9.9 11.1  1 1 1  0     tr 000000    1042   0.0  0.0  0.4
17 8 00  0  7 05  7.3  6.4  94  9.5  7.0  6.3  8.1  8.5  9.1  9.5 10.0 11.0  1 1 3  0    0.0 000000    1037   0.0  0.0  0.7
18 8 00  0  7 05  7.1  5.3  88  8.2  6.7  5.9  8.0  8.3  9.0  9.4 10.0 10.9  1 0 1  0    2.3 000000    1029   3.2  0.0  0.3
19 7 00  0  4 42  7.6  7.6 100  9.8  6.2  4.7  8.0  8.2  8.8  9.3 10.0 10.8  1 2 3  0     tr 000000    1027   0.0  0.0  0.1
20 8 SW  2  7 10  8.7  8.3  97 11.6  5.2  0.3  7.7  8.0  8.5  9.2 10.0 10.8  1 2 3  0    0.4 000000    1028   0.5  0.0  0.7
21 8 SW  4  5 10 11.6 11.2  98 12.0  8.7  8.3 10.0  9.8  9.6  9.8 10.1 10.8  1 2 3  0    4.9 000000    1024   7.0  0.0  0.5
22 7 N   1  7 01  7.4  5.4  87  9.8  6.6  3.6  8.5  9.0  9.8 10.0 10.3 10.6  1 2 3  0    0.0 000000    1025   0.0  0.0  1.0
23 8 SW  1  7 05  6.2  4.1  86 10.6  3.9  0.2  6.7  7.4  8.5  9.4 10.1 10.8  1 0 1  0    1.4 000000    1028   4.5  0.0  0.4
24 8 SW  1  2 46 10.6 10.6 100 12.1  6.2  6.0 10.0  9.6  9.5  9.6 10.0 10.8  1 3 3  0    9.5 000001    1025   7.3  0.0  0.1
25 8 NW  3  5 60  9.1  8.9  99  9.1  9.1  8.5 11.0 11.0 10.5 10.1 10.1 10.8  1 3 3  0    2.5 000000    1015   2.0  0.0  0.3
26 1 00  0  7 04  2.7  2.4  98  9.0  1.8 -2.6  3.5  5.2  7.5  9.2 10.2 10.8  1 2 7  0    3.8 000000    1018   4.5  0.0  0.9
27 8 SW  6  5 61  9.0  8.0  93  9.4  2.7 -1.5  7.2  7.0  7.3  8.4 10.0 10.7  1 3 3  0    2.9 004000     998   2.0  0.0  0.6
28 7 W   2  7 05  6.5  5.1  91 11.8  4.2  0.8  5.5  6.0  7.2  8.0  9.2 10.3  1 2 1  0   31.6 000000    1015  16.0  0.0  0.6
29 8 SW  4  3 51 11.8 11.8 100 12.7  6.5  5.1 10.4 10.0  9.0  9.0  9.0 10.0  1 3 3  0   15.0 000003    1007  10.0  0.0  0.2
30 8 S   5  4 61 12.7 12.7 100 13.0 10.0  6.5 11.3 11.0 10.2 10.0 10.2 10.2  2 3 3  0    1.4 000000     999   3.6  0.0  0.3

---------------------------------------------------------------------------------------------------------------------------
Mean
   7              8.4  7.0  92 10.8  5.8  3.2  8.1  8.4  9.1  9.8 10.5 11.4                            1024
Total                                                                                  107.7                 97.7  0.0 21.2
---------------------------------------------------------------------------------------------------------------------------
(.)  Difference from 1991-2000 average used by the Weather Observers Network.                Rainfall was 83% of average
Air temperatures                         Weather (No. days occurrence)                       and  86% of 1971-2000 ave.
  Mean maximum     10.8    (+0.4)             Sleet/snow falling          1      (+0.6)      Most in a day: 31.6 mm on 28th
  Mean minimum      5.8    (+0.7)             Snow lying (at 09GMT)       0      ( 0.0)      No. days with:
  Mean              8.3    (+0.6)             Hail  <5 mm                 3      [-0.1]      >=0.2 mm        21      (- 1.5)
  No. days <0.0C      0    (-1.3)             Hail >=5 mm                 1    [all hail]    >=1.0 mm        16      (- 1.4)
  Mean grass min    3.3    (+0.8)             Thunder heard               0      (-0.9)      >=5.0 mm         6      (- 3.1)
  Lowest grass min -2.6    ( 0.0)             Gales                       1                  No. dry days     6      (+ 1.9)
  No. days <0.0C      4    (-5.4)             Fog (at 09GMT)              2
  Mean soil 30cm    9.8    (+1.3)                                                            Lysimeter:
                                                                                                    PE      13.0 mm
  Highest maximum 14.7C on 2nd. Lowest minimum   1.8 on 26th.                                       PWB     94.7 mm
  Minimum relative humidity:  58% on 8th.                                                           PWS     94.8 mm
* Warmest Nov since 1997. Mean max 10.8C ranked 5th warmest since 1979 but 1994 was 12.4C.          PWD     -0.1 mm
* Mean min 5.8C ranked 4th warmest but 1994 was 7.9C. Mean 8.3C 4th warmest but 1994 was 10.1C.
* With 107.7 mm was driest Nov since 1995 with 65.1 mm. Ranked 27th driest since 1928.       Piche:         21.4 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
  DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
  V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
  ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
  16 precipitation within sight, 17 thunderstorm no precip., 21 rain in past hour, 42 fog thinner in past hour,
  46 fog thicker in past hr., 51 continuous slight drizzle, 52 intermittent sl. dr., 60 intermittent sl. rain,
  61 cont. sl.rain, 81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
  Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
  SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
  'Recording Atmospheric Depositions on Grass' page.
24 hour observations...
  Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
  Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
  Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
  PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
  s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
  3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------

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December 2001

                               CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR DECEMBER 2001
---------------------------------------------------------------------------------------------------------------------------
  -09GMT-->       ---Air Temperature---       --Soil temp--  --Earth temp-- -State Grd.-     Weather         Rain  Fr. Pch
DD N dd ff  V ww Temp  Dpt  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E C GrSS   Rain SLHTGF   Press   hrs  hrs Evap
---------------------------------------------------------------------------------------------------------------------------
01 8 NW  2  7 10  8.1  7.7  97  8.8  8.1  5.1  9.0  9.8 10.1 10.2 10.0 10.0  1 2 3  0    0.2 000000    1006   0.0  0.0  0.7
02 7 SE  2  7 03  5.6  2.1  78  8.0  1.5 -2.7  5.0  5.9  7.6  9.0 10.0 10.2  1 1 4  0    0.0 000000    1024   0.0  0.0  2.0
03 6 S   4  7 05  7.4  3.9  79 10.3  4.2 -1.1  4.8  5.3  6.7  8.0  9.5 10.2  1 0 0  0    9.1 0000G0    1016   6.5  0.0  1.9
04 6 W   3  7 05  6.0  4.4  89 11.6  5.8  2.1  5.8  6.9  8.0  8.4  8.9 10.1  1 2 3  0    2.9 000000    1007   4.1  0.0  1.4
05 7 SW  5  5 10 11.3 10.3  94 11.3  4.8  0.0  8.5  7.9  7.4  7.9  8.7 10.0  1 2 3  0    0.6 000000     999   0.0  0.0  0.2
06 8 00  0  7 04  5.3  4.6  95 11.5  4.3  0.1  5.5  6.1  7.2  8.0  8.7  9.9  1 2 3  0    3.0 000000    1030   5.2  0.0  1.1
07 8 S   2  7 60 11.1 10.5  96 11.6  5.3  4.2  9.3  9.0  8.4  8.3  8.7  9.9  1 3 3  0    0.5 000000    1031   0.5  0.0  1.1
08 6 00  0  7 04  6.5  3.7  82 12.4  6.1  1.1  6.7  8.0  8.6  8.8  9.2  9.9  1 1 1  0    0.0 000000    1037   0.0  0.0  1.2
09 4 00  0  7 04  4.1 -4.2  55  9.2  3.0 -2.7  2.5  4.2  6.2  7.8  8.7  9.8  3 0 5  0    0.0 000000    1038   0.0  0.0  1.2
10 0 00  0  7 04  4.6 -4.6  51 12.0  1.3 -3.2  1.5  2.9  5.0  6.5  8.3  9.8  3 0 5  0    0.0 000000    1038   0.0  0.0  2.2
11 0 00  0  7 04  6.5  1.5  71 12.3  4.6 -0.2  2.6  3.6  5.2  6.2  7.7  9.5  1 0 1  0    0.0 000000    1040   0.0  0.0  1.7
12 0 NE  2  8 04  8.6  3.0  75 10.2  4.7  0.2  3.4  4.1  5.2  6.1  7.3  9.1  1 0 1  0    0.0 000000    1039   0.0  0.0  1.4
13 1 E   3  7 04  5.0  2.5  84  7.8  4.6  1.3  2.7  3.5  5.0  5.9  7.2  8.9  1 0 5  0    0.0 000000    1036   0.0  0.0  0.6
14 1 NE  1  7 04  2.0 -2.4  73  5.9  2.0 -3.2  1.5  3.0  4.5  5.6  7.0  8.7  1 4 5  0    0.0 000000    1040   0.0  4.5  1.2
15 1 E   3  7 04  2.0 -0.8  82  5.1 -1.3 -6.5  0.5  1.7  3.2  4.8  6.5  8.6  3 0 7  0    0.1 000000    1042   0.0  5.2  0.6
16 7 E   1  7 04  4.5  4.0  97  6.1  2.0 -1.1  3.5  3.8  4.2  4.9  6.2  8.3  1 2 3  0    0.0 000000    1043   0.0  0.0  0.8
17 1 NE  1  7 04  0.1 -1.1  92  5.5 -0.7 -5.5  0.8  1.5  3.8  4.7  6.3  8.1  1 0 7  0    0.5 000000    1043   0.7  3.8  0.4
18 7 00  0  5 60  4.8  4.8 100  6.0  0.2 -4.1  3.2  3.5  4.0  4.6  5.8  7.8  1 3 3  0    1.8 000000    1043   3.8  0.0  0.1
19 7 NW  1  7 04  4.0  3.8  98  7.0  3.4 -0.2  3.8  4.2  5.0  5.1  6.0  7.6  1 2 3  0    0.3 000000    1037   1.4  0.0  0.3
20 5 00  0  7 04 -0.4 -1.3  94  6.5 -0.9 -5.0  1.4  2.6  4.5  5.2  6.2  7.8  1 2 5  0    0.0 000000    1035   0.0  5.0  0.9
21 8 NW  3  7 10  6.6  4.2  85  7.5 -0.4 -2.1  4.3  4.5  4.6  4.9  6.0  7.8  1 2 5  0    1.3 s00000    1018   2.0  0.0  1.5
22 3 NE  4  8 01  2.3 -4.1  63  3.7  2.0 -1.2  2.0  3.2  4.3  5.2  6.2  7.8  1 0 0  0     tr 000000    1018   0.0  0.0  2.0
23 7 W   1  7 87  0.8 -0.6  90  7.3 -0.8 -5.2  1.0  1.8  3.1  4.3  5.8  7.5  3 5 9  0    6.6 003000    1023   6.1  6.2  0.8
24 8 NW  3  7 10  7.3  6.6  96  8.5  0.8 -1.6  5.0  4.9  4.8  4.8  5.6  7.5  1 2 3  0    7.1 000000    1012   6.2  0.0  0.2
25 7 N   4  6 85  3.5  1.7  88  5.0  2.8  0.8  4.1  5.0  5.4  5.5  6.0  7.2  1 2 4  0   12.5 s04000    1002   7.6  0.0  0.5
26 7 W   1  7 85 -0.3 -0.6  98  6.5 -0.5 -4.1  1.7  2.5  3.8  4.8  6.2  7.3  7 7 9  6    4.8 sL3000    1011   5.3  5.5  0.8
27 8 W   2  7 02  6.5  6.1  97  8.3 -0.3 -1.3  4.3  4.0  4.0  4.3  5.4  7.2  5 2 6  0    1.3 000000    1003   0.3  0.0  0.6
28 6 W   4  7 02  3.5  0.4  81  5.5  3.4 -0.2  3.2  4.3  5.2  5.2  5.8  7.1  1 2 4  0    0.6 000000    1006   0.3  0.0  0.6
29 6 N   3  8 22  1.6 -1.5  80  3.9  0.5 -2.9  1.6  2.7  4.0  4.7  5.8  7.2  1 2 9  0    1.8 s04000    1002   1.8  0.0  0.8
30 7 N   1  7 22  1.4  0.6  94  3.3  0.7 -3.8  1.0  1.8  3.0  4.1  5.3  7.1  6 7 9  2    1.1 sL5000    1010   0.6  0.0  1.2
31 2 00  0  8 04 -1.0 -3.2  85  4.4 -1.5 -6.0  0.6  1.5  2.6  3.5  5.0  6.9  6 6 9  1    0.0 0L0000    1032   0.0 10.5  0.4
---------------------------------------------------------------------------------------------------------------------------
Mean
   5              4.5  2.0  85  7.8  2.2 -1.6  3.6  4.3  5.3  6.0  7.1  8.5                            1025
Total                                                                                   56.1                 52.4 40.9 30.4
---------------------------------------------------------------------------------------------------------------------------
(.)  Difference from 1991-2000 average used by the Weather Observers Network.                Rainfall was 45% of average
Air temperatures                         Weather (No. days occurrence)                       and  49% of 1971-2000 ave.
  Mean maximum      7.8    (-0.1)             Sleet/snow falling          5      (+2.4)      Most in a day: 12.5mm on 25th
  Mean minimum      2.2    (-0.9)             Snow lying (at 09GMT)       3      (+1.8)      No. days with:
  Mean              5.0    (-0.5)             Hail  <5 mm                 4      [-0.1]      >=0.2 mm        18      (- 2.4)
  No. days <0.0C      8    (+2.4)             Hail >=5 mm                 10    [all hail]   >=1.0 mm        12      (- 4.4)
  Mean grass min   -1.6    (-2.2)             Thunder heard               0      (-0.8)      >=5.0 mm         4      (- 5.0)
  Lowest grass min -6.5    (+0.2)             Gales                       1                  No. dry days    11      (+ 6.0)
  No. days <0.0C     22    (+8.3)             Fog (at 09GMT)              0
  Mean soil 30cm    6.0    (-0.1)                                                            Lysimeter:
                                                                                                    PE      -5.1 mm
  Highest maximum 12.4C on 8th. Lowest minimum  -1.5 on 31st.                                       PWB     61.2 mm
  Minimum relative humidity:  47% on 10th.                                                          PWS     61.4 mm
* Driest Dec since 1996 (43.5 mm) ranked 12th driest in records since 1928.                         PWD     -0.2 mm
* Mean 5.0C and mean min coldest since 1996 (3.9C and 1.2C respectively). Most airfrosts 8
* since the 12 in 1996 but ground frosts 22 joint highest with 1989.                         Piche:         30.4 ml
---------------------------------------------------------------------------------------------------------------------------
Key: Observations at 09GMT...
  DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
  V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
  ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
  16 precipitation within sight, 17 thunderstorm no precip., 22 snow in past hour, 42 fog thinner in past hour,
  50 slight drizzle, 60 intermittent sl. rain, 61 continuous sl. rain, 63 cont. moderate rain, 80 sl. rain shower,
  81 mod. or heavy rain shower, 83 slight sleet shower, 86 moderate snow shower, 87 shower of ice pellets.
  Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
  SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
  'Recording Atmospheric Depositions on Grass' page.
24 hour observations...
  Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
  Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
  Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
Monthly observations...
  PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
Weather: days with...
  s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 1 ice crystals, 2 snow grains,
  3 snow pellets, 4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog code.
---------------------------------------------------------------------------------------------------------------------------

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Annual 2001


  Monthly and annual summary statistics at Llansadwrn, Anglesey for 2001

  (.)  Difference from 1991-2000 average.                                                             Total rainfall 866.0 mm
                                                                                                      was 88% of average
  Air temperatures                              Weather (No. days occurrence)                         Most in a day: 31.6 (Nov 28),
     Mean maximum     13.0    (-0.3)                  Sleet/snow falling         18      (+5.2)       and 26.5 mm (Feb 11) 
     Mean minimum      6.8    (-0.1)                  Snow lying (at 09GMT)       5      (+1.6)      
     Mean              9.9    (-0.2)                  Hail  <5 mm                17     [- 4.7]       No. of days with:
     No. days <0.0C     28    (-8.2)                  Hail >=5 mm                 4    [all hail]     >=0.2 mm       206      (- 1)
     Mean grass min    4.4    (-0.5)                  Thunder heard               8      (-0.3)       >=1.0 mm       154      (- 4)
     Lowest grass min-10.2   (- 1.9)                  Gales                      10                   >=5.0 mm        58      (-17)
     No. days <0.0C     89   (+20.9)                  Fog (at 09GMT)              5                   No. dry days   114      (+ 8)
                                                                                                      Lysimeter:
                                                                                                             PE     297.8 mm
     Highest maximum  25.9 on Jul 28th. Lowest minimum  -5.0 on Mar 4th.                                     PWB    568.2 mm
     Minimum relative humidity:  44% on  Mar 10th.                                                           PWS    715.0 mm
  *  Driest year with 886.0 mm since 1996 (793.7 mm) and ranked 9th driest in records since 1929.            PWD   -146.8 mm
     Coldest year and with most frosts since 1996.                                                    Piche:        430.3 ml
  -----------------------------------------------------------------------------------------------------------------------------
  Annual summaries for 2001 (No. days occurrence at 09 GMT).

  Cloud cover                         Wind direction            Wind speed          Visibility   Code        Description

  Cloud obscured           0          N            36           Calm        38      <100 m          0        Dense fog        0
  8/8 cloud              120          NE           49           Force 1-3  255      100-190 m       1        Thick fog        0
  6/8 to 7/8             143          E            24           Force 4-5   58      200-390 m       2        Fog              5
  3/8 to 5/8              51          SE           17           Force 6-7   14      400-900 m       3        Mod. fog         2
  1/8 to 2/8              42          S            65           Force 8-12   0      1.0-1.9 km      4        Very poor       16
  Sky cloudless            9          SW           65                               2.0-3.9 km      5        Poor            49
                                      W            38           Check      365      4.0-9.0 km      6        Moderate        55
  Check                  365          NW           33                               10 km           7        Good           238
                                      Calm         38                                   or more
                                                                                                             Check          365
                                      Check       365

  For information on the state of the grass, ground and concrete
  codes consult the 'Recording Atmospheric Depositions on Grass' page.

  State of grass (Atmospheric depositions on grass)

  Cod  0   1   2   3  4    5        6    7    8     9 Check

  Jan  0   0   0  13  2    5        0   11    0     0   31
  Feb  1   0   3  11  4    1        2    5    0     1   28
  Mar  1   3   2  11  6    1        1    5    0     1   31
  Apr  0   5   0  17  8    0        0    0    0     0   30
  May  1  17   0  13  0                                 31
  Jun  7  10   1  12  0    0                            30
  Jul  4  11   2  14  0    0                            31
  Aug  0  15   0  16                                    31
  Sep  2   8   2  18                                    30
  Oct  3   6   1  21                                    31
  Nov  1   9   0  17  2    0        0    1              30
  Dec  2   3   0   9  3    6        2    2    0     4   31

  Yr  22  87  11 172 25   13        5   24    0     6  365

  State of ground

  Cod  0   1   2   3  4    5        6    7    8     9 Check

  Jan  0  18   0  12  0    0        1    0              31
  Feb  0  21   2   4  0    0        0    1              28
  Mar  0  25   0   5  0    1                            31
  Apr  0  28   2   0  0    0        0                   30
  May  9  22                                            31
  Jun 18  12                                            30
  Jul 12  19                                            31
  Aug  4  25   2                                        31
  Sep  0  30   0                                        30
  Oct  0  31   0                                        31
  Nov  0  29   1   0                                    30
  Dec  0  23   0   4  0    1        2    1    0         31

  Yr  43 283   7  25  0    2        3    2    0     0  365

  State of concrete

  Cod  0   1   2   3  4    5        6    7    8     9 Check

  Jan  5   4  12   2  0    4        4    0              31
  Feb  9   1   9   6  1    0        1    1              28
  Mar 13   1  11   5  0    0        1                   31
  Apr 13   2  10   5  0    0                            30
  May 23   1   3   4                                    31
  Jun 23   4   3   0                                    30
  Jul 21   3   1   6                                    31
  Aug 14   4   8   5                                    31
  Sep 14   4   8   4                                    30
  Oct  7   5  15   4                                    31
  Nov  5   7  11   7                                    30
  Dec  9   2  13   2  1    1        1    2              31

  Yr 156  38 104  50  2    5        7    3    0     0  365


These pages are designed and written by Donald Perkins © 1998 - 2001

Page dated 1 January 2001:

http://www.llansadwrn-wx.co.uk

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