Natural siphon autographic raingauge used at this weather station.

Llansadwrn (Anglesey) Weather
Daily Observations 1999

at 0900 GMT


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Logo: Llansadwrn Weather - Melin Llynnon, Ynys Môn



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  • Observations are subject to verification and amendment.

    January 1999

                              CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JANUARY 1999
    ------------------------------------------------------------------------------------------------------------------------
      -09GMT-->      -Air Temperature-       --Soil temp--  --Earth temp-- -State Grd.-       Weather         Rain  Fr. Pch
    DD N dd ff  V ww Temp  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E  C Gr SS   Rain SLHTGF   Press   hrs  hrs Evap
    ------------------------------------------------------------------------------------------------------------------------
    01 4 18  5  7 02  7.8  71  8.9  6.4  2.9  4.2  4.7  5.5  5.8  6.5  8.0  1  0  0  0   16.1 0040G0   993.8   5.8  0.0  1.9
    02 7 22  5  6 02  7.1  77  7.1  5.5  4.8  5.0  5.5  5.7  6.2  6.5  7.8  1  1  3  0    7.8 0000G0   982.1   6.2  0.0  1.6
    03 6 36  1  5 21  4.2  97 11.2  3.3  2.9  4.5  4.8  5.5  5.9  6.5  7.8  2  3  3  0    2.6 0000G0   992.1   5.9  0.0  1.4
    04 7 22  6  6 01  9.0  75 11.5  4.2  1.8  6.5  6.5  6.5  6.3  6.5  7.8  1  1  0  0   14.5 0000G0   992.5   6.3  0.0  1.6
    05 8 18  6  5 63 11.5  95 11.6  6.1  5.5  9.5  8.3  7.0  6.8  6.9  7.9  2  3  3  0   31.2 0000G0  1000.1   6.8  0.0  0.2
    06 8 22  1  5 60  6.7  98  7.3  6.6  6.2  7.5  7.9  8.0  7.8  7.5  7.8  2  3  3  0    1.0 000000  1004.2   7.8  0.0  0.1
    07 5 22  2  7 02  5.6  95  7.6  3.8 -0.5  5.0  5.6  6.5  7.2  7.5  7.8  1  2  1  0    8.6 004000  1004.2   7.2  0.0  0.3
    08 6 00  0  7 01  2.0  98  6.5  1.5 -2.0  2.5  4.0  5.5  6.5  7.2  7.9  1  2  5  0     tr 000000   999.3   6.5  0.0  0.5
    09 3 36  1  7 03  1.9  93  6.0  1.0 -2.4  1.5  2.8  4.6  5.8  6.8  8.0  1  2  7  0     tr 003000  1015.4   5.8  0.0  0.3
    10 0 45  1  7 04 -1.0 100  4.6 -1.7 -6.3  0.5  1.5  3.1  4.9  6.2  7.9  3  4  7  0    0.0 000000  1017.8   4.9 10.7  0.7
    11 1 45  1  7 04  1.8  87  6.1 -1.0 -4.8  0.2  1.0  2.5  3.4  5.3  7.7  3  4  7  0   22.5 000000  1020.1   3.4  0.0  1.3
    12 6 32  1  6 21  6.1  98  6.4  0.4 -4.2  3.3  2.8  2.8  3.2  4.9  7.5  2  2  4  0    1.0 000000   996.8   3.2  0.0  0.3
    13 8 22  1  5 61  4.5  92  8.5  2.1 -1.3  3.0  3.0  3.2  4.0  4.8  7.2  2  3  3  0    3.7 000000  1006.3   4.0  0.0  0.9
    14 2 27  1  6 03  2.8  89  9.4  2.9  0.5  2.2  3.2  4.1  4.4  5.0  6.9  1  1  1  0    8.2 0000G0  1004.6   4.4  0.0  1.6
    15 8 22  7  5 63  8.0  94 10.5  2.6  1.2  6.5  6.2  5.5  5.2  5.3  7.0  2  3  3  0   19.3 0000G0   989.5   5.2  0.0  0.5
    16 5 27  5  7 01  3.5  71  6.0  2.3  0.0  2.7  4.0  5.3  5.8  5.9  7.0  1  1  3  0    0.9 000000   987.8   5.8  0.0  2.0
    17 6 22  4  7 03  4.6  77  6.7  2.9  0.6  2.3  3.0  4.0  4.9  5.6  6.9  1  2  4  0    3.7 004000   993.8   4.9  0.0  1.0
    18 8 22  5  7 21  5.5  87 10.2  3.7  1.6  3.8  3.7  4.0  4.5  5.4  7.0  2  2  3  0    9.5 0000G0  1004.6   4.5  0.0  1.1
    19 7 22  4  5 63 10.0  93 10.2  6.7  4.4  8.1  7.3  6.0  5.7  5.7  7.0  2  3  3  0   13.1 000000   995.1   5.7  0.0  0.7
    20 6 22  4  6 21  8.3  92  9.5  7.6  6.7  7.2  7.2  6.9  6.5  6.3  6.9  2  2  3  0     tr 000000  1000.5   6.5  0.0  0.4
    21 1 22  1  7 04  2.4  95  7.8  1.5 -3.2  1.5  3.0  5.0  5.8  6.3  6.9  1  2  7  0    0.1 000000  1020.4   5.8  0.0  0.5
    22 6 22  1  7 03  2.5  91  7.6  1.0 -3.6  0.8  1.7  3.5  4.7  5.8  6.9  3  4  7  0    0.2 000000  1025.4   4.7  0.0  1.6
    23 8 18  5  7 03  7.6  75  8.6  2.5  1.0  4.2  4.0  4.0  4.4  5.3  7.0  1  1  3  0    3.7 000000  1010.3   4.4  0.0  0.8
    24 8 22  2  7 02  6.5  95 10.5  4.0  2.0  4.0  4.2  4.6  4.9  5.5  7.0  1  2  3  0    3.9 0000G0  1013.1   4.9  0.0  0.8
    25 8 22  1  7 02  5.0  95  7.3  5.0  4.6  6.4  6.7  6.5  6.0  5.8  6.8  1  2  3  0    1.7 004000  1000.9   6.0  0.0  1.1
    26 6 22  3  7 02  6.0  83  6.0  4.3  2.1  4.2  4.6  5.3  5.8  6.2  6.9  1  1  0  0   10.5 005000  1005.5   5.8  0.0  0.2
    27 8 32  1  7 03  1.7  98  9.1  0.6 -3.2  1.2  2.2  4.0  5.0  5.8  6.9  3  4  5  0    4.5 000000  1013.9   5.0  0.0  0.6
    28 8 00  0  5 61  7.4  97  7.5  1.7  0.0  6.8  6.5  6.0  5.7  5.8  6.9  2  3  3  0    0.5 000000  1013.5   5.7  0.0  0.2
    29 9 22  1  6 02  6.1  98  8.5  5.1  2.4  5.6  5.6  5.9  5.8  6.1  7.0  1  2  3  0    3.3 000000  1027.6   5.8  0.0  0.0
    30 7 00  0  1 45  8.0 100  9.7  6.0  5.7  7.0  7.0  6.8  6.3  6.3  7.0  1  2  2  0    1.3 00000F  1035.2   6.3  0.0  0.0
    31 7 00  0  7 02  7.3  99  9.3  7.1  4.9  7.0  7.2  7.2  7.0  7.0  7.0  1  2  1  0    0.0 000000  1039.4   7.0  0.0  0.4
    ------------------------------------------------------------------------------------------------------------------------
    Mean
       6              5.5  91  8.3  3.4  1.0  4.3  4.7  5.2  5.6  6.1  7.3                            1006.6
    Total                                                                               193.4                172.2 10.7 24.6
    ------------------------------------------------------------------------------------------------------------------------
    (.)  Difference from 1989-98 average used by the Climatological Observers Link.           Rainfall was 208% of average
    Air temperatures                    Weather (No. days occurrence)                         and 202% of 1961-90 average.
      Mean maximum      8.3    (+0.4)        Sleet/snow falling          0      (-2.0)        Most in a day: 31.2 mm on 5th.
      Mean minimum      3.4    (+0.5)        Snow lying (at 09GMT)       0      (-0.5)        No. days with:
      Mean              5.9    (+0.5)        Hail  <5 mm                 5      [+3.2]        >=0.2 mm        25      (+ 6.8)
      No. days <0.0C      2    (-3.9)        Hail >=5 mm                 1    [all hail]      >=1.0 mm        22      (+ 7.5)
      Mean grass min    1.0    (+0.3)        Thunder heard               0      (-0.5)        >=5.0 mm        11      (+ 4.7)
      Lowest grass min -6.3    (+0.4)        Gales                       9                    Lysimeter:
      No. days <0.0C     10    (-3.8)        Fog (at 09GMT)              1                           PE       9.2 mm
                                                                                                     PWB    184.2 mm
      Highest maximum 11.6C on 5th. Lowest minimum -1.7 on 10th.                                     PWS    184.2 mm
      Minimum relative humidity:  62% on 16th                                                        PWD      0.0 mm
    * Wettest January since 1948 (231 mm) and second wettest on 70 year record.               Piche:         24.6 ml
    ------------------------------------------------------------------------------------------------------------------------
    Key: Observations at 09GMT...
      DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, degrees/10); 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, 21 recent rain,
      45 fog past hour, 61 continuous slight rain, 63 continuous moderate rain.
      Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
      SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
      'Recording Atmospheric Depositions on Grass' page.
    24 hour observations...
      Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
      Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
      Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
    Monthly observations...
      PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
    Weather: days with...
      s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 3 snow pellets,
      4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog at 09GMT.
    
    ------------------------------------------------------------------------------------------------------------------------
    

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    February 1999

                               CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR FEBRUARY 1999
    ------------------------------------------------------------------------------------------------------------------------
      -09GMT-->      -Air Temperature-       --Soil temp--  --Earth temp-- -State Grd.-       Weather         Rain  Fr. Pch
    DD N dd ff  V ww Temp  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E  C Gr SS   Rain SLHTGF   Press   hrs  hrs Evap
    ------------------------------------------------------------------------------------------------------------------------
    01 7 SW  1  5 01  6.9  96 10.1  6.6  6.0  6.9  7.0  7.2  7.2  7.2  7.2  1  1  1  0    0.0 000000  1041.9   0.0  0.0  0.8
    02 7 SW  3  7 03  6.3  89  8.6  4.2  0.6  4.6  5.2  6.0  6.7  7.1  7.3  1  1  1  0    0.0 000000  1040.8   0.0  0.0  0.6
    03 8 SW  4  5 02  8.5  97  9.5  6.2  5.4  7.5  7.3  7.0  7.0  7.0  7.3  1  0  1  0    0.0 000000  1035.9   0.0  0.0  0.7
    04 8 W   5  5 02  9.5  89 13.0  8.3  7.8  8.3  8.0  7.8  7.5  7.2  7.4  1  0  0  0    0.8 000000  1025.7   2.2  0.0  1.3
    05 7 NW  3  6 01  6.6  85  8.2  5.9  3.8  5.9  6.4  7.1  7.3  7.4  7.4  1  2  3  0    3.2 000000  1024.6   4.1  0.0  0.6
    06 8 NW  2  6 02  6.0  92  7.0  5.5  4.1  5.6  6.0  6.6  7.1  7.3  7.6  1  2  3  0    4.8 000000  1018.9   7.0  0.0  0.4
    07 5 N   1  7 87  2.0  85  5.7  0.5 -1.7  2.0  3.3  5.3  6.5  7.1  7.6  6  6  6  0    2.8 S05000  1013.9   5.0  0.0  0.6
    08 8 NW  1  4 71  1.2  96  4.0  1.0 -1.6  2.6  3.4  4.5  5.3  6.5  7.5  1  5  9  0    0.7 s05000  1004.2   3.5  0.0  0.6
    09 3 N   3  7 01  1.2  72  5.7 -0.3 -2.2  0.6  1.7  3.5  4.8  6.0  7.5  3  0  6  0     tr s03000  1008.3   0.0  2.8  1.8
    10 2 N   2  8 01  1.5  72  6.6 -0.5 -5.0  0.3  1.3  2.8  4.2  5.5  7.3  3  0  6  0    1.0 005000  1015.4   1.3  0.0  0.6
    11 7 N   1  8 02  2.3  95  8.6  0.8 -1.6  1.8  2.2  3.1  3.8  5.2  7.2  1  2  5  0    0.0 004000  1021.2   0.0  0.0  0.7
    12 8 SW  1  7 03  5.5  89  7.0  1.8 -2.1  3.3  3.3  3.6  4.1  5.1  7.0  1  0  1  0    2.2 000000  1023.1   3.8  0.0  0.3
    13 5 00  0  1 42  4.3 100 10.7  1.9 -1.5  4.0  4.0  4.7  4.8  5.3  6.9  1  2  2  0    0.8 00000F  1030.9   2.0  0.0  0.9
    14 8 SW  4  5 61  6.7  97  8.0  4.3  2.5  6.0  5.8  5.5  5.6  5.8  6.8  1  3  3  0    5.5 000000  1027.2   6.2  0.0  0.1
    15 7 SW  1  7 03  5.2  97  8.3  2.9  0.0  5.0  5.0  5.3  5.4  6.0  6.9  1  2  1  0    0.6 000000  1025.4   1.2  0.0  0.6
    16 1 NW  2  7 01  4.0  83  9.2  3.1 -0.2  4.0  5.0  5.8  5.8  6.2  6.9  1  2  1  0    1.6 000000  1018.9   0.6  0.0  0.9
    17 7 NW  1  7 01  4.7  93  8.5  3.6  1.7  4.5  4.8  5.4  5.8  6.1  6.9  1  2  4  0    2.0 004000  1018.9   4.0  0.0  0.4
    18 8 NW  2  7 02  7.8  97  9.8  4.7  4.3  6.2  6.2  6.3  6.2  6.3  6.9  1  2  3  0    5.9 000000  1018.5   5.5  0.0  0.3
    19 8 SW  2  4 20  9.5 100  9.7  7.8  7.7  8.5  8.0  7.4  7.0  6.7  7.0  1  2  3  0    0.7 000000  1011.1   0.6  0.0  0.5
    20 7 SW  1  7 05  4.9  90  7.8  2.7  0.0  4.3  4.9  6.2  6.5  7.0  7.2  1  0  1  0    5.2 004000  1016.2   5.1  0.0  1.1
    21 8 NW  5  5 80  6.9  94  8.7  4.9  4.1  6.0  6.1  6.3  6.7  6.8  7.2  2  3  3  0    5.9 004000  1002.2   3.3  0.0  0.7
    22 1 NW  5  6 01  2.7  89  8.5  1.2 -0.3  2.6  3.5  5.0  5.8  6.8  7.3  1  2  5  0    1.3 000000  1007.5   0.8  0.0  0.9
    23 6 NW  1  6 01  1.8  94  7.0  0.5 -2.9  2.2  2.8  4.3  5.2  6.3  7.3  1  2  5  0    7.1 000000  1018.1  10.5  0.0  0.6
    24 1 E   4  5 02  3.4  97  8.5  1.8  0.1  3.8  4.5  5.1  5.6  6.2  7.3  1  2  1  0    0.0 000000  1006.7   0.0  0.0  0.7
    25 7 SW  4  5 02  7.0  94  9.5  2.7 -0.5  5.8  5.7  5.6  5.8  6.2  7.3  1  0  1  0    0.7 0000G0  1016.2   0.7  0.0  0.4
    26 7 SW  4  4 01  7.7  97  9.6  6.0  4.5  6.6  6.5  6.6  6.6  6.6  7.3  1  2  3  0    0.1 0000G0  1007.5   0.0  0.0  1.0
    27 3 SW  4  7 03  4.7  76  8.1  3.3  1.1  3.3  4.3  5.9  6.3  6.6  7.3  1  0  1  0    0.0 000000  1003.8   0.0  0.0  2.0
    28 8 SW  7  6 02  8.1  81 10.2  4.2  2.5  6.0  5.5  5.5  6.0  6.5  7.3  1  0  0  0   10.9 0000G0  1008.3  10.9  0.0  0.8
    ------------------------------------------------------------------------------------------------------------------------
    Mean
       6              5.2  91  8.4  3.4  1.3  4.6  4.9  5.5  6.0  6.4  7.2                            1018.3
    Total                                                                                63.8                 78.3  2.8 20.9
    ------------------------------------------------------------------------------------------------------------------------
    (.)  Difference from 1989-98 average used by the Climatological Observers Link.           Rainfall was 65% of average
    Air temperatures                    Weather (No. days occurrence)                         and 95% of 1961-90 average.
      Mean maximum      8.4    (-0.1)        Sleet/snow falling          3      (-0.2)        Most in a day: 10.9 mm on 28th.
      Mean minimum      3.4    (+0.5)        Snow lying (at 09GMT)       0      (-1.2)        No. days with:
      Mean              5.9    (+0.2)        Hail  <5 mm                 5      [+5.1]        >=0.2 mm        20      (+ 1.5)
      No. days <0.0C      2    (-3.0)        Hail >=5 mm                 3    [all hail]      >=1.0 mm        14      (- 0.2)
      Mean grass min    1.3    (+0.3)        Thunder heard               0      (-0.7)        >=5.0 mm         6      (+ 0.8)
      Lowest grass min -5.0    (+0.2)        Gales                       3                    Lysimeter:
      No. days <0.0C     11    (-0.4)        Fog (at 09GMT)              1                           PE      27.3 mm
                                                                                                     PWB     36.5 mm
      Highest maximum 13.0C on 4th. Lowest minimum -0.5 on 10th.                                     PWS     37.0 mm
      Minimum relative humidity:  60% on  9th                                                        PWD     -0.5 mm
    *                                                                                         Piche:         20.9 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, 05 haze, 20 drizzle in past hr,
      42 fog thinning, 61 continuous slight rain, 71 slight snow, 80 slight rain shower, 87 shower of snow pellets.
      Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
      SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
      'Recording Atmospheric Depositions on Grass' page.
    24 hour observations...
      Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
      Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
      Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
    Monthly observations...
      PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
    Weather: days with...
      s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 3 snow pellets,
      4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog at 09GMT.
    

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    March 1999

                              CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR MARCH 1999
    ------------------------------------------------------------------------------------------------------------------------
      -09GMT-->      -Air Temperature-       --Soil temp--  --Earth temp-- -State Grd.-       Weather         Rain  Fr. Pch
    DD N dd ff  V ww Temp  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E  C Gr SS   Rain SLHTGF   Press   hrs  hrs Evap
    ------------------------------------------------------------------------------------------------------------------------
    01 8 W   4  5 02 10.2  96 10.7  6.9  5.8  8.5  7.8  7.0  6.7  6.5  7.3  1  2  3  0   20.6 000000  1002.2  11.0  0.0  0.1
    02 8 SW  3  2 46  9.5  99  9.5  8.5  7.8  8.7  8.4  8.0  7.5  7.2  7.2  2  3  3  0   22.1 0000GF   999.7  10.8  0.0  0.7
    03 7 SW  5  6 01  7.0  90  8.7  5.9  5.3  6.8  6.8  7.2  7.4  7.5  7.5  1  2  3  0    2.4 000000   973.2   4.0  0.0  0.6
    04 6 N   3  6 25  3.5  90  4.5  2.5  1.1  4.5  5.2  6.5  6.9  7.3  7.5  1  2  3  0    2.8 s04000   987.4   5.2  0.0  1.6
    05 6 N   4  8 02  3.7  70  6.5  2.3  0.5  2.6  3.2  4.8  5.8  6.8  7.7  1  0  0  0    2.7 005000   997.2   1.3  0.0  1.2
    06 6 N   1  8 02  3.2  84  7.4  0.6 -1.8  2.3  3.0  4.5  5.3  6.3  7.5  1  2  4  0    5.6 004000  1000.5  11.1  0.0  0.7
    07 8 N   3  5 61  3.5  95  4.8  2.4 -0.9  4.0  4.3  5.0  5.7  6.3  7.4  2  3  3  0    2.5 s04000  1002.6   4.5  0.0  0.5
    08 7 E   1  7 02  3.8  87  5.0  2.5  1.0  4.0  4.1  4.9  5.4  6.1  7.3  1  1  3  0    0.6 000000  1002.6   3.8  0.0  0.5
    09 7 NE  3  7 01  4.3  87  7.2  2.9  0.8  4.0  4.2  4.8  5.3  6.0  7.2  1  0  3  0    0.8 000000  1006.3   1.3  0.0  0.6
    10 5 NE  1  7 05  3.4  97  9.3  1.6 -1.2  3.0  3.7  4.8  5.1  6.1  7.1  1  3  4  0    0.0 000000  1014.2   0.0  0.0  0.9
    11 6 NE  1  7 03  3.2  83  7.7 -0.9 -5.4  1.2  2.2  4.0  4.9  6.1  7.1  3  0  5  0    0.8 000000  1011.5   0.9  7.6  0.7
    12 7 SW  1  6 01  7.7  94 11.7  3.2  0.4  6.5  6.0  5.6  5.7  5.8  7.0  1  2  3  0    0.0 000000  1005.5   0.0  0.0  1.2
    13 1 SW  3  7 01  7.0  78 11.0  4.9  3.2  5.0  5.5  5.4  6.5  6.5  7.0  1  0  1  0    0.0 000000  1009.5   0.0  0.0  1.8
    14 7 SW  4  6 03  7.7  94 12.0  5.8  4.7  6.3  6.0  6.3  6.6  6.7  7.2  1  0  1  0    0.0 000000  1020.8   0.0  0.0  1.3
    15 4 SW  3  7 05  8.3  87 12.5  6.6  5.4  6.5  6.5  7.0  7.2  7.1  7.2  1  0  1  0    0.2 000000  1026.1   1.0  0.0  2.0
    16 6 SW  3  7 01  8.7  97 15.5  7.2  6.3  8.2  7.7  7.5  7.5  7.3  7.3  1  2  3  0    0.0 000000  1028.3   0.0  0.0  1.2
    17 4 00  0  3 42  7.4  99 16.9  5.5  3.6  7.5  7.4  8.0  8.2  7.8  7.3  1  0  2  0    0.4 000000  1030.2   0.3  0.0  1.9
    18 2 NW  2  6 01  7.5  88 11.8  5.0  2.5  7.2  7.6  8.5  8.7  8.3  7.6  1  2  3  0    0.0 000000  1027.6   0.0  0.0  1.0
    19 6 NW  2  5 01  7.4  90 11.5  3.4  0.6  7.2  7.0  7.7  8.3  8.3  7.8  1  2  3  0    0.0 000000  1030.9   0.0  0.0  0.8
    20 7 W   1  7 02  7.5  81  9.6  4.5  1.6  7.7  7.5  8.0  8.3  8.3  7.9  1  0  1  0    8.3 000000  1029.4   2.4  0.0  1.1
    21 6 NW  5  6 01  7.0  88 10.5  6.1  4.8  7.3  7.5  8.0  8.3  8.3  8.0  1  0  1  0    0.4 000000  1003.4   1.1  0.0  1.1
    22 8 N   1  7 02  6.2  82  9.0  4.3  2.9  6.4  6.3  7.1  7.8  8.2  8.2  1  2  3  0    2.2 000000  1018.1   2.9  0.0  0.4
    23 8 SW  2  6 10  8.3  92 10.9  5.9  5.8  7.8  7.8  7.8  8.0  8.1  8.0  1  0  1  0    0.2 000000  1012.3   0.0  0.0  0.7
    24 8 SW  4  6 60  8.6  92  9.6  7.7  7.1  8.1  8.2  8.2  8.4  8.3  8.1  1  2  3  0    7.8 000000  1005.1   9.2  0.0  0.4
    25 8 00  0  4 60  5.7  98  7.6  5.3  4.9  7.0  7.3  8.0  8.2  8.4  8.1  1  3  3  0    0.6 000000  1000.1   1.1  0.0  0.6
    26 3 W   2  7 02  6.1  77 10.3  0.6 -2.3  4.5  5.0  6.8  7.7  8.2  8.2  1  1  4  0     tr 000000   998.9   0.0  0.0  1.0
    27 6 W   1  7 01  7.5  84 10.8  3.0 -0.7  6.7  6.2  6.9  7.8  8.0  8.2  1  0  4  0    0.0 000000  1004.2   0.0  0.0  0.8
    28 6 S   5  7 03  7.6  77 10.5  3.4 -0.3  5.7  5.7  6.8  7.6  8.0  8.2  1  0  1  0   11.2 0000G0  1009.5  10.6  0.0  1.8
    29 8 SW  5  5 61  9.5  97 12.7  7.6  7.0  9.2  8.8  8.3  8.2  8.2  8.2  1  3  3  0     tr 0000G0  1004.2   0.0  0.0  1.2
    30 5 SW  3  6 01  9.9  86 14.0  8.2  7.2  9.0  8.5  8.5  8.8  8.5  8.2  1  0  1  0    0.8 000000  1012.7   1.0  0.0  1.3
    31 7 SW  3  7 02 10.2  82 15.6  7.0  3.9  9.6  9.4  9.3  9.3  8.9  8.4  1  2  3  0     tr 000000  1011.5   0.0  0.0  3.1
    ------------------------------------------------------------------------------------------------------------------------
    Mean
       6              6.8  88 10.2  4.5  2.6  6.2  6.3  6.8  7.2  7.4  7.6                            1009.2
    Total                                                                                93.0                 83.5  7.6 32.8
    ------------------------------------------------------------------------------------------------------------------------
    (.)  Difference from 1989-98 average used by the Climatological Observers Link.           Rainfall was 106% of average
    Air temperatures                    Weather (No. days occurrence)                         and 119% of 1961-90 average.
      Mean maximum     10.2    (-0.2)        Sleet/snow falling          2      (+0.8)        Most in a day: 22.1 mm on 2nd.
      Mean minimum      4.5    (+0.3)        Snow lying (at 09GMT)       0      (-0.3)        No. of days with:
      Mean              7.4    (+0.1)        Hail  <5 mm                 3      [+3.5]        >=0.2 mm        20      (+ 2.4)
      No. days <0.0C      1    (-0.7)        Hail >=5 mm                 1    [all hail]      >=1.0 mm        11      (- 1.9)
      Mean grass min    2.6    (+0.3)        Thunder heard               0      (-0.5)        >=5.0 mm         6      (+ 0.1)
      Lowest grass min -5.4    (-1.4)        Gales                       2                    Lysimeter:
      No. days <0.0C      7    (-2.0)        Fog (at 09GMT)              1                           PE      60.3 mm
                                                                                                     PWB     32.7 mm
      Highest maximum  16.9 on 17th. Lowest minimum -0.9C on 11th.                                   PWS     42.8 mm
      Minimum relative humidity:  59% on 17th and 26th.                                              PWD    -10.1 mm
    *                                                                                         Piche:         32.8 ml
    ------------------------------------------------------------------------------------------------------------------------
    Key: Observations at 09GMT...
      DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
      V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
      ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 05 haze, 25 rain shower in past
      hour, 42 fog thinning, 46 fog thicker in past hour, 60 intermittent slight rain, 61 continuous slight rain.
      Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
      SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
      'Recording Atmospheric Depositions on Grass' page.
    24 hour observations...
      Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
      Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
      Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
    Monthly observations...
      PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
    Weather: days with...
      s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 3 snow pellets,
      4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog at 09GMT.
    
    ------------------------------------------------------------------------------------------------------------------------
    

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    April 1999

                              CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR APRIL 1999
    ------------------------------------------------------------------------------------------------------------------------
      -09GMT-->      -Air Temperature-       --Soil temp--  --Earth temp-- -State Grd.-       Weather         Rain  Fr. Pch
    DD N dd ff  V ww Temp  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E  C Gr SS   Rain SLHTGF   Press   hrs  hrs Evap
    ------------------------------------------------------------------------------------------------------------------------
    01 7 SE  2  6 05 14.5  63 19.6 10.2  7.7 10.5  9.9  9.7  9.8  9.3  8.5  0  0  1  0    1.5 000000  1009.5   0.8  0.0  2.8
    02 3 S   1  5 05 12.0  74 14.2  8.7  7.0 10.5 10.3 10.5 10.5 10.0  8.8  1  2  3  0    2.2 000000  1012.3   2.2  0.0  0.8
    03 6 00  0  8 01 10.2  85 17.5  4.9  2.5 10.0  9.3  9.6 10.0 10.0  8.9  1  2  1  0     tr 000000  1017.4   0.0  0.0  1.3
    04 8 SW  2  5 50 11.9  95 15.6  9.6  8.0 11.6 11.0 10.9 11.0 10.2  9.0  1  1  3  0    2.4 000000  1022.0   1.9  0.0  1.0
    05 8 S   5  5 10 10.6  99 12.1 10.0  9.8 11.2 11.0 11.0 11.1 10.5  9.1  1  2  3  0    4.1 000000  1020.4   3.5  0.0  0.5
    06 5 SW  6  6 10 10.9  86 12.5  9.3  8.4 10.8 10.8 10.6 10.9 10.8  9.5  1  0  3  0    1.9 000000  1014.6   2.0  0.0  0.6
    07 8 W   3  7 01  7.6  94 14.5  6.0  2.9  8.5  8.9  9.8 10.5 10.5  9.3  1  2  3  0    1.1 000000  1040.1   3.9  0.0  0.8
    08 9 SW  1  4 20 10.4  99 13.4  6.5  3.1 10.5 10.0 10.1 10.8 10.8  9.5  1  2  3  0     tr 000000  1025.4   0.0  0.0  0.7
    09 8 SW  3  5 10 10.3  94 14.5 10.3  9.4 11.3 11.1 10.9 11.0 10.9  9.5  1  0  3  0   10.0 000000  1023.9   3.0  0.0  1.0
    10 7 W   3  7 25  8.9  92 13.3  7.9  6.7 10.2 10.0 10.5 11.0 10.7  9.8  1  2  3  0    0.0 000000  1015.8   0.0  0.0  1.2
    11 6 W   3  7 03  8.5  84 11.3  4.2  1.1  8.2  7.8  9.2 10.5 10.9  9.9  1  0  1  0   14.6 0000G0  1020.8   7.1  0.0  1.2
    12 8 W   2  5 60  7.5  97 13.5  5.4  4.2  8.8  8.6  9.1 10.1 10.6 10.0  1  3  3  0    1.8 000000   992.5   3.1  0.0  0.8
    13 7 NW  6  7 79  5.4  75  9.0  3.4  0.2  7.0  7.3  8.8 10.0 10.3  9.8  1  2  6  0    6.6 s050G0  1004.2   4.5  0.0  1.3
    14 5 N   1  7 87  4.3  71  9.2 -0.5 -4.5  4.0  5.0  7.5  9.4 10.0 10.0  6  5  9  2    6.3 S13000   998.0   7.2  5.1  0.6
    15 7 N   2  5 87  4.5  98  8.7 -0.2 -1.7  5.0  5.1  6.7  8.6  9.3  9.8  3  3  4  0    1.2 s04000   999.0   2.0  1.1  0.8
    16 6 00  0  8 03  5.7  71 11.1 -0.1 -2.9  5.3  4.8  6.5  8.2  8.9  9.6  1  0  4  0    5.7 000000  1001.8   4.1  2.2  0.7
    17 6 NE  1  7 02  6.2  86 11.6  3.0  1.4  7.1  6.7  7.3  8.5  8.9  9.5  1  2  3  0    4.0 000000  1011.5   5.0  0.0  0.8
    18 7 W   2  7 03  5.9  89 10.6  3.0  0.4  8.0  7.3  8.0  8.9  9.0  9.3  1  2  3  0    0.0 000000  1014.2   0.0  0.0  1.1
    19 1 00  0  8 02  6.9  63 13.8  0.9 -2.5  5.3  5.5  7.5  8.9  9.3  9.5  1  0  4  0    3.1 000000  1016.6   5.5  0.0  2.1
    20 8 SE  2  7 60  8.1  86 12.5  5.2  4.5  8.0  8.2  9.0  9.8  9.8  9.2  1  3  3  0    8.6 000000   993.8   9.0  0.0  1.6
    21 8 S   6  5 61  9.1  89 10.5  7.9  7.0  9.5  9.0  9.0  9.6  9.6  9.4  2  3  3  0    1.9 0000G0   979.9   8.0  0.0  1.2
    22 7 SW  5  5 80  8.5  85 12.5  8.0  7.0  8.8  8.7  9.0  9.5  9.5  9.5  1  3  3  0    1.0 000000   994.7   1.2  0.0  1.6
    23 7 SW  1  7 25  9.0  86 14.0  6.5  5.1  9.5  8.7  9.0  9.8  9.8  9.5  1  2  3  0    0.4 000000  1004.6   0.4  0.0  1.5
    24 7 SW  1  5 01  9.5  89 14.2  7.6  5.7 11.1 10.5 10.1 10.5 10.1  9.5  1  1  3  0    0.9 000000  1013.5   2.8  0.0  1.4
    25 8 00  0  7 21  9.8  89 11.7  7.0  5.1 10.7 10.5 10.5 11.0 10.5  9.6  1  2  3  0    2.7 000000  1010.3   8.1  0.0  0.9
    26 9 NE  2  4 10  9.5  92 12.8  8.5  7.7 11.0 10.5 10.3 10.8 11.0  9.8  1  2  3  0    1.1 000000  1016.6   2.0  0.0  0.6
    27 5 E   4  4 05 11.4  88 17.1  8.2  7.4 12.2 10.8 10.5 11.0 10.8 10.0  1  0  1  0    0.0 000000  1029.4   0.0  0.0  1.4
    28 1 NE  1  7 05 14.1  65 18.2  7.3  4.8 12.3 12.5 11.0 11.8 11.5 10.1  1  0  1  0    0.0 000000  1032.0   0.0  0.0  1.8
    29 4 NE  2  7 05 13.5  75 17.7  7.8  5.4 13.0 11.3 11.9 12.5 12.1 10.2  0  0  1  0    0.0 000000  1023.9   0.0  0.0  1.2
    30 8 N   1  5 05  9.5  89 15.0  6.8  5.5 12.8 12.0 12.3 12.9 12.2 10.2  0  0  1  0    0.0 000000  1019.7   0.0  0.0  0.9
    ------------------------------------------------------------------------------------------------------------------------
    Mean
       6              9.1  85 13.4  6.1  4.2  9.4  9.1  9.6 10.3 10.3  9.5                            1012.6
    Total                                                                                83.1                 87.3  8.4 34.2
    ------------------------------------------------------------------------------------------------------------------------
    (.)  Difference from 1989-98 average used by the Climatological Observers Link.           Rainfall was 120% of average an
    Air temperatures                    Weather (No. days occurrence)                         138% of the 1961-90 average.
      Mean maximum     13.4    (+0.9)        Sleet/snow falling          3      (+1.2)        Most in a day: 14.6 mm (11th).
      Mean minimum      6.1    (+1.3)        Snow lying (at 09GMT)       1      (+0.7)        No. of days with:
      Mean              9.8    (+1.1)        Hail  <5 mm                 2      [+0.8]        >=0.2 mm        22      (+ 5.4)
      No. days <0.0C      3    (+2.1)        Hail >=5 mm                 1    [all hail]      >=1.0 mm        20      (+ 7.5)
      Mean grass min    4.2    (+1.2)        Thunder heard               0      (-0.3)        >=5.0 mm         6      (+ 1.6)
      Lowest grass min -4.5    (-1.6)        Gales                       3                    Lysimeter:
      No. days <0.0C      4    (-2.0)        Fog (at 09GMT)              0                           PE      56.2 mm
                                                                                                     PWB     26.9 mm
      Highest maximum 19.6C on 1st. Lowest minimum -0.5 on 14th.                                     PWS     38.3 mm
      Minimum relative humidity:  45% on 19th.   Wettest April since 1994.                           PWD    -11.4 mm
    * Highest mean minimum 6.1C and second highest mean 9.8C in 20 years records.             Piche:         34.2 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, 05 haze, 10 mist,
      20 drizzle in past hour, 21 rain in past hr, 25 rain shower in past hr, 50 slight intermittent drizzle, 60 int. slight
      rain, 61 continuous slight rain, 79 ice pellets, 80 slight rain shower, 87 shower of snow pellets.
      Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
      SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
      'Recording Atmospheric Depositions on Grass' page.
    24 hour observations...
      Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
      Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
      Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
    Monthly observations...
      PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
    Weather: days with...
      s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 3 snow pellets,
      4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog at 09GMT.
    
    ------------------------------------------------------------------------------------------------------------------------
    

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    May 1999

                              CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR MAY 1999
    ------------------------------------------------------------------------------------------------------------------------
      -09GMT-->      -Air Temperature-       --Soil temp--  --Earth temp-- -State Grd.-       Weather         Rain  Fr. Pch
    DD N dd ff  V ww Temp  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E  C Gr SS   Rain SLHTGF   Press   hrs  hrs Evap
    ------------------------------------------------------------------------------------------------------------------------
    01 5 N   2  7 01  9.6  83 13.5  5.0  3.3 12.6 11.5 12.0 12.8 12.3 10.5  0  0  1  0    0.0 000000  1020.8   0.0  0.0  1.1
    02 8 S   1  7 02 11.2  88 18.8  6.2  4.5 12.0 11.8 12.2 13.0 12.5 10.9  0  0  1  0    0.0 000000  1022.0   0.0  0.0  1.4
    03 1 SE  1  5 05 14.7  76 20.0  7.1  4.9 13.7 11.5 12.0 13.1 12.7 11.0  0  0  1  0    0.0 000000  1022.0   0.0  0.0  2.4
    04 3 NE  1  6 05 17.2  60 21.2 11.1  8.6 16.1 13.9 13.7 14.3 13.5 11.2  0  0  1  0    0.0 000000  1019.3   0.0  0.0  2.5
    05 7 E   4  7 05 11.7  77 15.8  9.0  7.4 14.5 13.4 13.8 14.3 13.8 11.3  0  0  0  0    0.5 000000  1012.3   1.5  0.0  1.5
    06 7 S   1  5 05 15.0  76 18.8 10.2  8.8 15.5 14.2 14.0 14.3 13.8 11.4  0  0  1  0    1.6 000000  1010.7   2.4  0.0  1.0
    07 8 S   1  6 61 12.2  87 17.0  7.2  4.7 11.6 11.7 12.5 13.5 13.5 11.6  1  3  3  0    8.1 000000  1008.7   7.7  0.0  0.8
    08 7 SW  5  6 80 13.0  85 15.0  8.7  7.1 14.0 12.4 12.5 13.5 13.2 11.8  1  2  3  0    7.7 000000  1005.5   8.6  0.0  1.3
    09 8 S   4  5 10 12.7  86 16.5 11.6 10.9 12.8 12.5 12.9 13.5 13.2 11.7  1  1  3  0    0.5 000000  1009.5   1.4  0.0  2.9
    10 8 SW  4  5 80 12.7  86 15.4 11.5  9.8 13.3 12.6 12.5 13.2 13.0 12.0  1  3  3  0    8.3 000000  1003.8   6.5  0.0  1.6
    11 8 S   5  5 62 11.4  93 15.0 10.0  9.5 12.2 12.2 12.6 13.3 13.0 11.8  1  3  3  0    3.8 000000  1004.6   2.5  0.0  1.4
    12 7 SW  5  7 01 11.6  93 15.0  9.8  8.5 13.0 12.5 12.6 13.3 13.2 11.9  1  2  3  0    3.3 000000  1005.5   2.6  0.0  1.4
    13 8 S   4  5 81 11.2  92 13.5  9.9  9.6 13.0 12.5 12.6 13.3 13.2 11.9  1  3  3  0   11.9 000000  1005.9   7.0  0.0  0.5
    14 9 NE  2  4 10 11.3  99 14.7  9.6  9.2 13.5 12.5 12.5 13.3 13.1 11.9  1  2  3  0    0.0 000000  1011.1   0.0  0.0  0.7
    15 2 NE  1  7 01 11.7  85 16.0  7.9  6.2 14.6 13.0 13.1 14.0 13.6 12.0  1  0  1  0    0.0 000000  1022.0   0.0  0.0  0.8
    16 5 N   1  7 01 11.6  81 15.2  6.6  4.6 14.5 13.1 13.4 14.4 14.0 12.1  0  0  1  0    0.0 000000  1024.2   0.0  0.0  1.2
    17 7 E   3  7 03  8.6  74 12.8  7.3  6.0 12.0 12.5 13.7 14.6 14.4 12.2  0  0  1  0    0.0 000000  1025.4   0.0  0.0  2.2
    18 7 E   5  6 05 10.5  80 18.3  7.7  6.9 11.8 11.8 12.8 13.8 14.0 12.3  0  0  0  0    0.2 000000  1018.9   0.0  0.0  2.0
    19 6 NE  2  5 05 12.4  80 17.6  9.8  9.3 14.3 13.3 13.2 13.8 13.7 12.4  0  0  3  0    0.0 000000  1014.2   0.0  0.0  1.2
    20 1 NE  1  7 02 14.3  73 18.6  8.3  6.5 14.5 13.2 13.8 14.5 14.0 12.3  0  0  1  0    2.4 000000  1016.2   2.8  0.0  1.8
    21 8 SW  6  4 42 11.7  99 15.0 10.8  9.7 13.0 13.5 14.5 15.0 14.5 13.2  1  2  3  0     tr 000000  1009.1   0.0  0.0  1.8
    22 5 W   5  7 01 11.5  70 14.6  7.0  5.4 11.6 10.8 12.2 13.8 14.5 13.5  0  0  1  0     tr 000000  1015.0   0.0  0.0  2.3
    23 8 SW  5  5 50 12.2  92 16.0 11.1 10.0 12.7 12.6 13.0 13.8 14.2 13.4  0  0  0  0    2.3 000000  1015.4   2.5  0.0  1.1
    24 8 SW  3  5 61 11.3  99 14.6 11.0 10.8 13.0 12.9 13.2 13.9 14.0 13.2  1  3  3  0    2.0 000000  1015.4   1.3  0.0  1.2
    25 7 SW  3  7 03 11.1  68 14.0  5.6  2.2 11.5 11.2 12.1 13.5 14.0 13.2  1  0  1  0    0.7 000000  1019.3   0.6  0.0  2.5
    26 8 S   4  5 42 12.3  99 16.5  9.9  8.8 13.0 12.5 12.8 13.5 13.8 13.2  1  2  3  0    0.0 000000  1015.4   0.0  0.0  1.5
    27 5 00  0  7 01 16.5  76 22.8  9.4  9.4 13.4 12.3 12.9 13.7 13.9 13.4  0  0  1  0    8.1 000000  1016.6   4.8  0.0  1.3
    28 8 S   5  4 20 13.3  99 13.5 13.3 13.3 15.0 15.2 15.4 15.5 14.6 13.2  1  3  3  0    2.9 000t00  1011.9   4.2  0.0  0.4
    29 8 NE  1  6 10  9.7  97 11.3  9.2  9.2 13.0 13.2 14.0 14.5 14.5 13.5  1  2  3  0    0.1 000000  1020.4   0.4  0.0  0.7
    30 8 E   3  7 20  9.2  96 12.3  9.0  9.0 11.4 12.0 13.0 14.3 14.3 13.5  1  0  3  0    0.0 000000  1020.4   0.0  0.0  0.5
    31 8 00  0  5 02 10.9  91 14.2  9.2  9.2 13.3 12.7 13.0 14.0 14.0 13.5  1  0  1  0    0.0 000000  1023.5   0.0  0.0  0.7
    ------------------------------------------------------------------------------------------------------------------------
    Mean
       7             12.1  85 15.9  9.0  7.8 13.2 12.6 13.0 13.8 13.7 12.3                            1015.0
    Total                                                                                64.4                 56.8  0.0 43.7
    ------------------------------------------------------------------------------------------------------------------------
    (.)  Difference from 1989-98 average used by the Climatological Observers Link.           Rainfall was 110% of average,
    Air temperatures                    Weather (No. days occurrence)                         101% of the 1961-90 average.
      Mean maximum     15.9    (-0.4)        Sleet/snow falling          0      (-0.3)        Most in a day: 11.9mm on 13th.
      Mean minimum      9.0    (+1.5)        Snow lying (at 09GMT)       0      (-0.1)        No. of days with:
      Mean             12.5    (+0.6)        Hail  <5 mm                 0      [-1.1]        >=0.2 mm        16      (+ 4.6)
      No. days <0.0C      0    ( 0.0)        Hail >=5 mm                 0    [all hail]      >=1.0 mm        12      (+ 3.5)
      Mean grass min    7.8    (+2.0)        Thunder heard               1      (+0.2)        >=5.0 mm         5      (+ 1.3)
      Lowest grass min  2.2    (+2.2)        Gales                       0                    Lysimeter:
      No. days <0.0C      0    (-0.9)        Fog (at 09GMT)              0                           PE     138.2 mm
                                                                                                     PWB    -73.8 mm
      Highest maximum 22.8C on 27th. Lowest minimum  5.0C on 1st.                                    PWS      7.8 mm
      Minimum relative humidity:  55% on  4th. * Mean minimum 9.0C and highest min 13.3C             PWD    -81.5 mm
    * warmest on record. Mean grass min 7.8C and lowest 2.2C also warmest on record.          Piche:         43.7 ml
    ------------------------------------------------------------------------------------------------------------------------
    Key: Observations at 09GMT...
      DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
      V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
      ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 05 haze, 10 mist,
      20 drizzle in past hour, 42 fog thinning, 50 slight drizzle, 61 continuous slight rain, 62 intermittent moderate rain,
      80 slight shower of rain, 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: 3 snow pellets,
      4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog at 09GMT.
    
    ------------------------------------------------------------------------------------------------------------------------
    

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    June 1999

                              CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JUNE 1999
    ------------------------------------------------------------------------------------------------------------------------
      -09GMT-->      -Air Temperature-       --Soil temp--  --Earth temp-- -State Grd.-       Weather         Rain  Fr. Pch
    DD N dd ff  V ww Temp  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E  C Gr SS   Rain SLHTGF   Press   hrs  hrs Evap
    ------------------------------------------------------------------------------------------------------------------------
    01 7 00  0  5 01 14.2  87 17.3 10.1  8.3 15.4 13.7 13.1 14.2 14.1 13.5  1  0  1  0   13.3 000000  1022.7   4.0  0.0  0.9
    02 8 NE  3  4 63 11.5  96 14.6 11.3  9.2 12.9 13.3 14.0 14.8 14.5 13.4  1  3  3  0   13.5 000000  1005.9  11.1  0.0  0.3
    03 7 SW  2  5 10 11.5  96 15.9 10.5  9.6 13.3 13.2 13.5 14.4 14.3 13.5  1  2  3  0    6.5 000000  1003.8   3.8  0.0  0.9
    04 7 SW  5  6 01 11.3  84 14.0 10.2  9.6 13.8 13.5 13.8 14.7 14.3 13.5  1  1  3  0    0.8 000000  1000.5   0.7  0.0  2.4
    05 5 N   1  7 01 11.6  73 15.4  6.3  3.5 11.8 11.3 12.5 14.3 14.5 13.5  1  1  4  0    0.5 004000  1000.1   0.9  0.0  1.6
    06 8 NW  1  6 61 10.7  95 13.2  6.1  3.5 13.0 12.7 13.2 14.8 14.5 13.5  1  3  3  0    2.6 000000  1003.8   1.0  0.0  0.7
    07 5 N   3  7 01 10.5  80 13.0  8.4  6.5 13.3 12.4 12.9 14.5 14.4 13.7  1  0  1  0    0.0 000000  1010.3   0.0  0.0  1.2
    08 6 NW  2  8 01 11.8  73 16.0  4.7  1.6 12.3 11.5 12.8 14.7 14.7 13.7  0  0  1  0    0.0 000000  1019.3   0.0  0.0  1.8
    09 6 N   2  8 01 11.2  73 14.5  5.5  2.5 11.8 11.7 13.0 14.9 14.8 13.8  0  0  1  0     tr 000000  1025.7   0.0  0.0  1.2
    10 7 N   2  7 01 12.1  81 15.0  9.8  8.1 14.4 13.5 13.5 15.0 14.8 13.8  0  0  1  0    0.0 000000  1028.3   0.0  0.0  1.0
    11 7 NW  1  6 02 11.2  85 14.7  7.5  3.9 13.3 13.0 13.5 15.0 14.8 13.9  0  0  1  0    2.0 000000  1028.7   2.8  0.0  0.7
    12 8 NW  1  5 21 11.1  96 15.5  9.6  9.1 13.6 13.2 13.5 14.9 14.8 13.9  1  2  3  0    0.0 000000  1023.9   0.0  0.0  1.0
    13 7 SW  2  7 01 13.0  75 14.7  9.3  6.7 15.3 14.3 14.5 15.5 15.0 13.9  0  0  1  0    0.5 000000  1025.0   1.5  0.0  1.5
    14 5 SW  4  7 80 14.1  88 18.2 12.0 11.4 15.2 14.5 14.5 15.4 15.1 13.9  0  0  3  0    0.0 000000  1025.4   0.0  0.0  1.9
    15 7 S   3  7 01 15.5  89 19.0 12.0 10.4 16.8 15.7 15.2 16.0 15.4 14.1  0  0  1  0    0.0 000000  1028.0   0.0  0.0  2.0
    16 2 S   3  8 02 17.1  63 19.5 13.1 12.5 16.7 15.6 16.0 16.3 15.7 14.3  0  0  0  0    0.8 000000  1025.4   2.1  0.0  2.6
    17 7 N   2  7 01 13.0  83 15.6 11.5 10.8 17.2 16.2 16.2 16.8 15.9 14.3  1  0  3  0    0.0 000000  1025.7   0.0  0.0  1.8
    18 1 S   3  8 02 15.6  73 19.5  7.7  5.3 13.0 14.0 15.5 16.8 16.3 14.6  0  0  1  0     tr 000000  1027.6   0.0  0.0  1.6
    19 8 SW  4  5 20 15.5  89 18.7 13.6 13.4 17.3 17.2 17.4 17.3 16.5 14.8  0  0  3  0   21.1 000000  1022.3   9.8  0.0  1.3
    20 7 NW  3  7 02 12.8  76 16.5  8.5  6.5 16.0 15.0 15.8 16.7 16.3 15.0  1  0  3  0    2.0 000000  1015.4   0.0  0.0  1.5
    21 7 N   3  6 03 11.0  81 16.0  7.0  4.4 15.0 14.6 15.5 16.5 16.3 15.0  1  0  3  0    0.1 000000  1022.3   0.3  0.0  1.4
    22 7 NW  3  7 02 13.5  72 16.0  7.8  4.9 16.4 15.0 15.6 16.6 16.3 15.1  1  0  1  0    9.8 000000  1023.9   8.2  0.0  1.2
    23 7 S   1  7 01 14.1  88 17.7 10.5 10.0 16.5 15.3 15.5 16.3 16.1 15.0  1  1  3  0    0.2 000000  1022.0   0.8  0.0  0.9
    24 6 00  0  6 03 16.6  84 19.7 10.3  7.3 17.7 15.5 15.5 16.4 16.0 15.0  1  0  1  0    0.0 000000  1027.2   0.0  0.0  1.5
    25 5 S   2  7 05 19.2  67 23.0 12.8  9.5 18.7 17.0 16.8 17.2 16.3 15.0  1  0  1  0    0.0 000000  1023.5   0.0  0.0  2.8
    26 3 S   2  7 05 19.5  54 24.5 12.2  9.2 20.3 17.5 17.3 17.9 16.9 15.0  1  0  1  0   17.8 000t00  1008.3  12.4  0.0  1.7
    27 8 W   1  5 51 11.6  99 16.5 11.1 11.6 16.0 16.6 17.5 17.8 17.1 15.2  1  3  3  0    1.5 000000   999.3   3.5  0.0  1.2
    28 7 SW  3  7 80 11.6  85 16.1  9.0  7.9 14.8 15.0 16.0 17.1 17.0 15.5  1  0  3  0     tr 000000  1004.2   0.0  0.0  2.0
    29 5 SW  2  7 03 14.5  78 18.7  8.5  5.2 16.5 14.8 15.5 16.8 16.8 15.4  1  0  1  0    0.0 000000  1010.3   0.0  0.0  2.0
    30 6 SW  3  7 01 14.2  77 17.1 11.0  9.5 16.6 15.8 16.4 17.0 16.8 15.4  0  0  1  0    8.3 000000  1018.5   7.3  0.0  2.0
    ------------------------------------------------------------------------------------------------------------------------
    Mean
       6             13.4  81 16.9  9.6  7.7 15.2 14.4 14.9 15.9 15.5 14.3                            1017.6
    Total                                                                               101.3                 70.2  0.0 44.6
    ------------------------------------------------------------------------------------------------------------------------
    (.)  Difference from 1989-98 average used by the Climatological Observers Link.           Rainfall was 135% of average:
    Air temperatures                    Weather (No. days occurrence)                         149% of 1961-90 average.
      Mean maximum     16.9    (-0.7)        Sleet/snow falling          0      ( 0.0)        Most in a day: 21.1 mm on 19th.
      Mean minimum      9.6    ( 0.0)        Snow lying (at 09GMT)       0      ( 0.0)        No. of days with:
      Mean             13.2    (-0.4)        Hail  <5 mm                 1      [+0.8]        >=0.2 mm        16      (+ 0.8)
      No. days <0.0C      0    ( 0.0)        Hail >=5 mm                 0    [all hail]      >=1.0 mm        11      (+ 0.4)
      Mean grass min    7.7    (-0.4)        Thunder heard               1      (+0.1)        >=5.0 mm         7      (+ 1.6)
      Lowest grass min  1.6    (-1.4)        Gales                       0                    Lysimeter:
      No. days <0.0C      0    ( 0.0)        Fog (at 09GMT)              0                           PE     130.6 mm
                                                                                                     PWB    -29.3 mm
      Highest maximum 24.5C on 26th. Lowest minimum  4.7 on 8th.                                     PWS     48.3 mm
      Minimum relative humidity:  48% on  8th.                                                       PWD    -77.6 mm
    * Third consecutive wet June >100mm. Third wettest first 6 months of year 599.0 mm.       Piche:         44.6 ml
    ------------------------------------------------------------------------------------------------------------------------
    Key: Observations at 09GMT...
      DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
      V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
      ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 05 haze, 10 mist, 20 drizzle
      in past hour, 21 rain in past hr, 51 continuous slight drizzle,  61 cont. sl. rain, 63 cont. moderate rain,
      80 slight rain shower.
      Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
      SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
      'Recording Atmospheric Depositions on Grass' page.
    24 hour observations...
      Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
      Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
      Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
    Monthly observations...
      PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
    Weather: days with...
      s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 3 snow pellets,
      4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog at 09GMT.
    
    ------------------------------------------------------------------------------------------------------------------------
    

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    July 1999

                              CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR JULY 1999
    ------------------------------------------------------------------------------------------------------------------------
      -09GMT-->      -Air Temperature-       --Soil temp--  --Earth temp-- -State Grd.-       Weather         Rain  Fr. Pch
    DD N dd ff  V ww Temp  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E  C Gr SS   Rain SLHTGF   Press   hrs  hrs Evap
    ------------------------------------------------------------------------------------------------------------------------
    01 8 SW  2  4 20 14.0  98 17.7 11.3 10.5 16.0 16.0 16.2 16.9 16.7 15.5  1  2  3  0    2.4 000000  1013.1   5.5  0.0  0.4
    02 8 S   4  5 20 15.7  98 23.4 13.7 13.7 16.7 16.5 16.7 17.1 16.8 15.4  1  1  3  0    0.7 000t00  1014.2   0.2  0.0  1.2
    03 8 SW  4  7 03 15.5  89 18.5 13.5 13.2 17.8 17.5 17.5 17.8 17.0 15.5  1  1  3  0     tr 000000  1007.1   0.0  0.0  1.6
    04 6 SW  3  5 10 16.4  82 21.0 13.7 11.8 17.9 16.8 17.0 17.5 16.9 15.6  1  0  1  0    0.0 000000  1007.5   0.0  0.0  1.6
    05 7 S   1  7 03 18.5  79 20.5 13.0  9.9 19.5 18.0 17.5 17.8 17.1 15.8  1  0  1  0    8.0 000000  1010.3   2.0  0.0  0.9
    06 5 S   3  7 02 17.5  84 22.1 11.9  8.6 19.0 17.0 17.1 17.9 17.2 15.9  1  0  1  0    0.0 000000  1016.2   0.0  0.0  1.2
    07 7 SW  1  8 01 17.3  80 20.3 14.1 12.8 19.0 18.0 18.1 18.4 17.5 16.0  1  0  1  0    0.0 000000  1024.2   0.0  0.0  2.0
    08 1 S   1  7 01 20.3  79 24.3 14.5 12.6 20.3 18.0 18.0 18.5 17.5 16.0  0  0  1  0    0.0 000000  1033.1   0.0  0.0  1.8
    09 1 00  0  6 05 22.7  77 27.0 14.2 12.8 21.8 19.2 19.0 19.3 18.2 16.2  0  0  1  0    0.0 000000  1032.0   0.0  0.0  1.4
    10 7 NE  1  5 05 21.0  85 23.2 17.5 16.9 22.2 21.0 21.5 20.1 18.8 16.5  0  0  1  0    0.0 000000  1029.4   0.0  0.0  1.1
    11 0 NE  3  7 02 18.3  73 21.5 14.5 14.1 21.5 20.0 20.0 20.2 19.0 16.9  0  0  1  0    0.0 000000  1029.1   0.0  0.0  2.3
    12 0 NE  2  7 04 18.4  75 22.4 14.2 11.6 20.7 19.3 20.0 20.2 19.3 17.0  0  0  1  0    0.0 000000  1025.0   0.0  0.0  2.1
    13 8 SW  2  7 03 15.5  74 16.4 10.5  8.1 19.1 19.0 19.8 20.0 19.3 17.2  0  0  1  0    1.1 000000  1013.5   1.0  0.0  1.3
    14 8 SW  3  7 50 13.2  80 17.5 11.5  8.8 17.0 17.2 18.0 19.0 18.9 17.3  0  0  3  0    0.7 000000  1011.5   0.4  0.0  2.1
    15 7 W   4  7 01 14.4  74 17.4 10.1  6.9 17.2 16.8 17.5 18.4 18.4 17.2  0  0  1  0    0.2 000000  1014.6   0.2  0.0  2.2
    16 7 SW  5  6 01 15.7  84 19.4 13.6 12.7 17.1 17.2 17.7 18.1 18.2 17.1  0  0  3  0     tr 000000  1017.4   0.0  0.0  2.6
    17 7 SW  6  7 50 15.8  76 18.7 13.1 12.3 17.1 17.1 17.6 17.9 18.0 17.0  0  0  0  0    2.4 000000  1017.4   4.5  0.0  1.4
    18 8 SW  2  5 50 15.4  98 18.2 14.9 14.6 16.8 17.0 17.5 17.7 17.7 16.9  1  3  3  0    0.1 000000  1015.4   0.0  0.0  1.4
    19 8 SW  4  7 02 17.7  88 18.8 15.0 13.8 18.0 17.0 17.1 17.7 17.7 16.8  0  0  3  0    9.5 000000  1009.1   4.7  0.0  0.8
    20 6 SW  4  7 01 15.9  90 18.4 14.5 14.5 17.5 17.0 17.2 17.7 17.5 16.6  1  2  3  0     tr 000000  1004.2   0.0  0.0  2.2
    21 8 W   5  7 80 12.8  85 16.5 11.4 10.1 15.4 15.6 16.5 17.3 17.3 16.4  1  0  3  0    1.0 000000  1012.7   1.8  0.0  2.1
    22 8 N   3  7 02 11.7  87 16.6 10.7 10.5 15.0 15.4 16.2 17.1 17.2 16.5  1  1  3  0    0.0 000000  1024.2   0.0  0.0  1.5
    23 7 SW  3  8 01 15.7  77 19.1  8.6  5.9 15.5 14.8 15.8 16.9 17.1 16.3  1  0  1  0    0.0 000000  1027.6   0.0  0.0  2.0
    24 2 S   4  6 05 19.1  83 22.3 14.0 11.5 18.8 17.6 17.6 17.0 17.3 16.3  0  0  1  0    0.0 000000  1025.4   0.0  0.0  1.6
    25 7 NE  1  6 05 13.8  78 17.2 11.6 11.6 18.0 17.6 18.0 18.0 17.5 16.3  0  0  1  0    0.0 000000  1026.1   0.0  0.0  1.9
    26 0 NE  3  8 01 16.8  68 20.0 11.5  8.8 18.0 16.8 17.5 18.2 17.5 16.5  0  0  1  0    0.0 000000  1028.3   0.0  0.0  2.7
    27 1 E   2  7 02 15.1  72 20.7 10.3  7.2 17.3 16.5 17.7 18.1 17.8 16.5  0  0  1  0    0.0 000000  1028.3   0.0  0.0  2.3
    28 5 NE  1  7 02 16.1  70 23.3  8.8  6.8 18.2 17.3 18.0 18.3 17.8 16.5  0  0  1  0    0.0 000000  1026.5   0.0  0.0  2.6
    29 5 S   1  7 05 18.8  68 24.3 10.8  7.6 18.5 17.6 18.5 18.6 18.0 16.7  0  0  1  0    0.0 000000  1024.2   0.0  0.0  2.1
    30 0 00  0  7 05 22.5  63 26.5 13.3 11.4 20.4 19.0 19.2 19.0 18.5 16.9  0  0  1  0    0.0 000000  1019.7   0.0  0.0  2.6
    31 5 NE  1  7 05 21.7  79 27.5 14.6 12.3 20.6 17.6 20.0 19.8 18.8 17.0  0  0  1  0    0.0 000000  1017.4   0.0  0.0  1.9
    ------------------------------------------------------------------------------------------------------------------------
    Mean
       5             16.9  80 20.7 12.7 11.1 18.3 17.5 17.9 18.3 17.8 16.5                            1019.5
    Total                                                                                26.1                 20.3  0.0 54.9
    ------------------------------------------------------------------------------------------------------------------------
    (.)  Difference from 1989-98 average used by the Climatological Observers Link.           Rainfall was 47% of average;
    Air temperatures                    Weather (No. days occurrence)                         36% of 1961-90 average.
      Mean maximum     20.7    (+0.8)        Sleet/snow falling          0      ( 0.0)        Most in a day: 9.5 mm on 19th.
      Mean minimum     12.7    (+0.7)        Snow lying (at 09GMT)       0      ( 0.0)        No. of days with:
      Mean             16.7    (+0.8)        Hail  <5 mm                 0      [-0.1]        >=0.2 mm         9      (- 5.1)
      No. days <0.0C      0    ( 0.0)        Hail >=5 mm                 0    [all hail]      >=1.0 mm         6      (- 3.6)
      Mean grass min   11.1    (+5.6)        Thunder heard               1      (+0.4)        >=5.0 mm         2      (- 1.8)
      Lowest grass min  5.9    (+0.4)        Gales                       0                    Lysimeter:
      No. days <0.0C      0    ( 0.0)        Fog (at 09GMT)              0                           PE     112.9 mm
                                                                                                     PWB    -86.8 mm
      Highest maximum 27.5C on 31st. Lowest minimum  8.6 on 23rd.                                    PWS      3.0 mm
      Minimum relative humidity:  50% on 30th                                                        PWD    -89.8 mm
    * Grass min 16.9C on 10th highest in records any month. Mean soil 30cm of 18.3C           Piche:         54.9 ml
      second highest to 1995 (18.5C). Driest since 1984 (19.2 mm) and sixth driest July in records since 1928.
    ------------------------------------------------------------------------------------------------------------------------
    Key: Observations at 09GMT...
      DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
      V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
      ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
      10 mist, 20 rain in past hour, 50 slight drizzle, slight rain shower.
      Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
      SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
      'Recording Atmospheric Depositions on Grass' page.
    24 hour observations...
      Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
      Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
      Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
    Monthly observations...
      PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
    Weather: days with...
      s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 3 snow pellets,
      4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog at 09GMT.
    
    ------------------------------------------------------------------------------------------------------------------------
    

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    August 1999

                              CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR  AUGUST 1999
    ------------------------------------------------------------------------------------------------------------------------
      -09GMT-->      -Air Temperature-       --Soil temp--  --Earth temp-- -State Grd.-       Weather         Rain  Fr. Pch
    DD N dd ff  V ww Temp  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E  C Gr SS   Rain SLHTGF   Press   hrs  hrs Evap
    ------------------------------------------------------------------------------------------------------------------------
    01 8 NE  1  4 10 16.5  92 21.6 13.0 11.2 20.0 19.6 19.9 19.8 19.0 17.1  0  0  1  0    0.0 000000  1017.4   0.0  0.0  1.1
    02 7 S   1  6 02 20.5  75 23.1 14.6 14.0 21.0 20.0 20.0 19.8 19.1 17.2  0  0  1  0    8.4 000t00  1015.4   8.6  0.0  1.0
    03 8 00  0  4 10 16.9  99 18.5 16.0 15.8 19.0 19.1 19.5 19.7 19.0 17.5  1  3  3  0    6.0 000000  1012.3   5.9  0.0  0.5
    04 7 SE  1  7 03 18.5  92 25.1 13.1 11.6 19.1 18.0 18.3 19.1 18.8 17.2  1  0  2  0   13.5 000t00  1012.3   8.1  0.0  1.1
    05 8 00  0  5 61 15.7  99 21.2 15.3 15.0 17.6 18.5 19.1 19.5 18.9 17.5  1  3  3  0    6.2 000000  1009.5   1.2  0.0  1.4
    06 7 SE  1  8 02 19.3  79 23.3 13.1 10.6 19.0 18.0 18.7 19.1 18.8 17.5  1  0  1  0   16.4 000000  1011.9  11.8  0.0  0.5
    07 8 E   2  5 10 15.7  98 19.0 15.1 14.9 18.0 18.2 19.0 19.3 18.9 17.5  1  2  3  0    2.4 000000  1007.5   1.7  0.0  1.1
    08 8 E   4  7 61 13.5  98 16.0 13.3 12.8 16.2 17.0 18.0 18.5 18.6 17.5  1  3  3  0     tr 000000  1004.2   0.0  0.0  1.0
    09 8 NE  3  6 02 15.0  91 15.4 13.3 12.8 16.6 16.8 17.3 18.2 18.3 17.5  1  0  1  0    3.0 000000  1004.6   8.0  0.0  0.4
    10 7 NE  1  7 03 13.7  87 17.0 11.3 11.3 16.5 16.0 16.6 17.5 17.8 17.2  1  2  3  0    0.0 000000  1015.8   0.0  0.0  1.3
    11 5 S   2  7 03 16.2  76 18.0  9.2  6.2 15.2 15.2 16.5 17.6 17.8 17.2  1  0  1  0     tr 000000  1021.2   0.0  0.0  1.0
    12 6 SE  1  6 02 17.0  84 18.7 11.0  7.9 17.1 16.3 16.9 17.7 17.8 17.2  1  0  1  0    3.9 000000  1022.0   4.0  0.0  1.0
    13 8 SW  5  6 02 16.2  96 17.5 14.2 11.6 17.0 16.8 17.1 17.6 17.6 16.9  1  2  3  0    4.7 000000  1012.7   4.5  0.0  0.6
    14 7 SW  4  7 01 14.5  85 17.5 11.0  8.5 16.2 16.0 16.7 17.3 17.5 16.9  1  1  3  0    0.4 000000  1003.4   1.2  0.0  1.2
    15 4 NW  2  7 02 14.4  78 18.2 10.8  8.8 15.1 15.0 16.1 17.2 17.5 16.9  1  0  1  0    0.0 000000  1008.3   0.0  0.0  1.8
    16 6 W   3  7 03 13.7  79 17.5  8.0  4.7 15.1 14.8 15.8 16.8 17.2 16.8  1  0  1  0    2.1 000000  1008.7   2.3  0.0  1.6
    17 8 SW  1  7 61 12.2  96 19.0 10.7  8.3 14.6 15.0 15.9 16.8 17.1 16.5  1  3  3  0    0.4 000000  1000.5   1.1  0.0  2.0
    18 6 NE  2  7 03 14.4  90 18.0  9.8  6.6 14.9 14.8 15.8 16.7 17.0 16.7  1  0  1  0    2.8 000000   995.9   2.7  0.0  1.1
    19 5 N   3  7 03 13.7  81 17.2  8.1  4.7 14.5 14.8 16.0 17.0 17.0 16.4  1  0  1  0    0.0 000000  1011.5   0.0  0.0  1.3
    20 7 NE  2  7 03 14.5  83 18.6  9.0  6.7 15.8 15.2 16.0 16.8 17.0 16.5  1  0  1  0    0.0 000000  1023.5   0.0  0.0  1.9
    21 1 NE  1  7 05 14.4  74 17.5  7.6  5.1 14.8 14.5 16.0 16.9 17.0 16.5  0  0  1  0    0.0 000000  1027.6   0.0  0.0  1.9
    22 1 SE  2  7 05 15.1  71 21.7  9.2  6.0 15.0 15.0 16.2 17.0 17.1 16.5  0  0  1  0    0.0 000000  1025.0   0.0  0.0  2.2
    23 8 NE  1  7 03 14.8  80 17.3 12.3 10.3 17.0 17.0 17.4 17.5 17.3 16.4  0  0  1  0    1.0 000000  1020.4   2.5  0.0  1.5
    24 8 E   3  6 02 16.4  78 19.8 13.5 11.7 16.6 16.3 16.9 17.2 17.2 16.5  1  0  3  0    2.6 000000  1018.9   6.1  0.0  1.2
    25 8 00  0  5 61 16.5  98 20.2 14.5 13.9 17.0 16.9 17.1 17.3 17.2 16.5  1  3  3  0    6.0 000000  1012.3   2.8  0.0  0.8
    26 7 SW  3  5 10 15.5  95 17.5 14.3 13.0 16.5 16.6 17.0 17.4 17.2 16.4  1  0  3  0     tr 000000  1009.1   0.0  0.0  1.0
    27 6 SW  3  5 10 15.0  85 20.1 10.9  7.3 15.3 15.3 16.2 17.1 17.3 16.3  1  0  1  0    0.0 000000  1019.3   0.0  0.0  1.8
    28 1 W   1  7 01 16.0  71 19.0 13.4 11.0 17.5 17.0 17.2 17.7 17.3 16.4  0  0  1  0    0.0 000000  1025.7   0.0  0.0  1.4
    29 8 SW  4  7 03 16.4  83 18.3 11.2  8.6 16.1 15.8 15.7 17.3 17.4 16.5  0  0  1  0    4.2 000000  1021.6   2.5  0.0  0.6
    30 7 W   3  7 01 13.7  89 15.6  9.8  7.5 14.8 14.6 15.6 16.7 17.1 16.5  1  0  1  0    0.0 000000  1022.0   0.0  0.0  1.0
    31 8 W   2  5 02 15.6  87 17.8 12.1 10.0 16.0 15.5 16.0 16.5 16.8 16.3  1  0  1  0    0.0 000000  1022.0   0.0  0.0  1.1
    ------------------------------------------------------------------------------------------------------------------------
    Mean
       6             15.5  86 18.9 11.9  9.9 16.6 16.4 17.1 17.8 17.7 16.9                            1014.3
    Total                                                                                84.0                 75.0  0.0 37.4
    ------------------------------------------------------------------------------------------------------------------------
    (.)  Difference from 1989-98 average used by the Climatological Observers Link.           Rainfall was 118% of average
    Air temperatures                    Weather (No. days occurrence)                         but 94% of 1961-90 average.
      Mean maximum     18.9    (-0.3)        Sleet/snow falling          0      ( 0.0)        Most in a day: 16.4 mm on 6th.
      Mean minimum     11.9    (+0.3)        Snow lying (at 09GMT)       0      ( 0.0)        No. of days with:
      Mean             15.4    ( 0.0)        Hail  <5 mm                 0      [ 0.0]        >=0.2 mm        17      (+ 2.8)
      No. days <0.0C      0    ( 0.0)        Hail >=5 mm                 0    [all hail]      >=1.0 mm        15      (+ 4.7)
      Mean grass min    9.9    (-0.5)        Thunder heard               2      (+1.3)        >=5.0 mm         6      (+ 1.0)
      Lowest grass min  4.7    (-1.0)        Gales                       0                    Lysimeter:
      No. days <0.0C      0    ( 0.0)        Fog (at 09GMT)              0                           PE      66.1 mm
                                                                                                     PWB     17.9 mm
      Highest maximum 25.1C on 4th. Lowest minimum  7.6 on 21st.                                     PWS     39.1 mm
      Minimum relative humidity:  50% on  22nd.                                                      PWD    -21.1 mm
    * Wettest August since 1992 (149 mm).                                                     Piche:         37.4 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,
      61 continuous slight rain.
      Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
      SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
      'Recording Atmospheric Depositions on Grass' page.
    24 hour observations...
      Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
      Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
      Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
    Monthly observations...
      PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
    Weather: days with...
      s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 3 snow pellets,
      4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog at 09GMT.
    
    ------------------------------------------------------------------------------------------------------------------------
    

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    September 1999

                              CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR SEPTEMBER 1999
    ------------------------------------------------------------------------------------------------------------------------
      -09GMT-->      -Air Temperature-       --Soil temp--  --Earth temp-- -State Grd.-       Weather         Rain  Fr. Pch
    DD N dd ff  V ww Temp  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E  C Gr SS   Rain SLHTGF   Press   hrs  hrs Evap
    ------------------------------------------------------------------------------------------------------------------------
    01 8 SW  3  7 02 17.2  84 20.8 12.6 10.0 16.2 15.7 16.0 16.7 16.7 16.2  1  0  1  0    0.0 000000  1023.1   0.0  0.0  1.6
    02 5 SW  3  7 01 19.3  83 21.4 15.4 14.2 18.0 17.0 17.0 17.2 16.8 16.2  0  0  1  0    0.0 000000  1023.9   0.0  0.0  1.3
    03 6 SW  3  7 01 17.3  94 22.5 13.7 11.0 16.8 16.6 17.2 17.4 17.2 16.3  0  0  1  0    0.0 000000  1022.0   0.0  0.0  1.2
    04 0 00  0  7 05 18.7  81 22.4 13.1 10.5 17.2 16.6 17.4 17.7 17.3 16.4  0  0  1  0    0.0 000000  1023.5   0.0  0.0  1.8
    05 6 00  0  5 10 19.6  85 26.3 14.0 11.7 19.1 17.8 18.1 18.2 17.6 16.5  0  0  1  0    0.0 000000  1018.5   0.0  0.0  2.0
    06 6 S   3  5 10 18.2  83 19.6 13.2 10.2 18.5 17.8 18.2 18.4 17.9 16.8  0  0  1  0   33.8 000000  1012.3   8.8  0.0  1.4
    07 7 W   3  6 10 14.0  95 18.9 12.1 11.8 16.6 16.9 17.5 17.8 17.8 16.8  1  2  3  0    0.0 000000  1009.5   0.0  0.0  2.7
    08 7 S   7  6 10 16.1  75 19.7 12.5  9.9 15.0 15.6 16.7 17.7 17.7 16.9  1  0  0  0   12.6 0000G0  1011.5   2.6  0.0  1.6
    09 1 W   2  7 01 13.5  72 17.7  8.5  4.6 13.1 13.5 15.4 16.8 17.4 16.8  1  0  1  0    0.0 000000  1025.0   0.0  0.0  2.9
    10 6 S   2  7 03 16.5  60 22.0  9.3  5.5 14.0 13.5 15.0 16.5 17.0 16.8  1  0  1  0    0.1 000000  1026.5   0.0  0.0  3.4
    11 7 SW  5  5 10 18.7  84 18.9 15.6 12.2 17.3 17.0 17.0 17.2 17.2 16.5  1  0  0  0    2.6 000000  1014.2   3.9  0.0  0.8
    12 5 S   2  8 02 11.9  78 17.1  8.4  4.2 13.7 13.8 15.2 16.4 16.9 16.5  1  0  1  0    3.7 000000  1016.2   2.0  0.0  2.1
    13 6 SW  4  8 01 11.6  82 16.3 10.1  5.5 12.8 13.8 15.1 16.2 16.5 16.4  1  1  3  0    0.6 000000  1011.1   1.2  0.0  1.8
    14 1 S   1  7 01 12.5  88 18.5  8.5  6.0 13.1 13.5 14.8 16.0 16.6 16.3  1  2  3  0     tr 000000  1016.2   0.0  0.0  1.9
    15 1 S   1  8 02 13.3  66 18.9  6.8  4.3 11.9 12.4 14.4 15.7 16.2 16.2  1  0  1  0    0.6 000000  1011.1   1.8  0.0  2.6
    16 8 S   4  5 61 12.7 100 17.0 12.5 11.9 14.5 15.5 16.0 16.5 16.5 16.5  1  3  3  0    5.1 000000  1003.8   2.1  0.0  2.0
    17 6 SW  3  7 25 14.3  98 17.0 10.5  9.4 14.3 13.9 15.0 15.8 16.2 16.2  1  2  3  0    1.0 000t00  1002.2   0.2  0.0  2.8
    18 7 S   4  7 01 15.5  64 18.5 10.5  8.0 13.5 14.0 14.5 15.5 16.0 16.0  1  0  0  0   10.4 000000   992.9   7.3  0.0  3.1
    19 8 SE  1  6 61 13.5  94 15.5 13.5 12.7 13.5 14.0 14.5 15.5 16.0 16.0  2  3  3  0   25.4 000000   991.8  11.6  0.0  0.3
    20 8 E   3  5 63 15.0  98 16.5 13.0  9.4 15.0 15.0 15.0 15.5 16.0 16.0  2  3  3  0   12.3 000000   986.3   4.2  0.0  0.9
    21 6 S   4  7 01 15.5  79 19.0 13.0 11.2 15.0 14.5 15.0 16.0 16.0 16.0  1  0  3  0    0.1 000000   991.5   0.0  0.0  1.6
    22 6 SE  1  7 01 15.0  89 18.6 10.0  6.7 14.5 14.5 15.0 16.0 16.0 16.0  1  0  1  0    5.4 000t00   995.5   2.1  0.0  2.0
    23 5 S   3  5 25 16.0  79 17.5 13.5 11.1 14.0 14.5 15.0 16.0 16.0 16.0  1  2  3  0    1.5 000000   997.1   1.9  0.0  1.4
    24 3 SW  5  6 25 14.5  94 17.0 14.0 12.0 14.5 14.5 15.0 16.0 16.0 16.0  1  2  3  0    5.0 000000  1002.7   1.8  0.0  1.0
    25 8 E   2  6 80 13.5  98 16.0 12.0  7.2 14.5 14.5 15.0 15.5 16.0 16.0  1  3  3  0   12.6 000t00  1003.9   6.5  0.0  0.3
    26 7 W   2  6 01 12.5  94 16.5 11.0 10.3 14.5 14.5 15.0 15.5 16.0 16.0  1  2  3  0    5.5 000000  1000.1   3.4  0.0  0.8
    27 8 SW  3  6 60 12.5  93 16.0 11.0  9.5 14.0 14.0 15.0 15.5 16.0 16.0  1  2  3  0    3.4 000000   992.0   1.5  0.0  0.4
    28 4 SW  3  5 03 12.5  94 15.0  9.5  6.1 12.0 13.0 13.0 15.0 16.0 16.0  1  1  1  0    7.8 000000   998.0   2.3  0.0  1.4
    29 8 SW  4  5 95 12.0  94 14.5 11.5 11.4 13.5 14.0 14.5 15.0 15.5 15.5  2  3  3  0   20.9 000T00   991.6   4.0  0.0  0.4
    30 8 W   4  5 53 12.5 100 13.5 10.0  7.8 13.0 13.0 13.5 14.5 15.0 15.5  2  3  3  0    3.9 000000   994.8   4.1  0.0  1.2
    ------------------------------------------------------------------------------------------------------------------------
    Mean
       6             14.9  86 18.3 11.6  9.2 14.8 14.8 15.5 16.3 16.5 16.2                            1007.0
    Total                                                                               174.3                 73.3  0.0 48.7
    ------------------------------------------------------------------------------------------------------------------------
    (.)  Difference from 1989-98 average used by the Climatological Observers Link.           Rainfall was 231% of average
    Air temperatures                    Weather (No. days occurrence)                         but 189% of 1961-90 average.
      Mean maximum     18.3    (+1.1)        Sleet/snow falling          0      ( 0.0)        Most in a day: 33.8 mm on 6th.
      Mean minimum     11.6    (+1.7)        Snow lying (at 09GMT)       0      ( 0.0)        No. of days with:
      Mean             15.0    (+1.4)        Hail  <5 mm                 0      [-0.5]        >=0.2 mm        20      (+ 6.3)
      No. days <0.0C      0    ( 0.0)        Hail >=5 mm                 0    [all hail]      >=1.0 mm        18      (+ 6.9)
      Mean grass min    8.9    (+1.0)        Thunder heard               4      (+3.5)        >=5.0 mm        12      (+ 6.9)
      Lowest grass min  4.2    (+1.3)        Gales                       1                    Lysimeter:
      No. days <0.0C      0    ( 0.0)        Fog (at 09GMT)              0                           PE      43.4 mm
                                                                                                     PWB    130.9 mm
      Highest maximum 26.3C on 5th. Lowest minimum  6.8 on 15th.                                     PWS    143.2 mm
      Minimum relative humidity:  48% on 15th                                                        PWD    -12.2 mm
    * Warmest Sep on record since 1979. Wettest since 1976 & 7th wettest since 1928.          Piche:         48.7 ml
    ------------------------------------------------------------------------------------------------------------------------
    Key: Observations at 09GMT...
      DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
      V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
      ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 05 haze, 25 shower in past hour
      53 continuous moderate drizzle, 60 intermittent slight rain,  61 continuous slight rain, 63 cont. mod. rain,
      80 slight rain shower, 95 thunderstorm.
      Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
      SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
      'Recording Atmospheric Depositions on Grass' page.
    24 hour observations...
      Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
      Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
      Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
    Monthly observations...
      PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
    Weather: days with...
      s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 3 snow pellets,
      4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog at 09GMT.
    
    ------------------------------------------------------------------------------------------------------------------------
    

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    October 1999

                              CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR OCTOBER 1999
    ------------------------------------------------------------------------------------------------------------------------
      -09GMT-->      -Air Temperature-       --Soil temp--  --Earth temp-- -State Grd.-       Weather         Rain  Fr. Pch
    DD N dd ff  V ww Temp  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E  C Gr SS   Rain SLHTGF   Press   hrs  hrs Evap
    ------------------------------------------------------------------------------------------------------------------------
    01 8 SW  6  5 25 11.0  86 12.5  9.5  8.4 10.5 12.0 13.0 14.0 15.0 15.0  2  3  3  0   21.5 0000G0   995.9  13.2  0.0  1.0
    02 4 W   6  7 02  9.5  76 12.5  6.0  3.8  9.5 10.5 12.0 13.5 15.0 15.0  2  1  3  0    6.0 000000   989.8   5.9  0.0  1.2
    03 8 NW  3  6 62 10.0  93 13.5  7.5  4.9 10.0 10.5 11.0 13.0 14.0 15.0  1  3  3  0    0.9 004000  1000.1   1.0  0.0  0.9
    04 2 N   4  6 01  9.8  73 12.5  7.0  4.1  9.8 10.4 11.7 13.1 14.0 14.8  1  1  3  0    0.1 000000  1015.8   0.0  0.0  1.1
    05 5 SE  1  8 03  8.6  85 14.5  5.6  2.2  9.7 10.2 11.5 12.8 13.8 14.3  1  0  1  0    0.0 000000  1026.1   0.0  0.0  1.2
    06 6 S   1  8 02  9.7  72 13.8  4.7  2.0  8.0  9.2 11.0 12.4 13.5 14.2  1  0  1  0    7.8 000000  1028.7   4.0  0.0  1.8
    07 8 NW  1  7 02 11.7  98 14.2  9.6  7.8 12.0 12.1 12.1 12.6 13.2 14.2  1  2  3  0    5.6 000000  1024.2   4.2  0.0  0.5
    08 8 SW  2  6 02 14.2  93 14.6 11.6 11.4 14.5 13.0 13.0 13.2 13.4 14.0  1  2  3  0    1.5 000000  1022.0   5.1  0.0  0.5
    09 8 SW  3  5 02 13.5  95 15.0 12.7 12.2 13.5 13.5 13.5 13.5 13.6 13.8  1  2  3  0    1.2 000000  1022.0   2.6  0.0  0.2
    10 8 S   3  6 20 14.0  99 15.5 13.4 13.0 14.2 14.2 14.0 13.8 13.8 13.9  1  2  3  0    1.2 000000  1021.2   0.2  0.0  0.7
    11 1 W   2  7 01  8.7  89 14.5  5.0  1.8  8.5 10.0 12.0 13.2 13.8 13.9  1  0  1  0    0.0 000000  1028.0   0.0  0.0  1.3
    12 3 S   1  7 05  9.4  88 15.0  6.2  2.6  8.3  9.6 11.2 12.6 13.5 13.9  1  0  1  0    0.0 000000  1032.3   0.0  0.0  1.0
    13 1 SW  1  7 01 10.0  82 15.5  6.4  3.4  8.2  9.3 11.0 12.2 13.0 13.8  1  0  1  0    0.0 000000  1032.7   0.0  0.0  1.1
    14 1 NE  1  7 01 10.5  94 15.9  7.3  4.3  9.4 10.0 11.0 12.0 12.9 13.8  1  0  1  0    0.0 000000  1030.9   0.0  0.0  1.2
    15 5 SE  2  7 05 11.8  81 17.8  8.2  4.0  9.3 10.0 11.1 12.1 12.8 13.7  1  0  1  0    0.0 000000  1022.7   0.0  0.0  1.2
    16 8 00  0  7 05 12.0  90 17.0  9.4  6.6 11.5 11.5 12.0 12.3 12.9 13.4  1  0  1  0    0.0 000000  1023.9   0.0  0.0  0.7
    17 1 E   1  6 05 10.8  82 15.5  8.6  5.5 10.2 11.3 12.3 12.7 13.0 13.5  1  0  1  0    0.0 000000  1021.6   0.0  0.0  1.5
    18 1 E   3  7 05  8.0  75 13.5  7.0  3.5  7.9  9.5 11.2 11.2 13.0 13.4  1  0  1  0    0.0 000000  1021.6   0.0  0.0  1.7
    19 3 E   5  7 05  7.3  77 12.7  4.6  0.2  6.5  8.2 10.1 11.5 12.6 13.3  1  0  1  0    0.0 000000  1017.8   0.0  0.0  1.5
    20 3 SE  4  5 04  7.0  78 10.9  5.7  2.5  7.0  8.0  9.7 11.0 12.2 13.2  1  0  1  0    0.0 000000  1010.3   0.0  0.0  1.5
    21 8 E   2  5 02  8.9  82 12.0  6.9  5.7  8.7  9.3 10.0 11.0 12.0 13.0  0  0  0  0    3.2 000000   998.5   2.3  0.0  0.8
    22 2 S   1  6 05 12.0  83 16.2  8.5  6.0  9.2  9.8 10.2 11.0 12.0 12.9  1  2  3  0     tr 000000   990.0   0.0  0.0  1.4
    23 7 00  0  6 03 10.7  91 14.5  8.7  4.4  9.5 10.0 10.6 11.2 12.0 12.7  1  1  1  0    1.7 000000   983.0   3.2  0.0  1.3
    24 8 E   1  6 61 10.5  97 11.0  8.3  4.5  9.5 10.0 10.7 11.3 12.0 12.7  1  3  3  0   22.3 000000   979.0  24.0  0.0  0.0
    25 8 NW  1  5 61 11.0 100 13.2 10.1  9.7 10.9 11.0 11.2 11.4 11.9 12.5  1  3  3  0    1.8 000000   987.8   0.7  0.0  0.3
    26 7 NW  1  5 01 11.0 100 13.5  9.5  6.7 10.9 11.0 11.5 11.8 12.0 12.5  1  2  3  0     tr 000000  1014.6   0.0  0.0  0.8
    27 7 S   5  7 02 11.7  88 14.0  9.6  7.3 10.7 11.0 11.5 11.9 12.1 12.6  1  0  3  0    5.6 000000  1020.8   4.0  0.0  2.0
    28 3 00  0  7 01  7.7  99 14.2  7.0  2.5  8.6 10.0 11.2 11.7 12.2 12.6  1  2  1  0    0.0 000000  1022.7   0.0  0.0  1.1
    29 7 SW  2  7 02 11.4  86 18.0  4.6  0.0  8.8  8.9 10.0 11.1 12.0 12.6  1  0  1  0    1.7 000000  1022.7   0.9  0.0  3.1
    30 7 S   6  7 03 15.5  79 16.5 11.4  9.3 12.5 12.1 11.7 11.7 11.8 12.3  1  0  0  0    9.4 0000G0   996.8   1.9  0.0  3.0
    31 2 S   6  5 05 11.2  74 13.7  9.4  6.8  9.0  9.8 10.6 11.4 12.0 12.5  1  0  0  0    5.4 0000G0  1010.3   2.1  0.0  2.4
    ------------------------------------------------------------------------------------------------------------------------
    Mean
       5             10.6  87 14.3  8.1  5.4  9.9 10.5 11.4 12.2 12.9 13.5                            1013.3
    Total                                                                                96.9                 75.3  0.0 38.0
    ------------------------------------------------------------------------------------------------------------------------
    (.)  Difference from 1989-98 average used by the Climatological Observers Link.           Rainfall was 89% of average
    Air temperatures                    Weather (No. days occurrence)                         and 84% of 1961-90 average.
      Mean maximum     14.3    (+0.5)        Sleet/snow falling          0      ( 0.0)        Most in a day: 22.3 mm on 24th.
      Mean minimum      8.1    (+0.4)        Snow lying (at 09GMT)       0      ( 0.0)        No. of days with:
      Mean             11.2    (+0.4)        Hail  <5 mm                 1      [-0.2]        >=0.2 mm        16      (- 3.2)
      No. days <0.0C      0    ( 0.0)        Hail >=5 mm                 0    [all hail]      >=1.0 mm        15      (- 0.7)
      Mean grass min    5.4    (-0.1)        Thunder heard               0      (-0.5)        >=5.0 mm         8      (+ 0.6)
      Lowest grass min  0.0    (-0.5)        Gales                       3                    Lysimeter:
      No. days <0.0C      0    (-2.6)        Fog (at 09GMT)              0                           PE      17.5 mm
                                                                                                     PWB     79.4 mm
      Highest maximum 18.0C on 29th. Lowest minimum  4.6 on 19 & 29th.                               PWS     85.3 mm
      Minimum relative humidity:  57% on  5th                                                        PWD     -5.9 mm
    *                                                                                         Piche:         38.0 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,
      20 drizzle in past hour, 25 shower in past hour, 61 continuous slight rain, intermittent moderate rain.
      Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
      SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
      'Recording Atmospheric Depositions on Grass' page.
    24 hour observations...
      Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
      Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
      Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
    Monthly observations...
      PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
    Weather: days with...
      s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 3 snow pellets,
      4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog at 09GMT.
    
    ------------------------------------------------------------------------------------------------------------------------
    

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    November 1999

                              CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR NOVEMBER 1999
    ------------------------------------------------------------------------------------------------------------------------
      -09GMT-->      -Air Temperature-       --Soil temp--  --Earth temp-- -State Grd.-       Weather         Rain  Fr. Pch
    DD N dd ff  V ww Temp  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E  C Gr SS   Rain SLHTGF   Press   hrs  hrs Evap
    ------------------------------------------------------------------------------------------------------------------------
    01 8 S   6  5 60 11.7  96 12.4  9.5  9.5 11.0 10.8 11.0 11.3 11.8 12.3  1  3  3  0    6.1 000000   999.3   4.7  0.0  0.9
    02 7 SW  2  7 80  7.5  93 11.5  6.9  3.8  7.7  8.8 10.0 11.0 11.8 12.2  1  2  3  0    1.3 000000  1015.4   2.4  0.0  1.4
    03 7 SW  4  6 02 11.5  88 12.7  7.5  6.2 10.0 10.0 10.5 11.0 11.5 12.0  1  2  3  0    0.2 000000  1026.5   0.0  0.0  1.6
    04 8 SW  5  7 02 11.5  85 12.5 10.6  9.3 10.1 10.3 10.8 11.1 11.6 12.2  1  2  3  0   26.3 000000  1018.1   8.3  0.0  1.7
    05 8 SW  2  6 63 10.3  96 10.9 10.1  9.8 10.7 11.0 11.0 11.2 11.6 11.8  2  3  3  0   14.0 004000   988.7   6.6  0.0  0.6
    06 6 NW  2  7 01  6.9  87 11.5  5.8  2.8  7.0  8.2  9.5 10.6 11.5 12.0  1  2  3  0    0.1 000000  1012.7   0.0  0.0  0.8
    07 8 SW  2  7 02 10.2  91 11.9  4.0 -0.2  8.5  8.5  9.2 10.2 11.2 12.0  1  0  1  0    0.2 000000  1024.6   0.1  0.0  0.7
    08 7 NW  1  7 01 10.1  91 11.7  9.3  6.8  9.8  9.8 10.1 10.5 11.1 11.8  1  2  3  0    0.4 000000  1031.6   0.6  0.0  0.3
    09 4 NE  2  7 04  8.5  96 11.6  6.0  1.5  7.5  8.8 10.0 10.5 11.1 11.8  1  2  1  0    0.0 000000  1041.2   0.0  0.0  0.3
    10 1 NE  1  7 04  6.2  98 11.3  4.0  0.5  5.3  6.8  8.8  9.8 11.0 11.7  1  0  1  0    0.0 000000  1044.3   0.0  0.0  0.6
    11 7 NE  3  7 04  8.6  85  9.6  5.7  2.0  8.0  8.5  9.0  9.8 10.8 11.5  1  1  1  0     tr 000000  1043.6   0.0  0.0  0.7
    12 8 NE  1  5 51  8.3  96  9.6  8.0  7.3  8.5  8.9  9.2  9.9 10.7 11.5  1  2  3  0    0.2 000000  1036.6   0.0  0.0  0.4
    13 7 NE  1  7 50  9.0  96 11.2  8.1  6.7  8.9  9.0  9.5 10.0 10.6 11.4  1  1  3  0     tr 000000  1032.3   0.0  0.0  0.7
    14 7 NE  1  5 25  9.5  93 10.9  5.2  1.5  8.5  8.8  9.4 10.0 10.6 11.4  1  1  3  0    0.7 000000  1028.3   1.5  0.0  0.3
    15 6 NW  2  3 42  7.7 100 10.2  7.0  4.5  8.3  9.0  9.7 10.0 10.6 11.4  1  2  3  0    4.8 000000  1025.7   2.5  0.0  0.2
    16 5 NW  3  7 01  4.6  98  8.5  2.8 -0.8  5.8  7.0  8.5  9.8 10.5 11.3  1  2  4  0    5.3 004000  1018.9   4.3  0.0  0.7
    17 7 N   4  7 02  5.4  72  7.0  3.8  0.4  5.4  6.6  8.0  9.0 10.0 11.0  1  2  4  0    7.8 004000  1021.2  14.0  0.0  0.7
    18 6 N   5  7 01  4.1  82  5.9  3.7  1.7  5.5  6.7  8.0  8.8 10.0 11.0  1  2  3  0    0.0 000000  1015.4   0.0  0.0  2.4
    19 7 NE  5  7 01  5.7  82  7.7  4.1  2.5  5.0  5.5  7.0  8.3  9.8 10.8  1  0  0  0     tr 000000  1025.4   0.0  0.0  1.3
    20 2 N   3  7 05  5.1  78  9.2  3.3  0.0  4.0  5.1  6.6  7.8  9.2 10.8  1  0  1  0    0.0 000000  1028.7   0.0  0.0  1.2
    21 6 NE  1  7 04  0.3  86  7.5 -0.4 -3.5  2.5  4.0  5.9  7.2  8.9 10.2  3  0  7  0    3.8 000000  1023.5   5.0  8.5  0.8
    22 6 NW  2  7 01  5.4  98  9.9  0.3 -1.8  5.9  6.3  7.2  7.2  8.5 10.1  1  2  3  0    0.4 000000  1016.6   0.6  0.0  0.4
    23 8 SW  2  5 02  9.9  95 11.1  5.4  2.9  8.0  7.7  7.6  7.8  8.5 10.0  1  2  3  0    2.2 000000  1018.5   1.6  0.0  1.4
    24 8 S   7  4 63 10.8  94 11.4  9.9  9.1  9.3  9.3  8.9  8.7  9.0 10.0  1  3  3  0   22.8 000000  1014.6   4.9  0.0  0.1
    25 2 SW  2  7 04  7.8  96 11.7  6.2  3.0  7.0  7.8  9.0  9.0  9.4  9.9  1  2  1  0    0.2 000000  1021.2   0.0  0.0  2.0
    26 8 S   7  5 60 10.7  85 11.4  7.8  6.6  9.2  9.3  9.2  9.4  9.4  9.9  1  3  3  0    7.0 0000G0  1007.5   2.2  0.0  1.1
    27 6 SW  2  7 05  5.9  89 12.2  5.1  2.3  5.0  6.2  7.8  8.6  9.5 10.0  1  2  1  0    0.3 000000  1016.2   0.4  0.0  2.3
    28 8 S   7  5 60 11.6  87 12.0  5.9  4.2  9.5  9.3  9.0  9.0  9.4 10.0  1  2  3  0    6.9 0000G0   998.9   7.1  0.0  1.0
    29 5 W   1  7 05  2.5  93 10.5  2.5 -0.4  4.8  6.4  8.0  8.8  9.5 10.2  1  1  5  0    0.1 000000  1018.5   0.0  0.0  1.1
    30 7 SW  6  5 02 10.5  90 11.7  2.5 -0.2  8.0  7.5  7.5  8.0  9.0 10.0  1  1  0  0    0.9 000000  1019.7   0.3  0.0  1.0
    ------------------------------------------------------------------------------------------------------------------------
    Mean
       6              7.9  90 10.6  5.7  3.3  7.5  8.1  8.9  9.5 10.3 11.1                            1021.1
    Total                                                                               112.0                 67.1  8.5 28.7
    ------------------------------------------------------------------------------------------------------------------------
    (.)  Difference from 1989-98 average used by the Climatological Observers Link.           Rainfall was 91.2% of average
    Air temperatures                    Weather (No. days occurrence)                         and 90.7% of 1961-90 ave.
      Mean maximum     10.6    (+0.2)        Sleet/snow falling          0      (-0.6)        Most in a day: 26.3 mm on 4th.
      Mean minimum      5.7    (+0.8)        Snow lying (at 09GMT)       0      (-0.2)        No. of days with:
      Mean              8.2    (+0.5)        Hail  <5 mm                 3      [+0.1]        >=0.2 mm        21      (+ 0.5)
      No. days <0.0C      1    (-2.0)        Hail >=5 mm                 0    [all hail]      >=1.0 mm        12      (- 4.2)
      Mean grass min    3.3    (+0.8)        Thunder heard               0      (-0.6)        >=5.0 mm         8      (+ 0.1)
      Lowest grass min -3.5    ( 0.0)        Gales                       2                    Lysimeter:
      No. days <0.0C      6    (-8.8)        Fog (at 09GMT)              0                           PE       8.5 mm
                                                                                                     PWB    103.5 mm
      Highest maximum  12.7C on 3th. Lowest minimum -0.4 on 21st.                                    PWS    104.6 mm
      Minimum relative humidity:  64% on 20th. *Hi max lowest on record for November!                PWD     -1.1 mm
    * Mean 8.2C 4th warmest and Mean min 3rd warmest on record.                               Piche:         28.7 ml
    ------------------------------------------------------------------------------------------------------------------------
    Key: Observations at 09GMT...
      DD date; N cloud (oktas, 9=obscured); dd wind direction (8 sectors, 00=calm); ff wind speed (Beaufort scale);
      V visibility (0 dense fog, 1 thick fog, 2 fog, 3 moderate fog, 4 very poor, 5 poor, 6 moderate, 7 good, 8 very good);
      ww present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 04 smoke haze, 05 haze,
      25 shower in past hour, 42 fog thinning, 50 sl. drizzle, 51 cont. mod. drizzle, 60 int. sl. rain, 63 cont. mod. rain
      Temperatures (degC); RH relative humidity (%); soil temperatures are under bare soil and earth under grass (degC);
      SS snow depth (cm); Press air pressure, aneroid (mb). For state of the ground E, concrete C, and grass Gr codes consult
      'Recording Atmospheric Depositions on Grass' page.
    24 hour observations...
      Max maximum temperature (degC) beginning 09GMT; Min minimum temperature ending 09GMT;
      Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap Piche evaporation (ml) beginning 09GMT;
      Rain rainfall beginning 09GMT (mm); Rain hrs hours of rainfall (>0.1mm/hr) 09-09GMT; Fr. hrs hours of frost (00-24GMT).
    Monthly observations...
      PE Potential evapotranspiration, PWB Potential water balance, PWS Potential water surplus, PWD Potential water deficit.
    Weather: days with...
      s slight or S heavy snow/sleet falling; L >=50% snow cover at 09GMT; H categories of hail: 3 snow pellets,
      4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog at 09GMT.
    ------------------------------------------------------------------------------------------------------------------------
    

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    December 1999

    
                              CLIMATOLOGICAL OBSERVATIONS AT LLANSADWRN, ANGLESEY, FOR DECEMBER 1999
    ------------------------------------------------------------------------------------------------------------------------
      -09GMT-->      -Air Temperature-       --Soil temp--  --Earth temp-- -State Grd.-       Weather         Rain  Fr. Pch
    DD N dd ff  V ww Temp  RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm 100cm E  C Gr SS   Rain SLHTGF   Press   hrs  hrs Evap
    ------------------------------------------------------------------------------------------------------------------------
    01 6 W   2  7 02  7.2  85  8.8  7.2  4.6  6.8  7.5  8.1  8.5  9.2 10.0  1  2  3  0     tr 000000  1020.1   0.0  0.0  1.2
    02 7 W   2  7 05  4.7  82 11.0  3.9  0.8  4.4  5.7  7.2  8.1  8.9 10.0  1  0  1  0   15.1 000000  1023.1   5.5  0.0  1.4
    03 7 W   7  7 01  7.5  80  7.5  4.7  3.7  7.8  8.2  8.1  8.2  8.8 10.0  1  3  3  0     tr 0040G0   998.9   0.0  0.0  1.4
    04 6 NW  4  6 87  4.0  83  6.0  3.2  0.4  3.7  4.8  6.1  7.3  8.7  9.9  1  1  4  0     tr 004000  1008.7   0.0  0.0  0.7
    05 7 SW  1  7 04  1.4  96 10.2  1.0 -2.1  2.2  3.7  5.2  6.5  8.1  9.8  1  0  5  0    5.4 000000  1023.1   4.1  0.0  0.7
    06 8 SW  5  5 50 10.2  96 10.7  1.4 -0.1  8.5  8.0  7.3  7.5  8.2  9.7  1  3  3  0   10.8 000000  1010.3   6.2  0.0  0.8
    07 7 W   4  7 02  6.7  88  9.0  6.1  4.5  6.5  7.2  7.6  7.9  8.2  9.2  1  2  4  0    9.4 005000  1004.6   4.1  0.0  1.4
    08 8 S   5  4 63  9.0  99  9.8  5.0  2.4  7.3  7.0  7.0  7.5  8.4  9.4  2  3  3  0    5.2 0000G0   997.2   2.5  0.0  2.1
    09 8 SW  6  5 61  6.0  86  7.4  5.7  4.2  5.5  6.0  6.8  7.4  8.2  9.4  1  3  3  0    5.9 0000G0   980.8   5.1  0.0  0.4
    10 6 SW  1  6 10  3.6  98  9.8  3.6  0.2  4.5  5.6  6.5  7.1  8.2  9.2  1  2  4  0    8.5 004000   998.9   8.5  0.0  0.6
    11 8 SW  3  5 60  9.5  99  9.7  3.5  1.2  8.2  7.7  7.2  7.4  8.0  9.1  1  3  3  0   26.5 000000   981.2  13.2  0.0  0.4
    12 8 00  0  5 63  5.0 100  5.7  5.0  4.6  6.2  6.8  7.2  7.5  8.2  8.8  2  3  3  0   10.3 000000   985.2   6.1  0.0  0.3
    13 7 NW  1  7 01  3.9  93  4.7  2.7 -0.4  3.6  4.5  5.7  6.8  7.9  8.9  1  2  6  0    8.7 004000   998.5   6.3  0.0  0.1
    14 8 SE  1  4 85  0.5 100  4.0 -0.2 -3.0  1.6  3.0  4.6  5.8  7.5  8.8  6  7  9  1    1.3 s15t00   997.6   0.8  1.8  1.5
    15 6 NE  4  7 03  3.7  70  5.5  0.5  0.1  2.2  3.3  4.4  5.3  6.9  8.5  1  0  0  0    0.2 000000  1022.0   0.0  0.0  1.0
    16 6 N   1  6 80  4.1  98 10.2  3.1 -1.0  2.5  3.5  4.5  5.0  6.8  8.2  1  2  4  0   15.6 0000G0  1025.7   7.0  0.0  1.1
    17 7 W   2  6 02  9.0 100  9.0  4.1  1.1  7.5  6.9  6.1  6.2  6.7  8.2  1  2  3  0     tr 000000  1000.1   0.0  0.0  0.6
    18 4 00  0  8 04  0.2  76  2.7 -0.6 -5.3  1.6  3.2  4.8  5.5  6.7  8.0  1  1  7  0    0.0 000000  1014.6   0.0  1.6  0.9
    19 1 N   4  8 01  1.2  64  3.8 -0.1 -3.5  1.1  2.3  3.5  4.8  6.5  7.9  3  0  5  0    0.0 000000  1023.1   0.0  2.6  1.1
    20 7 00  0  7 04  0.0  84  7.2 -2.2 -5.5  0.6  1.6  2.9  3.8  5.6  7.8  3  0  7  0    0.9 000000  1028.0   1.7  6.8  2.3
    21 2 S   1  6 01  7.0  94 10.0  0.8 -0.7  4.0  3.8  3.7  4.1  5.5  7.6  1  2  3  0    0.0 0000G0  1011.1   0.0  0.0  2.6
    22 8 S   7  6 02 10.0  69 10.2  7.0  4.4  6.1  5.7  5.1  5.2  5.5  7.5  1  1  0  0    5.7 000000  1004.6   5.0  0.0  1.6
    23 7 S   3  6 60  7.4  80  9.5  5.1  2.3  4.5  5.0  5.2  5.8  6.2  7.5  1  1  3  0   11.7 0000G0  1008.3   4.2  0.0  2.2
    24 7 S   4  5 01  8.0  79 10.8  7.2  4.9  5.7  6.0  6.2  6.3  6.7  7.5  1  2  4  0    5.6 0050G0   991.3   3.8  0.0  1.7
    25 7 SW  3  7 01  2.7  91  5.7  2.7  1.2  3.9  5.0  6.0  6.3  6.1  7.5  1  2  6  0    8.5 005T00   979.5   0.5  0.0  1.6
    26 7 W   4  7 01  3.5  97  5.1  2.7  0.2  2.0  3.5  4.8  5.5  6.5  7.7  5  6  6  0    2.0 106000   979.0   2.2  0.0  0.5
    27 7 W   1  7 87  3.5  91  4.5  2.8 -0.5  2.5  3.2  4.0  5.0  6.2  7.6  1  2  6  0    3.1 005000   988.7   1.8  0.0  0.1
    28 7 NW  1  7 87  1.2  96  5.2  0.3 -2.7  1.2  2.3  3.5  4.7  5.9  7.5  5  5  6  0    1.0 004000  1001.4   0.2  0.0  0.2
    29 4 NW  1  7 02  1.1 100  7.0  0.5 -3.2  1.0  1.8  3.0  3.8  5.5  7.4  3  4  7  0   12.8 000000  1015.4   6.1  0.0  1.3
    30 8 SW  3  4 63  5.8  97  8.0  1.0 -2.1  4.0  3.5  3.4  4.0  5.2  7.1  2  3  3  0   13.2 000000  1013.9   6.2  0.0  0.2
    31 5 S   2  7 01  7.1  91  9.4  5.8  4.2  5.3  5.2  5.0  5.0  5.5  6.8  1  2  3  0    6.4 000000  1015.0   4.6  0.0  0.3
    ------------------------------------------------------------------------------------------------------------------------
    Mean
       6              5.0  89  7.7  3.0  0.5  4.3  4.9  5.5  6.1  7.1  8.5                            1004.8
    Total                                                                               193.8                105.7 12.8 32.3
    ------------------------------------------------------------------------------------------------------------------------
    (.)  Difference from 1989-98 average used by the Climatological Observers Link.           Rainfall was 166.7% of average
    Air temperatures                    Weather (No. days occurrence)                         and 171.4% of 1961-90 ave.
      Mean maximum      7.7    (-0.1)        Sleet/snow falling          2      (-0.3)        Most in a day: 26.5 mm on 11th.
      Mean minimum      3.0    (+0.2)        Snow lying (at 09GMT)       1      (+0.3)        No. of days with:
      Mean              5.4    (+0.1)        Hail  <5 mm                 5      [+7.0]        >=0.2 mm        24      (+ 4.7)
      No. days <0.0C      4    (-2.4)        Hail >=5 mm                 6    [all hail]      >=1.0 mm        22      (+ 7.3)
      Mean grass min    0.5    (+0.2)        Thunder heard               2      (+1.6)        >=5.0 mm        18      (+10.0)
      Lowest grass min -5.5    (+0.6)        Gales                       7                    Lysimeter:
      No. days <0.0C     13    (-1.8)        Fog (at 09GMT)              0                           PE       0.9 mm
                                                                                                     PWB    192.9 mm
      Highest maximum 11.0C on 2nd lowest since 1993. Lowest minimum  -2.2C on 20th.                 PWS    192.9 mm
      Minimum relative humidity:  53% on 20th.                                                       PWD      0.0 mm
    * Most no. days (11) with hail (all types) in December on record (1979).                  Piche:         32.3 ml
      Wettest December since 1994 (when 205.1 mm) and 5th wettest on record (since 1928).
    ------------------------------------------------------------------------------------------------------------------------
    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,
      50 slight drizzle, 60 intermittent sl. rain, 61 continuous sl. rain, 63 cont. moderate rain, 80 sl. rain 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: 3 snow pellets,
      4 ice pellets, 5 hail 5-9 mm, 6 hail 10-19 mm; t slight or T heavy thunder heard; G gale; F fog at 09GMT.
    ------------------------------------------------------------------------------------------------------------------------
    

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    Annual 1999

    Annual summary statistics at Llansadwrn, Anglesey for 1999
    
    (.)  Difference from 1989-98 average used by the Climatological Observers Link.           Total rainfall 1286.1 mm
    Air temperatures                    Weather (No. days occurrence)                         was 126% of average
      Mean maximum     13.6    (+0.1)        Sleet/snow falling         10      (-2.2)        Most in a day: 33.8 (Sep 6),
      Mean minimum      7.4    (+0.6)        Snow lying (at 09GMT)       2      (-1.2)        31.2 mm (Jan 5).
      Mean             10.5    (+0.4)        Hail  <5 mm                25     [+17.8]        No. of days with:
      No. days <0.0C     13    (-8.5)        Hail >=5 mm                12    [all hail]      >=0.2 mm       226      (+27)
      Mean grass min    5.3    (+0.8)        Thunder heard              11      (+4.9)        >=1.0 mm       178      (+27)
      Lowest grass min -6.3    (+0.9)        Gales                      30                    >=5.0 mm        95      (+26)
      No. days <0.0C     51   (-16.8)        Fog (at 09GMT)              3                    Lysimeter:
                                                                                                     PE     671.0 mm
      Highest maximum  27.5 on Jul 31st. Lowest minimum  -2.2 on Dec 20th.                           PWB    615.1 mm
      Minimum relative humidity:  45% on  Apr 19th.                                                  PWS    926.3 mm
    * Wettest year since 1967. Frost-free (air) from Apr 17th to Nov 20th.                           PWD   -311.2 mm
                                                                                              Piche:       440.8 mls 
    ------------------------------------------------------------------------------------------------------------------------
    
    Comparison of annual values with recent years
    
         -Air Temperature-     Earth         --------------Weather--------------
    Year   Max  Min  Mean Gmin  30cm   Rain    AF   GF   SF   SL    H    T    F
    
    1991  13.1  6.2   9.7  4.5  10.2   832.2   35   75    9    4   12    3    1
    1992  13.1  6.6   9.8  5.0  10.5  1209.7   21   64    0    0   15   11    2
    1993  12.8  6.3   9.6  4.7  10.4  1001.0   18   60    9    1   20    5    8
    1994  12.9  6.8   9.9  5.0  10.7  1185.8   15   61   10    3   11    7    1
    1995  13.8  7.1  10.5  5.2  11.4   895.8   21   66   35    8   33    6    4
    1996  12.8  6.2   9.5  3.9  10.4   793.7   40   90   22    7   29    8    2
    1997  14.0  7.4  10.7  4.8  11.4  1008.3   17   80    7    5   19    8    1
    1998  13.6  7.5  10.6  5.3  11.5  1215.5    9   60    7    0   36    9    2
    1999  13.6  7.4  10.5  5.3  11.6  1286.1   13   51   10    2   37   11    3
    
    ------------------------------------------------------------------------------------------------------------------------
    
    Annual data for 1999
    
       No. of days occurrence at 0900 GMT.
    
       Cloud cover               Wind direction           Wind speed          Visibility    Code        Description
    
       Cloud obscured      4     N           30           Calm        28      <100 m           0        Dense fog        0
       8/8 cloud         113     NE          40           Force 1-3  235      100-190 m        1        Thick fog        2
       6/8 to 7/8        149     E           18           Force 4-5   80      200-390 m        2        Fog              1
       3/8 to 5/8         54     SE          13           Force 6-7   22      400-900 m        3        Mod. fog         2
       1/8 to 2/8         39     S           56           Force 8-12   0      1.0-1.9 km       4        Very poor       18
       Sky cloudless       6     SW         111                               2.0-3.9 km       5        Poor            82
                                 W           33           Days       365      4.0-9.0 km       6        Moderate        65
       Days              365     NW          36                               10 km or more    7        Good           195
                                 Calm        28
                                                                                                           Days        365
                                 Days       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)
    
       Code  0   1   2   3  4    5   6    7    8    9 Days
    
       Jan   3   3   1  15  2    2   0    5    0    0   31
       Feb   2  10   1   7  1    3   3    0    0    1   28
       Mar   1   8   1  16  4    1                      31
       Apr   0   7   0  18  3    0   1    0    0    1   30
       May   3  13   0  15  0                           31
       Jun   1  15   0  13  1    0                      30
       Jul   1  20   0  10  0    0                      31
       Aug   0  19   1  11                              31
       Sep   3  12   0  15                              30
       Oct   3  15   0  13                              31
       Nov   2   7   0  17  2    1   0    1             30
       Dec   2   1   0  12  5    2   5    3    0    1   31
    
        Yr  21 130   4 162 18    9   9    9    0    3  365
    
       State of ground
    
       Code  0   1   2   3  4    5   6    7    8    9 Days
    
       Jan   0  17  10   4  0    0   0    0             31
       Feb   0  24   1   2  0    0   1    0             28
       Mar   0  28   2   1                              31
       Apr   3  24   1   1  0    0   1                  30
       May  14  17                                      31
       Jun  11  19                                      30
       Jul  19  12                                      31
       Aug   7  24   0                                  31
       Sep   5  21   4                                  30
       Oct   1  28   2                                  31
       Nov   0  28   1   1                              30
       Dec   0  22   3   3  0    2   1    0    0        31
    
        Yr  60 264  24  12  0    2   3    0    0    0  365
    
       State of concrete
    
       Code  0   1   2   3  4    5   6    7    8    9 Days
    
       Jan   1   6  13   7  4                           31
       Feb   9   2  13   2  0    1   1    0    0    0   28
       Mar  13   2  11   5                              31
       Apr  10   2  12   5  0    1                      30
       May  18   1   6   6                              31
       Jun  22   3   2   3                              30
       Jul  25   3   2   1                              31
       Aug  22   1   3   5                              31
       Sep  15   2   7   6                              30
       Oct  17   3   7   4                              31
       Nov   5   5  16   4                              30
       Dec   5   4  11   7  1    1   1    1         0   31
    
        Yr 162  34 103  55  5    3   2    1    0    0  365
    
    


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