PITSFORD HALL WEATHER STATION CLIMATOLOGICAL OBSERVATIONS APRIL 2003 Observations at Pitsford Hall at 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th 17th 18th 19th 20th 21st 22nd 23rd 24th 25th 26th 27th 28th 29th 30th 0900 hours UTC Total Cloud 7 2 1 0 3 7 0 0 0 6 1 n/a n/a 4 4 0 0 0 7 7 9 6 5 5 7 7 8 8 7 7 Wind Direction sw nw nw nw nw n se ese n n n sse se ne e ne ne ne ene ne ese nw ne ene sse sw ssw ssw ssw ssw Speed (knots) 9 25 12 8 8 8 5 4 4 10 0 2 4 10 2 0 11 10 23 14 3 6 4 12 13 8 14 10 14 14 Weather 3 1 0 0 0 2 0 0 0 22 0 n/a n/a 3 2 0 0 0 3 2 10 1 1 2 3 2 62 51 3 2 Visibility 6 7 8 7 8 7 8 7 7 7 6 n/a n/a 5 6 5 5 5 7 5 4 7 7 6 6 7 6 5 8 7 Screen (C) Dry Bulb 7.0 6.4 4.4 9.4 10.0 8.0 3.8 6.7 6.0 4.8 5.6 6.0 7.5 12.5 11.5 12.8 12.1 11.0 7.4 8.9 12.0 12.9 14.2 10.1 16.0 10.6 10.7 11.0 13.7 12.5 Wet Bulb 5.6 5.0 3.9 8.8 8.0 5.8 2.3 4.2 3.9 3.7 4.5 4.0 6.0 9.6 9.2 10.1 9.5 9.0 5.1 7.5 11.4 10.1 10.4 8.9 13.4 10.0 9.8 10.7 11.4 10.5 Max 12.0 11.0 13.4 18.1 15.3 9.2 11.1 9.2 8.3 6.4 11.0 13.2 17.0 17.1 22.2 25.4 21.5 19.4 9.0 13.1 17.5 16.8 18.0 15.9 16.5 16.4 17.0 13.7 16.7 16.7 Min 4.0 3.1 0.8 4.5 5.4 3.1 -0.3 -2.1 -2.1 -1.2 2.7 -0.6 3.6 7.4 8.0 7.4 7.5 6.9 4.9 6.0 6.9 15.3 4.9 3.0 8.2 5.5 7.7 9.2 6.6 8.6 Ground Observations Grass Min 1.8 -0.1 -3.3 1.5 1.0 n/a n/a -5.6 -6.0 -5.5 0.6 -4.5 -0.2 6.7 4.5 2.7 4.2 4.1 2.5 3.3 5.3 2.5 1.2 -0.9 5.4 2.2 5.4 8.1 4.1 6.4 Conc. Min 3.8 2.0 0.3 4.0 5.0 n/a n/a -2.9 -3.3 -1.6 3.0 -1.0 2.7 8.2 6.5 5.6 6.4 6.2 4.3 5.3 7.1 4.5 4.0 1.8 7.6 4.6 6.6 9.4 4.8 7.6 Bare Earth Min 3.4 2.5 0.6 0.9 4.8 n/a n/a -2.3 -3.4 -2.4 2.7 -0.4 2.6 8.0 6.5 6.0 6.5 6.3 4.5 5.3 7.0 4.3 3.8 2.4 7.7 5.6 6.6 8.6 4.9 7.6 Soil/Earth Temperatures Surface 6.0 5.5 4.0 6.8 9.0 7.0 5.0 9.4 10.0 6.1 8.0 8.0 7.0 11.5 11.0 10.6 9.0 10.6 8.9 11.2 12.7 14.7 16.4 13.1 17.6 14.1 10.7 11.8 11.6 14.0 5cm 6.2 5.0 4.0 7.6 8.0 6.1 4.2 5.0 4.4 5.0 4.9 4.0 6.4 9.7 9.0 9.7 9.4 10.5 10.0 9.2 10.5 10.4 11.2 10.4 12.2 10.0 9.9 10.2 10.8 11.8 10cm 7.0 5.8 4.8 7.8 8.5 6.9 5.3 5.6 4.7 5.2 5.4 4.8 7.0 10.0 9.5 10.4 10.2 11.2 10.6 9.5 10.5 10.6 11.1 10.5 11.8 10.2 10.2 10.4 10.5 11.7 20cm 7.6 6.7 6.4 7.8 8.9 8.0 7.0 6.6 6.1 5.9 6.0 6.0 7.6 10.0 9.8 10.3 11.7 11.6 11.2 9.8 10.4 10.4 10.6 10.7 10.9 10.5 10.6 11.4 10.3 11.1 30cm 7.6 7.5 7.0 7.8 9.0 8.5 8.0 7.4 6.7 6.2 6.2 6.5 7.5 9.0 9.7 10.2 11.5 11.5 11.1 10.0 10.3 10.5 10.8 10.9 10.8 10.9 11.0 11.5 10.9 11.3 40cm 7.6 7.5 7.0 7.6 8.5 8.3 8.0 7.3 6.7 6.2 6.2 6.5 7.5 9.0 9.4 10.1 11.0 11.0 10.8 9.8 10.0 10.4 10.6 10.8 10.7 10.6 10.8 11.2 10.7 11.0 50cm 7.6 7.6 7.5 7.6 8.5 8.5 8.5 7.9 7.5 6.9 6.6 7.0 7.5 8.5 9.4 10.0 10.7 11.0 11.1 10.2 10.3 10.6 10.9 11.0 10.9 11.0 11.1 11.4 11.1 11.3 100cm 7.0 7.2 7.1 7.0 7.2 7.4 7.5 7.6 7.6 7.4 7.4 7.2 7.2 7.4 7.7 8.2 8.5 8.7 8.9 9.1 9.2 9.2 9.2 9.3 9.4 9.6 9.6 9.6 9.7 9.7 State of the Ground Without snow 0 1 0 0 0 0 0 9 9 9 1 0 0 9 9 9 9 9 9 9 9 9 9 9 1 1 1 1 0 9 With snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Snow depth _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ State of the Grass 0 3 1 1 1 1 1 1 0 0 4 1 1 0 0 1 1 1 0 0 1 0 0 0 3 3 3 3 0 0 State of the Concrete 0 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 2 2 0 0 Evaporation Hook-gauge reading 55.32 _ _ _ _ _ _ _ _ 68.05 _ _ _ _ _ _ _ _ 44.77 _ 68.96 _ _ _ _ 68.88 _ _ _ _ Total evaporation (less rainfall) > > > > > > > > > 17.40 > > > > > > > > 23.98 > 2.89 > > > > 8.68 > > > 13.31 Rainfall Total 2.8 _ _ _ _ _ _ _ tr 0.7 _ _ _ _ _ _ _ _ _ 1.3 _ _ _ 5.5 3.1 0.6 3.3 0.2 0.1 0.9 Duration 2.9 _ _ _ _ _ _ _ _ 0.8 _ _ _ _ _ _ _ _ _ 1.8 _ _ _ 1.8 3.0 0.5 4.3 0.1 0.1 0.2 Acidity _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Run of Wind Miles 370.3 123.2 112.1 109 94.8 96.7 34.09 24.19 167.94 79.6 48 117.6 63.2 85 50.2 91.8 135.6 189.22 222.09 166.02 189.72 49.68 93.88 32.46 124.48 235.34 229.52 145.08 305.41 187.54 Mean 20.1 6.7 6.1 5.9 5.1 5.2 1.8 1.3 9.1 4.3 2.6 6.4 3.4 4.6 2.7 5 7.3 10.2 12 9 10.3 2.7 5.1 1.8 6.7 12.7 12.4 7.9 16.5 10.2 Gust 50 40 26 24 21 19 17 16 23 24 <15 <15 25 18 <15 16 22 40 38 26 23 <15 22 16 17 27 29 30 28 30 Sunshine 2.8 6.9 7.1 9.0 8.0 0.0 8.5 10.1 9.1 0.8 5.3 6.6 3.6 0.0 5.0 11.6 11.3 11.1 3.4 6.3 7.5 5.1 10.4 1.4 0.4 6.6 5.0 0.0 8.7 6.0 Statistics Saturated VP(Twb) 0.91 0.873 0.808 1.133 1.073 0.923 0.721 0.825 0.808 0.797 0.843 0.814 0.936 1.196 1.164 1.237 1.188 1.149 0.879 1.037 1.349 1.237 1.262 1.141 1.538 1.229 1.212 1.287 1.349 1.27 VP 0.815 0.778 0.774 1.092 0.937 0.774 0.62 0.656 0.666 0.723 0.769 0.679 0.834 0.999 1.008 1.053 1.011 1.013 0.723 0.942 1.308 1.046 1.003 1.059 1.36 1.188 1.151 1.267 1.192 1.134 Saturated VP 1.002 0.962 0.837 1.18 1.229 1.073 0.802 0.982 0.936 0.861 0.91 0.936 1.037 1.45 1.358 1.479 1.413 1.313 1.03 1.141 1.403 1.489 1.62 1.237 1.819 1.279 1.287 1.313 1.569 1.45 RH % 81.3 80.9 92.5 92.5 76.2 72.1 77.3 66.8 71.2 84 84.5 72.5 80.4 68.9 74.2 71.2 71.5 77.2 70.2 82.6 93.2 70.2 61.9 85.6 74.8 92.9 89.4 96.5 76 78.2 Dew Point 4 3.4 3.3 8.3 6 3.3 0.2 1 1.2 2.3 3.2 1.5 4.4 7 7.1 7.7 7.1 7.2 2.3 6.1 10.9 7.6 7 7.8 11.5 9.5 9 10.5 9.6 8.8 Pressure 1011.1 1014.3 1025.5 1029.2 1032.2 1030.6 1028.1 1026.1 1019.9 1010.7 1009.1 1012.7 1017.4 1011.7 1016.1 1022.5 1027.1 1031.2 1022.8 1011.1 1007.4 1015.6 1018.5 1014.7 1009.4 1003.6 1001.7 991.4 1004.0 1003.6 Days with thunder _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 1 1 hail<5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ hail>/=5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ snow _ _ _ _ _ _ _ _ _ 1 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ fog _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _