PITSFORD HALL WEATHER STATION, NORTHAMPTON, UNITED KINGDOM CLIMATOLOGICAL OBSERVATIONS - MARCH 2002 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 31st 0900 hours UTC Total Cloud 7 1 7 8 5 8 4 9 7 8 7 5 8 8 8 7 9 8 4 7 6 8 4 8 8 1 5 8 2 7 8 Wind Direction ne nw nw wsw nw s nnw s ssw ssw ssw ne ene ene se ssw sse sse nnw nw ssw nw se sse s nw se e e calm ssw Speed (knots) 6 6 7 3 3 8 20 9 15 17 7 1 12 19 14 10 3 6 3 6 6 8 1 8 6 4 0 3 3 0 12 Weather 2 2 2 3 1 3 1 12 3 53 2 3 2 2 2 2 63 2 1 1 2 2 1 2 2 0 40 43 10 3 51 Visibility 6 7 5 7 5 5 6 3 7 5 7 3 5 7 3 7 4 5 6 7 6 7 7 7 7 8 4 3 5 5 5 Screen (C) Dry Bulb 2.9 0.2 5.7 6.2 5.3 8.4 10.9 8.2 5.1 6.9 8.1 3.9 4.9 4.6 5.1 9.6 8.4 7.9 8.0 9.4 10.9 9.9 7.0 5.6 6.8 6.6 1.6 4.3 6.6 9.5 9.1 Wet Bulb 2.4 0.0 5.5 5.4 5.0 6.7 7.4 8.1 4.2 5.8 6.9 3.4 4.4 2.8 4.9 9.0 8.4 7.4 7.5 8.1 10.8 9.1 5.9 4.4 5.6 5.0 0.2 4.0 5.5 7.1 8.4 Max 8.4 7.5 8.8 9.3 12.1 12.0 13.6 13.7 10.7 12.9 12.9 11.5 8.2 8.2 9.5 14.5 13.7 9.6 11.7 13.8 15.8 15.6 12.0 11.1 12.3 11.0 13.1 13.8 15.6 17.3 13.5 Min 0.4 -2.5 0.1 3.0 3.6 4.4 7.9 3.8 0.9 0.0 5.2 -0.8 2.9 1.5 2.2 4.8 5.8 5.7 4.5 7.3 8.9 7.0 5.4 1.3 4.2 2.2 -1.5 -0.5 0.6 1.9 6.1 Ground Observations Grass Min -2.4 -5.2 -0.7 1.3 0.4 2.2 5.8 -0.5 -2.0 -2.6 2.3 2.1 3.9 -1.1 2.5 2.3 2.0 3.8 1.3 3.2 6.1 4.0 4.6 -0.2 3.0 -1.1 0.0 -2.0 -1.9 -0.5 5.1 Conc. Min -1.1 -4.4 -0.9 0.1 1.5 1.0 4.6 0.7 -0.9 -1.8 2.5 -1.0 3.9 -0.2 1.6 3.5 4.1 4.2 3.1 4.9 7.0 5.8 5.1 1.2 3.5 1.1 -1.0 1.0 -0.9 0.8 4.9 Bare Earth Min -0.1 -2.5 -0.6 2.0 2.5 2.7 6.4 2.2 1.0 -0.4 6.5 1.4 3.1 0.2 1.4 4.1 5.0 4.9 4.0 5.1 7.5 6.4 5.2 2.1 4.1 2.0 -1.5 -1.0 0.3 1.6 5.6 Soil/Earth Temperatures Surface 3.1 0.6 5.0 5.7 5.9 6.5 9.0 7.6 5.5 5.7 7.0 4.9 5.2 4.2 _ 8.9 8.3 6.7 6.1 7.3 8.9 8.1 8.9 6.8 7.4 7.1 4.8 4.2 9.2 9.6 9.6 5cm 2.8 1.1 3.8 4.5 4.4 4.8 7.0 6.0 4.3 3.9 5.2 3.8 3.2 2.8 4.6 6.9 7.3 6.8 5.8 7.4 8.8 8.4 8.1 6.2 6.6 5.7 4.1 4.5 5.0 6.4 8.1 10cm 3.6 2.2 4.1 4.8 4.8 5.0 7.4 6.3 5.2 4.1 5.4 4.2 5.6 3.2 4.7 6.6 7.4 7.2 6.4 7.8 9.0 8.7 8.6 6.9 7.1 6.6 4.9 4.7 5.8 6.8 8.2 20cm 4.4 3.7 4.4 4.9 5.3 5.4 7.2 6.6 6.6 5.1 5.8 5.8 6.3 4.9 5.4 6.3 7.4 7.7 7.2 8.2 8.7 8.9 9.1 8.4 7.8 8.0 6.8 6.7 7.1 7.8 8.6 30cm 5.1 4.4 4.5 5.0 5.3 5.5 7.0 6.5 7.0 5.9 6.0 5.9 6.4 5.2 6.1 6.1 7.1 7.8 7.3 8.3 9.1 9.2 9.1 8.9 8.0 7.6 6.6 6.5 7.6 8.0 8.5 40cm 4.9 4.6 4.5 5.2 5.2 5.5 7.0 6.8 6.9 5.9 5.8 3.4 5.9 5.1 5.5 6.1 6.8 7.5 7.5 8.0 9.3 8.8 8.9 8.5 8.3 8.1 7.5 7.4 7.5 7.6 8.3 50cm 5.4 5.2 5.0 5.6 5.2 5.7 6.9 6.9 7.0 6.4 6.0 5.7 6.1 5.5 5.8 6.2 6.8 7.6 7.1 7.8 8.9 7.9 8.9 8.8 8.4 8.6 8.3 8.4 8.0 8.0 8.4 100cm 6.2 5.9 5.9 5.8 5.8 5.9 6.0 6.1 6.2 6.4 6.4 6.2 6.2 6.2 6.4 6.3 6.4 6.6 6.7 7.2 6.8 7.2 7.3 7.4 7.7 7.9 7.4 7.1 7.8 7.6 7.7 State of the Ground Without snow 1 4 1 0 1 0 0 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 With snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Snow depth _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ State of the Grass 3 7 4 1 1 1 0 1 1 1 1 1 1 0 2 1 3 1 1 1 1 1 1 1 1 1 2 2 1 1 3 State of the Concrete 2 0 1 0 0 0 0 1 0 0 1 1 1 1 3 1 2 2 2 2 1 1 0 0 1 1 1 0 0 0 1 Evaporation Hook-gauge reading 73.72 _ _ _ _ _ _ _ 64.28 _ _ _ _ _ _ 68.1 _ _ _ _ _ _ 85.4 _ _ _ _ _ _ 61.74 58.24 Total evaporation (less rainfall) > > > > > > > > 10.24 > > > > > > 5.98 > > > > > > 7.80 > > > > > > 23.66 3.50 Rainfall Total _ 0.3 _ _ _ _ _ 0.5 tr 0.4 0.1 0.2 _ 4.5 4.6 2.5 1.5 14.1 1.0 6.0 tr tr _ _ _ _ _ _ _ 0.1 _ Duration 0.1 _ _ _ _ _ 0.8 0.1 0.7 0.1 1.5 _ 6.5 3.5 2.5 2.5 6.2 1.2 5.2 _ _ _ _ _ _ _ _ _ _ _ Acidity _ _ _ _ _ _ _ _ _ _ _ _ _ 6.63 6.60 6.36 6.59 6.23 6.40 6.34 _ _ _ _ _ _ _ _ _ _ _ Run of Wind Miles 110.52 97.02 72.4 69.04 141.43 164.94 158.65 162.86 227.16 249.24 109.23 120.78 219.85 207.89 124.51 79.69 169.79 123.74 118.34 104.65 104.35 111.4 56.18 99.73 84.29 50.81 52.51 63.86 44.05 131.61 172.57 Mean 6 5.3 3.9 3.7 7.7 8.9 8.6 8.8 12.3 13.5 5.9 6.5 11.9 11.3 6.7 4.3 9.2 6.7 6.4 5.7 5.7 6 3 5.4 4.6 2.8 2.8 3.5 2.4 7.1 9.3 Gust 28 23 16 <15 21 38 39 28 60 44 18 23 34 42 20 18 24 32 20 18 22 23 <15 <15 17 17 <15 <15 <15 22 20 Sunshine 7.4 3.4 0.2 0.1 6.1 0.0 7.9 0.6 5.8 1.0 2.8 4.2 1.9 3.7 0.0 2.5 2.0 0.0 2.2 1.1 4.9 0.9 5.7 0.7 3.7 4.0 7.3 7.5 8.5 7.8 0.5 Statistics Saturated VP(Twb) 0.726 0.611 0.904 0.897 0.873 0.982 1.03 1.081 0.825 0.923 0.995 0.78 0.837 0.747 0.867 1.149 1.103 1.03 1.037 1.081 1.296 1.156 0.929 0.837 0.91 0.873 0.62 0.814 0.904 1.009 1.103 VP 0.692 0.598 0.89 0.843 0.853 0.867 0.793 1.074 0.764 0.849 0.914 0.746 0.803 0.626 0.853 1.108 1.103 0.996 1.003 0.993 1.289 1.102 0.854 0.756 0.829 0.765 0.526 0.794 0.83 0.846 1.055 Saturated VP 0.753 0.62 0.916 0.949 0.891 1.103 1.305 1.088 0.879 0.995 1.081 0.808 0.867 0.849 0.879 1.196 1.103 1.066 1.073 1.18 1.305 1.22 1.002 0.91 0.989 0.975 0.686 0.831 0.975 1.188 1.156 RH % 91.9 96.5 97.2 88.8 95.7 78.6 60.8 98.7 86.9 85.3 84.6 92.3 92.6 73.7 97 92.6 100 93.4 93.5 84.2 98.8 90.3 85.2 83.1 83.8 78.5 76.7 95.5 85.1 71.2 91.3 Dew Point 1.7 -0.3 5.3 4.5 4.7 4.9 3.6 8 3.1 4.6 5.7 2.8 3.8 0.3 4.7 8.5 8.4 6.9 7 6.9 10.7 8.4 4.7 3 4.3 3.1 -2 3.7 4.3 4.6 7.7 Pressure 1009.9 1019.1 1019.9 1020.3 1015.2 1004.4 1014.5 1023.8 1010.2 1009.5 1008.9 1015.3 1018.3 1014.5 1008.1 1010.6 1005.9 996.7 1006.8 1012.0 1016.5 1024.2 1031.5 1034.7 1029.2 1031.7 1033.7 1029.5 1023.5 1021.2 1026.2 Days with thunder _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ hail<5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ hail>/=5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ fog _ _ _ _ _ _ _ 1 _ _ _ 1 _ _ 1 _ 1 _ _ _ _ _ _ _ _ 1 1 _ _ _