PITSFORD HALL WEATHER STATION, NORTHAMPTON, UNITED KINGDOM CLIMATOLOGICAL OBSERVATIONS - FEBRUARY 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 0900 hours UTC Total Cloud 8 8 7 8 5 7 8 8 6 1 8 3 5 0 8 9 8 2 8 3 8 3 3 8 8 5 3 5 Wind Direction ssw ssw ssw s sw nnw ssw s s wnw ssw ssw wnw ne nnw sse s ssw nw w nnw ssw wnw w sw wsw sw ssw Speed (knots) 18 24 23 8 12 9 12 9 10 11 16 14 3 15 9 2 3 2 10 15 2 10 17 9 8 20 6 6 Weather 2 61 21 3 1 3 2 1 2 2 60 2 2 0 3 45 10 3 3 2 2 2 1 2 2 2 1 1 Visibility 6 6 7 7 6 7 6 7 7 8 8 7 7 7 7 2 5 7 5 7 5 7 8 7 6 7 8 7 Screen (C) Dry Bulb 10.6 11.3 9.8 4.4 8.8 6.1 3.2 7.9 8.4 6.1 11.6 9.4 4.9 3.7 0.5 1.0 2.4 3.7 7.2 7.1 0.5 11.5 4.0 2.9 8.9 9.4 4.0 3.2 Wet Bulb 10.1 10.7 8.7 4.0 7.9 4.8 2.6 7.4 7.0 4.9 11.2 8.1 4.5 2.6 0.1 1.0 2.4 3.2 7.0 5.0 0.1 9.5 2.7 2.1 8.6 6.8 2.8 2.8 Max 12.5 11.9 10.3 12.2 11.9 8.0 10.6 12.4 10.5 11.5 14.0 12.2 8.7 7.5 8.6 7.1 9.5 9.8 10.6 9.0 11.5 12.0 7.1 9.4 11.2 11.6 7.5 9.9 Min 4.0 10.4 8.0 2.3 4.0 4.3 0.6 2.8 7.6 5.0 5.8 7.5 3.6 1.0 -2.0 0.1 -0.6 1.9 3.5 6.2 -1.0 1.0 1.6 0.0 2.8 8.3 1.4 0.5 Ground Observations Grass Min 2.1 9.5 5.6 0.2 0.2 1.7 -2.0 2.4 5.9 1.5 3.9 3.9 0.1 -1.7 -4.8 -1.6 -0.4 -2.0 1.0 2.0 -2.0 0.5 -0.5 -2.1 1.8 6.4 -0.8 3.5 Conc. Min 2.7 8.6 6.1 -1.1 1.1 1.9 -1.6 1.6 5.6 2.2 3.1 4.5 1.7 -1.2 -3.6 -0.9 0.1 -1.0 1.5 3.0 -2.0 0.0 0.5 -1.4 1.5 6.1 -0.4 3.9 Bare Earth Min 3.5 9.6 6.6 2.0 n/a 3.1 -0.3 2.1 6.1 3.0 3.5 5.5 3.1 0.1 -1.9 0.3 1.0 0.6 2.5 4.0 -1.0 1.5 1.2 -0.2 1.8 6.4 0.3 7.5 Soil/Earth Temperatures Surface 7.0 10.4 8.4 4.5 7.6 5.5 3.2 6.5 7.1 4.5 10.4 7.9 5.0 2.8 1.8 3.0 3.4 3.9 6.5 5.4 2.5 9.0 3.1 2.7 6.8 7.5 2.4 2.6 5cm 7.2 9.3 7.7 4.1 7.4 4.9 2.8 5.6 7.3 4.4 9.0 6.8 5.3 2.7 1.4 3.0 3.3 3.6 5.8 5.4 2.0 6.9 3.2 2.0 6.5 7.2 2.6 2.4 10cm 6.9 9.2 8.1 5.4 7.9 5.6 3.6 6.0 7.7 5.3 8.7 7.4 6.1 3.9 2.6 3.9 3.9 4.4 6.0 6.2 3.0 6.8 4.0 2.8 6.3 10.8 3.9 3.2 20cm 6.8 8.4 8.3 6.8 7.8 6.4 5.1 6.2 7.7 6.5 7.9 7.9 7.2 5.6 4.4 5.0 5.0 5.2 6.2 6.8 3.9 6.2 5.3 4.2 5.9 7.6 5.7 4.8 30cm 6.4 7.6 8.1 7.1 7.5 6.5 5.5 6.0 7.2 6.6 7.3 7.9 7.5 6.4 5.2 5.4 5.3 5.1 5.5 7.0 4.9 5.0 5.6 4.8 5.7 7.2 6.1 5.1 40cm 6.3 7.4 7.9 6.8 7.0 6.5 5.6 6.0 7.0 6.6 7.1 7.6 7.4 6.4 5.4 5.4 5.3 5.6 5.5 6.2 5.0 5.5 5.7 5.0 5.8 6.8 6.0 4.9 50cm 6.3 7.4 7.9 7.0 7.0 6.7 5.8 6.2 7.1 6.9 7.1 7.8 7.6 6.9 6.1 6.0 5.6 5.8 6.0 6.5 5.5 5.5 6.2 5.6 5.4 6.9 6.5 5.6 100cm 6.5 6.7 6.7 6.9 6.9 6.8 6.7 6.7 6.7 6.7 6.8 6.8 6.5 6.9 6.8 6.7 6.4 6.4 6.5 6.5 6.5 6.3 6.4 6.3 6.4 6.2 6.2 6.2 State of the Ground Without snow 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4 1 1 1 1 1 1 1 1 1 1 1 1 1 With snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Snow depth _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ State of the Grass 1 3 3 3 3 3 1 3 3 1 3 1 1 7 7 4 4 4 3 3 5 3 4 4 3 3 3 3 State of the Concrete 1 2 2 0 1 1 0 1 1 0 2 0 0 0 0 1 0 1 1 0 0 0 1 0 2 1 1 1 Evaporation Hook-gauge reading 74.2 _ _ _ _ _ _ _ 48.92 _ _ _ _ _ 50.14 _ _ _ _ _ _ _ 62.74 _ _ _ _ 73.72 Total evaporation (less rainfall) > > > > > > > > 7.21 > > > > > 6.38 > > > > > > > 4.50 > > > > 5.82 Rainfall Total 1.5 1.7 0.8 4.9 1.7 0.2 2.4 1.8 0.4 2.7 1.4 0.3 2.8 tr(x) _ _ _ 0.6 12.0 1.5 2.6 0.4 1.3 6.7 7.5 1.0 0.3 tr Duration 1.0 1.3 0.3 2.3 1.2 _ 2.0 1.3 0.8 2.8 0.6 0.3 1.8 _ _ _ _ 0.1 9.3 1.6 2.5 0.1 0.4 10.0 8.3 0.3 0.1 0.1 Acidity _ _ _ 6.43 _ _ 6.44 _ _ 6.44 6.49 _ 6.22 _ _ _ _ _ 6.95 6.39 6.64 _ _ 6.37 6.41 6.55 _ _ Run of Wind Miles 490.73 257.25 166.34 276.96 205.4 169.76 179.69 207.31 160.46 236.33 171.07 89.8 130.17 70.14 43.23 45.36 57.23 259.85 190.51 238.15 193.94 261.34 190.23 127.8 271.89 186.07 207.46 102.6 Mean 26.6 13.9 9 15 11.1 9.2 9.7 11.2 8.7 12.8 9.3 4.9 7.1 3.8 2.3 2.5 3.1 14.1 10.3 12.9 10.5 14.2 10.3 6.9 14.7 10.1 11.2 5.6 Gust 50 39 27 47 32 39 29 33 39 32 29 23 38 19 16 <15 16 30 42 51 40 51 49 19 59 48 32 24 Sunshine 0.0 0.0 0.0 0.0 4.4 1.0 0.0 0.0 2.2 3.5 0.6 2.4 1.9 6.2 4.1 1.4 2.7 8.0 1.9 5.5 0.4 6.4 6.8 0.0 0.2 6.5 5.7 7.8 Statistics Saturated VP(Twb) 1.237 1.287 1.126 0.814 1.066 0.861 0.737 1.03 1.002 0.867 1.331 1.081 0.843 0.737 0.615 0.657 0.726 0.769 1.002 0.873 0.615 1.188 0.742 0.711 1.118 0.989 0.747 0.747 VP 1.203 1.246 1.051 0.787 1.005 0.773 0.697 0.996 0.907 0.786 1.304 0.993 0.816 0.663 0.588 0.657 0.726 0.735 0.988 0.731 0.588 1.052 0.654 0.657 1.098 0.813 0.666 0.72 Saturated VP 1.279 1.34 1.212 0.837 1.133 0.942 0.769 1.066 1.103 0.942 1.367 1.18 0.867 0.797 0.634 0.657 0.726 0.797 1.016 1.009 0.634 1.358 0.814 0.753 1.141 1.18 0.814 0.769 RH % 94.1 93 86.7 94 88.7 82.1 90.6 93.4 82.2 83.4 95.4 84.2 94.1 83.2 92.7 100 100 92.2 97.2 72.4 92.7 77.5 80.3 87.3 96.2 68.9 81.8 93.6 Dew Point 9.7 10.2 7.7 3.5 7 3.3 1.8 6.9 5.6 3.5 10.9 6.9 4 1.1 -0.5 1 2.4 2.6 6.8 2.5 -0.5 7.7 0.9 1 8.3 4 1.2 2.3 Pressure 1014.4 1006.7 1002.8 1009.3 1005.0 1001.9 1016.6 1016.5 1003.6 1008.6 998.7 1007.8 1016.1 1032.1 1035.2 1034.0 1024.9 1022.1 1018.3 998.2 1020.6 996.8 999.8 1011.9 999.3 983.5 995.1 995.0 Days with thunder _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ hail<5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 1 _ _ 1 _ _ hail>/=5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 1 _ _ _ 1 1 fog _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 1 _ _ _ _ _ _ _ _ _ _ _ _