PITSFORD HALL WEATHER STATION NORTHAMPTON UNITED KINGDOM REGISTER OF CLIMATOLOGICAL OBSERVATIONS JULY 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 6 8 5 8 8 8 8 8 5 6 5 0 2 0 8 8 8 7 8 7 8 8 8 5 3 7 5 6 7 8 Wind Direction sse sw nnw n se nw ssw ssw e ssw ssw s nne calm n nnw nnw ne s nnw nnw sw ssw nnw wnw sw ssw wsw ne calm nnw Speed (knots) 9 7 10 14 7 5 10 10 8 12 6 2 6 0 3 9 7 7 6 6 10 8 6 9 3 3 1 1 3 0 3 Weather 2 2 21 3 20 1 2 61 63 2 3 3 0 5 0 51 5 20 3 2 2 2 50 3 2 2 2 2 2 2 63 Visibility 7 7 6 7 5 7 7 7 5 8 8 8 8 7 8 6 7 7 8 7 7 8 7 8 8 8 8 8 7 6 6 Screen (C) Dry Bulb 15.3 15.2 12.0 16.3 15.0 12.8 16.1 15.8 14.7 15.1 14.5 16.0 18.1 17.9 20.6 19.0 16.7 17.8 18.4 17.0 14.4 16.1 14.9 15.7 17.2 20.1 19.0 20.0 23.6 21.4 18.1 Wet Bulb 12.3 11.8 11.7 13.1 14.7 11.8 14.5 15.5 14.5 13.0 12.9 12.7 13.3 14.1 16.5 17.1 14.5 15.1 14.6 15.1 12.9 13.6 14.3 14.2 13.6 17.8 16.3 16.2 19.9 19.4 17.8 Max 15.7 18.2 17.3 19.1 17.4 19.8 21.3 20.5 20.0 20.3 18.9 20.0 20.8 24.2 25.1 23.2 22.0 21.6 24.0 21.4 19.3 20.4 21.6 19.1 22.1 28.1 23.6 26.6 30.7 24.7 20.8 Min 10.5 10.0 9.8 9.0 11.3 10.7 12.5 14.0 12.3 8.0 8.6 9.4 8.7 9.0 12.1 16.0 10.1 10.5 12.0 12.6 8.9 8.2 13.9 12.7 10.9 15.3 13.7 14.4 16.1 17.6 16.2 Ground Observations Grass Min 11.4 9.3 9.8 7.4 11.2 9.4 12.5 13.6 12.3 6.5 7.1 7.2 6.6 7.0 10.0 14.3 9.4 9.1 10.6 12.0 6.9 5.6 12.1 9.0 8.0 13.5 _ _ 11.3 15.4 16.2 Conc. Min 10.9 9.3 10.2 8.5 11.6 10.7 12.3 13.5 12.6 7.6 8.0 8.6 8.4 9.1 12.1 16.3 10.5 10.9 12.2 13.7 9.1 7.9 13.2 10.9 10.2 13.9 _ _ 11.3 16.0 16.3 Bare Earth Min 11.4 9.5 10.6 9.1 12.0 11.3 12.9 14.1 13.1 9.1 9.2 10.0 9.2 10.0 12.3 16.5 10.8 11.1 12.6 13.8 9.2 8.1 13.6 12.1 10.6 14.6 _ _ 11.8 16.3 16.6 Soil/Earth Temperatures Surface 15.8 17.3 13.7 18.5 16.8 14.5 17.3 16.2 15.7 18.7 16.1 18.2 19.3 20.8 21.7 21.0 19.7 20.0 20.3 19.4 16.4 18.7 15.0 16.5 20.5 22.5 _ _ 24.5 23.5 19.4 5cm 16.2 15.2 13.9 15.4 15.3 14.6 15.8 16.1 15.5 15.5 14.8 15.7 15.9 16.0 18.5 19.5 18.3 17.7 18.8 18.7 17.6 16.6 16.2 16.4 17.4 19.4 19.8 17.9 20.9 21.4 19.2 10cm 16.5 15.4 14.5 15.2 15.6 15.0 16.0 16.4 16.0 15.3 15.0 15.4 15.8 16.0 18.4 19.8 18.4 18.0 18.7 18.5 17.2 16.7 17.2 16.6 17.4 19.4 21.0 18.9 19.8 21.6 19.7 20cm 16.3 14.9 14.8 14.6 15.6 15.5 15.9 16.2 16.1 15.2 15.4 15.3 15.5 16.0 17.7 19.4 18.4 18.1 18.1 18.9 17.9 16.7 17.5 17.0 17.1 18.6 20.2 19.2 20.0 21.8 19.5 30cm 16.3 15.3 15.1 15.3 15.8 16.0 16.4 16.6 16.5 16.1 16.1 16.0 16.1 16.6 17.7 18.9 18.5 18.4 18.3 18.7 18.3 17.5 17.7 17.5 17.2 18.5 18.5 17.9 19.5 20.5 19.3 40cm 16.1 15.4 15.1 15.3 15.7 16.0 16.1 16.5 16.4 16.0 16.0 16.0 16.0 16.4 17.4 18.5 18.4 18.1 18.0 18.6 18.0 17.3 17.6 17.5 17.2 17.8 17.8 18.4 19.5 20.2 19.3 50cm 16.0 15.6 15.4 15.9 15.8 16.0 16.4 16.5 16.5 16.5 16.5 16.2 16.4 16.6 17.5 18.3 18.4 18.1 18.1 18.5 18.4 17.9 17.8 17.5 17.2 18.4 16.2 18.0 19.4 20.0 19.3 100cm 15.2 15.1 15.1 15.1 15.0 15.2 15.1 15.1 15.2 15.3 15.3 15.4 15.3 15.4 15.5 15.7 16.0 16.2 16.4 16.4 16.5 16.6 16.5 16.2 16.2 16.2 16.4 16.8 17.0 17.2 17.1 State of the Ground Without snow 1 0 2 1 1 1 1 1 1 1 1 1 1 1 0 0 9 9 9 1 9 9 9 1 0 0 0 0 0 0 1 With snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Snow depth _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ State of the Grass 3 0 3 1 3 3 0 3 3 2 0 0 0 1 0 3 1 3 0 3 1 0 3 1 0 0 0 0 0 1 3 State of the Concrete 1 0 2 0 2 1 0 2 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 2 Evaporation Hook-gauge reading 58.64 _ _ _ _ _ _ _ 51.81 _ _ _ 70.34 _ _ _ _ _ _ _ _ 70.96 _ _ _ _ _ _ _ _ 69.25 Total evaporation (less rainfall) > > > > > > > > 16.86 > > > 5.17 > > > > > > > > 36.92 > > > > > > > > 29.81 Rainfall Total 2.4 5.7 2.7 4.9 4.0 _ 2.2 12.3 20.4 1.3 2.0 _ _ _ _ _ _ _ 1.6 _ _ tr 0.2 _ _ _ _ _ 0.1 26.7 1.1 Duration 0.5 10.3 1.8 4.5 1.0 _ 1.3 11.1 3.3 0.5 1.3 _ _ _ _ _ _ _ 0.5 _ _ _ 0.2 _ _ _ _ _ 0.1 4.5 1.0 Acidity 6.55 6.26 6.37 6.22 5.91 _ 6.28 6.32 6.39 6.35 6.22 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Run of Wind Miles 153.37 129.9 130.25 100.66 75.8 78.34 204.58 109.15 98.25 89.26 89.49 66.04 47.07 51.19 74.01 105.85 99.26 67.57 82.92 108.26 84.26 87.2 148.61 87.41 98.39 81.9 89.69 53.97 59.28 62.93 70.09 Mean 8.3 7 7.1 5.5 4.1 4.2 11.1 5.9 5.3 4.8 4.8 3.6 2.5 2.8 4 5.7 5.4 3.7 4.5 5.9 4.6 4.7 8 4.7 5.3 4.4 4.9 2.9 3.2 3.4 3.8 Gust 25 23 27 27 23 <15 22 21 18 17 17 <15 16 <15 15 17 20 16 <15 21 21 20 26 24 21 16 <15 <15 17 16 <15 Sunshine 5.2 0.8 5.7 2.5 0.4 2.8 4.9 1.7 1.3 8.3 7.8 6.1 12.2 10.8 10.0 6.0 5.1 4.4 9.6 4.9 3.9 0.2 0.1 1.3 6.7 11.8 4.2 6.1 4.4 0.2 2.5 Statistics Saturated VP(Twb) 1.431 1.385 1.376 1.508 1.674 1.385 1.652 1.762 1.652 1.499 1.489 1.469 1.528 1.61 1.878 1.951 1.652 1.717 1.663 1.717 1.489 1.558 1.631 1.62 1.558 2.039 1.854 1.843 2.325 2.254 2.039 VP 1.226 1.153 1.356 1.289 1.653 1.317 1.543 1.741 1.638 1.356 1.38 1.244 1.2 1.35 1.597 1.821 1.502 1.532 1.403 1.587 1.387 1.387 1.59 1.517 1.312 1.881 1.669 1.583 2.07 2.116 2.018 Saturated VP 1.739 1.728 1.403 1.854 1.706 1.479 1.831 1.796 1.674 1.717 1.652 1.819 2.078 2.052 2.428 2.199 1.902 2.039 2.118 1.939 1.641 1.831 1.695 1.785 1.963 2.354 2.199 2.34 2.915 2.55 2.078 RH % 70.5 66.7 96.7 69.5 96.9 89 84.3 96.9 97.8 79 83.5 68.4 57.7 65.8 65.8 82.8 79 75.1 66.2 81.8 84.5 75.8 93.8 85 66.8 79.9 75.9 67.6 71 83 97.1 Dew Point 10 9.1 11.5 10.7 14.5 11 13.4 15.3 14.4 11.5 11.7 10.2 9.6 11.4 14 16 13 13.3 12 13.9 11.8 11.8 13.9 13.2 11 16.5 14.7 13.8 18 18.4 17.6 Pressure 999.3 998.4 996.5 1015.7 1007.5 1014.9 1013.9 1005.2 1001.5 1007.6 1013.3 1019.3 1020.4 1026.9 1026.0 1021.5 1020.8 1021.3 1019.8 1014.0 1016.8 1019.3 1011.2 1016.1 1015.4 1015.1 1016.6 1017.6 1018.3 1012.0 1006.8 Days with thunder _ _ _ _ _ _ _ _ 1 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 1 _ hail<5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ hail>/=5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ fog _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _