CLIMATOLOGICAL OBSERVATIONS AUGUST 2001 PITSFORD HALL WEATHER STATION 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 unless indicated Total Cloud 1 8 7 3 7 8 8 7 8 4 8 8 8 8 3 7 3 7 8 5 2 8 8 9 0 8 0 3 5 8 7 Wind Direction sse ene w w nw s sse wsw ene nnw s s sw sse s nnw sse e se wnw s calm calm calm ene nnw nnw sse se calm nnw Speed (knots) 8 7 4 7 4 11 6 14 6 10 8 6 8 6 1 15 2 8 2 12 7 0 0 0 1 8 12 6 1 0 8 Weather 1 50 3 1 3 62 50 3 2 3 20 61 2 10 1 21 2 3 2 2 2 2 2 45 5 10 0 2 2 51 3 Visibility 8 5 6 8 8 6 7 8 7 8 7 5 7 5 7 8 7 7 7 8 7 7 6 3 5 5 8 7 7 5 7 Screen (C) Dry Bulb 19.0 16.3 18.0 17.2 15.1 16.1 16.2 16.9 15.1 15.8 15.1 15.8 19.3 17.6 24.5 15.4 16.0 19.0 18.1 18.4 16.9 19.1 18.6 19.5 20.1 17.1 17.5 16.9 16.6 15.5 14.9 Wet Bulb 15.0 15.0 16.2 14.2 13.9 15.9 14.8 14.3 13.6 13.2 14.0 15.6 17.9 16.9 20.1 14.6 14.1 16.8 17.0 15.6 14.1 17.3 17.0 18.5 18.2 16.1 13.0 14.3 13.2 14.1 13.4 Max 25.6 19.9 22.9 21.6 22.0 22.5 22.0 18.6 16.7 19.4 19.1 19.4 24.1 25.9 30.1 22.0 23.0 23.6 23.3 21.8 24.2 24.4 24.4 26.7 25.9 20.6 21.3 22.3 22.9 17.4 20.0 Min 10.6 10.3 13.6 10.5 10.8 13.9 12.0 12.9 11.5 8.5 9.3 14.6 15.4 16.3 17.3 15.2 10.5 13.6 14.9 12.2 10.1 14.9 14.9 16.9 13.0 16.0 9.6 8.1 9.4 13.4 10.0 Ground Obs (Brixworth, 0700hrs) Grass Min 9.1 8.6 12.6 8.2 8.8 11.2 10.0 10.3 10.8 7.2 8.2 14.8 14.7 14.4 15.5 15.3 9.4 12.3 14.7 11.1 8.7 11.4 13.1 14.9 11.0 14.3 7.3 6.2 6.4 11.9 7.3 Conc. Min 12.6 12.5 14.1 11.6 11.7 14.3 12.7 12.9 12.0 9.3 10.7 14.9 15.4 16.0 17.7 15.8 11.4 14.6 15.3 13.0 11.5 12.7 15.5 16.7 14.2 16.5 10.7 10.6 11.1 14.3 10.9 Bare Earth Min 12.7 12.6 14.4 11.4 11.8 13.9 12.8 12.5 12.2 9.3 10.3 15.1 15.5 16.0 16.7 15.9 11.1 14.7 15.3 12.7 11.0 10.5 15.3 16.5 13.8 15.8 9.8 9.4 10.1 13.2 10.4 Soil Temps (Brixworth, 0700hrs) Surface 17.2 17.4 17.6 15.3 13.4 15.4 14.5 13.8 13.5 10.8 13.0 16.0 16.7 17.0 17.5 16.7 12.5 14.4 16.4 14.2 13.0 16.3 16.5 17.5 15.4 17.4 12.0 11.6 12.2 14.8 13.2 5cm 16.6 17.0 17.0 14.8 14.4 16.0 15.0 14.4 14.2 11.8 13.2 15.7 16.2 16.0 17.3 17.6 14.2 15.5 16.5 15.0 14.0 16.2 16.6 17.5 16.4 17.7 14.0 13.1 13.5 15.3 13.6 10cm 17.0 17.5 17.4 15.5 15.1 16.2 15.5 14.8 14.5 12.5 13.5 15.7 16.2 16.8 17.3 17.7 14.6 15.5 16.7 15.4 14.4 16.2 16.7 17.5 16.6 17.7 14.6 13.5 13.8 15.4 14.0 20cm 18.9 19.0 18.4 17.3 16.8 17.4 17.2 16.5 16.0 14.9 15.0 16.1 16.4 17.4 17.8 18.5 16.5 16.4 17.5 17.0 16.3 17.1 17.7 18.2 18.0 18.5 17.2 15.8 15.8 16.6 15.8 30cm 19.5 19.6 18.9 18.0 17.4 17.7 17.5 17.0 16.6 15.8 15.7 16.4 16.6 17.4 18.0 18.6 17.5 17.4 17.6 17.5 16.9 17.3 17.9 18.3 18.5 18.7 17.8 16.7 16.7 18.0 16.5 40cm 19.8 19.8 19.1 18.3 17.6 17.8 17.7 17.3 16.7 16.1 15.9 16.4 16.6 17.4 18.0 18.5 17.6 17.5 17.6 17.5 17.2 17.4 18.0 18.3 18.6 18.7 18.0 17.1 17.0 18.3 16.8 50cm 20.2 20.2 19.6 19.1 18.5 18.4 18.4 18.0 17.5 17.0 16.6 16.7 16.9 17.5 18.0 18.5 18.0 17.8 18.0 18.0 17.8 17.7 18.3 18.5 18.8 19.0 18.7 18.1 17.8 17.7 17.5 100cm 18.3 18.3 18.4 18.1 18.2 18.0 17.8 17.6 17.4 17.2 16.8 16.7 16.8 16.8 16.9 17.1 17.3 17.3 17.4 17.4 17.5 17.5 17.4 17.7 17.8 17.8 17.8 17.8 17.7 17.6 17.5 Ground (Brixworth, 0700hrs) Without snow 0 0 1 0 1 2 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 0 0 2 0 0 0 0 0 0 0 With snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Snow depth _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Ground (Pitsford, 0900hrs) Without snow 9 9 9 1 1 1 1 1 1 1 1 1 1 1 9 1 9 9 1 1 9 9 9 9 9 1 9 9 9 9 9 With snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Snow depth _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Concrete 0 0 0 0 0 1 0 0 0 0 0 2 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Rainfall Total _ 1.3 4.0 2.1 1.2 5.5 6.1 13.1 7.9 0.1 4.2 4.7 0.1 _ 0.2 tr _ 3.1 1.6 _ _ _ 0.4 _ 3.7 0.1 _ _ _ 1.3 0.2 Duration _ 3.0 0.8 2.0 3.3 1.4 0.3 4.5 2.8 0.1 1.8 2.0 _ _ 0.3 0.1 _ 2.3 0.5 _ _ _ 2.4 _ 0.1 0.3 _ _ _ 0.5 0.3 Acidity _ 6.44 6.46 6.48 _ 6.58 6.40 6.60 6.47 _ 6.37 6.38 _ _ _ _ _ 6.44 6.50 _ _ _ _ _ 6.50 _ _ _ _ _ _ Run of Wind Miles 43.59 42.37 61.35 54.2 57.53 79.88 90.64 61.85 79.74 71.14 88.05 88.48 77.21 38.33 62.27 76.37 49.43 50.73 61.12 44.25 53.22 17.12 14.8 28.63 60.97 85.01 47.46 17.48 36.34 61.17 116.44 Mean 2.4 2.3 3.3 2.9 3.1 4.3 4.9 3.4 4.3 3.9 4.8 4.8 4.2 2.1 3.4 4.1 2.7 2.7 3.3 2.4 2.9 0.9 0.8 1.6 3.3 4.6 2.6 0.9 2 3.3 6.3 Gust <15 <15 18 17 16 20 22 25 23 22 20 19 22 <15 22 21 <15 <15 17 17 17 <15 <15 <15 <15 17 18 <15 <15 <15 27 Sunshine 11.8 0.0 4.0 6.6 10.4 3.2 3.2 8.5 0.0 11.1 0.8 0.0 6.1 8.2 10.0 7.2 9.9 3.4 6.3 10.2 9.3 3.4 1.6 7.2 7.7 1.9 11.9 10.6 10.6 0.5 5.1 Statistics Saturated VP(Twb) 1.706 1.706 1.843 1.62 1.589 1.808 1.684 1.631 1.558 1.518 1.599 1.773 2.052 1.927 2.354 1.663 1.61 1.914 1.939 1.773 1.61 1.976 1.939 2.131 2.091 1.831 1.499 1.631 1.518 1.61 1.538 VP 1.432 1.617 1.72 1.415 1.507 1.794 1.588 1.453 1.456 1.34 1.524 1.759 1.956 1.879 2.051 1.608 1.48 1.763 1.864 1.581 1.419 1.853 1.829 2.062 1.961 1.762 1.192 1.453 1.286 1.514 1.436 Saturated VP 2.199 1.854 2.065 1.963 1.717 1.831 1.843 1.927 1.717 1.796 1.717 1.796 2.24 2.014 3.077 1.751 1.819 2.199 2.078 2.118 1.927 2.212 2.144 2.268 2.354 1.951 2.001 1.927 1.89 1.762 1.695 RH % 65.1 87.2 83.3 72.1 87.8 98 86.2 75.4 84.8 74.6 88.8 97.9 87.3 93.3 66.7 91.8 81.4 80.2 89.7 74.6 73.6 83.8 85.3 90.9 83.3 90.3 59.6 75.4 68 85.9 84.7 Dew Point 12.3 14.2 15.1 12.1 13.1 15.8 13.9 12.5 12.6 11.3 13.3 15.5 17.1 16.5 17.9 14.1 12.8 15.5 16.4 13.8 12.2 16.3 16.1 18 17.2 15.5 9.6 12.5 10.7 13.2 12.4 Pressure 1026.0 1014.7 1008.3 1013.4 1013.8 1007.4 1006.3 1000.3 1009.5 1022.5 1024.2 1016.5 1011.8 1013.1 1009.8 1010.5 1016.7 1012.8 1001.6 1012.0 1016.6 1020.9 1019.2 1016.3 1015.7 1017.5 1023.1 1022.7 1017.4 1011.7 1009.8 Days with thunder _ _ _ _ _ _ _ 1 1 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 1 _ _ _ _ _ _ hail<0.5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 1 _ _ _ _ _ _ hail>/=0.5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ fog _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Evaporation Hook-gauge reading _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 60.68 58.36 54.82 52.8 51.4 48.17 50.18 48.2 66.84 64.24 60.84 61.58 Total evaporation (less rainfall) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 2.32 3.54 2.02 1.80 3.23 1.69 2.08 3.61 2.60 3.40 0.56