CLIMATOLOGICAL OBSERVATIONS FOR JULY 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 8 6 6 1 6 6 9 8 2 6 7 2 3 8 2 4 7 8 7 4 8 7 2 2 7 0 6 0 6 8 5 Wind Direction wsw s s s ene n n n nw sw sw sw sw nne wnw ese ese calm nnw nnw sw sw nw nw calm calm calm nne calm wnw nw Speed (knots) 9 5 8 12 9 6 11 0 5 4 9 0 0 2 9 7 10 0 17 2 7 7 2 2 0 0 0 1 0 2 7 Weather 2 3 3 3 1 1 10 1 1 3 3 0 3 61 3 3 3 61 1 1 50 2 3 1 1 0 1 0 2 2 2 Visibility 7 7 7 7 5 4 4 5 7 7 7 7 7 8 8 7 7 7 7 7 7 8 8 8 7 6 6 6 6 6 7 Screen (C) Dry Bulb 16.9 24.0 23.2 24.0 23.4 18.8 17.3 15.6 15.1 16.5 14.4 14.5 14.6 11.6 14.1 15.6 17.5 15.0 13.0 16.4 17.0 17.4 19.4 15.0 18.0 17.0 18.2 24.1 23.0 19.7 20.7 Wet Bulb 14.7 18.0 19.0 19.1 19.0 17.9 16.5 15.2 13.2 16.0 11.2 11.2 13.8 10.7 11.0 12.5 16.1 14.5 12.4 13.3 15.1 15.5 15.1 13.3 16.0 15.0 16.5 19.3 19.4 17.4 17.9 Max 24.3 26.5 26.7 29.3 28.7 24.6 18.7 19.9 19.5 19.4 18.0 19.5 19.4 18.3 18.6 18.9 20.5 16.4 16.4 20.0 19.9 22.0 23.2 21.2 25.0 26.0 26.8 28.4 29.1 25.5 24.1 Min 12.7 15.5 15.5 15.4 14.5 15.6 15.3 15.1 12.5 14.7 12.6 8.8 10.4 9.9 6.7 7.8 8.9 13.5 11.7 8.1 11.4 13.8 13.1 10.0 13.5 12.0 14.6 15.2 18.8 14.8 14.6 Ground Obs (Brixworth, 0700hrs) Grass Min 11.1 12.6 16.3 13.7 12.9 14.2 13.8 14.9 11.6 14.3 9.8 6.5 8.5 9.9 4.3 4.6 6.6 12.9 11.5 5.5 11.2 12.8 11.1 8.6 11.1 10.2 12.8 12.6 16.8 13.2 12.6 Conc. Min 13.2 16.0 17.8 15.6 15.6 16.8 15.0 15.5 13.3 15.0 12.3 9.5 10.9 11.3 8.0 9.0 10.3 13.2 11.8 8.9 11.8 13.5 13.7 11.9 14.2 13.4 15.8 15.9 19.5 16.3 15.6 Bare Earth Min 13.3 15.4 18.2 15.7 15.0 16.4 15.7 15.5 12.7 15.3 11.8 9.0 10.6 11.3 7.7 8.3 9.7 13.4 11.8 8.7 11.8 13.6 13.1 11.3 13.3 12.6 15.9 15.0 18.3 15.5 15.2 Soil Temps (Brixworth, 0700hrs) Surface 16.7 18.7 19.5 17.8 18.6 19.0 18.8 16.2 14.5 17.8 12.6 11.3 13.9 13.3 10.2 11.2 12.7 14.7 12.6 11.2 14.9 15.0 14.5 13.0 15.5 14.5 16.5 17.2 20.0 20.3 19.2 5cm 16.2 18.2 20.0 18.9 19.2 20.0 18.7 17.3 15.7 17.8 13.8 12.8 14.0 14.2 11.3 12.8 13.6 13.6 13.0 11.6 14.4 14.9 15.3 14.6 16.2 15.8 17.6 17.8 20.0 19.1 18.7 10cm 16.4 18.3 19.8 18.9 19.2 20.3 18.9 17.5 16.0 17.5 14.3 13.3 14.5 14.7 12.2 13.4 14.0 14.8 13.6 12.1 14.6 15.0 15.5 15.0 16.5 16.2 17.7 18.0 20.1 19.5 18.8 20cm 17.9 19.0 20.3 20.3 20.7 21.7 20.4 19.0 17.8 18.0 15.5 15.7 16.5 16.6 15.0 15.6 15.9 15.7 15.1 14.0 15.3 15.9 16.5 16.7 17.4 17.6 18.8 18.4 20.6 20.5 20.0 30cm 18.4 19.1 20.0 20.4 20.9 21.6 20.6 19.5 18.4 18.3 17.4 16.5 17.1 17.2 16.0 16.2 16.4 16.2 15.7 14.9 15.5 16.1 16.8 17.0 17.4 17.9 18.9 18.5 20.4 20.6 20.2 40cm 18.6 19.0 19.9 20.4 20.9 21.5 20.7 19.7 18.7 18.5 17.6 16.8 17.3 17.4 16.5 16.4 16.5 16.3 15.8 15.1 15.5 16.1 16.7 17.0 17.4 17.8 18.7 19.4 20.2 20.7 20.4 50cm 18.9 19.0 19.6 20.2 20.5 20.9 20.7 20.0 19.5 19.0 18.5 17.6 17.3 17.8 17.5 16.7 17.2 16.9 16.5 16.0 16.0 16.3 16.8 17.3 17.5 17.8 18.5 19.2 19.7 20.4 20.4 100cm 17.0 17.3 17.3 17.6 17.8 18.2 18.2 18.4 18.2 18.0 17.7 17.6 17.2 17.0 17.0 16.9 16.8 16.7 16.4 16.2 16.2 15.8 16.2 16.2 16.4 16.5 17.0 17.2 17.6 17.8 18.1 Ground (Brixworth, 0700hrs) Without snow 0 0 0 9 9 9 9 2 1 1 1 1 1 1 1 1 1 2 2 1 2 2 1 1 1 1 0 0 0 0 0 With snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Snow depth _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Ground (Pitsford, 0900hrs) Without snow 9 9 9 9 9 9 1 1 1 1 1 1 1 1 1 9 9 1 1 1 1 1 9 1 1 1 9 9 9 9 9 With snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Snow depth _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Concrete 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 Rainfall Total _ _ _ _ _ 4.0 3.9 _ 4.2 0.8 _ 1.4 5.1 6.1 _ _ 30.4 14.4 0.5 6.7 0.3 _ _ _ _ _ _ _ _ _ _ Duration _ _ _ _ _ 0.3 7.0 _ 4.5 1.5 _ 1.0 1.0 2.3 _ _ 11.5 4.3 0.8 3.0 1.5 _ _ _ _ _ _ _ _ _ _ Acidity _ _ _ _ _ 6.7 6.2 _ 6.1 5.5 _ 6.4 6.5 6.9 _ _ 6.7 6.5 _ 6.0 _ _ _ _ _ _ _ _ _ _ _ Run of Wind Miles 58.32 28.13 91.29 17.62 174.92 48.82 76.2 69 70 129.7 144.9 106.6 69.93 85.29 63.66 60.57 110.19 176.19 142.29 61.78 73.48 53.8 49.22 62.8 55.7 46.2 17.79 31.5 77.98 73.59 65.16 Mean 3.2 1.5 4.9 1 9.5 2.6 4.1 3.7 3.8 7 7.8 5.8 3.8 4.6 3.4 3.3 6 9.5 7.7 3.3 4 2.9 2.7 3.4 3 2.5 1 1.7 4.2 4 3.5 Gust 16 16 17 20 21 16 19 19 <15 n/a n/a n/a n/a 19 16 17 30 33 29 16 17 15 <15 <15 <15 <15 <15 <15 19 <15 18 Sunshine 6.5 4.0 11.0 11.5 5.0 1.9 0.0 0.6 3.3 3.4 1.0 7.0 9.0 5.5 8.7 7.7 2.6 0.0 0.6 7.5 0.3 6.9 8.7 7.0 9.5 9.5 11.2 9.4 7.2 5.7 7.2 Statistics Saturated VP(Twb) 1.674 2.065 2.199 2.212 2.199 2.052 1.878 1.728 1.518 1.819 1.331 1.331 1.579 1.287 1.313 1.45 1.831 1.652 1.441 1.528 1.717 1.762 1.717 1.528 1.819 1.706 1.878 2.24 2.254 1.988 2.052 VP 1.523 1.653 1.91 1.875 1.897 1.99 1.823 1.701 1.388 1.785 1.113 1.106 1.524 1.226 1.102 1.238 1.735 1.618 1.4 1.316 1.587 1.632 1.423 1.412 1.682 1.569 1.761 1.91 2.006 1.83 1.86 Saturated VP 1.927 2.986 2.845 2.986 2.88 2.171 1.976 1.773 1.717 1.878 1.641 1.652 1.663 1.367 1.61 1.773 2.001 1.706 1.499 1.866 1.939 1.988 2.254 1.706 2.065 1.939 2.091 3.004 2.811 2.296 2.443 RH % 79 55.4 67.1 62.8 65.9 91.7 92.3 95.9 80.8 95 67.8 66.9 91.6 89.7 68.4 69.8 86.7 94.8 93.4 70.5 81.8 82.1 63.1 82.8 81.5 80.9 84.2 63.6 71.4 79.7 76.1 Dew Point 13.2 14.5 16.8 16.5 16.7 17.4 16 15 11.8 15.7 8.5 8.4 13.3 10 8.4 10.1 15.3 14.2 12 11 13.9 14.3 12.2 12.1 14.8 13.7 15.5 16.8 17.5 16.1 16.3 Pressure 1021.6 1027.2 1019.2 1009.0 1011.8 1009.0 1005.8 1007.5 1012.5 1004.3 1002.4 1008.5 1006.3 1005.2 1013.9 1017.0 1006.1 995.9 1004.3 1014.7 1011.8 1014.6 1016.8 1017.7 1018.7 1018.7 1017.7 1021.9 1021.7 1023.0 1021.7 Days with thunder _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ hail<0.5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ hail>/=0.5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ fog _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Commercial use of this data is prohibited without the written consent of the manager, Pitsford Hall weather station Pitsford Hall Pitsford Northampton NN6 9AX