PITSFORD HALL WEATHER STATION CLIMATOLOGICAL & AGRO-METEOROLOGICAL OBSERVATIONS MAY 2001 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 3 8 8 4 1 8 5 0 8 6 0 0 1 7 7 7 8 8 8 7 7 1 1 1 6 7 8 8 6 0 4 Wind Direction ne ne nnw n nne nne nne sse e ene e e ne nne nnw ssw wsw nnw n nne nne nne ene ene e sw sw ssw sw wnw nnw Speed (knots) 16 11 8 14 9 10 12 5 13 6 9 1 3 4 0 3 12 11 8 3 3 6 4 2 3 2 2 8 9 10 16 Weather 0 2 2 _ 2 25 1 0 1 2 0 0 0 1 1 1 60 60 2 2 2 2 2 2 2 2 50 2 2 0 2 Visibility 7 6 5 0 8 7 7 7 6 6 5 6 6 5 5 5 8 7 7 7 7 8 7 7 8 5 6 7 7 7 7 Screen (C) Dry Bulb 9.0 11.7 11.6 10.0 10.4 8.0 10.2 12.7 9.6 15.0 17.4 14.8 13.0 13.1 10.8 12.7 8.6 10.5 13.3 14.6 16.6 15.5 15.2 16.0 11.6 17.5 15.0 17.6 16.8 16.5 13.9 Wet Bulb 6.8 9.0 11.5 5.4 7.1 6.0 8.4 8.9 8.2 14.5 14.2 11.8 11.4 11.9 9.7 11.9 8.1 9.0 11.4 11.9 12.4 11.5 12.9 12.5 10.0 14.8 14.2 16.1 13.8 13.4 11.1 Max 15.4 13.0 15.0 13.6 13.6 12.2 14.7 16.0 15.4 23.7 25.0 25.0 24.2 15.4 17.7 16.9 11.2 15.1 15.8 17.4 18.5 19.6 21.5 20.5 19.5 22.7 19.5 22.4 22.1 21.4 16.9 Min 4.3 5.5 4.0 1.5 1.2 2.7 2.6 1.9 4.5 8.5 8.5 8.2 8.2 11.4 8.2 8.5 7.0 6.7 7.6 10.3 7.2 6.5 7.1 8.8 8.5 11.3 13.9 14.5 10.5 8.3 7.6 Ground Obs (Brixworth, 0700hrs) Grass Min 1.4 3.6 3.1 -3.5 -3.9 _ _ 2.0 4.0 7.3 9.0 7.3 6.2 12.5 8.7 9.5 7.5 7.6 5.6 7.5 4.4 4.2 4.4 7.5 9.0 9.5 13.5 15.0 8.6 5.2 5.2 Conc. Min 3.4 5.9 6.9 0.6 0.8 2.1 1.8 2.8 5.1 8.2 9.3 9.5 9.1 12.6 9.0 10.3 8.0 7.8 8.2 10.8 8.2 7.7 8.1 10.0 10.4 11.5 14.0 16.0 10.7 10.0 9.7 Bare Earth Min 3.7 5.9 4.0 1.5 1.6 2.7 2.0 _ 4.8 7.8 9.8 8.6 8.5 12.0 8.7 10.3 7.9 7.4 7.7 10.0 7.5 7.0 7.5 9.2 10.0 12.0 14.2 14.7 10.3 9.2 8.7 Soil Temps (Brixworth, 0700hrs) Surface 9.1 14.3 11.6 14.5 17.8 10.5 13.2 5.5 7.2 9.4 11.3 10.4 11.1 13.0 10.5 10.4 9.2 9.6 10.8 11.0 11.3 8.8 10.0 11.0 12.0 14.2 15.2 16.4 15.8 12.0 12.0 5cm 9.8 11.1 11.0 9.2 8.8 9.3 9.3 6.0 7.4 9.2 11.5 10.6 11.2 13.6 10.6 11.6 9.8 9.0 10.4 11.4 11.4 10.2 11.0 12.4 12.6 14.0 15.4 16.0 13.2 13.2 13.2 10cm 10.6 11.2 11.0 10.1 10.2 10.4 10.2 7.0 7.9 9.4 11.2 11.4 11.4 13.7 10.9 11.6 10.5 9.5 10.6 11.6 11.5 10.6 11.4 12.5 13.0 14.2 15.5 15.8 13.7 13.6 13.7 20cm 11.0 11.3 11.2 10.5 10.6 11.0 10.6 8.5 9.1 9.9 11.6 12.5 12.5 14.0 12.1 12.7 12.0 11.0 11.5 12.3 12.6 12.5 13.0 14.0 14.4 15.0 16.0 16.0 15.4 15.3 15.5 30cm 11.1 11.3 11.1 10.5 11.0 11.2 11.0 9.2 9.4 10.0 11.6 12.6 13.0 14.0 12.5 13.0 12.5 11.5 11.9 12.5 13.0 13.3 13.5 14.4 14.8 15.4 16.2 16.0 16.0 15.7 16.2 40cm 10.6 11.0 10.6 10.5 10.9 11.0 10.8 9.3 9.4 10.0 11.3 12.3 12.8 13.6 12.5 12.8 12.5 11.7 11.7 12.3 12.8 13.3 13.5 14.3 14.8 15.4 16.0 15.8 16.0 16.0 16.3 50cm 10.6 11.0 10.6 10.5 11.0 11.0 11.0 9.9 10.0 10.4 11.3 12.4 12.9 13.6 13.7 13.4 13.0 12.5 12.4 12.6 13.0 13.5 13.9 14.5 15.0 15.6 16.0 16.2 16.4 16.4 16.7 100cm _ _ _ 9.0 8.9 8.8 9.0 9.8 9.9 9.8 10.5 10.3 11.0 12.0 12.0 12.0 11.6 12.0 11.8 11.8 12.2 12.2 12.4 12.6 13.2 13.6 13.6 14.2 14.5 14.6 14.6 Ground (Brixworth, 0700hrs) Without snow _ _ _ _ _ _ _ _ 1 2 1 0 0 1 2 2 2 2 1 1 0 0 0 0 0 0 2 1 0 0 0 With snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Snow depth _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Ground (Pitsford, 0900hrs) Without snow 1 1 1 1 1 1 1 0 1 1 1 0 0 1 2 2 2 2 1 1 1 1 0 1 0 9 1 9 9 9 9 With snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Snow depth _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Concrete 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 Rainfall Total _ 2.2 _ _ 0.1 _ _ _ 2.6 3 _ _ 8.1 11.1 10.1 11.4 9.6 _ _ _ _ _ _ _ _ 0.2 0.8 _ _ _ _ Duration _ 3.5 _ _ 0.3 _ _ _ 1.3 1.8 _ _ 1 6.5 3 2.5 2.5 _ _ _ _ _ _ _ _ 1.5 2.0 _ _ _ _ Acidity _ 6.7 _ _ _ _ _ _ 6.2 6.23 _ _ 6.34 6.36 6.46 6.49 6.26 _ _ _ _ _ _ _ _ _ _ _ _ _ _ Run of Wind Miles 116.5 65.61 106.55 89.86 100.71 155.72 79.46 101.14 115.1 97.42 77.2 111.16 84.72 81.23 63.91 70.78 167.6 100.26 42.12 35.38 96.89 53.8 75.55 106.55 32.26 61.98 91 125.04 86.94 115.97 147.49 Mean 6.3 3.6 5.8 4.9 5.5 8.4 4.3 5.5 6.2 5.3 4.2 6 4.6 4.4 3.5 3.8 9.1 5.4 2.3 1.9 5.2 2.9 4.1 5.8 1.7 3.4 4.9 6.8 4.7 6.3 8 Gust 31 17 28 20 27 30 21 22 20 17 23 32 20 20 16 20 52 26 <15 <15 21 18 <15 17 <15 <15 18 25 22 21 29 Sunshine 6.1 0.3 0.0 6.0 10.5 8.8 9.6 5.5 2.3 9.6 9.3 12.5 7.0 0.0 4.0 5.2 0.2 5.7 0.5 4.1 10.8 10.8 11.9 9.5 7.7 11.3 0.3 8.5 12.2 13.3 8.4 Statistics Saturated VP(Twb) 0.989 1.149 1.358 0.897 1.009 0.936 1.103 1.141 1.088 1.652 1.62 1.385 1.349 1.394 1.204 1.394 1.081 1.149 1.349 1.394 1.441 1.358 1.489 1.45 1.229 1.684 1.62 1.831 1.579 1.538 1.322 VP 0.84 0.965 1.351 0.586 0.785 0.801 0.981 0.883 0.993 1.618 1.401 1.18 1.24 1.312 1.129 1.339 1.047 1.047 1.22 1.21 1.154 1.085 1.332 1.211 1.12 1.499 1.565 1.728 1.374 1.326 1.131 Saturated VP 1.149 1.376 1.367 1.229 1.262 1.073 1.245 1.469 1.196 1.706 1.988 1.684 1.499 1.508 1.296 1.469 1.118 1.27 1.528 1.663 1.89 1.762 1.728 1.819 1.367 2.001 1.706 2.014 1.914 1.878 1.589 RH % 73.1 70.1 98.8 47.7 62.2 74.7 78.8 60.1 83 94.8 70.5 70.1 82.7 87 87.1 91.2 93.6 82.4 79.8 72.8 61.1 61.6 77.1 66.6 81.9 74.9 91.7 85.8 71.8 70.6 71.2 Dew Point 4.5 6.4 11.4 -0.6 3.5 3.8 6.7 5.2 6.9 14.2 12 9.4 10.1 11 8.7 11.3 7.6 7.6 9.9 9.8 9.1 8.2 11.2 9.8 8.6 13 13.7 15.2 11.7 11.1 8.8 Pressure 1020.0 1021.0 1009.0 1014.1 1020.8 1025.1 1027.3 1029.2 1025.1 1019.7 1021.3 1021.0 1011.8 1006.4 1004.2 997.0 996.7 1017.0 1023.4 1025.7 1027.2 1025.0 1025.7 1025.2 1023.36 1019.4 1019.8 1018.5 1020.1 1018.7 1018.5 Days with thunder _ _ _ _ _ _ _ _ _ 1 _ _ 1 _ _ _ 1 _ _ _ _ _ _ _ _ _ _ _ _ _ _ hail<0.5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ hail>/=0.5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ fog _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _