PITSFORD HALL WEATHER STATION, NORTHAMPTON, UNITED KINGDOM CLIMATOLOGICAL OBSERVATIONS - SEPTEMBER 2003 Observations at Pitsford Hall 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 Hour of observations 07:00 09:00 09:00 09:00 09:00 09:00 09:00 09:00 09:00 09:00 09:00 09:00 09:00 09:00 09:00 09:00 09:00 09:00 09:00 07:00 08:00 09:00 09:00 09:00 09:00 09:00 08:00 09:00 09:00 09:00 Total Cloud (oktas) 2 4 8 0 8 8 4 2 2 4 6 2 5 6 5 4 3 8 5 0 6 8 3 1 2 7 3 8 1 8 Wind Direction n nw ene ssw e nw s ssw nne nne ssw nnw s ssw ssw nnw s nnw nw s sse ssw nnw w se ssw nne n ssw se Speed (knots) 4 3 1 2 1 1 1 6 6 3 3 6 6 3 1 1 2 3 6 3 3 7 9 2 1 1 3 7 3 2 Weather 2 2 2 5 2 3 2 2 2 1 3 1 2 2 2 2 2 3 1 10 2 2 2 1 1 3 2 60 2 2 Visibility 8 6 7 7 5 6 8 9 8 7 6 8 _ _ 6 8 7 6 7 6 6 8 9 9 8 8 7 7 8 7 Screen (C) Dry Bulb 11.1 13.0 16.9 18.8 16.2 17.1 13.0 16.5 16.0 17.2 15.0 14.3 12.0 13.5 18.0 17.4 18.3 17.0 20.5 13.1 12.7 19.5 10.0 11.0 11.9 13.5 10.0 11.0 12.1 13.0 Wet Bulb 9.6 11.3 14.6 14.2 15.0 14.5 10.9 13.2 12.9 16.3 13.9 12.7 10.2 12.2 13.0 13.9 14.1 14.4 16.0 12.4 11.4 16.7 8.1 8.6 9.0 11.2 9.0 10.1 9.5 11.5 Max 18.0 21.6 20.3 24.7 24.7 22.2 19.7 21.5 20.8 19.0 17.0 19.2 23.9 26.0 25.0 26.8 27.5 20.4 23.1 25.0 24.3 21.8 15.4 17.6 18.8 19.5 17.0 17.1 18.5 20.2 Min 10.0 10.5 11.4 8.9 10.3 12.7 6.7 7.6 9.0 10.9 6.7 8.7 9.1 9.5 9.6 9.7 9.8 11.3 14.5 11.1 9.6 12.6 6.3 3.9 4.4 6.6 6.1 8.0 4.5 8.5 Ground Observations (C) Grass Min 8.1 7.2 12.4 5.4 6.2 9.3 3.1 4.2 6.8 10.7 5.0 10.5 4.8 5.6 5.5 6.0 5.5 7.1 11.0 7.6 7.1 11.9 2.8 0.4 0.6 3.1 2.0 3.7 0.8 5.1 Conc. Min 11.1 11.5 14.3 9.0 10.5 13.1 7.5 8.0 9.6 11.8 6.9 8.0 9.3 10.0 9.6 9.5 9.3 10.9 13.7 10.7 10.4 12.9 5.7 4.4 4.6 6.8 5.4 8.0 4.0 8.8 Bare Earth Min 11.0 10.8 13.6 7.6 8.6 12.0 6.5 7.5 8.7 11.5 7.2 9.0 8.6 9.0 9.0 9.0 7.8 9.3 12.9 10.3 9.6 12.5 5.0 3.5 3.5 5.6 4.4 7.1 6.0 7.6 Soil/Earth Temperatures (C) Surface 12.0 15.5 19.8 17.7 19.5 19.4 14.0 16.2 16.0 15.9 15.8 15.0 12.5 13.9 16.0 15.6 15.3 17.4 19.0 18.4 14.6 19.5 10.0 9.1 9.6 13.1 9.5 11.9 9.6 14.1 5cm 15.3 15.4 16.9 15.3 16.5 17.1 14.7 15.0 15.5 15.7 13.3 14.0 13.4 13.7 14.4 14.4 14.3 15.2 16.0 15.0 14.9 16.5 11.8 10.3 10.0 10.9 10.5 11.4 9.7 11.7 10cm 15.9 16.0 16.3 16.0 17.1 17.6 15.4 15.6 16.0 16.2 15.9 14.4 14.1 14.4 15.0 14.8 14.8 15.6 16.4 15.7 15.6 16.7 12.3 10.8 10.5 10.3 11.1 11.7 10.4 12.1 20cm 16.8 16.5 17.4 16.8 17.3 17.7 16.8 16.3 16.5 16.2 15.4 15.4 15.1 15.5 15.7 15.7 15.7 16.1 16.4 16.4 16.5 16.8 14.3 12.8 12.4 12.6 12.6 12.7 12.0 12.6 30cm 17.0 16.8 17.5 17.2 17.4 17.8 17.2 16.7 16.8 16.5 15.9 15.8 15.6 16.0 16.1 16.1 16.2 16.5 16.5 16.7 16.8 17.0 15.2 13.9 13.5 13.5 12.9 13.5 12.8 13.6 40cm 17.0 16.8 17.3 17.3 17.3 17.6 17.1 16.7 16.8 16.6 15.9 16.0 15.6 16.0 16.2 16.2 16.3 16.3 16.6 16.6 16.6 16.8 15.3 14.0 13,6 13.4 13.4 13.4 13.0 13.6 50cm 17.5 17.0 17.7 17.7 17.7 17.9 17.6 17.2 17.2 17.0 16.6 16.4 16.5 16.5 16.5 16.6 16.6 16.6 16.7 16.9 16.9 16.9 16.2 15.1 14.5 14.4 14.1 14.0 14.1 13.6 100cm 17.3 17.5 17.0 16.9 16.9 16.9 16.8 16.8 16.5 16.5 16.4 16.3 16.1 16.0 16.0 16.0 16.0 15.9 16.0 16.0 16.0 15.9 15.9 15.5 15.3 15.0 14.8 14.6 14.3 14.3 State of the Ground Without snow 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 0 0 0 0 1 1 0 0 1 0 0 0 With snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Snow depth _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ State of the Grass 0 0 0 0 0 0 1 1 1 3 3 3 1 1 1 1 1 3 1 1 1 0 3 1 0 0 1 1 1 0 State of the Concrete 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 Evaporation (mm) Hook-gauge reading 54.71 _ _ _ _ 56.78 _ _ _ _ _ _ _ _ 60.14 _ _ _ _ 67.46 _ _ _ _ _ _ 61.92 _ _ 55.95 Total evaporation (less rainfall)> > > > > 8.80 > > > > > > > > 13.40 > > > > 17.89 > > > > > > 15.94 > > 6.04 Rainfall (mm) Total _ _ _ _ _ _ _ _ 6.4 0.8 1.3 _ _ _ _ _ tr _ _ _ _ 10.3 _ _ _ 0.1 _ 0.1 _ _ Duration (hrs) _ _ _ _ _ _ _ _ 7.1 0.2 0.3 _ _ _ _ _ _ _ _ _ _ 2.8 _ _ _ 1.8 _ 0.1 _ _ Intensity (mean over 24 hrs, mm/hr) _ _ _ _ _ _ _ _ 0.9 4.0 4.3 _ _ _ _ _ _ _ _ _ _ 3.7 _ _ _ 0.1 _ 1.0 _ _ Run of Wind Miles (over 24 hrs) 65.8 71.61 17.72 50 52.27 71.53 36.37 169.73 72.04 62.23 95.61 60 57.6 53.53 53.12 53.29 122.97 137.94 84.8 68.21 156.4 153.83 96.03 37.25 55.19 73.96 63.46 77.99 89.68 90.57 Mean (mph) 3.6 3.9 1 2.7 2.8 3.9 2 9.2 3.9 3.4 5.2 3.3 3.1 2.9 2.9 2.9 6.7 7.5 4.6 3.7 8.5 8.3 5.2 2 3 4 3.4 4.2 4.9 4.9 Gust (mph) 18 <15 <15 <15 <15 25 <15 22 21 23 24 18 <15 <15 <15 <15 17 17 16 21 20 36 25 <15 <15 20 <15 19 18 20 Sunshine (hrs) 4.6 9.0 2.0 10.9 1.0 7.5 5.8 6.1 4.1 1.1 0.1 5.7 10.6 11.4 8.0 9.8 7.0 3.6 6.7 7.6 6.5 1.9 8.8 8.1 7.7 1.1 7.6 4.6 5.0 2.5 Statistics Saturated VP(Twb) 1.196 1.34 1.663 1.62 1.706 1.652 1.305 1.518 1.489 1.854 1.589 1.469 1.245 1.422 1.499 1.589 1.61 1.641 1.819 1.441 1.349 1.902 1.081 1.118 1.149 1.331 1.149 1.237 1.188 1.358 VP 1.094 1.224 1.506 1.305 1.624 1.474 1.162 1.293 1.277 1.792 1.514 1.36 1.122 1.333 1.158 1.35 1.323 1.463 1.511 1.393 1.26 1.71 0.952 0.955 0.952 1.174 1.081 1.176 1.011 1.256 Saturated VP 1.322 1.499 1.927 2.171 1.843 1.951 1.499 1.878 1.819 1.963 1.706 1.631 1.403 1.548 2.065 1.988 2.104 1.939 2.413 1.508 1.469 2.268 1.229 1.313 1.394 1.548 1.229 1.313 1.413 1.499 RH % 82.8 81.7 78.2 60.1 88.1 75.6 77.5 68.8 70.2 91.3 88.7 83.4 80 86.1 56.1 67.9 62.9 75.5 62.6 92.4 85.8 75.4 77.5 72.7 68.3 75.8 88 89.6 71.5 83.8 Dew Point (C) 8.3 9.9 13.1 10.9 14.2 12.7 9.2 10.8 10.6 15.8 13.2 11.5 8.7 11.2 9.1 11.4 11.1 12.6 13.1 11.9 10.4 15 6.3 6.3 6.3 9.3 8.1 9.3 7.1 10.3 Pressure (mb) 1022.1 1010.0 1030.3 1028.1 1018.4 1012.8 1014.9 1007.4 1013.5 1008.3 1020.4 1029.7 1030.5 1030.0 1025.4 1023.6 1019.8 1014.7 1014.2 1017.7 1017.7 1001.5 1017.4 1031.9 1027.3 1017.2 1021.1 1013.1 1012.9 1009.4 Days with thunder _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ hail<5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ hail>/=5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ fog _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _