PITSFORD HALL WEATHER STATION CLIMATOLOGICAL OBSERVATIONS APRIL 2001 Observations 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 Time 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 900 Total Cloud 7 7 7 8 8 8 5 6 6 6 8 7 7 8 7 8 8 3 2 5 2 7 8 8 8 8 2 4 6 5 Wind Direction s s ssw nw ssw ssw s nw nw nw n nw ne nw n nne wnw n nnw n n s s sse s s ne nw sw n Speed (knots) 9 5 8 6 10 12 8 15 2 15 10 2 2 3 19 9 9 17 18 15 4 15 9 4 10 3 0 13 0 6 Weather 1 3 2 21 2 2 2 2 1 3 50 5 1 2 3 2 3 3 3 3 2 2 50 61 61 3 1 3 3 3 Visibility 7 7 7 7 7 7 7 7 6 6 5 5 7 7 8 7 7 7 7 7 7 7 7 7 7 7 6 7 7 7 Screen (C) Dry Bulb 10.4 13.7 9.9 3.9 6.5 11.1 9.0 7.1 9.3 10.1 7.0 8.8 5.3 6.9 9.0 7.1 6.4 6.2 6.8 6.0 7.0 7.5 8.2 7.7 8.2 10.1 8.1 9.5 7.0 9.1 Wet Bulb 9.3 12.0 8.6 3.8 5.9 10.0 7.1 6.3 8.9 8.7 6.5 7.5 3.3 5.5 7.4 5.5 4.4 4.2 4.6 4.5 5.2 5.6 7.4 6.6 7.8 8.9 6.8 7.9 5.8 6.2 Max 16.2 18.2 15.2 10.4 11.5 14.9 11.5 11.3 17.2 14.1 10.9 11.9 8.6 11.7 12.4 9.7 9.9 8.6 9.6 9.3 12.8 10.6 12.9 8.8 12.5 14.2 15.0 13.9 13.5 14.0 Min 6.3 6.5 4.3 3.7 2.2 5.4 2.6 1.3 4.9 6.5 4.4 3.9 3.3 2.1 6.6 4.2 -0.7 0.3 -0.9 0.3 0.5 3.7 5.2 3.3 5.0 4.0 2.7 7.4 4.0 2.7 Ground Obs Grass Min 1.5 0.8 0.1 4.0 -0.4 4.5 0.3 -3.8 5.0 4.0 -0.5 -2.0 2.7 -2.5 3.2 -0.4 -5.9 -3.5 -4.9 -3.4 -3.6 0.6 4.7 -2.1 0.8 -1.4 -2.3 4.2 -0.7 -2.4 Conc. Min 4.6 5.1 3.4 6.0 1.2 6.1 1.6 0.6 6.5 6.5 3.7 3.0 4.4 2.2 6.1 4.5 -1.0 0.1 -1.0 -0.3 -1.0 3.4 5.8 2.9 3.4 2.8 2.3 6.2 3.4 1.6 Bare Earth Min 4.1 5.0 3.8 5.0 1.6 5.2 2.1 1.7 7.1 9.7 4.1 3.8 4.7 3.0 6.1 5.1 0.6 0.6 -0.1 0.5 -0.3 3.5 6.0 3.6 3.4 3.5 3.2 6.6 4.2 2.9 Soil Temps (under grass) Surface _ _ _ _ _ _ _ _ _ 6.9 8 10.2 9.2 7 9.5 10.4 8.9 10.3 11 7.5 11 9.2 9.5 8.8 8.4 10.4 9.5 11.6 8.4 13.4 5cm _ _ _ _ _ _ _ _ _ 8.6 7.8 7.8 7.7 7.1 8 8.3 6.9 6.7 5.9 5.5 6.2 7.1 8.2 7.7 7 8.3 7.9 8.2 8.9 8.4 10cm _ _ _ _ _ _ _ _ _ 9.7 8.6 8.4 8.7 8 8.7 9 7.9 8 7.4 6.9 6.9 7.7 8.5 8.5 7.7 8.7 8.7 9.8 9.1 9.7 20cm _ _ _ _ _ _ _ _ _ 10.1 9.1 8.8 9.1 8.6 9 9.3 8.5 8.6 8 7.5 7.5 8.4 8.8 9 8.2 9.1 9.4 10.2 9.7 10.2 30cm 8.2 9.2 9.6 9.4 8.7 6.5 8.7 8.1 8.8 10.0 9.3 9.0 9.4 8.9 9.0 9.4 8.8 8.9 8.5 7.9 7.9 8.5 8.9 9.1 8.5 9.3 9.6 10.2 10.0 10.1 40cm 7.9 8.8 9.2 9.2 8.8 6.8 8.3 8.1 8.5 9.5 9.1 8.9 9.0 8.8 8.8 9.0 8.8 8.8 8.6 8.1 7.9 8.4 8.6 9.1 8.5 9.0 9.4 9.7 9.8 10.1 50cm 7.8 8.6 9.1 9.5 9.1 7.1 8.4 8.3 8.4 9.2 9.2 9.0 9.2 9.1 8.9 9.2 9.0 8.9 8.8 8.5 8.2 8.5 8.6 9.0 8.6 9.1 9.3 9.7 9.9 10.1 100cm n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a Soil Temps (bare soil) 5cm 7.9 10.8 9.7 7.0 6.6 6.1 7.4 5.7 9.6 10.1 7.7 9.3 7.7 6.9 9.0 9.5 7.9 8.5 8.4 6.6 7.8 7.7 9.3 7.9 7.2 9.9 8.6 10.1 8.2 10.1 10cm 6.9 8.9 8.4 7.5 6.3 6.3 6.4 5.4 8.4 9.0 7.5 7.8 7.1 6.8 8.4 8.5 6.6 6.9 6.3 5.5 6.1 6.7 8.1 7.3 6.7 8.3 7.5 8.4 8.0 8.6 20cm 7.3 8.4 8.7 8.0 7.1 6.4 7.0 6.8 8.2 9.5 8.2 7.9 8.1 7.5 8.5 8.6 7.1 7.5 n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a Ground Without snow 1 1 2 3 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 1 With snow Snow depth Concrete 1 0 0 2 0 0 0 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 1 2 2 1 0 1 2 0 Rainfall Total tr 4.4 16.0 2.1 10.3 5.0 0.8 5.6 2.4 tr tr _ _ 2.1 2.2 tr 1.5 0.4 2.8 _ _ 9.6 0.1 8.9 3.1 _ 2.6 1.1 tr _ Duration _ 4.5 n/a 1.5 4.5 1.3 2.5 5.5 1.3 _ _ _ _ 6.5 3.0 _ 3.0 0.5 0.8 _ _ 11.5 0.3 7.8 1.8 _ 1.3 0.8 _ _ Acidity _ 6.60 6.80 _ 6.41 6.82 _ 6.55 6.16 _ _ _ _ 6.45 6.48 _ _ _ 6.57 _ _ 6.12 _ 6.20 6.51 _ 6.18 5.96 _ _ Run of Wind Miles 111.08 142.01 197.16 174.69 183.78 180.59 189.12 69.61 139.05 186.72 62.51 89.99 75.05 166.98 155.43 100.24 169.49 157.49 191.4 144.22 87.19 164.92 66.74 114.88 82.81 67.13 121.4 150.15 76.34 33.23 Mean 6 7.7 10.7 9.5 10 9.8 10.2 3.8 7.5 10.1 3.4 4.9 4.1 9 8.4 5.4 9.2 8.5 10.4 7.8 4.7 8.9 3.6 6.2 4.5 3.6 6.6 8.1 4.1 1.8 Gust 17 22 39 37 31 25 40 21 30 36 20 21 <15 37 36 27 33 33 38 36 17 24 <15 17 20 19 36 42 27 50 Sunshine 7.2 4.5 3.9 5.5 0.0 1.5 4.6 5.4 6.3 4.2 0.6 1.1 3.1 0.0 5.1 3.3 4.4 7.5 8.6 7.2 5.6 1.6 6.5 0.0 4.8 7.7 5.5 9.0 7.2 11.3 Statistics Saturated VP(Twb) 1.172 1.403 1.118 0.802 0.929 1.229 1.009 0.955 1.141 1.126 0.968 1.037 0.774 0.904 1.03 0.904 0.837 0.825 0.849 0.843 0.885 0.91 1.03 0.975 1.059 1.141 0.989 1.066 0.923 0.949 VP 1.097 1.287 1.03 0.795 0.888 1.154 0.88 0.901 1.114 1.031 0.934 0.949 0.639 0.809 0.921 0.796 0.702 0.69 0.7 0.742 0.763 0.781 0.976 0.9 1.032 1.059 0.901 0.957 0.842 0.753 Saturated VP 1.262 1.569 1.22 0.808 0.968 1.322 1.149 1.009 1.172 1.237 1.002 1.133 0.891 0.995 1.149 1.009 0.962 0.949 0.989 0.936 1.002 1.037 1.088 1.052 1.088 1.237 1.081 1.188 1.002 1.156 RH % 86.9 82 84.4 98.4 91.7 87.3 76.6 89.3 95.1 83.3 93.2 83.8 71.7 81.3 80.2 78.9 73 72.7 70.8 79.3 76.1 75.3 89.7 85.6 94.9 85.6 83.3 80.6 84 65.1 Dew Point 8.3 10.7 7.4 3.7 5.2 9.1 5.1 5.5 8.5 7.4 6 6.2 0.6 3.9 5.8 3.7 1.9 1.7 1.9 2.7 3.1 3.4 6.6 5.4 7.4 7.8 5.5 6.3 4.5 2.9 Pressure 1019.0 1009.2 1011.0 996.7 1008.2 1001.2 996.7 1017.3 1012.8 1010.8 1026.7 1030.5 1032.7 1027.6 1013.1 1020.7 1021.0 1012.5 1013.6 1014.5 1016.8 1006.0 1001.5 1001.8 1001.3 1009.9 1002.8 1003.8 1001.0 1012.0 Days with thunder _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ hail<0.5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 1 1 _ _ _ _ _ _ _ _ _ _ _ hail>/=0.5mm _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ snow _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 1 1 _ _ _ _ _ _ _ _ _ _ _ fog _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _