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MARCH 2011 daily and monthly summary

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MARCH 2011
April

March 2011 monthly summary stats
‡ SUN: Sunshine hours are calculated approximately and solely from solar radiation readings, but note that the solar sensor's exposure to sunshine is limited. The sensor receives only up to 60% of total possible sunshine exposure this month due to obstruction. There is no allowance for sunshine by visual observation only, so the sunniest day figures above can be very significantly less than the actual daily sunshine duration.
THW = Shaded Heat Index calculated with cooling/warming effect of wind and humidity to give an apparent temperature.
THSW = Unshaded Heat Index calculated with cooling/warming effect of wind, humidity and full direct sunshine to give an apparent temperature.
EVAPO-TRANSPIRATION is drying effect due to sun and wind, and is equivalent to "negative rainfall"


   DAILY STATS MARCH 2011
 
TEMPERATURE ºc
HUMIDITY
SUN ‡
PRESSURE
RAINFALL
WIND SPEED
DIRECTION
 WEATHER
 NOTES
DATE
Low
(21-09h)
High
(09-21h)
Temp at 14.00z
RH %
at 14.00z
Dewpoint ºc
at 14.00z
Bright
sun hrs
hPa   †
at 14.00z
Day Total
(mm)
Average
(mph)
Max Gust
(mph)
Dominant
(Compass)
 Precipitation
 type etc ‡
                       
1st
3.1 5.3 5.0 76 1.1 0.0 1036.2 FS 0.0 2.5 14 N  Overcast
2nd
3.2 7.7 7.5 65 1.3 4.2 1033.1 FS 0.0 2.1 14 NE  Sunny pm
3rd
0.4 7.3 7.0 64 0.6 3.2 1032.6 F 0.0 2.2 14 NE  Sunny pm
4th
1.0 8.1 7.7 61 0.6 3.3 1030.3 FS 0.0 1.0 11 NE  Sunny pm
5th
-0.3 7.5 6.3 73 1.8 1.0 1028.1 FS 0.0 1.1 10 NE  Cloudy
6th
3.6 6.5 6.2 62 -0.5 0.3 1029.8 FS 0.0 1.3 12 NE  Cloudy
7th
-1.6 11.5 11.3 32 -4.8 7.2 1026.9 F 0.0 0.5 14 SE  Sunny
8th
-3.7 11.4 11.4 43 -0.7 7.2 1017.9 F 0.0 2.3 14 SW  Sunny
9th
4.1 11.3 10.8 50 0.8 4.7 1014.8 ST 0.0 3.2 18 SSW  Sunny spells
10th
5.2 11.8 11.5 66 5.4 1.2 1009.4 FS 0.0 5.4 25 SW  Cloudy
11th
4.8 11.7 11.5 53 2.2 2.8 1013.6 F 0.0 2.8 16 SW  Cloudy pm
12th
5.6 14.4 11.9 61 4.6 3.7 998.8 F 1.8 1.2 12 SE  Rain eve.
13th
8.7 11.7 10.8 82 7.9 0.2 1000.0 RS 1.0 1.1 12 SW  Drizzle pm
14th
-0.1 9.9 8.9 76 4.9 0.7 1014.7 RS 0.0 0.7 10 SW  Cloudy
15th
6.5 16.7 14.1 66 7.8 5.8 1011.2 FS 0.0 0.8 12 NNW  Sunny periods
16th
7.3 8.2 8.1 86 5.9 0.0 1009.8 FS 0.0 2.0 13 N  Overcast
17th
3.7 8.2 6.3 79 2.9 0.1 1014.4 RS 0.0 1.5 11 N  Overcast
18th
4.6 6.7 5.6 89 3.9 0.0 1020.5 RS 4.8 0.4 11 N  Rain
19th
-0.5 12.9 12.7 41 -0.2 8.3 1033.1 FS 0.0 0.4 7 SE  Sunny
20th
0.1 13.0 12.2 56 3.6 6.3 1031.1 FS 0.0 0.8 11 SW  Sunny periods
21st
1.7 17.1 16.9 51 6.7 4.2 1032.6 FS 0.0 0.3 7 N  Fog am
22nd
3.2 18.6 16.9 45 4.9 4.5 1036.1 FS 0.0 0.2 7 SE  Sunny spells
23rd
2.1 18.1 17.9 48 6.7 8.2 1037.6 F 0.0 0.4 10 ENE  Sunny
24th
3.8 18.6 18.6 46 6.7 8.2 1031.0 F 0.0 0.6 12 ESE  Sunny
25th
2.2 18.7 17.6 46 5.8 7.8 1016.9 F 0.0 0.3 11 SE  Sunny periods
26th
6.1 13.6 13.2 68 7.4 2.5 1012.7 FS 0.0 0.3 7 WNW  Cloudy
27th
5.6 16.3 15.8 55 6.8 8.2 1011.1 FS 0.0 0.4 10 SE  Sunny periods
28th
3.8 15.0 14.7 50 4.3 5.2 1015.2 FS 0.0 0.5 10 SE  Sunny periods
29th
1.7 17.3 17.3 47 5.9 5.0 1010.7 F 0.0 0.4 10 SE  Sunny spells
30th
6.3 10.8 9.5 88 7.6 0.0 1009.7 FS 1.3 2.3 18 SW  Rain pm
31st
8.7 15.6 15.6 73 10.8 4.3 1011.6 R 2.8 4.8 22 SW  Rain am
                         
‡ SUN: Sunshine hours are calculated approximately and solely from solar radiation readings, but note that the solar sensor's exposure to sunshine is rather limited. The sensor receives less than 60% of total possible sunshine exposure this month, and there is no allowance for sunshine by visual observation only, so the figures above can be very significantly less than the actual daily sunshine duration.
† Barometer trend (previous 3 hours) : F = falling, ST = steady, R = rising; Q = quickly, S = slowly
Weather Notes use METAR codes: OVC = overcast; SHRA = rain showers; '+' = heavy; CAVOK = no cloud below 5000 ft & visibility> 10 km & no fog, precipitation or snow; SN = snow; RASN = Rain and snow

1st
HP 1042 hPa North Sea lying from SSW to ENE across the UK, LP near Sardinia. An overcast day.
2nd - 4th
Overcast and cloud slowly breaking up am, sunny pm with haze.
5th & 6th
HP 1037 hPa N of Faeroe Is, LP 977 hPa E of St Petersburg. Overcast/cloudy until after 14.00h, some brief sunny intervals.
7th & 8th
Ground frost, sunny and cloudless.
9th
Cold front clears overnight without any rain, sunny and cloudy spells through the day.
10th
LP 981 hPa NW Scotland. Mainly cloudy with some sunny spells.
11th
Sunny spells am, cloudy pm.
12th
LP 994 hPa SW Scotland, sunny am clouding over with light rain evening continuing overnight.
13th
Light rain continued overnight, cloudy and sometimes dull am with just brief brightness. Overcast pm with drizzle clearing at sunset.
14th
Sunny am, clouding over with overcast pm.
15th
Misty start, sunny periods, clouding over late pm with overcast and mist by evening.
16th
Dull with overcast and mist .
17th
HP to W and SW, LP 1000 hPa Austria. Overcast, dull and misty am becoming brighter late pm with some weak sunshine just before sunset.
18th
Frontal rain moves slowly across S England, rain from around 10.30 to 17.00, staying overcast all daylight hours.
19th
Ground frost, uninterrupted sunshine, clear sky almost the whole day.
20th
HP 1034 hPa C Europe, LP 986 hPa Iceland. Sunny periods, high cloud, slight haze.
21st
Fog am clearing around 09.30, sunny periods but cloudier late pm.
22nd
Alternating cloudy and sunny spells through the day.
23rd
HP 1042 hPa over UK. Almost uninterrupted sunshine, just some small cumulus in the sky.
24th
Sunshine with patchy high cloud.
25th
HP 1029 hPa SSW of Iceland. Misty start followed by hazy sunshine with some cumulus clouds pm.
26th
Cloudy with some mist, brightening pm with some hazy sunshine.
27th
Mostly sunny, some thin high cloud giving hazy spells.
28th
Cloudy am brightening just before noon with sunny periods pm.
29th
HP 1019 hPa C Europe, LP 975 hPa at 50°N 40°W.Bright start early am then cloudy. Sunny spells pm.
30th
Mainly overcast day, light rain pm from occluded front.
31st
LP 981 hPa Outer Hebrides. Rain from warm front early am, overcast giving way to sunny spells pm.