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MARCH 2012 daily and monthly summary

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MARCH 2012
April

March 2012 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 2012
 
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
3.7 15.7 15.3 56 6.5 8.0 1024.5 ST 0.0 0.2 7 N  Sunny
2nd
2.2 8.6 8.6 83 5.8 0.0 1023.5 F 0.3 0.4 7 SE  Fog am, drizzle night
3rd
6.8 12.4 11.3 76 7.6 2.5 1017.2 ST 0.5 2.7 17 SW  Rain am
4th
6.9 8.5 8.0 88 6.1 0.0 1009.9 F 8.6 3.3 24 N  Rain
5th
3.3 8.1 8.1 44 -3.5 2.5 1018.2 FS 0.0 7.5 32 N  Cloudy
6th
3.7 9.5 8.1 58 0.3 1.8 1023.9 FS 0.0 2.8 19 N  Cloudy
7th
3.9 9.8 9.6 88 7.7 0.2 1009.6 F 3.3 3.9 25 SW  Rain
8th
2.6 11.6 11.3 49 0.9 6.0 1030.6 RS 0.0 1.6 13 N  Sunny
9th
2.2 10.7 10.6 67 4.7 0.5 1033.0 FS 0.0 1.7 16 SSW  Cloudy
10th
8.7 15.2 14.8 67 8.7 3.0 1034.6 ST 0.0 1.0 10 SSW  Sunny spells pm
11th
7.7 15.0 14.8 60 7.1 5.0 1035.1 FS 0.0 0.3 8 N  Sunny
12th
1.6 16.9 15.8 56 7.0 7.2 1032.6 FS 0.0 0.4 10 N  Sunny
13th
6.1 9.5 9.1 75 4.9 0.0 1033.0 FS 0.0 0.4 8 NNW  Overcast
14th
5.1 13.6 12.8 58 4.8 6.0 1029.3 FS 0.0 0.4 8 SE  Sunny pm
15th
2.9 18.4 17.9 48 6.7 6.0 1021.3 F 0.0 0.9 12 SSW  Fog am, sunny pm
16th
7.7 9.8 9.4 74 5.0 0.0 1016.6 F 0.0 2.9 17 SSW  Overcast
17th
6.7 10.4 10.1 84 7.5 0.0 1010.5 F 3.3 2.2 14 SSW  Rain am, eve
18th
3.4 12.0 8.9 62 2.0 3.7 1016.0 RS 1.5 1.3 16 N  Rain showers
19th
1.7 13.1 11.7 41 -1.1 7.5 1031.5 ST 0.0 1.2 12 SSW  Sunny
20th
1.5 13.9 13.6 54 4.4 5.3 1033.1 FS 0.0 0.8 11 SSW  Sunny pm
21st
5.8 17.3 17.0 47 5.6 7.7 1031.6 F 0.0 0.4 13 S  Sunny
22nd
4.3 17.7 17.5 45 5.4 6.7 1026.2 FS 0.0 0.5 10 SSE  Sunny periods
23rd
3.3 20.9 20.6 37 5.4 8.5 1024.5 FS 0.0 0.1 6 N  Sunny
24th
3.7 20.0 19.6 39 5.3 8.5 1026.9 FS 0.0 0.3 10 ENE  Sunny
25th
3.9 13.3 12.6 57 4.3 7.2 1032.6 ST 0.0 0.6 10 ENE  Sunny periods
26th
3.6 19.5 19.4 28 0.4 8.3 1034.3 FS 0.0 0.6 13 ENE  Fog am, sunny
27th
3.2 19.3 18.9 29 0.4 8.5 1034.4 FS 0.0 0.5 12 ENE  Sunny
28th
1.9 22.3 22.2 29 3.3 8.3 1029.6 F 0.0 0.1 8 SE  Sunny
29th
3.6 19.4 18.3 38 3.8 8.3 1025.3 FS 0.0 1.0 14 N  Sunny
30th
5.0 17.5 16.7 53 7.1 6.2 1021.7 F 0.0 0.7 11 SE  Sunny periods
31st
5.4 10.9 10.4 58 2.5 0.0 1017.9 RS 0.0 1.4 17 N  Cloudy
                         
‡ 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 25% 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 1028 hPa Devon stretching to C Europe. LPs 963 hPa far W Atlantic and 980 hPa Norwegian Sea
Fog and mist clears around 08.00. A sunny day, some haze due to patchy high cloud.
2nd
Fog and mist in the morning, staying overcast all day and dull at times. Some drizzle around minight into the 3rd.
3rd
A murky start with some rain late morning. Brightening in the afternoon to give sunny spells.
4th
LP 1013 hPa develops in the English Channel and tracks E, deepening.
A dull day with drizzle from early morning and then rain until the night. Temperature drops sharply in mid afternoon.
5th
Sunny spells in the morning, cloudy afternoon with spots of rain.
6th
Overcast and gloomy to start, giving way to a sunny spell around lunchtime before clouding over again.
7th
Overcast and gloomy with light rain from 09.00 to 12.30. Bright spells pm broken by another spell of light rain and a light hail shower.
8th
Hazy start, then long sunny periods.
9th
HP 1039 hPa from Biscay across central Europe to western Ukraine
Mainly cloudy and dull except for two very brief bright spells morning and lunchtime.
10th
Medium level cloud cover persists through the morning, slowly breaking up to give afternoon spells of sunshine.
11th
Long sunny spells although sometimes hazy.
12th
A day of almost unbroken sunshine - again rather hazy.
13th
An overcast day, dull to start then a little brighter in early afternoon.
14th
HP 1033 hPa Southern North Sea
An overcast day start, low cloud clearing to give hazy sunny periods from 11.30.
15th
Fog in the morning until around 11.00, becoming sunny with a haze.
16th
LP 991 hPa Faroe Isles.
An overcast and rather dull day .
17th
Overcast and dull with intermittent rain in the morning. A dry afternoon but spells of further rain early evening and night.
18th
Sunny start, becoming cloudier with rain showers in the middle of the day.
19th
A mainly sunny day with a few brief cloudy interludes.
20th
A cloudy morning giving way to sunny spells around 11.30.
21st
A day with long sunny periods, cloudier spell mid-morning.
22nd
Periods of hazy sunshine interrupted by spells with thicker high cloud.
23rd
HP 1032 hPa North Sea.
A sunny day with haze, just a couple of brief interruptions from patches of high cloud. Equals previous warmest March day in site records.
24th
A sunny day with haze and only patchy thin high cloud.
25th
A cloudy start giving way to bright sunshine, becoming hazy in the afternoon with wisps of high cloud.
26th
Fog until around 08.30 clearing to give bright sunshine without the haze of previous days.
27th
A day of uninterrupted bright sunshine.
28th
A day of uninterrupted bright sunshine. New site record for high temperature in March, also greatest ever daily range of 20.4C from min to max temp.
29th
Hazy sunshine just interrupted briefly once or twice in the day.
30th
Sunny periods with a couple of cloudier spells morning and afternoon.
31st
A cloudy day, overcast in the morning and cloud a little more broken in the afternoon.