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AUGUST 2011 daily and monthly summary

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AUGUST
September

August 2011 Monthly Stats summary
‡ 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 65% 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"

spells
   DAILY STATS AUGUST 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
11.7 27.8 26.5 37 10.6 8.8 1011.5 FS 0.0 1.3 20 SE  Sunny
2nd
14.6 28.6 28.1 37 12.0 6.7 1011.9 FS 0.0 0.6 12 SE  Sunny spells
3rd
14.5 28.5 28.1 36 11.6 7.5 1012.6 ST 0.0 1.7 14 SW  Sunny periods
4th
15.4 19.2 18.1 90 16.4 0.7 1006.9 FS 9.7 2.8 17 SW  Rain
5th
12.3 23.6 23.3 51 12.6 5.0 1010.1 FS 0.0 1.5 13 SW  Sunny spells
6th
13.7 18.9 16.2 75 11.7 1.8 1001.2 FS 0.3 1.9 12 SW  Light rain pm
7th
11.8 19.2 19.0 53 9.2 5.8 1002.2 FS 13.2 3.9 24 SW  Rain night pm
8th
11.2 19.9 18.8 59 10.6 5.8 1007.8 RS 0.8 2.4 21 SSW  Rain showers pm
9th
11.1 20.1 19.1 43 6.2 6.2 1022.0 RS 0.0 0.9 16 N  Sunny periods
10th
9.4 20.2 19.3 56 10.3 7.3 1019.2 F 0.0 3.0 21 SW  Sunny periods
11th
14.2 19.5 17.1 86 14.7 0.3 1008.8 FS 0.5 4.0 17 SW  Rain pm
12th
15.4 22.7 22.7 53 12.6 3.0 1009.4 FS 0.0 2.3 12 SSW  Sunny spells
13th
15.4 22.9 22.5 56 13.3 4.3 1004.0 ST 1.8 2.7 16 SW  Rain am
14th
13.8 22.1 20.6 50 9.8 4.5 1005.8 RS 0.0 2.0 14 SSW  Sunny spells
15th
11.8 21.6 20.3 47 8.6 3.3 1015.6 RS 0.0 2.1 14 SW  Sunny intervals
16th
13.4 20.1 19.1 65 12.4 2.2 1014.7 FS 0.0 2.8 17 SW  Cloudy
17th
13.1 22.0 21.8 43 8.7 3.3 1014.8 FS 0.0 0.8 10 N  Sunny intervals
18th
13.3 19.2 16.6 73 11.7 0.2 1011.8 FS 0.0 1.3 13 N  Cloudy
19th
9.9 21.7 21.2 42 7.7 6.8 1017.9 FS 0.0 1.7 13 SSW  Sunny periods
20th
12.5 23.0 19.8 54 10.3 5.5 1018.0 ST 0.0 1.2 12 SW  Sunny periods
21st
13.6 24.9 24.9 49 13.5 5.5 1012.4 RS 0.0 1.4 16 SSW  Sunny periods
22nd
11.7 21.2 20.9 52 10.7 1.5 1017.4 FS 0.5 0.5 8 SE  Rain evening
23rd
14.5 15.9 15.4 92 14.2 0.0 1009.8 ST 5.3 0.4 8 N  Rain am
24th
13.6 20.1 19.6 54 10.0 6.2 1012.3 ST 0.8 1.5 14 SW  Rain am
25th
11.3 19.0 18.4 57 9.7 1.3 1008.6 ST 0.5 1.7 16 SW  Rain showers am
26th
12.8 17.4 14.9 90 13.3 2.8 1002.4 RS 8.6 1.3 16 SW  Rain
27th
11.3 19.3 18.9 46 7.1 5.3 1011.8 RS 0.0 2.2 18 SSW  Sunny spells
28th
11.6 18.7 18.2 56 9.3 2.8 1014.1 FS 1.3 2.2 14 SSW  Rain showers pm
29th
9.2 16.9 16.6 46 4.9 4.7 1016.2 ST 0.0 1.5 17 SSW  Sunny spells
30th
11.9 16.1 15.7 56 6.9 0.0 1015.5 FS 0.0 0.8 8 N  Cloudy
31st
12.4 18.8 18.3 54 8.9 1.5 1013.8 FS 0.0 0.3 7 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
LP 992 hPa south of Iceland, HP 1018 hPa NW Germany. Mainly sunny with only patchy high cloud.
2nd
Cloudy spells to start then periods of hazy sunshine with more cloud from late pm.
3rd
Cloudy spells to start then periods of hazy sunshine, clearer later.
4th
LP 1005 hPa Ireland. Light rain with some heavier bursts from warm front early am to mid afternoon.
5th
Sunny spells am and pm.
6th
Mainly cloudy day with some light rain pm, brighter in the evening.
7th
LP 986 hPa E of Scotland. Sunny at first then three short but heavy rain showers late am, sunny spells pm. Heavier rain after 22.00h.
8th
Sunny spells and breezy with a couple of showers early pm.
9th & 10th
Sunny periods.
11th
Mainly overcast day with a little rain early afternoon followed by a brief brighter spell.
12th
Periods of cloud or overcast with brighter spells from midmorning to early afternoon.
13th
LP 988 hPa W of N Scotland. Rain early am clearing slowly to give sunny spells then cloudy from late pm.
14th
Mainly cloudy but bright morning with sunny spells following in the afternoon.
15th
Sunny start gradually clouding over by around 15.00. Some intermittent light drizzle late evening.
16th
LP 1007 hPa S Scotland. Mainly cloudy due to passage of frontal cloud but dry. A few sunny intervals through the day.
17th
Mainly cloudy again with a few sunny intervals through the day, cloudier late pm onwards.
18th
LP 1010 hPa Brittany. Cloudy but bright morning with brief sunshine, more cloudy by noon and overcast pm. Light spots of rain evening.
19th
Sunny am, more cloudy mid afternoon then sunny periods evening.
20th
Cloudy start, some bright spells before midday. A cloudy period mid afternoon followed by sunny periods.
21st
A mixture of cloud and hazy sunshine in the morning, sunny periods from mid afternoon
22nd
Sunny morning becoming cloudier by midday. Cloudy afternoon then some light rain after 18.00h.
23rd
Rain, moderate to heavy from around 07.00 to 10.30 becoming more drizzly. An overcast and dull afternoon.
24th
Dull morning with intermittent rain, brightening around 11.30 with long sunny periods.
25th
LP 993 hPa SW Ireland. Rain showers am, mainly cloudy pm with a little sunshine.
26th
LP 1002 hPa SW England. Moderate rain after midnight to about 05.30, then further intermittent light/moderate rain 09.30 to 13.30. Sunny spells later.
27th
Sunny spells with a few light and brief rain showers that gave a trace of rain only.
28th
Sunny spells am, becoming cloudy pm with a heavy rain shower early evening.
29th
HP 1024 hPa W of British Isles, LP 989 hPa S Norway. Sunny spells especially am, with cloudy periods.
30th
Stubborn cloud sheet - mainly medium height - covers much of the UK and persists all day.
31st
Another cloudy day but this time with some breaks to give a little sunshine.