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February 2007 daily and monthly summary

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FEBRUARY 2007
March 2007

Note
A total hosepipe and sprinkler ban is in effect in Mid Kent Water supply areas until further notice, but South East Water has now lifted its hosepipe restrictions.
1st - 4th
HP over the British Isles, sunny spells and feeling mild. 3rd was a cloudless day.
5th - 9th
HP moves over the continent while LP systems slowly move in from the W, allowing colder air to advect southwards into the UK. LP moves across S England on the morning of the 8th bringing light to moderate snowfall for approx 6 hrs, leaving a covering of a few cm which lasted until the afternoon before largely thawing. This was the first precipitation for 11 days.
10th - 17th
Gradually becoming milder with maritime airflow. Frequent showers until just after midday on the 11th. LP tracks across the midlands on the 12th bringing outbreaks of rain. Three long spells of rain overnight 13th to 14th.
18th - 27th
Mainly mild, cloudy and generally dull spell of weather with frequent bands of rain and showers from the 21st. Continuing unsettled and more windy towards the end of the month as Atlantic systems cross the southern half of the UK.
 FEBRUARY 2007 - MONTHLY SUMMARY
 TEMPERATURE
 Average Maximum 9.5
ºc 
 ( +1.7 )*
 Average Minimum 4.1
ºc 
 ( +1.7 )*
 Monthly Mean 6.5
ºc 
  
 Highest Maximum 12.6
ºc 
  (17th)
 Lowest Minimum -5.6
ºc 
  (  7th)
 Days Min<= 0 ºC 6
 
 Days Max < 5 ºC 2
 
   
 
 AMBIENT TEMPERATURE
 Low Wind Chill -5.6
ºc 
  ( 7th)
 Low Heat Index (THW) -5.7
ºc 
  ( 7th)
 High Heat Index (THW) 11.9
ºc 
  ( 1st)
 High Sun Index (THSW) 21.1
ºc 
  (21st)
    
 
 RAINFALL
 Monthly Total 69.5
 mm
 ( 140% )*
 Rainy Days (=>0.2mm) 16
( +2 )*
 Inc days =>1mm) 14
 
 Dry Days 12
( -2 )*
 Highest Daily Total 8.9
 mm
  (14th)
 Highest Rain Rate 22.6
 mm/hr
  (28th)
 Days with snowfall 1
 
   
 EVAPO-TRANSPIRATION
 Highest Daily 1.7
 mm (28th)
 Monthly Total 18.9
 mm
 WIND
 Monthly Average 1.8  mph  
 Highest Gust 29  mph (28th)
 Dominant Directions SSW  (40%)
SE  (11%)
ESE  (10%)
W,N  (9% each)
   
     
 SUNSHINE†
 Sunniest Day
6.2
  hrs (15th)
 Monthly Sunshine
59.4
  Hours
 Peak Solar Rad.
684
  w/m² (26th)
 Total Solar Energy
2702
  Langleys
 
   
 DEWPOINT
 Average at 14.00h 3.9 ºc
 Highest Reading 9.6 ºc   (27th)
 Lowest Reading -8.1 ºc   (  7th)
 RELATIVE HUMIDITY
 Average at 14.00h 71 %
 Lowest Reading 41 % (7th)
 Monthly Average 80 %
 BAROMETER
 Monthly Mean 1007.2  hPa  
 Highest Reading 1039.8  hPa ( 3rd)
 Lowest Reading 979.5  hPa (12th)
‡ 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 70% of total possible sunshine exposure this month. 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.
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 FEBRUARY 2007
 
TEMPERATURE ºc
HUMIDITY
SUN ‡
PRESSURE
RAINFALL
WIND SPEED
DIRECTION
DATE
Minimum
(21-09h)
Maximum
(09-21h)
RH %
at 14.00
Dewpoint ºc
at 14.00
Bright
sun hrs
hPa   †
at 14.00
Day Total
(mm)
Average
(mph)
High Gust
(mph)
Dominant
(Compass)
                   
1st
 6.6 12.4 71 6.8 1.7 1029.0 st 0.0 0.2 7 SSW
2nd
 4.1 11.4 69 5.7 1.5 1032.2 st 0.0 0.4 11 N
3rd
 -0.3 10.7 50 0.7 5.5 1037.9 f 0.0 0.0 6 SE
4th
 -1.6 9.1 71 4.1 3.4 1028.6 f 0.0 0.2 10 ESE
5th
 2.4 6.0 76 1.5 1.3 1015.8 f 0.0 0.4 11 N
6th
 0.2 5.3 58 -2.5 4.4 1004.5 f 0.0 0.2 11 N
7th
 -5.6 4.6 54 -4.2 6.0 1000.8 fs 0.0 0.1 6 SSW
8th
 -2.2 4.2 90 1.2 1.6 986.3 r 6.9 0.7 16 SSW
9th
 -0.8 5.3 84 2.2 0.5 1001.6 f 1.0 0.5 11 ESE
10th
 4.9 9.0 87 6.1 0.9 996.8 r 3.0 1.9 24 SSW
11th
 7.2 10.4 75 5.3 2.5 992.2 r 7.1 4.5 24 SSW
12th
 7.4 9.5 82 5.4 0.2 982.2 r 6.9 5.0 27 SSW
13th
 6.6 9.6 63 2.0 4.6 1008.0 st 4.3 2.8 16 SSW
14th
 7.3 8.6 79 4.2 1.5 1001.4 r 8.9 1.4 14 N
15th
 -0.9 10.7 66 3.8 6.2 1016.5 r 0.0 2.3 20 SE
16th
 4.5 11.4 59 3.5 1.8 1008.6 f 0.0 0.3 11 ESE
17th
 3.2 12.6 63 5.4 5.0 1009.6 rs 0.0 0.1 7 N
18th
 6.1 7.8 79 4.4 0.0 1017.2 fs 0.0 0.0 7 N
19th
 6.2 9.9 83 6.5 0.0 1007.9 f 0.0 1.0 14 SE
20th
 8.3 9.7 89 7.8 0.0 1006.4 st 0.3 1.1 12 SSW
21st
 7.8 11.6 62 3.1 3.2 1006.7 st 6.1 2.0 19 SSW
22nd
 5.9 9.3 66 5.0 0.0 1002.5 f 4.1 2.7 19 SSW
23rd
 8.0 11.0 83 7.2 0.2 998.3 f 3.6 3.3 21 SSW
24th
 8.1 11.4 66 5.3 0.8 994.1 rs 4.1 3.1 18 SSW
25th
 4.7 10.2 73 5.1 0.3 996.1 r 5.3 1.9 18 SSW
26th
 7.3 10.2 52 -0.1 3.0 1013.9 r 0.3 2.5 21 N
27th
 2.7 11.7 79 8.2 0.0 1003.6 fq 5.1 4.2 25 SSW
28th
 7.5 12.1 67 5.5 3.3 992.5 f 2.5 7.4 29 SSW
                     
‡ SUN: Sunshine hours are calculated approximately and solely from solar radiation readings, but note that the solar sensor's exposure to sunshine is limited to approx 75% of total possible sunshine exposure each day, and there is no allowance for sunshine by visual observation only, so the figures above can be significantly less than the actual daily sunshine duration.
† Barometer trend (previous 3 hours) : f = falling, st = steady, r = rising; q = quickly, s = slowly