|
DECEMBER 2006
|
||
| Note | A total hosepipe and sprinkler ban is in effect in South East Water & Mid Kent Water supply areas until further notice. |
| 1st - 7th | Very unsettled and wet start to the month, with a low pressure of c. 950 hPa just to W of Ireland. Passage of fronts during pre-dawn of 3rd. Increasingly stormy especially in the SW of the UK, with prolonged rain early morning of 7th. Tonbridge misses the squall line which brought a tornado to NW London. |
| 8th - 10th | Deep low pushes across N France on the 8th with morning rain from an occlusion. The clearance brings a rare calm, sunny day on the 9th. The morning of the 10th starts sunny before turning cloudier and rain returns late in the day. |
| 11th - 15th | Another wet and windy morning on the 11th. It remains mild and windy but turns drier for a few days as high pressure lies to the S and Lows transit to the N again bringing frequent heavy rain to Wales, NW England and W Scotland. |
| 16th - 22nd | Passage of a cold front early hours of the 16th brings clear skies from mid morning. Ground frost 17th before another sunny day. With HP becoming dominant and calm winds, fog starts to become a regular feature from the 18th. The HP intensifies slowly over the southern UK. Prolonged sunshine and much improved visibility on the 22nd. |
| 23rd - 27th | Worsening anticyclonic gloom with mist and poor visibility as HP centre slips slowly eastward. Finally, late on the 27th the cloud breaks before an approaching (rainless) warm front crosses overnight. |
| 28th - 31st | Becoming increasingly stormy as LP systems reassert influence. After a sunny start the 30th is the wettest day of the year as a developing LP crosses central England. Warm and cold fronts are followed by squalls with some of the strongest wind gusts of the year here. The 31st is a near repeat. |
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ‡ 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 30% 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. * Comparison against averages 1984 - 2005 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 DECEMBER
2006 |
|||||||||||
|
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 |
7.3 | 12.6 | 90 | 9.9 | 0.0 | 1015.8 | f | 5.1 | 4.2 | 24 | SSW |
|
2nd |
9.7 | 10.3 | 79 | 6.4 | 0.5 | 1010.9 | st | 5.1 | 2.7 | 16 | SSW |
|
3rd |
8.2 | 10.4 | 66 | 4.1 | 1.2 | 993.7 | rs | 14.5 | 7.0 | 33 | SSW |
|
4th |
7.8 | 13.6 | 70 | 6.3 | 0.0 | 999.0 | st | 1.5 | 5.9 | 29 | SSW |
|
5th |
12.3 | 12.7 | 78 | 8.2 | 0.0 | 991.3 | st | 5.6 | 7.9 | 29 | SSW |
|
6th |
8.8 | 10.6 | 57 | 2.0 | 1.3 | 1003.9 | rs | 0.0 | 5.1 | 22 | SSW |
|
7th |
7.1 | 11.6 | 61 | 3.8 | 0.8 | 987.5 | fs | 17.0 | 8.2 | 34 | SSW |
|
8th |
5.6 | 7.8 | 84 | 5.2 | 0.2 | 985.3 | r | 4.6 | 2.4 | 20 | SSW |
|
9th |
3.1 | 7.9 | 68 | 2.3 | 1.5 | 1013.2 | r | 0.0 | 0.8 | 10 | SSW |
|
10th |
-1.3 | 8.9 | 66 | 2.8 | 0.7 | 1023.3 | f | 1.0 | 3.2 | 25 | SSW |
|
11th |
8.8 | 11.6 | 88 | 7.4 | 0.0 | 1012.3 | r | 5.3 | 5.3 | 30 | SSW |
|
12th |
1.7 | 10.9 | 72 | 5.4 | 1.2 | 1017.2 | f | 0.0 | 3.9 | 24 | SSW |
|
13th |
10.4 | 12.2 | 76 | 7.8 | 0.0 | 1021.2 | st | 0.0 | 6.6 | 26 | SSW |
|
14th |
11.4 | 12.6 | 76 | 8.1 | 0.0 | 1021.8 | fs | 0.0 | 7.1 | 27 | SSW |
|
15th |
10.2 | 11.1 | 78 | 7.3 | 0.0 | 1019.2 | f | 0.0 | 5.3 | 21 | SSW |
|
16th |
4.5 | 7.6 | 72 | 2.6 | 1.5 | 1022.3 | st | 3.0 | 1.7 | 22 | SSW |
|
17th |
1.2 | 8.5 | 74 | 3.8 | 1.5 | 1025.4 | st | 0.0 | 0.3 | 7 | SSW |
|
18th |
-0.3 | 5.8 | 92 | 4.2 | 0.0 | 1027.6 | st | 0.0 | 0.0 | 3 | ESE |
|
19th |
-0.6 | 3.2 | 93 | 2.1 | 0.0 | 1037.1 | st | 0.0 | 0.0 | 5 | WNW |
|
20th |
-3.7 | 2.5 | 93 | 1.5 | 1.3 | 1039.1 | fs | 0.3 | 0.1 | 5 | W |
|
21st |
-1.3 | 2.7 | 93 | 0.1 | 0.0 | 1042.0 | st | 0.0 | 0.1 | 5 | W |
|
22nd |
2.5 | 8.2 | 72 | 3.0 | 1.3 | 1041.3 | f | 0.0 | 0.1 | 6 | NNW |
|
23rd |
-0.4 | 6.1 | 85 | 3.7 | 0.0 | 1039.4 | f | 0.0 | 0.4 | 6 | WSW |
|
24th |
5.4 | 6.6 | 81 | 3.4 | 0.0 | 1036.5 | fs | 0.0 | 0.8 | 8 | SSE |
|
25th |
4.9 | 5.4 | 82 | 2.5 | 0.0 | 1035.0 | f | 0.0 | 0.3 | 7 | ESE |
|
26th |
4.2 | 6.2 | 84 | 3.6 | 0.0 | 1031.9 | f | 0.3 | 0.2 | 7 | ESE |
|
27th |
2.6 | 4.4 | 84 | 1.3 | 0.0 | 1028.8 | f | 0.0 | 0.5 | 16 | SE |
28th |
3.1 | 10.3 | 82 | 7.1 | 0.0 | 1024.4 | f | 0.0 | 2.8 | 16 | SSW |
29th |
4.4 | 10.6 | 88 | 6.9 | 0.0 | 1013.9 | f | 4.3 | 4.8 | 31 | SSW |
30th |
10.2 | 12.4 | 83 | 9.4 | 0.0 | 1006.4 | f | 19.8 | 7.7 | 35 | SSW |
31st |
8.3 | 12.9 | 79 | 7.6 | 0.0 | 1015.2 | fq | 5.8 | 6.8 | 30 | SSW |
| ‡ 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 50% 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 |