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OCTOBER 2008 daily and monthly summary

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OCTOBER 2008
November 2008
1st - 7th
LP 980 hpa, southwest close to S Norway, drifting towards Finland while deepening. Light/moderate rain a.m. rush hour as cold front passes. 4th, Extended LP area 990-995 hpa, W of Scotland to S Scandinavia, extratropical storm Laura to W of Ireland moving E with light rain late evening. 5th, LP 977 hpa, S Norway, drifting NE while filling slowly, satellite LP 990 hpa, Cornwall, moving east to London area bringing early morning and late morning rain from warm front; short, heavy shower as cold front passes pm. 7th, LP 975 hpa, south of Iceland, extending trough 995 hpa towards Ireland, swivelling towards Scandinavia. Light rain early am and moderate/heavy showers in mid pm.
8th - 15th
LP 994 hpa, NE close to Scotland. HP 1028 hpa, SE of Azores, drifting NE while extending towards C Europe. HP influence brings long sunny periods at first. 11th, 1034 hpa over Austria, weakening slowly. Fog clearing by 10am on 11th. Lingering fog on 12th until midday. Early morning fog 13th and 14th. Precipitation during this period from condensation only. LP crosses England on 15th with passage of warm and cold fronts.
16th - 22nd
HP 1025 hpa, Azores, extending ridge 1020 hpa towards NE France, strengthening. 18th: LP 975 hpa SW of Iceland, moving NE while deepening, HP 1025 hpa, C Europe and Black Sea, weakening from the NW by 19th. 20th: LP 949 hpa near Faeroe Islands moving NE, occluded then cold fronts with moderate and occasionally heavy rain crossing SE England evening and early night. Ground frost and patchy shallow fog 22nd.
23rd - 26th
Complex LP systems NW of Scotland, Iceland and S tip of Greenland. HP 1028-1030 hpa, Azores to C Europe. Light rain overnight 23rd and 24th with showers 24th midmorning. 26th: High 1030-1035 hpa, Azores to Russia, weakening over France. Low 961 hpa, Norwegian Sea, filling slowly, warma nd cold fronts give a dismal and damp day.
27th - 31st

Extended LP area 990-995 hpa, North Sea to Norwegian Sea, filling slowly. Passage of fronts with Polar Maritime air behind on 28th giving snow and sleet further north and west but dry here. 29th: Deepening LP towards 990 hpa over Western British Isles, diving S. Rain showers overnight 30th/31st: Extended LP area over W Europe. Minimum 995 hpa, W of Bordeaux.

OCTOBER 2008 MONTHLY SUMMARY
ACTUAL TEMPERATURE
 AVERAGE
 Daily Maximum
14.1
  ºC ( -0.9C )*
 Daily Minimum
6.2
  ºC ( -2.0C )*
 Daily Mean
9.7
  ºC ( -1.1C )*
 EXTREMES
 High Maximum
22.6
  ºC ( 12th )
 Low Minimum
-0.8
  ºC ( 25th)
 Low Maximum
7.1
  ºC ( 29th)
 High Minimum
13.1
  ºC ( 26th)
 
   
 Days with max => 20 °C
1
    
 Days with Air Frosts
2
    
 
   
 
PRECIPITATION
 Monthly Total
45.5
  mm ( 54% )*
 Days with measurable precip
15
  Days ( ±0 )*
   ...of which, days with >= 1.0 mm
10
  Days ( -2 )*
   ...and days with snowfall observed
0
  Days  
 Days with Snow Cover
0
  Days  
 Days with Thunder
0
  Days  
 RAIN RATE & EXTREMES
 High Rain Rate
32.8
  mm/hr ( 20th )
 High Rain Total in 1 day
12.2
  mm (   5th )
 High Rain Total in 1 hour
2.3
  mm (   5th, 12.05h)
 EVAPO-TRANSPIRATION
 Total for month
36.3
  mm  
 High Total for 1 day
2.0
  mm ( 1st )
APPARENT TEMPERATURE
 Low Wind Chill
-0.8
  ºC ( 29th )
 DAVIS HEAT INDICES THW & THSW
 Low Temp/Hum/Wind Index
-0.8
  ºC ( 29th )
 High Temp/Hum/Wind Index
22.6
  ºC ( 12th )
 High Temp/Hum/Sun/Wind Index
27.7
  ºC ( 12th )
 
DEWPOINT & HUMIDITY
 High Dewpoint
15.0
  ºC ( 12th )
 Low Dewpoint
-4.3
  ºC ( 29th)
 Average Dewpoint at 14h
7.0
  ºC  
 Low Relative Humidity
42
  % (   1st )
 Average RH at 14h
66
  %  
WIND SPEED & DIRECTION
 Monthly Average
2.0
  mph  
 Windiest day (Average)
4.9
  mph ( 5th )
 Highest Gust
28
  mph ( 4th )
 Dominant Direction
SSW
  ( 50%)
 
BAROMETER
 Monthly Mean
1014.0
  hPa  
 High Barometer
1032.4
  hPa ( 9th )
 Low Barometer
992.9
  hPa ( 5th )
SUNSHINE
 Max Sensor Exposure to direct sun
8
  hours/day (8.5 - 11 possible)
 Calculated Monthly Sunshine Hours
94.1
  hours  
 Estimated Actual Hours (approx)
125.0
  hours  
 Sunniest Day Measured
7.8
  hours ( 8th)
 Days with no sunshine
3
  Days  
 
FOG
 Number of Days with Fog
5
  Days  
NEW RECORDS SET THIS MONTH
  • Lowest October daytime maximum temperature 7.1 °C (29th)
* deviation from average 1984 - 2007
‡ 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 approx 70% 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
   DAILY STATS OCTOBER 2008
 
TEMPERATURE ºc
HUMIDITY
SUN ‡
PRESSURE
RAINFALL
WIND SPEED
DIRECTION
DATE
Minimum
(21-09h)
Maximum
(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)
High Gust
(mph)
Dominant
(Compass)
                     
1st
 11.2 15.1 12.9 64 6.3 4.3 1000.3 RS 1.5 4.1 22 SSW
2nd
 6.4 13.3 12.3 54 3.2 4.3 1002.9 RS 0.0 2.2 14 SSW
3rd
 5.5 10.7 9.9 64 3.4 0.3 1012.4 R 0.3 2.8 22 N
4th
 1.2 13.3 11.6 79 8.0 1.2 1010.6 F 2.0 3.7 28 SSW
5th
 11.1 16.1 15.9 91 14.4 0.2 993.5 FS 12.2 4.9 27 SSW
6th
 8.1 14.6 13.9 73 9.2 1.8 1012.1 ST 0.0 0.5 8 SE
7th
 11.9 17.2 16.9 82 13.8 0.3 1004.0 F 5.6 2.9 21 SSW
8th
 7.2 16.1 15.8 56 7.1 7.8 1019.4 RS 0.0 0.7 10 SSW
9th
 3.6 17.1 17.1 52 7.1 6.8 1031.0 ST 0.0 0.8 10 SSW
10th
 6.4 17.5 17.2 55 8.0 5.8 1028.1 FS 0.0 1.8 17 SSW
11th
 3.6 18.8 18.8 60 10.8 6.2 1024.9 FS 0.3 0.5 11 SSW
12th
 9.3 22.6 22.4 57 13.5 4.7 1021.7 F 0.0 0.3 10 SE
13th
 9.6 17.7 16.6 80 13.1 0.8 1015.7 ST 0.3 1.0 12 SSW
14th
 7.9 14.7 14.4 79 10.8 0.3 1018.6 F 0.0 1.1 11 SSW
15th
 12.9 14.9 14.6 88 12.6 0.0 1009.5 FS 1.3 3.1 17 SSW
16th
 9.1 13.5 12.3 49 1.9 5.5 1014.4 RS 0.0 1.9 17 SSW
17th
 4.2 14.1 13.6 54 4.5 4.5 1019.3 FS 0.0 0.6 8 SSW
18th
 4.7 15.3 15.1 54 5.8 5.5 1017.3 ST 0.0 1.3 13 SSW
19th
 3.4 14.6 14.6 56 5.9 2.7 1017.0 F 0.0 2.3 24 SSW
20th
 11.2 14.2 14.2 83 11.4 0.0 1005.1 F 8.6 4.5 21 SSW
21st
 7.9 12.8 12.6 54 3.5 4.7 1012.1 RS 0.8 2.0 13 SSW
22nd
 0.8 13.1 12.4 58 4.4 3.8 1021.7 RS 0.0 0.6 14 SSW
23rd
 2.7 13.7 13.1 73 8.4 0.5 1019.5 F 0.5 3.3 25 SSW
24th
 11.9 13.2 12.4 62 5.4 2.8 1022.0 RS 1.0 2.5 20 SSW
25th
 -0.8 13.8 13.3 69 7.8 2.5 1025.7 F 0.0 3.0 22 SSW
26th
 13.1 14.4 12.6 91 11.2 0.0 1013.9 FS 5.3 4.0 25 SSW
27th
 5.8 10.6 9.5 55 0.9 3.8 1007.6 F 0.0 0.9 11 SSW
28th
 1.4 9.3 8.8 60 1.4 4.5 1008.1 F 0.0 1.0 13 SSW
29th
 0.6 7.1 6.9 53 -2.0 2.5 1004.7 F 0.0 1.0 13 N
30th
 -0.4 7.5 6.9 69 1.6 3.3 995.7 RS 4.8 0.9 12 N
31st
 1.6 8.9 7.9 67 2.2 2.7 1005.8 ST 1.0 1.3 11 N
                       
‡ 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 approx 65% 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