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graphs CLIMATE-UK.COM'S REVIEW OF THE BRITISH METEOROLOGICAL SCENE
MONTHLY SUMMARY
No. 623 For NOVEMBER 2007
A FAIRLY QUIET MONTH; WET SPELL 17TH-21ST OTHERWISE LARGELY DRY
Text Box: Anticyclonic and northwesterly types dominated the UKs weather during November. Sea-level pressure was well above normal over the entire British Isles with anomalies ranging from +5mbar in Shetland to +9mbar in western Ireland; the anomalous flow was northerly.

From the 1st to the 4th an anticyclone lay over Britain, moving to a position in the Southwest Approaches on the 5th where it remained for about a week. This allowed a north-westerly flow to develop over the country with disturbances tracking from Iceland to the southern Baltic; one of these became a very vigorous depression as it passed northern Scotland on the 8th. The anticyclone moved back to the UK on the 14th/15th, thence slipping into France before retreating towards eastern Europe.

Until the 4th the weather was mostly dry with sunny periods over much of the UK, and it was rather warm too; at Dyce (Aberdeenshire) the minimum on the morning of the 1st was 14.5C, while a maximum of 18.2C was recorded at Kew Gardens (London) on the 1st and again at Portland (Dorset) on the 2nd. Portland also logged 8.4h of bright sunshine on the 2nd. Temperatures returned to near normal behind a cold front on the 5th which was a cloudy day, but the 6th was mostly sunny. On the 8th the westerly wind reached severe gale force in the extreme north of Scotland with peak gusts of 69kn at Lerwick and 81kn at Fair Isle, and another cold front advanced south-eastward across the country bringing light rain to all areas: at Waddington (Lincs) and Wittering (Cambs) this was the first significant rain for 23 days. The westerly flow soon veered north-northwesterly, producing a major storm surge in the North Sea. Coastal flooding, however, was very limited. Most parts of the UK became cold from the 12th onwards with widespread night frosts, although days were often sunny - St Mawgan (Cornwall) recorded 8.7h of sunshine on the 15th. Also on the 15th, fog persisted for much of the day in the Welsh Marches, and Ross-on-Wye (Herefs) recorded a maximum of just 2C for the day. Notable minima during this
Text Box: period included -6.2C at Shap (Cumbria) overnight 11th/12th and -6.4C at Sennybridge (Brecon) on the 15th/16th. 

A deepening depression moved southwards across the UK on the 17th/18th, and from then until 21st a low complex lay over the British Isles. Pressure rose strongly ahead of a ridge of high pressure on the 22nd/23rd, but a changeable westerly type held sway for much of the last week.

Rain fell widely and often heavily on each day from the 17th to the 21st; highest daily falls included 43.0mm at Shap (Cumbria) on the 17th, 44.4mm at Pershore (Worcs) on the 18th, and 41.4mm at Fyvie (Aberdeenshire) on the 21st. On the 18th it was cold enough for snow to fall for a time over much of the Midlands, Wales and northern England with temporary accumulations that evening of 2-4cm. That days maximum at Thorncliffe (Staffs) was just 2.2C, but the next few days were milder. An incursion of Arctic air on the 22nd/23rd brought snow showers to Scotland and northern England, and the temperature fell to -7.8C at Saughall (Ayrshire) on the morning of the 23rd and to -6.6C at Benson (Oxon) the next morning. The maximum at Lerwick (Shetland) on the 25th was just 1.0C. The closing days of November were changeable with occasional rain, heaviest in the north and west, and it became very mild on the 30th when the temperature reached 15C locally.

Mean maximum temperature was around 1 degC above the 1971-2000 mean in all regions, but mean minima ranged from 2.5 degC above in parts of Scotland and Northern Ireland to exactly normal in most of the English regions. Rainfall was above average only in northern and eastern Scotland (by 10-20 per cent), and there was less than half the normal amount in much of East Anglia, the east Midlands, and the West Country. Sunshine totals ranged from 30-40 per cent above normal over most of eastern England to 40 per cent below in parts of western Scotland and Northern Ireland.
                                                                                                                                             
    TEMPERATURE   SUNSHINE   RAINFALL        
                                                                                                                                     
                                                                                                                                     
                                  Highest and lowest totals             Highest and lowest totals        
                                  on record for month    
Maximum fall in 24 hrs
   (beginning 09 h)
        on record for month    
Days with snow or sleet
 
Days with fog
(Vis <220 yards at 09 h)
 
                                                                                         
     
Difference from average
   
Difference from average
 
Highest maximum
   
Lowest minimum
   
No. of days with grass
  minimum below 0C
   
Days of no sunshine
 
Maximum duration
       
First year of record
         
Days of no rainfall
 (0.1 mm or less)
         
First year of record
         
Days with thunder
     
  PLACE  
Mean Maximum
   
Mean minimum
             
No. of air frosts
       
Total for month
                   
Total for month
                   
                               
% of average
                   
% of average
                 
                                                                     
                                   
Highest
   
Lowest
 
Year
             
Highest
   
Lowest
 
Year
       
             
Date
   
Date
         
Date
         
Year
         
Date
         
Year
           
                                                                     
    C     C     C     C           Hrs     Hrs       Hrs     Hrs       mm     mm       mm     mm          
                                                                                                                                             
  *Hampstead   10.8   +1.0   04.6   +0.4   17.7   01   -02.3   24   11   03   04   07.1   06   091   140   1910   109   1989   030   1932   14   27.7   20   077   108   1910   183   2002   05   1945   00   01   00  
  Thorney Island   11.8   +0.7   05.4   -0.1   17.3   01   -03.5   16   08   04   04   07.7   15   106   147   1958   135   2006   038   1994   11   22.3   18   082   100   1941   205   1970   07   1945   00   00   00  
  *Wattisham   09.6   +0.4   03.6   +0.1   16.3   02   -03.2   24   15   05   05   08.1   09   077   117   1968   114   1989   041   1983   09   07.4   20   036   069   1960   156   1970   19   1978   00   01   00  
  *Wittering   10.2   +1.2   04.3   +0.3   16.9   01   -02.7   24   11   04   05   07.8   06   075   111   1950   114   2006   038   1968   15   16.4   18   038   064   1945   131   1970   11   1945   00   01   00  
                                                                     
  Lyneham   10.1   +0.5   04.3   +0.3   15.9   01   -03.2   24   13   04   06   08.0   12   089   124   1952   105   1971   026   1994   17   08.4   30   034   043   1945   145   1951   10   1945   00   01   00  
  Ross-on-Wye   11.3   +1.4   03.4   -1.1   17.0   01   -04.0   16   00   05   06   07.9   02   075   113   1914   108   1923   025   1945   15   15.9   18   051   070   1859   227   1929   11   1945   00   01   00  
  *St Athan   11.2   +1.1   06.2   +0.7   15.2   01   -02.6   24   08   02   05   06.9   15   065   092   1954   106   1971   034   1994   16   18.4   01   069   066   1954   215   1970   32   1956   00   00   00  
  St Mawgan   11.7   +0.7   07.7   +0.9   14.6   01   00.3   24   05   00   04   08.7   15   066   088   1945   115   1989   036   1994   11   15.6   17   083   073   1944   236   2002   34   1945   00   00   00  
                                                                     
  *Edgbaston   09.7   +0.2   05.1   +0.3   16.1   02   -00.7   24   17   01   03   06.3   05   049   077   1887   099   1977   014   1912   16   30.7   18   060   087   1887   198   1951   17   1920   00   01   00  
  *Valley   11.7   +1.0   08.1   +1.4   16.0   01   00.2   24   03   00   06   05.8   06   053   080   1946   089   1989   032   2004   07   29.8   17   090   083   1941   219   2000   27   1983   00   00   00  
  *Woodford   10.1   +1.3   04.3   +0.6   15.8   01   -04.3   12   11   06   12   07.7   15   051   082   1945   089   1975   024   1946   11   15.6   28   068   084   1942   179   2000   11   1945   00   00   00  
  *Watnall   09.9   +0.9   04.6   +0.6   16.6   02   -02.1   24   13   02   06   07.6   15   066   099   1948   101   2005   031   2002   13   32.4   18   063   106   1942   145   1951   07   1945   00   01   00  
                                                                     
  *Leeming   10.6   +1.4   04.4   +0.7   16.9   02   -03.5   24   13   04   06   07.4   09   071   125   1945   111   1947   027   1946   14   12.0   20   057   090   1944   149   1951   10   1945   00   01   01  
  *Boulmer   10.4   +1.4   05.6   +1.6   17.1   02   -00.8   24   01   01   07   06.7   16   067   093   1945   109   1947   025   1968   12   17.2   20   082   123   1945   163   1984   13   1973   00   00   00  
  *Eskdalemuir   08.5   +1.1   03.6   +1.7   14.9   02   -05.3   24   14   05   12   06.6   23   040   073   1911   089   1925   020   1946   07   36.0   17   124   077   1911   297   1938   18   1945   00   01   00  
  *Bishopton   09.5   +0.5   05.5   +2.3   15.3   02   -03.4   12   06   03   09   05.8   23   051   099   1921   090   1996   023   1941   04   26.8   21   113   103   1921   303   2006   08   1945   00   01   00  
                                                                     
  *Leuchars   09.8   +1.0   05.0   +1.8   17.1   02   -00.7   12   16   02   08   06.5   07   070   095   1922   109   1947   033   1968   16   13.2   21   064   101   1922   194   1963   11   1942   00   00   00  
  *Dyce   09.3   +0.9   04.5   +1.8   17.6   02   -00.3   17   13   01   11   06.5   16   061   096   1941   097   1996   023   1941   07   25.8   21   119   144   1941   268   1984   19   1964   00   02   00  
  *Stornoway   09.3   +0.4   05.7   +1.5   14.3   02   -00.5   23   05   01   12   03.3   05   020   043   1880   073   1968   019   1881   04   12.8   04   110   083   1943   228   1981   24   1945   00   01   00  
  *Aldergrove   10.1   +0.9   06.6   +2.4   15.8   01   -00.5   12   03   02   09   05.8   23   033   060   1927   083   1986   026   1962   06   09.6   17   051   069   1927   158   2002   15   1942   00   00   00  
                                                                     
                                                                                                                                             
  Stations marked with an asterisk record sunshine electronically; comparisons      
  with earlier records are therefore somewhat speculative. Thorney Island's      
  sunshine figures are made at a nearby site.