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graphs CLIMATE-UK.COM'S REVIEW OF THE BRITISH METEOROLOGICAL SCENE
MONTHLY SUMMARY
No. 659 For NOVEMBER 2010
VERY MILD START; VERY COLD FINISH; PAUCITY OF WESTERLY WINDS
Text Box: Although the month began with five days of mild westerly winds, westerlies were conspicuous by their absence during the remainder of the month. The second and third weeks were often cyclonic, and the last ten days brought mainly northeasterly winds, initially rather cold, but from the 25th onwards exceptionally cold with a good deal of snow. Over the British Isles, mean sea-level pressure ranged from 1 mbar below normal in Shetland to 9 mbar below in the Channel Is.

Early fog on the 1st cleared slowly as a ridge of high pressure moved away and a strong westerly airflow became established. During the first four days of the month the heaviest rain fell in northern and western parts of the UK, and on the 2nd alone 65mm was logged at Lake Vyrnwy (Montgomeryshire) and 62mm at Capel Curig (Caernarfon). It became exceptionally mild over central and southern districts for three days, the temperature reaching 19.0C at St James's Park (London) on the 4th - the highest November reading anywhere in the UK for seven years - and falling no lower than 15.9C at Olympic Park (London) the following night. During the 5th a well-marked cold front brought several hours of steady rain to most parts of England and Wales, and the next two days were much brighter, though with some showers, and several degrees colder.

A very deep depression tracked SSE-wards across Ireland on the 8th giving nearly all parts of the UK a very wet and windy day with 55mm in 36h at Braemar (Aberdeenshire). Cold northeasterlies affected the country in the wake of the depression but it became sunny in western and southern districts on the 10th with 8.7h of bright sunshine at Teignmouth (Devon). Another deep low tracked eastwards across Scotland on the 11th/12th bringing widespread rain - 66mm in 48h at Tyndrum (Stirlingshire) - and westerly gales swept northern England, Wales and the Midlands, with a peak gust of 79kn at Capel Curig. Further rain affected southern
Text Box: England over the next two days, with showers in several other districts, but the 15th was a generally sunny day with fog and frost early and late.

A further deep low approached Ireland on the 16th, but its progress was blocked by high pressure over Scandinavia. Heavy rain fell in western Britain, with 79mm at Restormel (Cornwall), about half of which fell in an hour; serious but short-lived flooding affected southeast Cornwall. The next Atlantic depression headed into France on the 21st, and a northeasterly flow developed over the British Isles. At first the weather was rather cold and dull with widespread hill fog and occasional rain, although sheltered western districts enjoyed some sunshine. From the 24th onwards it became much colder and there were heavy falls of snow each day from the 25th to the 30th in eastern Scotland and northeast England with 30-40cm reported in Inverness-shire, Perthshire and Northumberland by the end of the month. Frost was very severe at night, and daytime temperatures struggled to reach zero over wide areas. The lowest night minimum was -18.0C at Llysdinam (Breconshire) early on the 28th, and the maximum reading there the following afternoon was -5.6C. These may well be the lowest November readings anywhere in England and Wales since 1890. On the 30th snow spread across the north Midlands and also southeast England, with falls of 15-20cm locally in Kent and Derbyshire; Loch Glascarnoch (Sutherland) climbed no higher than -6.7C.

Monthly mean temperature was between 1 and 2 degC below the 1971-2000 mean in most parts of the UK, and overall this was the coldest November since 1993, with only eleven colder in the last 100 years. Rainfall was 20-40% above normal in eastern Scotland, northeast England and Northern Ireland, but 20-40% below in the Midlands, East Anglia and Southeast England. Sunshine aggregates were mostly above normal, except in parts of south and southeast England, the excesses being largest in northeast England, southwest 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   07.9   -1.9   03.6   -0.6   17.5   04   -05.8   28   14   07   05   06.7   26   058   092   1910   109   1989   030   1932   14   08.1   05   039   057   1910   183   2002   05   1945   00   03   00  
  *Thorney Island   09.4   -1.7   04.6   -0.9   16.2   04   -03.0   29   11   10   01   07.8   10   067   095   1958   135   2006   038   1994   12   22.2   08   092   114   1941   205   1970   07   1945   01   01   00  
  *Wattisham   07.5   -1.7   03.0   -0.5   17.3   04   -05.8   28   14   08   08   07.3   16   049   077   1968   114   1989   041   1983   04   12.2   05   050   098   1960   156   1970   19   1978   00   04   01  
  *Wittering   07.6   -1.4   03.0   -1.0   17.3   04   -07.6   28   15   09   06   07.4   15   076   116   1950   114   2006   038   1968   13   15.0   08   043   075   1945   131   1970   11   1945   00   04   01  
                                                                     
  *Lyneham   07.7   -1.9   02.9   -1.1   16.0   04   -06.5   29   14   09   08   08.3   10   059   085   1952   105   1971   026   1994   08   12.0   05   057   072   1945   145   1951   10   1945   01   02   02  
  Ross-on-Wye   08.4   -1.5   02.1   -2.4   16.0   04   -11.2   27   15   10   09   09.1   10   059   092   1914   108   1923   025   1945   10   16.4   07   061   086   1859   227   1929   11   1945   00   02   00  
  *St Athan   09.0   -1.1   04.2   -1.3   15.1   03   -08.4   28   12   06   07   07.5   10   077   113   1954   106   1971   034   1994   05   16.4   12   082   081   1954   215   1970   32   1956   00   00   01  
  Culdrose   10.0   -1.3   05.2   -1.5   15.2   04   -06.7   28   12   06   07   07.6   15   095   131   1960   119   1990   034   1981   04   20.0   16   142   124   1960   259   2002   37   2004   01   00   02  
                                                                     
  *Edgbaston   07.3   -2.3   03.4   -1.4   15.7   04   -06.0   28   13   06   03   05.9   15   061   099   1887   099   1977   014   1912   10   08.2   07   038   057   1887   198   1951   17   1920   00   04   01  
  *Valley   09.3   -1.4   04.6   -2.1   14.6   04   -05.0   29   17   04   04   07.3   20   085   132   1946   089   1989   032   2004   02   11.8   06   086   083   1941   219   2000   27   1983   01   00   01  
  *Woodford   07.8   -1.0   01.2   -2.5   16.2   04   -10.4   28   20   10   07   07.6   19   084   139   1945   089   1975   024   1946   07   18.0   02   064   083   1942   179   2000   11   1945   00   01   02  
  *Watnall   07.3   -1.7   02.9   -1.2   16.6   04   -09.2   28   15   09   08   07.5   15   080   122   1948   101   2005   031   2002   08   17.6   08   061   107   1942   145   1951   07   1945   00   04   02  
                                                                     
  *Leeming   07.2   -2.0   02.1   -1.6   16.8   04   -08.5   28   15   10   06   06.8   06   073   132   1945   111   1947   027   1946   06   07.8   11   052   084   1944   161   2009   10   1945   01   04   02  
  *Boulmer   07.9   -1.1   03.7   -0.3   15.5   04   -01.9   27   06   04   08   07.0   13   071   102   1945   109   1947   025   1968   02   19.8   22   * 186   286   1945   163   1984   13   1973   03   05   01  
  *Eskdalemuir   05.4   -2.0   00.5   -1.4   13.2   04   -05.8   26   20   16   07   07.5   10   064   121   1911   089   1925   020   1946   04   40.8   11   198   128   1911   432   2009   18   1945   00   06   02  
  *Bishopton   07.1   -1.9   01.8   -1.4   12.9   04   -06.7   28   17   11   07   06.8   26   072   145   1921   090   1996   023   1941   10   27.2   11   121   115   1921   303   2006   08   1945   00   03   00  
                                                                     
  *Leuchars   07.3   -1.5   02.1   -1.1   12.0   02   -04.0   16   19   09   08   07.3   10   077   108   1922   109   1947   033   1968   09   18.2   28   105   169   1922   194   1963   11   1942   01   05   00  
  *Dyce   06.5   -1.9   02.0   -0.7   13.3   02   -04.0   28   10   09   08   06.9   15   059   095   1941   097   1996   023   1941   03   19.4   19   092   115   1941   268   1984   19   1964   01   05   01  
  *Stornoway   07.5   -1.4   02.6   -1.6   11.4   02   -03.7   30   17   05   07   05.4   10   050   113   1880   073   1968   019   1881   07   15.0   10   091   071   1943   228   1981   24   1945   00   02   00  
  *Aldergrove   07.5   -1.7   02.3   -1.9   14.1   04   -08.6   28   15   09   03   07.2   19   * 083   156   1927   083   1986   026   1962   04   13.6   03   106   148   1927   158   2002   15   1942   00   02   00  
                                                                     
                                                                                                                                             
  Stations marked with an asterisk record sunshine electronically; comparisons      
  with earlier records are therefore somewhat speculative. Thorney Island's   * Equals previous highest   * New highest  
  sunshine figures are made at a nearby site.