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graphs CLIMATE-UK.COM'S REVIEW OF THE BRITISH METEOROLOGICAL SCENE
MONTHLY SUMMARY
No. 683 For NOVEMBER 2012
MOSTLY RATHER COLD AND CHANGEABLE; EXCEPTIONALLY WET FOURTH WEEK
Text Box: Pressure was quite high over southern Britain between the 6th and 8th and from the 12th to the 16th, otherwise low pressure dominated November. Anomalies ranged from  -7 mbar in the Western Isles to -4.5 mbar in Kent and southwest Ireland. Rain fell frequently and often heavily between the 20th and 27th, triggering widespread and repeated flooding.

For the first five days of the month a complex depression lay over the UK. Frost developed widely in Scotland early on the 1st with a minimum of -6.4C at Kinbrace (Sutherland). There was a good deal of rain on the 4th as a secondary depression tracked quickly northeast across southern districts, and snow fell in many upland parts of the West Country and south Wales for a time. The day's high was just 2.2C at Leeming (N Yorks). Nevertheless there were also good sunny spells, especially on the 2nd and the 5th. A ridge of high pressure extended across southern districts from the 6th-8th, but westerlies affected central and northern Britain and temperatures climbed to 14C locally in eastern Scotland on the 7th while East Malling (Kent) enjoyed 8.7h of bright sunshine. Meanwhile, western upslopes were very wet, and 95mm fell at Cluanie Inn (Wester Ross) in 72h from the 6th to the 8th. Winds backed southwesterly on the 9th and 10th, and there was further rain at times, especially in western Scotland.

The period 12th-17th was the warmest part of November with a broad southwesterly flow covering the British Isles, and pressure relatively high over England and Wales - at least until the 15th. There was a good deal of rain on some days in western and northern districts, but amounts of rain were small in the east and south. The temperature climbed to 16.4C at Kew Gardens (London) on the 13th, and to 15.2C at Hampton (London) on the 14th, but the next two days were somewhat colder with extensive fog especially over hills.
Text Box: A very disturbed south to southwesterly flow developed between the 19th and 24th; a deep depression crossed southern England on the 24th/25th followed by a further depression on the 25th/26th. During this period there were long spells of heavy rain; largest daily totals were 49mm at Murlough (Co Down) on the 18th, 51mm at Dunkeswell (Devon) on the 20th, 48mm at Shap (Cumbria) on the 22nd, 75mm at Culdrose (Cornwall) on the 24th, and 54mm at Capel Curig (Caernarfon) on the 26th. Between 150mm and 200mm fell over large parts of Cornwall, Devon, north Wales and Cumbria between the 19th and 26th. Flooding was particularly bad in Cornwall, Devon, and at St Asaph in Denbighshire, and there was wind damage too, notably on the 22nd when a gust of 75kn was registered at Capel Curig.

A cold northerly flow developed from the 27th onwards, and there were widespread night frosts with -7.3C logged at Braemar (Aberdeenshire) on the 29th, while the day's maximum on the 30th was -1.1C at Warcop (Cumbria). There were good sunny spells especially on the 29th and 30th.

Both mean maximum and mean minimum temperatures were between 0 and 1 degC below the 1981-2010 normal, with the biggest negative anomalies in Northern Ireland, northwest England and Wales. The first half of the month was moderately dry, and in eastern Scotland and Northern Ireland rainfall totals for the whole month were 20-40 per cent below the long-term mean. Elsewhere, though, it was a wet month with percentages approaching 200 locally in the Midlands and the West Country. Highest total to hand was 334mm at Cluanie Inn whereas only 26mm fell at Kinloss (Moray). It was a fairly sunny month over much of the UK with 97h of bright sunshine recorded at East Malling (Kent).
                                                                                                                                             
    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   09.7   -0.2   04.7   +0.4   14.5   13   -02.3   01   14   03   07   07.1   11   070   101   1910   109   1989   030   1932   09   16.1   24   084   110   1910   183   2002   05   1945   00   00   00  
  *Thorney Island   10.8   -0.4   05.1   -0.5   13.7   08   00.4   01   11   02   05   06.8   11   080   104   1958   135   2006   038   1994   10   15.4   25   103   115   1941   205   1970   07   1945   00   00   00  
  *Wattisham   09.5   +0.2   04.2   +0.6   14.4   13   -01.1   01   11   05   10   08.3   11   080   113   1968   114   1989   041   1983   06   10.6   04   054   096   1960   156   1970   19   1978   00   00   01  
  *Wittering   09.1   0.0   04.2   +0.1   13.8   13   -00.6   30   12   06   09   07.6   05   067   093   1950   114   2006   038   1968   12   25.2   24   090   146   1945   131   1970   11   1945   00   00   01  
                                                                     
  *Lyneham   08.9   -0.8   04.1   0.0   13.7   13   00.2   01   11   03   06   08.0   11   069   088   1952   105   1971   026   1994   07   20.6   24   121   140   1945   145   1951   10   1945   00   00   02  
  Ross-on-Wye   10.5   +0.5   04.0   -0.6   15.0   20   -04.4   30   12   07   01   06.4   11   072   102   1914   108   1923   025   1945   13   20.6   24   084   108   1859   227   1929   11   1945   00   00   00  
  *St Athan   10.4   +0.2   05.8   +0.2   14.5   20   -00.5   30   07   04   09   06.9   05   060   080   1954   106   1971   034   1994   09   29.6   24   150   135   1954   215   1970   32   1956   00   00   00  
  Culdrose   11.0   -0.4   06.7   -0.1   13.1   13   02.0   01   08   00   10   07.0   14   081   102   1960   119   1990   034   1981   10   74.9   24   180   145   1960   259   2002   37   2004   00   00   00  
                                                                     
  *Edgbaston   08.6   -1.0   04.6   -0.3   13.4   20   -00.5   30   08   01   01   05.8   05   064   092   1887   099   1977   014   1912   12   33.0   24   106   145   1887   198   1951   17   1920   00   00   02  
  *Valley   10.1   -0.7   06.4   -0.4   13.2   12   01.0   29   06   01   09   06.3   15   062   088   1946   089   1989   032   2004   04   45.8   22   149   130   1941   219   2000   27   1983   00   00   00  
  *Woodford   09.0   +0.1   03.1   -0.7   14.6   20   -02.2   29   19   05   03   05.8   05   062   093   1945   089   1975   024   1946   06   17.6   24   075   089   1942   179   2000   11   1945   00   00   01  
  *Watnall   08.9   -0.2   04.2   +0.1   13.7   20   -01.3   01   10   05   11   07.0   05   064   088   1948   101   2005   031   2002   13   34.6   24   102   164   1942   145   1951   07   1945   00   00   02  
                                                                     
  *Leeming   09.2   -0.1   03.2   -0.6   14.4   20   -04.0   30   15   10   09   05.3   01   060   098   1945   111   1947   027   1946   10   25.4   26   109   163   1944   161   2009   10   1945   00   00   03  
  *Boulmer   09.4   +0.3   04.2   +0.1   13.8   13   -01.6   04   13   03   07   07.7   04   088   113   1945   109   1947   025   1968   12   18.2   26   089   126   1945   186   2010   13   1973   00   00   00  
  *Eskdalemuir   07.0   -0.5   02.2   +0.2   11.4   20   -02.4   30   16   11   14   07.3   05   044   076   1911   089   1925   020   1946   02   36.8   22   239   142   1911   432   2009   18   1945   00   00   03  
  *Bishopton   08.6   -0.5   03.6   +0.3   12.8   13   -01.8   29   14   04   10   07.2   05   068   122   1921   090   1996   023   1941   02   46.2   18   176   153   1921   303   2006   08   1945   00   00   01  
                                                                     
  *Leuchars   08.7   -0.2   02.1   -1.1   14.0   13   -03.3   03   21   09   08   07.6   01   082   104   1922   109   1947   033   1968   14   12.4   22   045   066   1922   194   1963   11   1942   00   00   01  
  *Dyce   08.6   +0.1   02.5   -0.3   13.9   13   -02.9   12   23   08   07   06.6   18   079   114   1941   097   1996   023   1941   10   06.6   24   048   056   1941   268   1984   19   1964   00   00   01  
  *Stornoway   08.4   -0.6   04.3   0.0   11.7   19   01.2   01   11   00   07   04.3   01   041   084   1880   073   1968   019   1881   01   13.4   18   130   093   1943   228   1981   24   1945   00   00   00  
  *Aldergrove   08.5   -0.8   03.8   -0.5   14.0   13   -01.0   24   14   03   09   06.6   27   065   111   1927   083   2010   026   1962   05   13.0   18   059   076   1927   158   2002   15   1942   00   00   01  
                                                                     
                                                                                                                                             
  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.