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graphs CLIMATE-UK.COM'S REVIEW OF THE BRITISH METEOROLOGICAL SCENE
MONTHLY SUMMARY
No. 611 For NOVEMBER 2006
SUNNIEST NOVEMBER EVER IN MANY PLACES; WET IN THE WEST AND NORTH
Text Box: Pressure was generally high until the 12th especially in southern Britain, but a very disturbed period followed between the 13th and the end of the month although pressure did rise sharply in the south on the 29th/30th. Mean sea-level pressure ranged from 10mbar below normal in the Western Isles to 1mbar above at Dover, resulting in an enhanced southwesterly flow over the British Isles - it was the most southwesterly November since 1992 and it ranked eighth most southwesterly in 133 years of records.

A northerly airflow covered the country as the month opened, but strongly rising pressure soon led to the establishment of an anticyclone over the British Isles. Pressure remained high over southern Britain until the 7th but a westerly flow developed further north. Sunny days and frosty nights characterised this period, although it became cloudier in northern and western districts from the 4th onwards, and morning fog developed in parts of England and Wales on the 6th, 7th and 8th. The temperature fell to -6.5C at Sennybridge (Powys) overnight 1st/2nd and to -6.6C at the same location the following night, but daytime temperatures were not so far below the seasonal average. Many places in southern England enjoyed practically unbroken sunshine daily, and the aggregate for the first week at Pendennis Point (Cornwall) was 57.2h - an average of over 8h per day. Atlantic fronts brought some rain to Scotland and Northern Ireland from the 4th onwards and it became windy at times here too; a little rain penetrated to southern England overnight 8th/9th but a broad belt of moderate to heavy rain crossed all districts on the 10th. This was the first measurable rain in parts of the Midlands and Southeast for 16 days and marked the beginning of a much more disturbed spell of weather.

From then until the 19th active frontal troughs and secondary depressions crossed the country at frequent intervals bringing some heavy falls of rain to all areas, and flooding was reported from southwest Scotland on the 15th (Threave in Galloway
Text Box: recorded 46mm), and from southeast England on the 17th where totals of 25-30mm were reported at several places. However, there were brighter interludes too and the weekend 18th-19th was particularly sunny in southern and eastern England with over 7h of bright sunshine on both days, although there was slight frost night and morning. 

Very deep Atlantic depressions tracked past our north-western seaboard during the remainder of the month, maintaining the very disturbed weather over all parts of the UK, although the last two days were fine in the south and east as pressure rose sharply over the near-continent. There were heavy falls almost daily over the western Highlands, Cumbria and Snowdonia: Capel Curig recorded 61mm on the 19th while Tyndrum (Perthshire) logged 91mm in 48h on the 19th/20th. Meanwhile on the 25th and 26th there were outbreaks of torrential rain accompanied widely by thunder and locally by hail across many southern and central districts leading to widespread though generally short-lived flooding. Small tornadoes were reported near Portsmouth on the 25th and near Aberystwyth on the 28th. Winds reached gale force at times in the west and north, with gusts to 65kn at South Uist (Western Isles) on the 30th. However, there were also some good sunny breaks, notably on the 21st, 23rd and 29th.

In spite of the cold first week, mean temperature was above long-term average practically everywhere in the UK, and by up to 2 degC in parts of East Anglia and the Southeast. This was sufficient to establish a new record for the autumn quarter, the CET of 12.5C beating the previous record held jointly by 1730 and 1731, by the wide margin of 0.7 degC. November rainfall was slightly below normal locally in eastern England, but approached three times the normal in the southwestern Highlands (where monthly totals exceeded 600mm) and parts of Clydeside. New sunshine records were established over much of eastern and central England with monthly aggregates of 100-120h, and as much as 136h at Bognor Regis (Sussex).
                                                                                                                                             
    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   12.2   +2.4   05.4   +1.2   15.6   13   -00.1   04   08   01   02   07.6   06   106   164   1910   109   1989   030   1932   11   18.5   17   099   143   1910   183   2002   05   1945   02   00   00  
  Thorney Island   12.7   +1.6   06.7   +1.2   16.1   13   -00.5   19   13   02   06   08.8   02   * 135   164   1958   125   1989   038   1994   05   14.0   17   072   090   1941   205   1970   07   1945   02   00   00  
  *Wattisham   11.0   +1.8   05.4   +1.9   14.8   15   -01.6   04   08   01   04   08.2   03   104   157   1968   114   1989   041   1983   04   15.6   22   067   131   1960   156   1970   19   1978   01   00   00  
  *Wittering   11.0   +2.0   05.0   +1.0   14.8   15   -02.1   04   09   02   00   08.4   01   * 114   170   1950   113   2005   038   1968   14   14.8   22   052   092   1945   131   1970   11   1945   01   00   01  
                                                                     
  Lyneham   10.8   +1.2   05.0   +1.0   14.2   13   -01.5   02   11   03   06   08.9   01   103   144   1952   105   1971   026   1994   12   26.6   24   117   148   1945   145   1951   10   1945   02   00   00  
  Ross-on-Wye   11.8   +1.9   04.3   -0.2   16.0   08   -03.0   03   00   05   02   09.0   01   105   159   1914   108   1923   025   1945   07   14.5   17   085   120   1859   227   1929   11   1945   01   00   00  
  *St Athan   11.9   +1.8   06.6   +1.1   14.8   15   -01.0   03   09   03   08   08.6   02   081   116   1954   106   1971   034   1994   07   23.2   24   102   100   1954   215   1970   32   1956   00   00   00  
  St Mawgan   12.3   +1.3   07.5   +0.7   14.5   15   01.7   02   05   00   05   09.4   02   105   140   1945   115   1989   036   1994   08   14.5   23   127   114   1944   236   2002   34   1945   00   00   00  
                                                                     
  *Edgbaston   10.6   +1.5   05.8   +1.4   14.0   08   00.6   02   05   00   05   07.0   01   092   145   1887   099   1977   014   1912   14   14.6   24   056   090   1887   198   1951   17   1920   01   00   00  
  *Valley   11.8   +1.1   08.2   +1.5   13.7   08   00.4   03   04   00   07   07.9   01   058   089   1946   089   1989   032   2004   09   16.0   14   128   123   1941   219   2000   27   1983   00   00   00  
  *Woodford   10.7   +1.9   04.6   +0.9   14.0   15   -04.5   02   11   04   05   08.1   01   073   123   1945   089   1975   024   1946   07   15.0   24   076   097   1942   179   2000   11   1945   00   00   00  
  *Watnall   10.7   +1.7   05.4   +1.4   13.8   15   -00.4   03   10   01   02   07.7   02   098   146   1948   101   2005   031   2002   09   15.2   22   057   100   1942   145   1951   07   1945   00   00   00  
                                                                     
  *Leeming   11.1   +1.9   04.8   +1.1   14.4   08   -03.2   03   10   04   03   08.3   02   083   147   1945   111   1947   027   1946   11   14.0   24   056   092   1944   149   1951   10   1945   00   00   00  
  *Boulmer   10.5   +1.5   05.0   +1.0   13.2   04   -00.2   19   06   01   04   07.5   03   090   124   1945   109   1947   025   1968   13   08.4   22   040   062   1945   163   1984   13   1973   00   00   00  
  *Eskdalemuir   08.6   +1.2   03.5   +1.6   11.7   10   -04.4   03   15   06   07   07.3   02   041   075   1911   089   1925   020   1946   05   38.4   10   280   182   1911   297   1938   18   1945   00   00   00  
  *Bishopton   09.7   +0.7   05.0   +1.8   13.5   06   -01.5   01   16   03   08   07.3   02   053   103   1921   090   1996   023   1941   04   35.0   30   * 303   289   1921   205   1938   08   1945   01   00   00  
                                                                     
  *Leuchars   09.8   +1.0   04.2   +1.0   13.7   05   -01.0   19   16   02   04   07.4   03   093   127   1922   109   1947   033   1968   09   15.0   15   070   114   1922   194   1963   11   1942   00   00   00  
  *Dyce   09.9   +1.5   05.0   +2.3   15.7   07   -00.8   10   10   02   07   07.2   03   085   134   1941   097   1996   023   1941   11   11.0   15   071   089   1941   268   1984   19   1964   00   00   00  
  *Stornoway   09.7   +0.8   05.6   +1.4   13.3   06   01.5   18   07   00   09   04.1   18   032   071   1880   073   1968   019   1881   03   11.8   15   122   095   1943   228   1981   24   1945   00   00   00  
  *Aldergrove   09.6   +0.4   04.9   +0.7   12.9   10   -00.9   03   08   01   08   07.8   02   073   134   1927   083   1986   026   1962   06   13.2   24   075   104   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   * New high record   * New high record  
  sunshine figures are made at a nearby site.