Although the month started and ended with mild, unsettled
SW-lies, there was a long anticyclonic period between the
11th and 24th which more than offset the less settled spells.
Circulation-wise, it was not an exceptional month, but it
was more southwesterly than usual with a marked anti-
cyclonic bias. The westerly, southerly and anticyclonic
circulation indices were all in the top 33%.

Mean pressure charts are available at:
Charts: http://www.climate-uk.com/monpre/0712.htm
The Monthly Review will shortly be uploaded to:
http://www.climate-uk.com/monthly/0712.htm
Graphs: http://www.climate-uk.com/graphs/0712.htm and
http://www.climate-uk.com/graphs/200712.htm
Not The Long Range Forecast should be available on 4th Jan on:
http://www.climate-uk.com/page4.html

The mean sea-level chart is dominated by a broad SW-ly flow
extending across the Atlantic and northern Europe from about
longitude 40degW and deep into the Russian Arctic. The Icelandic
low is much deeper than usual at 987mbar in the Denmark Strait,
and there is a second centre of 995mbar near Novaya Zemlya.
High pressure extends from south of the Azores across Spain and
France to Ukraine and beyond, with centres of 1026mbar over
western Spain and southwestern France, but there is a cut-off low
in the central Mediterranean.

The sea-level pressure anomaly field has below-normal pressure
over much of the northern Atlantic, Iceland, Greenland, and the
Norwegian/Russian Arctic. Pressure is above normal over
practically the whole of Europe, and also over New England and
the Canadian Maritimes.

The main anomaly centres we
- 13mbar over SE Greenland
+ 8mbar over Belarus
+ 7mbar over western France
+ 6mbar over New England

Over the British Isles pressure anomaly ranged from +1mbar
in the Western Isles to +6mbar in Kent and Sussex; the anomalous
flow over the British Isles is SSW-ly.

CET (after Manley) 4.93°C (-0.2 degC wrt 1971-2000)
CET (after Hadley) 4.9 or 5.0°C (-0.1 or -0.2 degC)
E&W Rain (provisional): 83.0mm ( 82% of 1971-2000 mean)
E&W Sunshine (prov): 56.8 hr (119% of 1971-2000 mean)

CScotT: 4.5°C ( 0.0 degC)
ScotRain: 84mm ( 74%)
ScotSun: 49hr (152%)

NIT: 6.6°C (+0.4 degC)
NI Rain: 78mm ( 77%)
NI Sun: 46hr (104%)

Rainfall totals ranged from 370mm at Capel Curig (Snowdonia)
to 21.6mm at Shoeburyness (Essex)

Percentages ranged from 167 at Shap (Cumberland) to
37 at Leuchars (Kingdom of Fife)

Sunshine totals ranged from 89.0h at East Malling (Kent) -
presumed KZ sensor - to 25.5h at Lerwick (KZ sensor).

Percentages ranged from 239 at Kirkwall (Orkney)
to 68 at Watnall (Notts)

(c) Philip Eden