December 26th 07, 11:28 PM
posted to uk.sci.weather
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First recorded activity by Weather-Banter: Jan 2007
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Very cold easterly in the New Year?
"Will Hand" wrote in message
...
All models (including GFS ensembles) apart from GFS main develop a
Scandinavian
high over the New Year. A deep low coming out of Newfoundland in T+48 to
T+72
range has been consistent from 5 days ago and is now expected to deepen
more
than in earlier runs. This is in area of anomously very warm Atlantic
water and
will throw up a lot of tropical low PV air northwards, helping to
intensify a
ridge over the UK this weekend and later build a cold Scandi high linking
in to
a high further east. Unlike our last high pressure this would be a genuine
easterly, not too cold at first but turning significantly colder as 492DAM
air
advects south from the pole. Details unclear obviously but a potential
colder
spell than last time is on the cards at the beginning of 2008. With the
high
further north the potential for snow is higher too.
Confidence in build of high pressure over UK 90%
Confidence in the subsequent cold easterly 60%.
Will.
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Forget the Scandi High, Will, you're being selfless. What you want is more
low pressure. (See Feb 18th, 1978) ;-)
Dave
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