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Old February 7th 13, 10:12 AM posted to uk.sci.weather
Alan (North West Surrey) Alan (North West Surrey) is offline
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First recorded activity by Weather-Banter: Jan 2013
Posts: 43
Default Risk of widespread snow on Sunday

Will is that the same trough that slips southward past the Alps and into the Med? I'm getting quite excited about this, it could bring a good blast of Snow to the French Alps, were hopefully I'll be next week!


On Thursday, 7 February 2013 08:49:55 UTC, wrote:
I shall be pin-pointing Sunday in my weekly forecast as a potential day for

disruptive snow. Not just on hills but eventually for low-lying populated

areas too.



A major trough disruption is about to take place, all models are keen on it.

Initially the air will be too warm for lowland snow and there will be quite

a bit of rain. But as the disruption gets underway, winds will fall light as

the trough stretches and precip. will persist. The warmer air will occlude

out and in the light winds latent heat processes with melting snowflakes

will hasten a cooling process and the wet-bulb freezing level will come down

rapidly. This process most likely Sunday afternoon and evening. Sunset also

obviously aiding the temperature fall. So a period of moderate or heavy snow

in bands then slowly petering out. One to watch and one where tangerine

warnings will be issued in due course by UKMO. Who gets what and when will

have to wait of course.



Will

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http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm

Will Hand (Haytor, Devon, 1017 feet asl)

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