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Old February 7th 13, 09:29 PM posted to uk.sci.weather
Lawrence13 Lawrence13 is offline
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Default Risk of widespread snow on Sunday

On Thursday, 7 February 2013 20:09:00 UTC, Adam Lea wrote:
On 07/02/13 08:49, Eskimo Will 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




Do you think there will be much chance of any lying snow in the Surrey

hills?


I'm not Will, but there could be a flurry in Surrey with the sleet on top.