UKww Weather Watch for Gales, Heavy Rain and Snow
Posted 04 January 2012 - 09:05
Issued Wed 04/01/2012 0900GMT
Areas affected - Gales - Scotland, Northern Ireland, Wales and England
Heavy Rain - NW & W Scotland, NW England and N Wales
Snow - N Scotland & Highlands
Valid from: 1200GMT Wednesday 4th January 2012 - 1159GMT Thursday 5th January 2012
General evolution: Shortwaves around the trough to the north of the UK is engaged by a 180kt jetstream from the northwest, developing a sub-970mb depression from the north into the North Sea and Baltic Sea overnight into Tuesday. A disturbed cold front crosses the UK from late evening moving SE overnight, ahead and along which a deep 60kt windfield develops fragmenting the front into broken areas of strongly forced convection.
As a result gales, with gusts possibly to 70kts associated with showers, may occur; more particularly across high ground and exposed coasts, although potentially further inland as a result of convective downdrafting, and Fohn effects mainly down the eastern side of Scotland, N & E England but possibly E or SE of high ground elsewhere. Intense and brief rainfall will cross most areas, except for northwestern and western coasts and over the high ground of the Highlands, Southern Uplands, Cumbria and Snowdonia where accumulations may exceed 40mm, also as a result of continuous heavy showers through into Thursday morning. Over parts of the far North and high ground of Scotland and N England, showers may turn to snow accumulating above 400m.
Please listen to local radio/television broadcasts for up to date information on travel conditions.UKww will monitor this warning and update when necessary.
Issued by GEJ for UKww, 0900GMT 04/01/2012
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The UKww Warnings Team use Net Weather Extra when compiling forecasts.