Storm Forecast
Valid: Mon 05 May 2008 06:00 to Tue 06 May 2008 06:00 UTC
Issued: Sun 04 May 2008 21:29
Forecaster: GROENEMEIJER

SYNOPSIS / DISCUSSION

Monday at 06:00 UTC... an amplifying ridge over western continental Europe is transforming into a omega blocking pattern. Height rises over southern Scandinavia ensure that stable conditions persist in these areas, whereas more unstable conditions are found on its periphery.

Great Britain...

Warm air advection in a southerly flow over the British Isles could again cause sufficient destabilization to cause thunderstorm development over western parts of England and Wales. Some small hail will be
possible here as well as localized flooding.

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Storm Forecast Issued: Sun 04 May 2008 at 22:56
Valid: 05 May 2008 at 00:00:00 - 06 May 2008 at 00:00:00

Regions Affected
Wales, Northwest England, parts of the West Midlands

Synopsis
A cold front, situated across the Midlands, Central Southern England and Northeast England at the start of this period, is expected to move very slowly eastwards for the remainder of the night. It is likely to weaken as it does so, producing drizzly rain in places. By dawn it is expected to not have moved a great deal east before it starts advancing west again, very slowly. Therefore parts of the Midlands, Central Southern England, and later in the day Southwest England, will see a few isolated showers from this front at first, but with warm air advecting from the south and temperatures rising steadily, the showers are likely to turn heavier in places with thunder and lightning possible by the end of the afternoon. Some small hail is also possible, although a tornado threat remains low. The heaviest of the showers are likely to be across the West Midlands, Wales & Southwest England during the evening, very slowly pushing westwards and dying out as the evening goes on, with the last of the showers clearing western Wales just after the end of this period.

All times are GMT+1
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