Storm Forecast Issued: 2010-09-11 00:54:00
Valid: 2010-09-11 00:00:00 - 2010-09-11 23:59:00
Regions Affected
Scotland, Northern Ireland, Ireland, Wales, N England and Midlands ( all of the United Kingdom is included in the WATCH )
Synopsis
Complex area of Low pressure "Gloria" (FU Berlin) located over Iceland will dominate the weather across the United Kingdom on Saturday.
To the north of a waving cold front, which will slowly and erratically sink southeastwards during the forecast period, a cold rPm airmass is advected across many parts of central and northern UK.
Widespread showers are forecast to readily develop during the morning, with a reasonable chance for quite a few pulse-type thunderstorms during the afternoon across highlighted regions. Light upper level winds will ensure showers will be slow-moving, and thus flash flooding may be a primary concern. Also, given the airmass, hail is likely in many of the showers, and in any stronger storms, particularly over Ireland and Northern Ireland, the hail may be locally moderate in size (diameter up to 3cm).
During the evening hours the showers are expected to shrink rapidly to coastlines, though the northwesterly prevailing wind will blow them a reasonable distance inland during the overnight period.