Storm Forecast Issued: 2009-06-26 19:38:00
Valid: 2009-06-27 00:00:00 - 2009-06-27 23:59:00
Regions Affected
Northern Ireland, Southwest Scotland, Northern England, The Midlands, East Anglia, much of Wales (southern Scotland, southern England and much of Ireland are included in the WATCH )
Synopsis
The band of rain over north Wales at the start of this forecast, with embedded cells at times, will continue to drift northwestwards across the Irish Sea towards Northern Ireland during the early hours, but dissipating all the while. The UK is then left within a slack airflow, with High pressures to the north and south of the UK, and in a humid and very warm air mass. Daytime heating and local convergence zones will play a major part in breaking out showers and thunderstorms during the day. Due to the virtually negligible winds, the showers and storms will be very slow moving and may cause local flash flooding. Lightning, thunder and hail may accompany some of the showers, along with local gusty winds. The showers and storms are expected to decrease in coverage during the evening, but may persist until the late evening in some parts.