Here's the convective forecast for Ireland & Uk - Wed. Risk map is on the link.
http://www.southweatherforum.com/storm-forecast-wednesday-20th-may-2009-t564.htmlStorm Forecast Issued: 2009-05-19 20:32:00
Valid: 2009-05-20 00:00:00 - 2009-05-20 23:59:00
Regions Affected
Northern & Eastern Scotland, Central Belt of Scotland, Northern Ireland, much of Ireland, West & East Midlands, East & South Wales and the West Country (all of the UK, excluding the Southeast, is included in the WATCH)
Synopsis
A developing area of LOW pressure approaches southern Ireland during the course of Wednesday morning. Scattered showers, some heavy, are forecast to develop in many parts of western, central and northern UK. The areas most likely to be affected are those highlighted in the THUNDERSTORM regions on the map. Hail, gusty winds and occasional lightning can be expected from many of the showers. Convergence lines may develop showers in distinct SW-NE orientated lines, particularly from the Severn Estuary to The Wash. Northern Ireland/Ireland are most favourable for thunderstorm development, but thunderstorms cannot be ruled out elsewhere due to reasonable conditions. Lighter winds will ensure any showers/storms are slow moving and so local flooding is a risk from torrential, slow-moving downpours. Whilst most showers will rapidly decrease in coverage during the evening, showery outbreaks of rain will continue to affect parts of Wales and northern England until the end of the forecast period, with a risk of thunder.
