Storm Forecast Issued: 2009-05-18 21:40:00
Valid: 2009-05-19 00:00:00 - 2009-05-19 23:59:00
Regions Affected
Northern Ireland & Ireland (the whole of the UK is included in the WATCH region)
Synopsis
An unstable airmass continues to affect the United Kingdom during Tuesday, as a result of Low Pressure situated
to the northwest of Scotland at noon Tuesday. Showers are expected to be widespread across the whole of the united Kingdom during the morning in particular, and many are likely to be heavy and locally torrential. Gradually through the day, the showers will ease in number across southern England, but at the same time, as a result of daytime heating in particular, some of the showers may turn thundery in nature, most likely across the Republic of Ireland and Northern Ireland. Conditions are not thought to be favourable for clusters, and so any storms that do develop are likely to be isolated and perhaps short-lived. Hail and gusty winds may accompany many showers. Whilst Eire is the main area of interest, some additional instability is suggested to develop over Wales/West Midlands during the morning, which may allow isolated thunderstorms to develop here, which would then head northeastwards into Yorkshire and Lincolnshire during the late afternoon, before heading off into the North Sea during the evening. However, this remains uncertain and will need careful monitoring during the day. Any showers that do develop are expected to reduce in coverage very rapidly during the evening, with the exception of Ireland where some thunderstorms may persist for a while during the evening.
