Convective Outlook: Thu 31 Aug 2017 |
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What do these risk levels mean? |
VALID 06:00 UTC Thu 31 Aug 2017 - 05:59 UTC Fri 01 Sep 2017
ISSUED 19:50 UTC Wed 30 Aug 2017
br> br>ISSUED BY: Dan
Upper trough and associated cold pool / steep lapse rates will drift gradually southeastwards across the British Isles, generating several hundred Jkg-1 CAPE. Showers will be ongoing over western areas at the beginning of the forecast period, with several high-res models suggesting a cluster of thunderstorms possible over N Wales / NW England and adjacent Irish Sea during the morning, lightning activity then becoming more widespread through the day as showers develop more widely. Late arrival of upper trough means showers may be late to arrive / develop over East Anglia and SE England, and hence linger for quite some time during the evening.