VALID 06:00 UTC Fri 24 Jun 2016 - 05:59 UTC Sat 25 Jun 2016

ISSUED 21:16 UTC Thu 23 Jun 2016

ISSUED BY: Dan

Upper trough will slide slowly SE-wards across British Isles through Friday, accompanied by cool mid-levels steepening lapse rates when combined with diurnal heating. Scattered showers and a few thunderstorms will develop during the day, becoming more numerous through the afternoon and early evening in an environment yielding 200-300 Jkg^-1 MLCAPE over Britain, and 400-600 Jkg^-1 MLCAPE over Ireland. Given relatively slack surface flow, multiple zones of low-level convergence (combined with some orographic uplift) will provide the main focus for showers and thunderstorms, and perhaps a couple of funnel clouds.