VALID 06:00 UTC Wed 17 Aug 2016 - 05:59 UTC Thu 18 Aug 2016

ISSUED 13:27 UTC Tue 16 Aug 2016

ISSUED BY: Dan

Plume of high low-level WBPT will gradually nudge northeastwards with time through Wednesday, from Ireland into Wales/SW England while being stretched to the SE (towards France) overnight as upper heights rise. The proximity to the forward side of the Atlantic frontal boundary and upper forcing may allow elements of medium-level instability to be released in a rather sporadic nature, with scope for pockets of embedded lightning possible. This potential is perhaps greatest late afternoon into the evening over the Celtic Sea / SW England / SW Wales / W Channel, but gradually decreases and exits into northern France during Wednesday night.