VALID 06:00 UTC Wed 04 Sep 2019 - 05:59 UTC Thu 05 Sep 2019

ISSUED 05:28 UTC Wed 04 Sep 2019

ISSUED BY: Dan

Broad upper trough will migrate eastwards across the British Isles on Wednesday, with a couple hundred J/kg CAPE developing in response to warm SSTs and diurnal heating inland. Various areas of showers will tend to develop behind the cold front which will clear SE England late morning, but for most areas the depth of convection will be too shallow, and instability too weak, to produce much in the way of lightning. There will also be some longer spells of rain at times across Scotland in particular as the wrap-around occlusion slides eastwards.