The Met Office have issued a yellow weather warning for Thursday with heavy rain and thunderstorms forecast.
An area of heavy and thundery rain is developing and is expected to reach southern England during the early hours of Thursday before pushing further north.
The potential of downpours is forecast in places.
Members of the public are being urged to remain aware of a significant risk of localised disruption due to surface water flooding.
Lightning and hail are also likely to be an additional hazard.