Much of Cornwall escapes but Bude is included in a Met Office weather warning for thunderstorms today.
Rain will be persistent and at times heavy in South-west England and the West Country, where 30-60 mm could fall in a few places, dying out overnight.
Further east, a few slow moving heavy showers and thunderstorms may develop, possibly producing 20-25 mm of rain within an hour.
Lightning could be an additional hazard. These will be dying out during the evening.