The Met Office has issued a yellow warning for rain for much of the country for tomorrow (Tuesday) and Wednesday.
Covering all but London and Southeast England, the weather warning is in place from 5pm on Tuesday, until 6pm on Wednesday.
The warning states: “Thunderstorms breaking out over parts of Northern Ireland later on Tuesday are expected to extend northeast to affect parts of Scotland overnight and into Wednesday morning. There is also potential for some severe thunderstorms to develop across Wales, northern England and the Midlands. Here, the risk is greatest during Wednesday, by which time the risk of storms will be reducing across the west of the yellow area - and then finally also reducing across the east of the area by Wednesday evening.
“Whilst most places will miss the worst, please be aware of the risk of flash flooding. Frequent lightning, large hail and strong winds could be additional hazards. All of this could lead to some flooding of homes, businesses and transport networks. Disruption to power is also possible.”
The Chief forecast assessment said: “Very warm, moist air spreading north and northeast across the western side of the UK is expected to produce thunderstorms later on Tuesday, then transfer eastwards during Wednesday. Rainfall will be very variable, and the extent of thunderstorms is uncertain, but some places could see around 30mm in an hour and more than 50mm in a few hours.”