Met Office storm warning: New alert as heavy showers and lightning to thrash UK in HOURS

BBC Weather: UK set for cooler temperatures and rain

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The warning, in place from tomorrow between 10am and 10pm, covers a large swathe of the south west, but stretching as far east as Brighton in West Sussex. It says there is a “slight chance” of power cuts to homes and businesses, with flooding and lightning strikes causing imminent delays and cancellations to public transport. Spray and sudden flooding could also make driving conditions difficult, causing road closures in some instances. It is the Met Office’s second warning this week for thunderstorms, which have began sweeping in after a period of intense heat, where the top temperature was reached in Lincolnshire at 40.3C.

A statement from the Met Office reads: “While some areas will remain dry, slow moving, heavy thunderstorms are likely to develop from mid to late morning, likely peaking during the afternoon and early evening before decaying later.

“Where thunderstorms do occur, 20-25 mm of rain is possible in less than an hour, and 40-50 mm could fall in 2 or 3 hours.

“Hail and frequent lightning are potential additional hazards.”

The warning covers 16 local authority areas in Wales, 12 in the south west, seven in the south east and Herefordshire in the West Midlands.

The 12 hour warning is the only one activated at the moment, but WX Charts shows there is a chance of more heavy rain over the south west this weekend. 

The daily forecast from the Met Office shows those living in Bristol and south Wales may experience rain from around noon and 3pm, but this is subject to change.

In Cardiff, the most intense period of rain is set to be between 2pm and 3pm. 

Temperatures look set to peak at a cool 19C.

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