'TORRENTIAL' rain and 'lighting' could be seen across Berkshire later today.
The Met Office has issued a yellow weather warning for thunderstorms which are likely to 'intensify' across the county.
The warning will be in force between 7pm on Wednesday night and 3am on Thursday.
As much as 25mm of rainfall could be recorded in an hour with the chance of 40mm of rain in two or three hours in some places, the Met Office said.
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A Met Office spokesperson said: "Developing showers and thunderstorms are likely to intensify across parts of the warning area through the evening, before easing away eastwards after midnight.
"Quite a lot of places will probably avoid the heaviest rain and thunder, but others could experience torrential downpours and frequent lightning, while large hail and strong wind gusts may also affect a few places.
"Central parts of southern England are perhaps most likely to see impacts. Rainfall amounts will be highly variable, as is usual in such situations, but the wettest spots perhaps seeing around 25 mm of rain inside an hour, and a possibility that somewhere could catch over 40 mm in 2 or 3 hours.
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