THUNDERSTORMS look set to interrupt the sunny conditions from Thursday afternoon.
A warning from the Met Office comes as temperatures reach almost 30C across the region.
The Met Office said: "Thunderstorms may develop across parts of western UK late on Thursday afternoon and into the evening.
"A larger area of thunderstorms is then expected to move northeastwards overnight into Friday.
"Many places will miss the worst of the storms but where they do occur torrential downpours could bring 30-40 mm rain in less than two hours.
"Lightning and hail are also likely to be additional hazards."
The yellow warning is in place from 4pm on Thursday, June 25, until 9am on Friday.
The Met Office has warned that the thundery and rainy conditions could spark flooding and disruption in places.
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