A yellow weather warning has been issued for thunderstorms in Northern Ireland.
The current warning from the Met Office is in place from 8pm on Sunday, September 4, until 4am on Monday, September 5.
The weather forecaster said there may be travel disruption caused by the storms, with poor driving conditions likely and some localised flooding and impacts on power services.
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The yellow warning also covers parts of England and Wales.
In a statement, the Met Office said: "Heavy showers and thunderstorms are expected to develop across southwest England on Sunday evening and move north across parts of Wales and Northern Ireland, clearing during the early hours of Monday morning.
"A separate area of thunderstorms is likely to develop across central southern England late evening, moving north into the Midlands overnight. Whilst some places may not see much rainfall, a few places may see 20-30 mm fall in under an hour.
"Frequent lightning, hail and locally gusty winds are additional hazards that may accompany stronger thunderstorms, particularly across southwestern parts of England and Wales."
It comes after the Met Office issued a separate yellow weather warning on Saturday for heavy rain, which was in place until 11am on Sunday.
To report flooding problems on roads or burst water mains and blocked drains, you can call the Northern Ireland flooding incident line on 0300 2000 100. This is a non-emergency number, if you are in danger, call 999.
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