The Met Office has issued a yellow weather warning covering parts of Northern Ireland.
The thunderstorm warning will come into place at 1pm on Wednesday, May 10, and will remain in place until 8pm.
The forecaster said: "Heavy showers and thunderstorms likely to cause some disruption to travel."
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The weather warning covers Co Down, Co Fermanagh, Co Armagh, and parts of Co Antrim and Co Tyrone.
The Met Office added: "Scattered heavy showers and thunderstorms will develop through this afternoon across much of central and eastern areas of Scotland, parts of central, eastern and southeastern England and southern areas of Northern Ireland, before easing during the evening.
"Where heavy showers develop, 15 mm of rain could fall within an hour and possibly 25-30 mm in 2-3 hours where showers become slow moving, along with lightning and hail."
What to expect, according to the forecaster:
- "There is a good chance driving conditions will be affected by spray, standing water and/or hail, leading to longer journey times by car and bus
- "Delays to train services are possible
- "Probably some damage to a few buildings and structures from lightning strikes."
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