The MET Office has issued a yellow warning of heavy showers and thunderstorms across Northern Ireland later today.
These may become slow-moving in places, with potential for some localised flooding.
Heavy and thundery showers are likely to give 10 mm of rain in an hour in places, and could linger in some spots resulting in 20 to 30 mm in just a few hours.
The showers will then die away again this evening.
Maximum temperature 18°C.
Tomorrow is expected to be a drier and brighter day with some good sunny spells developing although there is still the risk of an isolated shower but these mainly over the hills.
Maximum temperature 19°C.
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