Met Eireann has issued a rain and thunderstorm warning for 16 counties, including Kilkenny.
The Status Orange warning covers all counties in Leinster as well as Cavan, Monaghan, Tipperary and Waterford.
It comes into effect at 11pm tonight.
The warning states that heavy rainfall with embedded thunderstorms is likely to cause flooding.
It remains in place until 5.15pm on Friday.
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