It comes into effect from 12 noon.
Hazardous driving conditions can be expected in the south-east today, with a status yellow thunderstorm warning issued for six counties.
It'll come into effect for Wicklow, Carlow, Kildare, Laois, Kilkenny and Tipperary at midday and run until 8 o'clock this evening.
Met Éireann say it will lead to spot flooding in places.