Met Eireann is advising that severe thunderstorms can be expected throughout the country later today.
A yellow weather warning has been issued for the 26 counties, and a similar alert's in place in the North.
The warnings will start from 4 o'clock this afternoon and will be in place until 9am tomorrow morning.
Met Eireann says heavy thunderstorms are expected this evening and tonight with some severe downpours, hail and spot flooding.
Due to the localised nature of thunderstorms, some parts of the country will remain dry.