Significant rain is expected throughout the day with a risk of flooding.
Local authorities in many parts of the country are on alert as people are being warned of very heavy rain.
Counties Dublin, Wicklow and Wexford will be under a status orange rain warning from 2 this afternoon until 11am tomorrow morning.
A yellow alert has been issued for 10 counties in the south and east, from 9am this morning.
Rhode's Cathal Nolan, founder of Ireland's Weather Channel said there will be significant rain and strong winds.
The Road Safety Authority is advising road users to take extra care when using the roads during the heavy and persistent rain over the next 24 hours.
David Martin head of media relations at the RSA said drivers need to reduce speed particuarly on motorways.
Rebecca Cantwell from Met Eireann says there's a severe risk of flooding:
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