Up to 40mm of rain is forecast.
Met Eireann's warning of possible flooding in parts of the east, midlands and north-west over the next 24 hours.
Up to 40mm of rain is forecast, with a Status Yellow alert in place for 12 counties until tomorrow morning.
Strong winds will also affected Atlantic coastal counties - two Status Yellow warnings are also in place until later tonight.
Forecaster, Andrew Doran Sherlock, says it's not looking good for the rest of the week either: