A Status Yellow rain warning has been issued for Donegal, Galway, Mayo and Sligo.
This comes into play from 11:00am tomorrow morning, Sunday September 24.
Outbreaks of heavy rain will push northwards with highest accumulations over hills and mountains.
Localized flooding can be expected which may lead to traffic disruptions.
The warning is valid until 9:00pm tomorrow night.
For more information on weather warnings you can visit www.met.ie