Snow and ice will make driving conditions hazardous in some parts of the country today.
The worst affected areas are Donegal, Leitrim, Mayo, and Sligo.
The ESB has also reported damage by lighting in Sligo.
Tonight will be a cold and windy night, with lowest temperatures of -1 to +2C. Some sheltered areas will experience frost.
The week will begin equally cold and windy, but a few sunny spells will develop as the day progresses.
It will be mostly dry by the afternoon, but it will remain cold throughout the day, with top temperatures reaching 5 to 7C.