It comes into effect from 6 pm tomorrow evening.
Temperatures are expected to drop to as low as minus four degrees in the Midlands, with a number of status yellow warnings issued.
A low temperature and ice warning will impact Laois, Offaly and Westmeath from 6 o'clock tomorrow evening until 11 on Sunday morning.
Donegal will be subject to a snow and ice alert from 8pm today until 11am tomorrow - and again from 6pm tomorrow until 11am on Sunday, along with Cavan, Monaghan, Louth and Connacht.
Met Éireann is warning of hazardous travelling conditions and poor visibility.
HSE Bringing BreastCheck Screening Service To Laois
Pregnancy and Infant Loss Awareness Day To Be Marked In Offaly
Laois Senator And Family Left Shaken After Attempted Car Theft At Their Home
Westmeath Woman Recovering Well After Major US Cancer Operation
Midlands Councillors To Seek Extra Funding For Deteriorating Roads
Right To Be Forgotten Law Comes Into Effect For Cancer Survivors
Young People Retrace 165km Famine Walkway Journey To Commemorate Irish history
“Very poor” Repairs To Farm Equipment Key Factor In Fatal Injuries To Laois Man