A status orange low temperature and ice warning comes into affect at 6pm today.
The country will face plummeting temperatures tonight.
It's set to be the most severe night of the current cold spell, with minus 10 degrees possible in some areas.
A Status Orange warning for low temperatures and ice comes into affect for 19 counties at six o'clock.
Another Status Orange warning has been issued for Thursday night and concerns 25 counties - with Donegal the only exception.
Rhode man Cathal Nolan from Ireland's Weather Channel says although it will be bitterly cold, there won't be much snow.
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