A Status Yellow snow and ice warning for counties including Donegal, Leitrim and Sligo remains in effect until 12 noon today.
There may be falls of snow in places this morning leading to accumulations in some areas.
In Northern Ireland, there's a Yellow Snow and Ice Warning for counties including Fermanagh and Derry until midnight tonight.
Gardai are urging motorists to leave extra times for their journeys this morning.
Alan O'Reilly from Carlow Weather says ice rather than snow may be the problem.
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