Met Éireann have issued an orange snow and ice warning for Counties Cavan and Monaghan.
Showers of hail, sleet and snow are expected tonight with a risk of drifting and blizzard conditions.
The warning which will also affect Donegal, Leitrim, Mayo and Sligo, comes into force at 6 o’clock this evening for 48 hours.
Council authorities will be out in force this evening pre-emptively salting national and regional roads.
Motorists are advised to exercise extreme caution when driving and are urged to leave extra time to get to their destination.