Scattered snow showers will occur later Thursday, Thursday night and into Friday, while slight to moderate accumulations are possible with up to 3cm in parts.
Met Éireann has issued an updated weather warning for Ireland of high winds, low temperatures and a chance of ice and snow..
The UK Met Office has named the storm Caroline.
The weather will take a turn in the next 24 hours, and it's set to become bitterly cold for the next few days.
Another warning is in place for Thursday from 3am until 8pm, as Storm Caroline hits Scotland, and will also generate strong and blustery winds over Ireland.
Gusts between 100 to 110 km/h are forecast, with the strongest winds in coastal areas and over high ground.
"When we see weather conditions worsen we also tend to see people who would normally cycle, walk or use public transport opt to use a auto if they have access to one".