Met Eireann issued the status yellow caution on Wednesday, which is in place from 4pm on Thursday December 7 until 4pm Friday December 8.
"North and northwest counties will be most at risk, as well as higher ground elsewhere".
"An Atlantic storm will pass close to the north coast of Scotland on Thursday morning", the warning states.
And that's before we even mention the severe frost and snow showers forecast for Thursday and heading into the weekend, with temperatures expected to drop to as low as -3 degrees in places.
The forecaster continued: "Thursday night will be bitterly cold and windy, with clear spells and wintry showers of hail, sleet and snow, most frequent in Ulster, Connacht and in west Munster, but in other areas also".
Road conditions will be in a poor state across the country and motorists are advised to be vigilant for ice and to slow down.
It is one of three weather warnings now in place around the country.
Motorists are also being warned that the impact that falling snowfall or sleet can have on visibility may make it more hard to see vulnerable road users.