Snow and icy conditions will hit the north of Ireland on Wednesday night, with Met Éireann issuing a status yellow warning for Co Donegal.
Heavy wintry showers of hail, sleet and snow are expected from late on Wednesday and all day on Thursday with reduced visibility and accumulations likely in places.
Icy patches forming overnight may cause some travel disruption.
The warning for Donegal is valid from midnight on Wednesday until midnight on Thursday.
Sunny spells & blustery showers, most frequent in the northwest however becoming widespread through the day, some turning heavy with the risk of hail in the west. Feeling cold in fresh and gusty westerly winds, highs of just 5 to 8C.
Below temp forecast for the next 24 hours. pic.twitter.com/pt3j49HFzo
— Met Éireann (@MetEireann) December 2, 2020
A similar warning has also been issued by the UK Met Office for counties Antrim, Fermanagh, Tyrone and Derry.
On Tuesday Met Éireann warned of much colder spells for the rest of the week.
It issued an advisory warning for the entire country, warning of “sharp to severe” frosts in parts as well as wintry showers.
The warning will be in place from Thursday afternoon until Friday night.