Over 100 schools have been closed across Northern Ireland due to overnight snow blizzards.
A yellow warning has been issued by the Met Office.
The snow has hit hardest in the north west and County Tyrone, County Fermanagh, County Derry have been worst affected.
The ferry service between Rathlin Island and Ballycastle has also been affected.
Translink also confirmed that bus services to Derry have been affected but passengers will be able to use their tickets for rail services.
Police have advised motorists to take extra care.