The very cold temperatures this morning across Ulster will linger in some areas today, according to Met Éireann.
Wintry showers will move southwards over the region.
This afternoon will be mainly dry with sunny spells. Highest temperatures of only 0 to 4 degrees, with light variable breezes.
Tonight will be mainly dry, but very cold with widespread severe frost and with ice on roads and paths.
Patches of freezing fog in many areas also. Lowest temperatures of -5 to 0 degrees with light northerly or variable breezes.
Main pic: A snowy Errigal captured this morning by Mark Coyle.