Yellow weather warning for ice in NI
Yellow warnings for ice and low temperatures were issued across Northern Ireland on Thursday night.
The Met Office issued the alert, which is in place between 17:00 GMT on Thursday and 10:00 GMT on Friday.
The warning is in place for counties Antrim, Armagh, Down, Londonderry and Tyrone.
The Met Office said icy surfaces could lead to difficult travel conditions.
There may be some icy patches on some untreated roads, pavements and cycling paths and conditions could lead to an increased risk of injuries from slips and falls.
As the cold weather continues, NI Water has reminded the public to be aware of the risk of frozen pipes, as they pose a risk to properties and possessions.
Advice includes wrapping your pipes and water tanks up, fixing dripping taps, knowing how to turn off your property's stop tap, checking your central heating boiler has been serviced and leaving the heating on low if you are going away.
There was widespread frost and a warning for ice and slippery surfaces on Friday morning with temperatures down to -1 degrees in some areas.
Friday night will be another frosty and icy one and with light winds freezing fog could become an added hazard as we head into Saturday morning.
Later on Saturday, an area of low pressure moves in from the southwest bringing spells of rain which potentially could turn to a disruptive spell of snow for some as it meets the cold air. This system will be accompanied by brisk east or northeasterly winds which could also lead to drifting snow, particularly on hills.
Details about how much snow and where are still uncertain at this point.
Republic of Ireland
In the Republic of Ireland, forecaster Met Éireann has issued a low temperature and ice warning for the country.
The warning will be in place from 18:00 local time on Thursday to 11:00 on Friday.
The forecaster warned that conditions will be very cold with widespread frost and ice as temperatures fall to -3 degrees or below in many areas.