The snow-ice orange and yellow weather warnings from Met Eireann have been extended from midnight tonight (Thursday) to midday tomorrow (Friday).
The orange weather warning is in place for counties Donegal, Leitrim, Mayo and Sligo.
Snow accumulations of between 4 and 8cm are possible, according to Met Eireann.
The yellow weather warning is in place for Longford, Cavan, Monaghan, Galway and Roscommon where snow accumulations of 2 to 4cm are possible.
Tonight, wintry showers will continue across the northern half of the country, but it will become mostly dry with clear spells further south, Met Eireann has said.
There will be lows of zero to minus 1 degrees with frost and some icy patches forming in sheltered inland areas, but it said there will be lowest temperatures of 2 or 3 degrees along coastal fringes where northwesterly winds will be strong and gusty.
Tomorrow Friday, will be a cold and breezy day with sunny spells and scattered showers, according to Met Eireann.
It has promised afternoon temperatures of 4 to 6 degrees but it will feel colder due to wind chill from blustery northwesterly winds.
Lows of minus 6 in store for the weekend – Met Eireann
Saturday will remain cold with frost persisting all day in sheltered areas and top temperatures only 3 to 6 degrees, Met Eireann has said.
Fog patches may persist also but overall it will be a dry, sunny day, it said.
Again, Met Eireann said that freezing fog may develop on Saturday night.
It will stay dry and cold on Sunday but any fog and frost will clear as winds strengthen and it said that there will be temperatures of 4 to 7 degrees in strengthening southeasterly winds making the day feel pretty raw despite sunny conditions.
Cloud will push in across Munster and patchy rain/sleet may affect Munster Sunday evening/night and temperatures here should stay above freezing.
But generally another frosty night in store for Sunday night with further icy conditions.
Looking to next week, Met Eireann has said that it looks like the cold spell will continue into mid-week.