'Heed changing conditions' - some schools will remain closed as weather warning issued and temperatures to fall to -8C
Some schools in areas worst hit by the adverse weather conditions will remained closed today as temperatures are set to plummet to -8C.
Wrap up warm and stay by the fire as heavy snowfall is expected overnight, as the cold-snap continues many roads will be "treacherous" tomorrow.
Met Eireann has issued a Status Orange Low Temperature Warning - their second highest alert - has been issued until 10am this morning.
A Forecaster advised: "Extremely low temperatures tonight with severe frost, ice and lying snow.
"Lowest temperatures of -2 to -8 degrees, coldest in east Connacht, Leinster and Ulster.
"Slippery paths and treacherous roads also due to snow accumulation and ice."
The Department of Education and Skills has said schools nationwide will remain open tooday.
A spokesperson told RTE News: "The Department is continuing to monitor the situation nationwide and will follow any advice from the National Emergency Coordination Group."
Many parents and pupils will be waiting to hear this morning if their school has decided to remain closed.
In Co Longford, affected primary schools are Newtowforbes, Drumlish, Ballinalee, Ballinamuck, St.Emer's, St. Mel's, Ardagh and Melview, while the second-level , Ardscoil Phádraig, Granard is also closing.
In Co Mayo, all national and secondary schools will remain closed in Westport and Louisburgh.
Also in Co Mayo - the primary and secondary schools in Balla are closed, as is Belcarra NS, St Louis School in Kiltimagh, meanwhile in Castlebar, St. Patrick's NS and St. Angela's NS are closed and Davitt Coillege, St. Joseph's Secondary School and St. Gerald's College have decided not to open until 11.30am.
An Garda Siochana has advised the public to "exercise extreme caution" and not to make unnecessary journeys.
They said in a statement: "People living in areas where an Orange level weather warning has been issued should exercise extreme caution when travelling and avoid unnecessary journeys.
"There has already been falls of snow in parts of the country with more forecast and motorists are asked to heed the changing conditions.
"Drivers should be aware that it takes longer to stop a vehicle on an icy road so slow down and allow extra distance between you and the vehicle in front.
"Motorists should clear the windows and mirrors of your vehicles before you set off on your journey and carry a screen scraper and de-icer. Do not use hot water on the windscreen as it can crack the glass.
"Ensure you remove ALL snow from your vehicle before commencing your journey as snow left on the roof will become loose and can drop onto the windscreen during braking, causing severe restriction to your vision.
"It can also fall off during your drive and cause injury to pedestrians or a reflex action by another driver."
Assistant Commissioner Michael Finn, Roads Policing, added: "Please be aware that visibility is reduced in snowy conditions so drive slowly if you need to make a journey. Allow extra distance between you and the vehicle in front.
"Motorcyclists and cyclists should not comprise their safety by their 'need' to travel in icy or snowy conditions. Be safe".