A status red weather warning will take effect in Leinster at 4pm tomorrow.
A red alert is already in place for eastern counties with up 16cm of snow in some parts.
An orange snow-ice warning is in operation in Cavan, Monaghan, Donegal, Leitrim, Mayo, Roscommon and Sligo.
The National Emergency Co-ordination Group for Severe Weather met on Monday morning and said it will meet at least once a day for the rest of the week.
Heavy overnight snowfall has led to accumulations of snow between 5 and 10cm.
Met Eireann has said "there will be little change" this evening or tonight with the snow showers continuing and snow building on the ground.
Conditions will remain very cold with daytime temperatures expected to remain around freezing; strong and gusty easterly winds are also forecast.
The Gardai motorways are open, but some problems are occurring on slip roads entering and exiting motorways, with trucks in particular finding it hard.
As expected, confirmation has been made today that local coach and rail service providers will not be operating on Friday as Storm Emma intensifies and much of the country shuts down amidst the extreme weather.
Met Éireann has warned of scattered heavy snow showers and icy conditions throughout the day, with the alert not due to be lifted until 6pm this evening.
An FCI spokesperson said the contractors should be used where necessary. We're also live here with the latest updates on the severe weather.