The status red weather alert now in place across Leinster and Munster has been extended until 6pm tomorrow. Eastern and southern coastal counties will be worst affected.
A Status Orange weather alert has been extended to counties Cork, Waterford and Wexford.
It came in at 5am this morning for Dublin, Kildare, Louth, Wicklow and Meath and will remain in effect until 12 o'clock tomorrow afternoon.
"We will provide a further update in relation to the operation of scheduled services from Saturday morning", they stated.
Dublin Bus is reviewing the situation on an ongoing basis and is taking advice from Met Éireann and the National Emergency Co-ordination Committee.
Further heavy snowfall will continue across many parts of the east of the country today.
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Met Eireann is forecasting blizzard conditions tonight that will extend through Leinster, Munster and Connacht in strong and gusty northeasterly winds.
Evelyn Cusack, deputy head of forecast at Met Eireann said that meteorologically Thursday was an ice day because the air temperature did not rise above freezing anywhere in the country.
The Gardai motorways are open, but some problems are occurring on slip roads entering and exiting motorways, with trucks in particular finding it hard.
The weather is due to get worse tomorrow, with Storm Emma moving from the south and expected to bring a blizzard.
"A spin machine can not distribute grit". We're also live here with the latest updates on the severe weather.