The national forecaster said that after reviewing the latest weather charts, further snowfall and heavy winds are now expected throughout the day on Friday.
Given the reduced weather warning for Connacht, and parts of the West and Northwest, the semi state company said it may be able to operate some services in less affected areas for Friday, depending local road conditions and the level of treatment.
Heavier snow is expected in from the south east with thunderstorms/hail over all parts of Munster and south Leinster with gale force winds increasing the risk of coastal flooding.
Blizzard conditions are expected to continue in Eastern and Southern coast areas today.
Status orange warning means people should be prepared for significantly bad weather as roads may become unsafe due to icy conditions and possible snow. This will be in place from 4pm tomorrow.
Bus Eireann has also cancelled a number of services.
"Our snow and ice teams are working hard to clear the airfield".
The snow will continue overnight but it will become lighter and the northeasterly winds will ease back.
That is despite cars being abandoned near on-off ramps on some motorways as motorists experienced difficulties - in particular on the M7 and M9 motorway in Co Kildare, the N6 Dublin to Galway route in Co Westmeath and N2 near Ardee.
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