Rain clearing to the north by around midday, leaving some brighter conditions for most but breezier with isolated heavy coastal showers.
The snow is expected to taper off late Saturday night. Turning much colder and more unsettled from midweek.
MET ÉIREANN HAS forecast a "significant change" in the weather pattern from tonight, with a noticeably colder and more wintry spell ahead.
Carlow Weather's Alan O'Reilly expects something similar and explained why.
Wintry showers can also be expected - mainly for high ground to the west.
Families in Essex woke up to winter scenes this morning after a heavy fall overnight in some parts of the United Kingdom - defying some meteorologists' predictions the North would be mainly hit.
It added that temperatures going into next week would be lower than the 7C (44.6F) to 9C (48.2F) average.
There will be a good deal of dry weather and little patchy drizzle. Widespread frost is likely to develop at night under clear skies too. Best afternoon temperatures of five to eight degrees but become noticeably colder as the afternoon progresses in moderate to fresh westerly winds.
Wednesday: Wednesday will start off cloudy with scattered outbreaks of rain moving southeastwards through the morning.
Temperatures on Thursday night are expected to fall to freezing and below quite widely, with lows around -4C likely in some countryside areas.
Thursday: There is some uncertainty in the forecast for Thursday.
"It's too early to say what the precipitation type will be, it could be sleet, it could be snow on higher ground, we will need to see closer to the time", said forecaster Paul Downes. Parts of upstate New York, Connecticut, and Western Massachusetts could get up to a half-foot of snowfall with 12 to 18 inches possible in northern Vermont, New Hampshire, and Maine.