National Weather Service United States Department of Commerce

Widespread precipitation will changeover to snow by early this evening across western NY, becoming all snow across the northern Finger Lakes region and North Country tonight. Snow will transition to lake effect snow Thursday through Thursday night.
Widespread snow is expected across the region tonight. Snowfall onset by early this evening for western NY and changing over to snow closer to midnight for areas further east. Plowable accumulations expected in most areas with initially wet snow before transitioning to light, fluffy snow early Thursday morning. Localized higher accumulations possible across the Niagara Frontier, Chautauqua Ridge, and Boston Hills.
Widespread snow transitions to lake effect snow through Thursday. Main lake effect and upslope snow areas will be across the Chautauqua Ridge to the Boston Hills. Main lake effect area is expected to be east-southeast of Lake Ontario. Snowfall rates of 1-2" per hour are possible in persistent heavy snow bands.
Temperatures will drop well below normal behind a passing arctic front tonight through Thursday night. Combined with breezy winds, windchill values will drop to the low single digits to as low as 10 degrees below zero.
Arctic air will move into the region tonight through Friday morning. Wind chill temperatures will persistently be in the low single digits to below zero region wide.