Federal forecasters said what is likely to be the «biggest snowstorm of the season» could leave piling snow on New York City streets Tuesday morning.

The front will also dump snow to points north and east, the National Weather Service said, with a chance of up to 8 inches in New England.

«New York City will be in the far south for the heaviest snowfall and could mix with sleet at times, limiting snowfall amounts to 2-6-[inch] range, but it will likely be the biggest snowstorm of the season,» the service said in a forecast discussion.

Snow was expected to start falling Monday night and would likely change to sleet overnight, forecasters said. For New York City, snow could turn to rain by morning, according to the weather service office that covers the area.

Still, forecasters expected an accumulation of snow that has been rare this winter. There was a 76% chance that Central Park would get at least 2 inches of snow overnight, according to NBC New York.

Much of the Hudson Valley and northern New Jersey could see half a foot of snow when all is said and done, the station said.

The forecast prompted Governor Ned Lamont of neighboring Connecticut to close all state buildings under his office’s control Tuesday. In a statement Monday night, he urged people in his state to stay off the roads if possible.

«So far we’ve been lucky this winter season with very little snow thus far, however it looks like that will change Monday night as a major snow storm will hit Connecticut,» Lamont said.

He ordered non-essential state workers to work from home or, if that’s not possible, to stay put, while 600 trucks used for road salt and snow removal were deployed to keep Connecticut’s highways open.

The Massachusetts Emergency Management Agency saying Monday that power outages were possible in the central and western regions of the state, where heaviest snowfall was expected.

Federal forecasters blamed a system, with cold air «locked in place,» moving east from the Great Lakes to the northeast and eventually toward the northern edges of New England.

The system activated winter storm warnings and winter weather advisories from central Pennsylvania to coastal Maine.

Federal meteorologists in Buffalo, in western New York, said the storm had already given the area a 4-inch layer of snow in a few hours Monday night.

The National Weather Service office covering Buffalo described it on Twitter as a «burst of heavy snow.»

The storm was bringing steady rain to Baltimore and Washington, DC, on Monday, while the Allegheny Mountains to the west likely had freezing fog, the weather service said.

Gemma Di Casimirro contributed.