A snowstorm in the Northeast dumped more than six inches of snow in some areas by Thursday afternoon, while several feet of lake-effect snow were expected in areas along the Great Lakes over the weekend, making Thanksgiving travel dangerous for drivers.

The storm was moving north from northeastern Pennsylvania, where some areas north of Interstate 80 had gotten up to four inches of snow by Thursday afternoon.

Snow was also falling in northern New England, and over a foot could pile up in inland Maine and northern New Hampshire, according to the National Weather Service.

“The storm is moving along at a fairly progressive pace,” said Scott Kleebauer, a meteorologist at the service’s Storm Prediction Center. “That’s one of the positives, at least to limit some of the snowfall over portions of northern New England.”

Up to six inches of snow were expected across the Mid-Atlantic region.

A winter storm warning was in effect until 1 a.m. Friday for several counties in upstate New York, including Fulton and western Schenectady Counties, and for Bennington and western Windham Counties in Vermont. There were snow and ice conditions on northern stretches of Interstates 87 and 90 on Thursday afternoon.

The Albany area, which had an inch of snow by Thursday afternoon, was forecast to receive from three to six inches. To the west, Richmondville, N.Y., had already received six inches of accumulation.