The snow coated an area that included Delaware, Pennsylvania, Maryland, New Jersey and New York, and moved north overnight. Several cities reported accumulations of about 6 inches.
"This is truly a statewide storm," said David Buck, a spokesman for the Maryland State Highway Administration. "We have folks across the state working."
Commuters throughout eastern and southeastern Massachusetts had slow going on Friday morning as snow continued to fall there. The National Weather Service said that the snow was already is tapering off in Central Massachusetts, and would leave the Boston area in the afternoon.
In New Jersey on Thursday, trains were unusually crowded and passengers slipped on unshoveled platforms. Planes were reported delayed by up to two hours at Newark airport. Several accidents reduced traffic on New Jersey's clogged roads to a crawl.
Standing outside a New Jersey convenience store, Taylor Matthews saw the first few flakes fall and said she could not believe it.
"It's 60 degrees in January and we hardly have any snow all winter, and now it seems to come every other day," said Matthews.
The accumulation pushed 2004-05 snowfall totals past the seasonal average in most places in New Jersey.
Drivers in the nation's capital found mostly wet road conditions as pavement temperatures hovered just above freezing most of Thursday. The federal government closed two hours early.
Snowy roads contributed to a fatal accident in Maryland after a driver lost control of his car and slid into the path of an oncoming tractor trailer. Nearly 60 traffic accidents had been reported across Delaware by late afternoon, but none resulted in more than minor injuries.