Much of Illinois grappled Tuesday with a new icy wintry blast that dropped more than half a foot of snow in the Chicago area and kept temperatures in single digits, making commuting treacherous.
The National Weather Service said Oak Park was among the hardest hit, logging more than 8 inches of snow from the storm that pushed through overnight into Tuesday. A half foot of snow was reported near Chicago's O'Hare International Airport.
The temperatures hovered above zero, complicating efforts to keep the roads from icing.
"The temps are so cold it's hard to treat the roads. That's further exacerbating the problem," said Lyle Barker, a meteorologist in the weather service's Lincoln office.
Chicagoans shouldn't expect a respite, with a 50-percent chance of more snow forecast for today and temperatures peaking in the teens, meteorologist Amy Seeley said. The deep freeze in Illinois' midsection was expected to linger, with wind chills of 15 to 25 degrees below zero forecast for Thursday and Friday.
Lesser amounts of snowfall -- 1 to 4 inches -- fell in central Illinois, with much of that accumulation drifting across roadways before being compacted by vehicles, making driving conditions slick.
Indiana was hit much harder Tuesday. A 60-mile stretch of Interstate 65 was closed earlier in the day in the southern part of the state, but even after it was reopened some counties along the corridor declared travel watches or warnings.
Meanwhile, in northern Indiana, Lake County was at a standstill because a band of lake-effect snow had dropped nearly a foot of snow. Interstate 80/94 was at a near standstill for hours as snow came off Lake Michigan.
Meanwhile, the snowstorm continued east and clobbered parts of the mid-Atlantic and the urban Northeast, grounding thousands of flights, closing government offices in the nation's capital and making a mess of the evening commute.
The storm stretched 1,000 miles between Kentucky and Massachusetts but hit especially hard along the heavily populated Interstate 95 corridor between Philadelphia and Boston, creating perilous rides home for millions of motorists.
The National Oceanic and Atmospheric Administration said 10 inches of snow had fallen just outside Philadelphia in Drexel Hill by Tuesday evening. There was about 6 inches in Philadelphia.
The National Weather Service said parts of New York City also had about 6 inches.
The snow came down harder and faster than many people expected. Forecasters said some places could get 1 to 2 inches an hour, with wind gusts up to 50 mph. A blizzard warning was posted for parts of Massachusetts, including Cape Cod.
Highways in the New York City metropolitan area were jammed, and blowing snow tripled or even quadrupled drive times.
"I just want to get to the Bronx," motorist Peter Neuwens lamented. "It's a big place. Why can't I get there?"
In Jersey City, N.J., Stanley Gaines, wearing just a thin jacket and huddling beneath an overhang as snow stung his face, said he had been stuck for more than an hour waiting for a ride home from his appointment at a Veterans Affairs clinic.
"I'm waiting on anything I can get: a taxi, a shuttle, a bus," Gaines said, squinting to read the destination on an approaching bus in near white-out conditions. "I didn't really pay attention to the weather this morning because there was no snow on the ground, and now -- this!"
In White Plains, N.Y., Anthony Schirrone pulled over his car to scrape snow from the windshield.
"I just did this five minutes ago," he said. "But it's coming down too fast."
The storm was blamed for at least one death in Maryland after a car fishtailed into the path of a tractor-trailer on a snow-covered road about 50 miles northwest of Baltimore. The car's driver was thrown from the vehicle.
Forecasters said the storm could bring up to 14 inches of snow to Philadelphia and southern New England and up to a foot in New York City, to be followed by bitter cold as arctic air from Canada streams in. Washington was expecting 4 to 8 inches.
This one was a conventional storm that developed off the coast and moved its way up the Eastern Seaboard, pulling in cold air from the arctic. Unlike the epic freeze of two weeks ago, it was not caused by a kink in the polar vortex, the winds that circulate around the North Pole.
Pennsylvania's Department of Transportation said it had already blown through more than half of its $189 million winter weather budget.
"Lots of nuisance storms this season have meant that PennDOT crews have been plowing and treating roads more frequently this winter," spokeswoman Erin Waters-Trasatt said.
About 3,000 flights for Tuesday were canceled, with airports from Washington to Boston affected. More than 1,000 flights for Wednesday were called off as well. Amtrak planned to cut back train service.
The rush to get home early by many workers was evident in Philadelphia, where many commuter trains were packed.
The storm put a damper on New Jersey Gov. Chris Christie's inauguration, forcing the cancellation of an evening party on Ellis Island. Massachusetts Gov. Deval Patrick postponed his annual State of the State address, while the Philadelphia Flyers postponed their Tuesday night hockey game.
Schools in Pennsylvania, New Jersey, Connecticut, Virginia, West Virginia and Kentucky stayed closed for an extra day after the Martin Luther King Jr. Day holiday or sent students home early. Some parents kept their kids home all day, unwilling to put them on slippery roads for a few hours of school.
Federal workers in the Washington area were also given the day off.
Standing in Philadelphia's LOVE Park with snow swirling around her, visitor Jenn Byrne, of Portland, Ore., said the nasty weather put a crimp in her plans to do a "giant walking tour" of the city. But she vowed to soldier on, taking cabs instead of trudging. She wasn't wearing snow boots.
"I'll keep going. Just the means of transportation will change a bit," Byrne said.
Others shrugged off the snow as well.
In Herndon, Va., where voters were casting ballots in a special election that was likely to determine control of the state Senate, Earlene Coleman said she felt obligated to make her selection: "It only made sense to come out and do my duty."
Construction worker Tony Cockrell, stopping for coffee at a Hagerstown, Md., gas station, said he planned to continue driving to work sites in western Maryland and northern Virginia to supervise the installation of insulation in building projects.
"If you don't work, you don't get paid," he said, adding that deep cold is good for business. "We're trying to get stuff insulated so it doesn't freeze up."