UPDATE 12:06 p.m. EST:
Even plow trucks aren't immune.
UPDATE 11:12 a.m. EST:
Amtrak suspended service.
UPDATE 10:31 a.m. EST:
While New York has lifted a blizzard warning, the storm continues to wreak havoc in parts of the northeastern United States.
A Ryder truck overturned in Fairfax County, Virginia, according to our partners at WJLA. The driver's condition is not yet known.
Here's a look at the truck getting towed away.
UPDATE 8:53 a.m. EST:
Nearly 100,000 people are without power as the East Coast is slammed with a heavy snowstorm.
More than 50,000 people were in the dark in Virginia alone, according to Dominion power. Maryland has reported about 30,000 power outages.
UPDATE March 14, 7:40 a.m. EST:
With the Northeastern snowstorm in full swing, blizzard warnings are in effect for at least parts of eight states: Pennsylvania, New Jersey, New York, Connecticut, Rhode Island, Massachusetts, New Hampshire, Maine and Vermont.
The National Weather Service's Philadelphia-area office called the storm "life-threatening" and warned people to shelter in place.
Thousands of flights have already been canceled.
This is a serious winter storm. It's obviously going to be the biggest event we've had this season and people ... need to be safe.
In Washington, D.C., the Office of Personnel Management announced a three-hour delay for non-emergency government workers.
Meanwhile, all of New York and Maryland are under states of emergency.
With March Madness set to tip off today, college basketball teams were altering travel plans to avoid the storm. Villanova University, the top-ranked team, left Philadelphia early to get to Buffalo, N.Y., before the storm.
UPDATE 9:17 p.m. EST:
Boston, Philadelphia and New York City school districts have already announced closings for Tuesday, as a major winter storm is set to bear down on the Northeast overnight.
So far, about 6,500 flights scheduled for Tuesday have been canceled, according to Flightaware.com.
The National Weather Service has issued blizzard warnings and watches for much of the Northeast, including parts of New Jersey, New York and Connecticut.
UPDATE 6:18 p.m. EST:
A blizzard is barreling toward the Northeast and the region has already begun preparing by closing schools, canceling flights and issuing travel warnings.
So far, about 4,000 flights that were scheduled to take off from some of the area's biggest airports have been canceled.
"Everyone along the east coast be safe and listen to local officials as a major winter storm approaches," President Donald Trump tweeted ahead of the storm.
New York City Mayor Bill de Blasio already announced that public schools will be closed Tuesday.
The city is expected to get 18 inches of snow or more with coastal flooding and wind gusts as high as 40 to 50 mph. The snow is expected to hit New York after midnight, with the greatest accumulation taking place between 6 a.m. and noon on Tuesday.
"This should be a very serious blizzard, one that everyone should take seriously," de Blasio told CNN.
UPDATE 1:53 p.m. EST:
The incoming snowstorm has postponed a visit by German Chancellor Angela Merkel. She was scheduled to arrive Tuesday but will instead arrive Friday, White House Press Secretary Sean Spicer said Monday.
Just in: German Chancellor Merkel has postponed her visit to the White House because of snow, rescheduled for Friday.— Philip Rucker (@PhilipRucker) March 13, 2017
UPDATE March 13, 8:04 a.m. EST:
Flight delays have already stretched into Wednesday as the Northeast braces for a storm that could dump as much as 18 inches of snow over major cities.
According to FlightAware, 2,040 flights had been delayed Monday, and 1,215 were cancelled. Yesterday, 577 flights were cancelled, with more than 6,000 delayed.
Southwest is expected to ground almost all of its flights on Tuesday, and other airlines may follow suit, USA Today reports.
ORIGINAL STORY: High winds and up to a foot of snow are expected early this week across parts of the Northeast.
The National Weather Service said Saturday that a blizzard watch is in effect for coastal regions including New York City and Boston from Monday night into Tuesday. It warned that the New York metro area could be covered with an estimated 12 to 18 inches of snow.
Forecasters said New York along with Long Island and coastal Connecticut could see damaging wind gusts of up to 50 mph.
Those wind gusts could cause widespread power outages, forecasters warned.
Carlie Buccola, a meteorologist based on Long Island, said visibility in those areas could be a quarter mile or less.
A winter storm watch was issued for parts of the Northeast including New Jersey, Pennsylvania and New England. The lower Hudson Valley and northeastern New Jersey could also see up to 18 inches of snow but are not under a blizzard watch because high winds are not expected.
Philadelphia, Baltimore and Washington, D.C. are also under winter storm watches.
This storm has the potential to be a significant Nor'easter, according to meteorologists.
"The first low begins in the Midwest and progresses east to the Mid-Atlantic region. The second low begins off the coast of Florida and moves north along the east coast and meets up with the first low around Washington, D.C.," said CNN's meteorologist Allison Chinchar. After the storm hits, much of the region will still face extremely cold temperatures until the weekend.
The Associated Press contributed to this report.