Snow blankets Washington D.C. in potentially record-setting storm

A thick layer of snow covered the Washington DC area on Saturday as a potentially record-setting blizzard arrived on the East Coast, paralyzing road, rail and airline travel from North Carolina to New York.

The Washington and Baltimore metro areas were expected to bear the brunt of the storm. Two to three feet of snow are likely, accompanied by winds of 30 to 50 miles per hour (48 to 80 km per hour), before the storm winds down on Saturday afternoon, according to the National Weather Service.

Steady snow was falling on southeastern Pennsylvania, including Philadelphia, early on Saturday. The storm is forecast to head north toward New York City later in the day.

The National Weather Service said it was too soon to tell whether the snowfall will break records around Washington D.C. and Baltimore.

"Either way, we're looking at a significant event," said NWS meteorologist Frank Pereira.

The full force of the storm could dump enough snow on Washington to eclipse the 17.8 inches (45.2 cm) of the "Snowmageddon" storm of 2010. Total snowfall might rival the "Knickerbocker" storm of 1922, when a record 28 inches fell.

Residents preparing for a weekend indoors laid in stores of food, water and wine. Some stores were left with bare shelves.

The Weather Channel said more than 85 million people in at least 20 states were covered by a winter weather warning, watch or advisory.

The storm developed along the Gulf Coast, dropping snow over Arkansas, Tennessee and Kentucky on Friday. On the East Coast, warm, moist air from the Atlantic Ocean collided with cold air to form the massive winter system, Pereira said.

The storm was forecast to move offshore in southern New England early next week. Philadelphia and New York were expected to get 12 to 18 inches of snow before the storm abated.

Low-lying areas of New York and New Jersey - some still rebuilding after Superstorm Sandy in 2012 - might see flooding during high tides on Saturday and Sunday, officials said.

Governors in several states, including New Jersey, Pennsylvania, Maryland, Virginia, North Carolina and Georgia, as well as the mayor of Washington, declared states of emergency. Officials warned people not to drive.

"This has life-and-death implications and all the residents of the District of Columbia should treat it that way," Washington Mayor Muriel Bowser said at a Friday press conference.

At least two people were killed in accidents in North Carolina, where officials said ice was making roads treacherous.

More than 7,100 airline flights were canceled across the country on Friday and Saturday, according to flight tracking website FlightAware.com. Amtrak modified service on train routes along its busy Northeast Corridor.

The Washington Metropolitan Area Transit Authority, which includes the country's second-busiest subway system, took the rare step of suspending operations from late Friday through Sunday.

New Jersey Transit shut all bus, rail and light rail service at 2 a.m. local time on Saturday. Service would be restored as "conditions permit," the agency said.

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