Millions prepare to stay put

WASHINGTON - A storm that arrived postcard-pretty in the nation's capital Friday was morphing into a painful, even paralyzing blizzard with gale-force winds pushing heavy snow and coastal flooding. One in seven Americans could get at least half a foot of snow by Sunday.

The first flakes were lovely, but forecasters warned that much, much more was on its way.

Not that anyone will see the worst of it: Much heavier snow and wind gusting to 50 m.p.h. should create blinding whiteout conditions once the storm joins up with a low pressure system off the coast, said Bruce Sullivan, a forecaster at the National Weather Service's Weather Prediction Center in College Park, Md.

Two feet or more of snowfall was forecast for Washington and Baltimore. New York City's expected total was upped Friday to a foot or more. But Sullivan said "the winds are going to be the real problem; that's when we'll see possible power outages."

The result could create snowdrifts four to five feet high, so even measuring it for records could be difficult, he said.

By evening, wet, heavy snow was falling in the capital, making downed power lines more likely, and yet many people remained on the roads, Mayor Muriel Bowser said. "Find a safe place and stay there," she beseeched.

As food and supplies vanished from store shelves Friday, states of emergency were declared, lawmakers went home, and schools, government offices, and transit systems closed early around the region.

More than 6,000 flights were canceled Friday and Saturday - about 13 percent of the airlines' schedules, according to the flight tracking service FlightAware. They hope to be fully back in business by Sunday afternoon.

Sporting events were called off, bands postponed concerts, and NASCAR delayed its Hall of Fame induction ceremony.

Broadway's shows were still going on in New York, but as snow fell in Atlanta, people there were urged to stay home all weekend, rather than risk a repeat of the city's 2014 "icepocalypse," when a relatively mild winter storm caused days of commuter chaos.

At least seven people died in storm-related crashes before the worst of the storm, including Stacy Sherrill, whose car plummeted off an icy road in Tennessee. Her husband survived after climbing for hours up a 300-foot embankment.

"They're slipping and sliding all over the place," said Kentucky State Police Trooper Lloyd Cochran - as soon as one wreck was cleared, other cars slammed into one another, causing gridlock for hours on interstate highways.

Travel was already impossible across a wide swath of the Ohio River valley. Nashville was gridlocked by accidents. Several drivers died on icy roads in North Carolina.

Conditions quickly became treacherous all along the path of the storm. Arkansas and Tennessee got eight inches; Kentucky got more than a foot, and states across the Deep South grappled with icy, snow-covered roads and power outages. Two tornadoes arrived along with the snow in Mississippi. The storm could easily cause more than $1 billion in damage, weather service director Louis Uccellini said.

All the ingredients have come together for a massive snowfall: The winds initially picked up warm water from the Gulf of Mexico, and then the storm was taking much more moisture from the warmer-than-usual Gulf Stream as it rotated slowly over the Mid-Atlantic, with the District of Columbia in its bull's-eye.

Blizzard warnings stretched to just north of New York City. Boston and other New England cities should get a less windy winter storm, and much less snow.

In all, 82 million Americans will get at least an inch of snow, 47 million more than 6 inches, and 22 million Americans more than a foot, Ryan Maue at WeatherBell Analytics said Friday.