A fast-moving winter storm brought high winds and heavy snowfall to a wide stretch of the eastern United States on Saturday, knocking out power to thousands and disrupting travel with hazardous conditions, meteorologists said.
As the storm traveled from Tennessee to Maine, putting about 16 million people under a National Weather Service winter storm warning, meteorologists warned that the precipitation would be followed by a cold snap and strong winds.
“It’s a rather expansive winter storm, but it’s very, very quick moving,” Andrew Orrison, a meteorologist in College Park, Md., at the service’s Weather Prediction Center, said on Saturday. “So it’s one of those deals where the worst impacts are really just going to be for today.”
Heavy snowfall was already affecting the central Appalachians on Saturday morning, Mr. Orrison said, and it would be moving rapidly across the northern mid-Atlantic region and up into the Northeast over the course of the day.
Snowfall exceeded eight inches in some parts of Kentucky, Pennsylvania, Tennessee and West Virginia, according to preliminary reports from the Weather Service.
The Pennsylvania Department of Transportation asked drivers to avoid unnecessary travel and imposed speed restrictions on some roads.
Snow may fall in some places at a rate of one to two inches per hour and may combine with winds of up to 50 miles per hour, leading to “blowing and drifting snow” from the central Appalachians to the Northeast, the Weather Prediction Center warned on Twitter on Saturday morning.
“Severely reduced visibility and white-out conditions will make travel extremely dangerous at times,” the center said.
The center also warned that sharp temperature drops were expected overnight in much of the eastern United States. In Tampa, Fla., temperatures were forecast to reach 79 degrees on Saturday before falling to 36 degrees overnight.
A line of heavy rain showers and thunderstorms were also moving east on Saturday afternoon from Virginia to North Carolina, where a severe thunderstorm warning was in effect and wind gusts of up to 70 m.p.h. were expected.
The Weather Service warned that the high winds and low temperatures in the eastern United States could lead to dangerous conditions on untreated roads and contribute to power failures and tree damage.
Nearly 53,000 people were without power in Georgia on Saturday afternoon, according to PowerOutage.us, which aggregates data from utilities across the United States. More than 90,000 others were without power in Florida, North Carolina, Pennsylvania and Virginia.
The severe weather conditions also affected travel on Saturday, with more than 1,200 flights canceled within, into or out of the United States on Saturday, according to FlightAware, a flight tracking service. More than 4,500 flights were delayed.
Dolly Parton’s amusement park, Dollywood, in eastern Tennessee, was scheduled to open to the public for the first time this year on Saturday, but the opening was postponed because of overnight snowfall.
One meteorologist said that it was not unusual to see a late winter storm system in March.
“March is one of those months where there are some years that we see plenty of snow and there are some years we see next to nothing,” Torry Gaucher, a meteorologist with the National Weather Service in Norton, Mass., said on Friday.
“Technically, we’re in meteorological spring,” he added. “Calendar-wise, we have another month before spring really arrives.”
Cities closer to the coast, including New York City and Boston, were expected to receive a mix of rain and snow, with significantly less accumulation. The Boston area could receive at least an inch of snow on Saturday and Sunday morning.
This weekend’s storm follows a pattern of active winter weather throughout much of the South and East Coast this year.
In early January, back-to-back storms created perilous driving conditions in the Mid-Atlantic and the Northeast, including one weather system that stranded hundreds of drivers on Interstate 95 in Virginia for more than 24 hours.
In mid-January, another storm slammed the South, killing at least two people and leaving thousands without power before moving north and dropping heavy snow over parts of the Northeast and Canada.
Another January storm swept through the East Coast, resulting in thousands of flight cancellations and prompting the governors of New York and New Jersey to declare states of emergency.
In early February, another storm slammed parts of Texas with snow and sleet, disrupting travel and power. Gov. Greg Abbott called it “one of the most significant icing events that we’ve had in the state of Texas in at least several decades.”
Johnny Diaz contributed reporting.