A winter storm has hit the eastern coast of the United States, possibly causing chaos in night commuting in New York City. Air travel on the East Coast has been hampered and some federal offices in Washington have been closed.
Early in the afternoon, snow turned into sleet, causing slippery roads in New York City, causing a number of minor car crashes and traffic congestion.
Bryan Jackson, a meteorologist at the University of Maryland's Parker Weather Forecast Center, said the wide-ranging weather system snows up to six inches (15 centimeters) across Washington and then becomes a sleet.
The deepest seven inches of snow cover Greenscastle, south-central Pennsylvania.
Forecasters say that by night, winter storms will enter the Boston area, where only two inches of snow are expected at night, and then commuting time will gradually weaken in the morning.
Elsewhere in the United States, Jackson said, a storm system could bring one foot (30 centimeters) to two feet of snow to the Four Corners. The region is the junction of Arizona, Colorado, New Mexico and Utah.
A third weather system, which brings heavy rains to the southeast, is expected to continue until the end of this week, triggering flood warnings.
According to Flightaware.com, hundreds of inbound and outbound flights at major airports in Washington, New York, Philadelphia and Chicago have been delayed or cancelled. The airport tells passengers on social media to inquire about airline flight delays and cancellations.
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