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All of the region is under either a winter storm warning or winter weather advisory through early Wednesday morning, with single-digit temperatures and snow in the forecast.
The National Weather Service says accumulating snow is expected to begin in the morning hours of Tuesday, increasing in intensity toward the afternoon. Snow showers are expected to continue overnight, at which time wind chill temperatures could fall below zero.
Accumulations of between one and three inches are expected in most locations, with between three and six inches in the higher terrain.
The NWS says that travel will likely be affected by the snowfall, with intensity heavy enough at times to substantially reduce visibility.
For the latest forecasts and special weather statements, visit the NWS.
The Associated Press reports heavy snow and frigid temperatures is forecast from Virginia to New England.
The National Weather Service says the storm could bring 10 inches of snow Tuesday to Philadelphia and New York and bitterly cold air with wind chills as low as 10 degrees below zero.
It warned of heavy winds and hazardous driving conditions throughout the day as the storm moves up the East Coast.
The federal government says its offices in the Washington area will be closed Tuesday because of the storm. The weather service warns the storm could impact the morning commute in Washington and Baltimore.
Schools in Pennsylvania, New Jersey, Connecticut and West Virginia are sending students home early on Tuesday or staying closed after the Martin Luther King Jr. Day holiday.