Watch, Advisory Issued Ahead of Snow

Tuesday, Jan 11, 2011  |  Updated 6:47 AM EDT
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Get the latest weather forecast from <a title=Veronica Johnson." />

Get the latest weather forecast from Veronica Johnson.

Winter storm watches have been issued for parts of the Washington region as the next storm develops and heads our way.

A winter storm watch has been issued from Tuesday afternoon through late Tuesday night for Prince George's, Anne Arundel and Howard counties and further north. A winter weather advisory was issued for areas south of D.C.

A developing low pressure system will move along the Atlantic coastline during the day on Tuesday. This storm will likely bring a combo of snow and sleet to our region beginning Tuesday afternoon and continue off and on through the evening, possibly into Wednesday.

By 2 p.m., light snow should move into the D.C. area, NBC Washington meteorologist Veronica Johnson reported. Before that, pockets of precipitation could occur in parts of the area. Between 6 p.m. and 9 p.m., parts of the area could see moderate snowfall. By 5 a.m. Wednesday, the snowfall should be moving out of the area as low pressure moves up the coast.

Total amounts of snow and sleet around the metro area are likely to be between 1-4 inches -- 2-3 inches of snow in D.C. and its immediate suburbs, 3-4 inches of snow north of the city and 1-2 inches of snow and sleet south of the city.

If the storm does track as usual a little farther east, we may not see those higher amounts of snow.

It's important to pay close attention to the forecast Monday night and Tuesday morning because any change in track and intensity of the storm will bring big changes to the amounts of snow that we may get.

In any case, there may be widespread school delays and closings Wednesday morning.

Because of temperatures that may be around or below freezing, any snow or sleet could stick, making driving conditions hazardous.

Another low pressure system from the Midwest could send a nor'easter up the coast, Johnson said, dumping more snow on Philadelphia, New York and New England than what's expected to fall in the D.C. area.

The storm should exit our area late Tuesday night or Wednesday morning and head toward New York City and southern New England. It could snarl air travel and traffic in those areas.

For us, once the storm moves out, the cold pattern will continue. There will be colder than average temperatures through next weekend with no warm-up in sight.


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