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Update: spring snowstorm may brush Philadelphia, Baltimore, and DC next week

National Weather Service forecast map
National Weather Service forecast map
Map courtesy National Weather Service

Temperatures this afternoon are in the mid 60s to near 70 under a mostly cloudy sky. Veiled sunshine can be expected through the rest of the day along with gusty winds as a cold front moves from west to east across the region. Colder and drier air will overspread the area later tonight with temperatures dropping into the upper 30s by Sunday morning, more than 30 degrees colder than today's highs. High pressure will briefly build over the Mid-Atlantic states resulting in plenty of sunshine on Sunday and Monday with highs in the mid to upper 40s on Sunday and the mid to upper 30s on Monday.

Our attention will then be focused on the south where computer models are indicating the potential for a spring snowstorm from Delmarva to New England. The trend of the computer models over the past two days is to keep this storm far enough off the eastern seaboard to keep the heaviest precipitation away from Baltimore and Washington, but impacting Philadelphia and eastern Delmarva with the potential for moderate snow, strong winds, and coastal flooding.

In this scenario, light snow may fall west of Chesapeake Bay from Tuesday afternoon into Tuesday evening with perhaps an inch or two accumulating by late Tuesday night. Philadelphia may receive a bit more snow on the order of 2 to 5 inches. Should this storm move 50 to 75 miles west of its current forecast track, the heavier snow would overspread central Maryland and southeastern Pennsylvania. As the center of low pressure moves to the northeast, its center will deepen rapidly and become a powerful nor'easter in southern New England where heavy snow can be expected from Connecticut through Maine.

Regional Weather Information

Baltimore average lows and highs

Washington average lows and highs

National Weather Service daily weather discussion

Baltimore/Washington National Weather Service

Philadelphia National Weather Service

Chesapeake Bay marine forecast

Mid-Atlantic radar loop

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