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Severe weather possible on Wednesday for Philadelphia, Baltimore, Washington

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

The National Weather Service's Storm Prediction Center has issued a forecast calling for the potential of severe storms on Wednesday in Philadelphia, Baltimore, and Washington. These cities are in the "slight" risk category, which means that any severe storms that develop will not be widespread.

A cold front attached to a strong area of low pressure will sweep across the Middle Atlantic states on Wednesday and Wednesday night. Warm, moist, unstable air ahead of the front will cause the air to become unstable when the colder, drier air behind the front clashes with the air mass already in place over the region. The convective development will produce widespread showers with isolated thunderstorms. As indicated above, isolated storms may reach the severe stage. Tornadoes are not expected, but a tornado watch may need to be issued depending on the ultimate development of these conditions during the day on Wednesday.

By later Wednesday evening, the cold front will progress eastward and the chance of severe weather will decrease dramatically. The air behind the front will be significantly colder with temperatures dropping from the 60s and 70s on Wednesday afternoon into the 20s and 30s by Thursday morning. Highs on Thursday will only reach the 30s on Thursday and Friday. The average high for this time of year is in in the upper 40s around Philadelphia to the lower 50s in Washington DC.

Here are forecasts for specific locations around the Middle Atlantic states:

NWS forecast for Philadelphia, PA

NWS forecast for Baltimore, MD

NWS forecast for Washington, DC

NWS forecast for Richmond, VA

For more weather updates, please visit my web site, my Chesapeake Bay Weather page on Facebook, and if you're heading to Ocean City feel free to check out my Ocean City MD Weather page on Facebook. You can also follow me on Twitter @chesbayweather.

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