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Severe Thunderstorm Watch Issued For Southern Maryland As Damaging Winds, Tornadoes Possible - The BayNet

Forecasters said damaging winds are the main threat, with a 30% to 44% chance of severe thunderstorm winds near some locations.

  • On Thursday, the National Weather Service Baltimore/Washington office issued a tornado watch for Southern Maryland, including Calvert, Charles, and St. Mary's counties, remaining in effect until 10 p.m.
  • A strong cold front moving through the region is triggering numerous thunderstorms, bringing risks of damaging wind gusts and potential flash flooding across Southern Maryland.
  • Forecasters estimate a 5% to 9% probability of tornadoes and a 30% to 44% chance of severe thunderstorm winds within 25 miles of a location.
  • Boaters on the Chesapeake Bay, Patuxent River, and tidal Potomac River should monitor conditions closely, as Special Marine Warnings are anticipated due to rapidly changing weather.
  • While storms may linger into the weekend, fair and tranquil weather is expected to return early next week as high pressure builds into the region.
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WBFF broke the news on Thursday, August 20, 2026.
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