STERLING, Va. -- A tornado watch remains in effect until 1 a.m. for the entire Washington region.

A severe thunderstorm warning for Fredericksburg, King George County, east central Spotsylvania County and southeastern Stafford County in Virginia remain in effect until 9:30 p.m.

At 8 p.m., radar indicated a line of severe thunderstorms extending from 10 miles west of Dahlgren to Massaponax and moving east at 30 mph.

Earlier Storms Pound Area

There were two unconfirmed reports Wednesday of tornadoes touching down in the Washington region as a line of extremely strong storms blew through the area during the afternoon.

Trained spotters reported tornadoes touching down in both the Huntington area of Fairfax County, Va., and in the Huntingtown area of Calvert County, Md., at 3:45 p.m.

Forecast

The cluster of storms that swept through the D.C. area on Wednesday afternoon produced damaging winds, hail, flooding, heavy rain and possible tornadoes, News4 chief meteorologist Bob Ryan said.

Related: Interactive Radar | Watch Live Weather Plus Video | Latest Conditions And Forecast | Weather Alerts By E-Mail Storm Brings Down Wires, Trees In D.C. Area | Weather Graphics Tom Kierein's Forecast

Thursday is expected to be partly cloudy with possible storms in the afternoon. This weekend will be hot and humid, Ryan said.

Stay with News4 and nbc4.com for more information.

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