The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for... Southeastern Washington County in north central Maryland... Southwestern Frederick County in north central Maryland... Northeastern Loudoun County in northern Virginia... Southeastern Jefferson County in the Panhandle of West Virginia... * Until 315 PM EDT. * At 224 PM EDT, severe thunderstorms were located along a line extending from Corporation Of Ranson to Bluemont, moving northeast at 35 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles. * Locations impacted include... Frederick, Charles Town, Harry Grove Stadium, Ballenger Creek, Purcellville, Brunswick, Ranson, Braddock Heights, Round Hill, Harpers Ferry, Clover Hill, Point Of Rocks, Linganore-Bartonsville, Adamstown, Jefferson, Myersville, Lovettsville, Buckeystown, Shenandoah Junction and Hamilton. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. By The National Weather Service, Sterling. Va.