The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for... North central Frederick County in north central Maryland... * Until 345 PM EDT. * At 258 PM EDT, a severe thunderstorm was located over Thurmont, and is nearly stationary. 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... Thurmont, Emmitsburg, Woodsboro, Sabillasville, Fort Ritchie, Rocky Ridge, New Midway, Utica, Graceham and Lewistown. 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.