The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for... Carroll County in north central Maryland... Northeastern Frederick County in north central Maryland... * Until 545 PM EDT. * At 459 PM EDT, a severe thunderstorm was located near Thurmont, moving east 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... Westminster, Taneytown, Hampstead, Walkersville, Manchester, New Windsor, Woodsboro, Union Bridge, Libertytown, Carrollton, New Midway, Linwood, Uniontown, Keysville, Lineboro, Ladiesburg, Rocky Ridge, Patapsco, Reese and Detour. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. For your protection move to an interior room on the lowest floor of a building. By The National Weather Service