The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for... Southeastern Frederick County in north central Maryland... * Until 200 PM EDT. * At 111 PM EDT, a severe thunderstorm was located near Ballenger Creek, or 7 miles south of Harry Grove Stadium, moving northeast at 20 mph. HAZARD...60 mph wind gusts and quarter size hail. 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, Harry Grove Stadium, Ballenger Creek, Walkersville, New Market, Discovery-Spring Garden, Linganore-Bartonsville, Adamstown, Woodsboro, Buckeystown, Libertytown, Monrovia, Ijamsville, Mount Pleasant, Doubs, Park Mills and Tuscarora. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. By The National Weather Service