* Severe Thunderstorm Warning for... Carroll County in north central Maryland... Northwestern Harford County in northern Maryland... East central Frederick County in north central Maryland... Northwestern Baltimore County in northern Maryland... * Until 915 PM EDT. * At 826 PM EDT, a severe thunderstorm was located near Mount Airy, or 11 miles northeast of Damascus, moving northeast at 50 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, Eldersburg, Mount Airy, Hampstead, Manchester, Sykesville, Gamber, New Windsor, Union Bridge, Finksburg, Carrollton, Freeland, Upperco, Winfield, Norrisville, Louisville, Bentley Springs, Linwood, Uniontown and Unionville. PRECAUTIONARY/PREPAREDNESS ACTIONS... Get indoors to protect yourself from wind and lightning. Trees around you may be downed from damaging winds, so if you are near large trees, move to an interior room on the lowest floor. Don`t drive underneath trees or in wooded areas until the threat has passed. By The National Weather Service