...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT FOR SOUTHEASTERN CARROLL COUNTY IN NORTH CENTRAL MARYLAND...NORTHWESTERN HOWARD...NORTH CENTRAL MONTGOMERY COUNTIES IN CENTRAL MARYLAND AND SOUTHEASTERN FREDERICK COUNTIES IN NORTH CENTRAL MARYLAND... At 313 PM EDT, a severe thunderstorm was located over Green Valley, or near Damascus, moving northeast at 35 mph. HAZARD...70 mph wind gusts. SOURCE...Radar indicated and observed. A wind gust to 58 mph was measured in Frederick. 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, Westminster, Damascus, Eldersburg, Mount Airy, Walkersville, Sykesville, Oakland, New Market, Gamber, Discovery-Spring Garden, Green Valley, Linganore-Bartonsville, Clarksburg, New Windsor, Libertytown, Monrovia, Henryton, Winfield and Louisville. 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, Md