The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for... Montgomery County in central Maryland... Southeastern Frederick County in north central Maryland... Eastern Loudoun County in northern Virginia... North central Fairfax County in northern Virginia... * Until 530 PM EDT. * At 442 PM EDT, a severe thunderstorm was located over Lansdowne, 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... Germantown, Rockville, Gaithersburg, Reston, Leesburg, Herndon, Damascus, Broadlands, Lansdowne, Lowes Island, Brambleton, Poolesville, Aspen Hill, Potomac, North Bethesda, Ashburn, Montgomery Village, Sterling, North Potomac and Redland. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building.
By The National Weather Service