The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for... Northeastern Washington County in north central Maryland... Northwestern Frederick County in north central Maryland... * Until 330 PM EDT. * At 238 PM EDT, a severe thunderstorm was located near Claylick, or 11 miles east of Hancock, moving southeast at 30 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... Hagerstown, Municipal Stadium, Robinwood, Fountainhead-Orchard Hills, Boonsboro, Smithsburg, Paramount-Long Meadow, Wilson-Conococheague, Williamsport, Mount Aetna, Mount Lena, San Mar, Long Meadow, Wolfsville, Saint James, Halfway, Maugansville, Myersville, Cavetown and Funkstown. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Large hail and damaging winds and continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature`s leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. By The National Weather Service