Severe Thunderstorm Watchfrom MON 1:15 PM EDT until MON 9:00 PM EDT, City of Fredericksburg, Fauquier County, City of Manassas, Prince William County, City of Alexandria, Stafford County, City of Fairfax, Fairfax County, Arlington County, Anne Arundel County, Montgomery County, Charles County, Prince Georges County, Carroll County, Frederick County, District of Columbia, Grant County