A Tornado Watch has been issued for several counties in the D.C. area, including the District of Columbia.
The Watch includes the following jurisdictions
District of Columbia
Maryland: Anne Arundel, Calvert, Charles, Frederick, Howard, Montgomery, Prince George's and St. Mary's counties
Virginia: Arlington, Fairfax and Loudoun counties, cities of Alexandria, Fairfax and Falls Church
It runs until 10 p.m. A Tornado Watch indicates that conditions could occur that support formation of a tornado.