It includes Frederick and surrounding jurisdictions.
From the National Weather Service:
TORNADO WATCH 350 IS IN EFFECT UNTIL 1200 AM EDT FOR THE FOLLOWING LOCATIONS MDC003-005-009-011-013-015-017-019-021-025-027-029-031-033-035- 037-039-041-043-045-047-510-310400- /O.NEW.KWNS.TO.A.0350.250530T2055Z-250531T0400Z/ MD . MARYLAND COUNTIES INCLUDED ARE ANNE ARUNDEL BALTIMORE CALVERT CAROLINE CARROLL CECIL CHARLES DORCHESTER FREDERICK HARFORD HOWARD KENT MONTGOMERY PRINCE GEORGES QUEEN ANNE`S SOMERSET ST. MARYS TALBOT WASHINGTON WICOMICO WORCESTER MARYLAND INDEPENDENT CITIES INCLUDED ARE BALTIMORE CITY By The National Weather Service, Sterling, Va.