You might be right, but the line looks better now. The NWS has issued various marine warnings for the upper Chessy Bay.
04 PM EDT Sun Aug 1 2021
DCZ001-MDZ005-006-008-011-013-014-503>508-VAZ054-020200-
District of Columbia-Prince Georges-Central and Southeast
Howard-Southern Baltimore-Carroll-Northwest Montgomery-Northern
Baltimore-Anne Arundel-Central and Southeast Montgomery-Southeast
Harford-Cecil-Northwest Harford-Northwest Howard-Arlington/Falls
Church/Alexandria-
904 PM EDT Sun Aug 1 2021
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT THE NORTHERN DISTRICT
OF COLUMBIA...SOUTHEASTERN CARROLL...NORTHWESTERN ANNE ARUNDEL...
HOWARD...MONTGOMERY...HARFORD...NORTHERN CECIL...BALTIMORE...
NORTHWESTERN PRINCE GEORGES AND NORTH CENTRAL ARLINGTON COUNTIES AND
BALTIMORE CITY...
At 904 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Conowingo to near Jarrettsville to
Reisterstown to near Sykesville to near Damascus to near Boyds.
Movement was south at 25 mph.
Wind gusts of 40 to 50 mph are possible with these storms.
Locations impacted include...
Baltimore, Arlington, Columbia, Germantown, Rockville, Bethesda,
Gaithersburg, Bowie, Severn, Olney, Pikesville, College Park, Middle
River, Greenbelt, Cockeysville, Langley Park, Beltsville, Elkridge,
Damascus and Aberdeen.
These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.