...FLASH FLOOD WATCH IN EFFECT UNTIL 3 AM EDT SUNDAY... THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF CENTRAL MARYLAND, THE DISTRICT OF COLUMBIA, VIRGINIA, AND WEST VIRGINIA, INCLUDING THE FOLLOWING AREAS, IN CENTRAL MARYLAND, CENTRAL AND SOUTHEAST MONTGOMERY, NORTHWEST MONTGOMERY, AND PRINCE GEORGES. THE DISTRICT OF COLUMBIA. IN VIRGINIA, ARLINGTON/FALLS CHURCH/ALEXANDRIA, AUGUSTA, CENTRAL VIRGINIA BLUE RIDGE, CLARKE, CULPEPER, EASTERN LOUDOUN, FAIRFAX, FREDERICK, GREENE, MADISON, NORTHERN FAUQUIER, NORTHERN VIRGINIA BLUE RIDGE, PAGE, PRINCE WILLIAM, RAPPAHANNOCK, ROCKINGHAM, SHENANDOAH, SOUTHERN FAUQUIER, WARREN, AND WESTERN LOUDOUN. IN WEST VIRGINIA, BERKELEY, HAMPSHIRE, HARDY, JEFFERSON, AND MORGAN. * UNTIL 3 AM EDT SUNDAY * THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE THIS EVENING AND CONTINUE FOR SOME AREAS INTO TONIGHT. SLOW MOVING AND REPETITIVE THUNDERSTORMS WITH LOCALLY HEAVY RAINFALL OF...