Coastal Flood Advisory issued September 20 at 10:21AM EDT until September 21 at 12:00AM EDT by NWS

...COASTAL FLOOD ADVISORY NOW IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... * LOCATIONS...SHORELINE IN THE DISTRICT OF COLUMBIA AND ARLINGTON COUNTY AND THE CITY OF ALEXANDRIA. * TIDAL DEPARTURE...AROUND 1 TO 1.5 FEET ABOVE NORMAL. * TIMING...AROUND HIGH TIDE THIS EVENING. HIGH TIDE AT WASHINGTON

from Current Watches, Warnings and Advisories for the United States Issued by the National Weather Service http://ift.tt/2yp8nLP