Strong onshore flow, in addition to high amounts of freshwater from heavy rain, led to increased water level anomalies and coastal flooding along the Potomac River.

Coastal Flood in DISTRICT OF COLUMBIA, DISTRICT OF COLUMBIA
From 10-SEP-18 06:05:00 to 10-SEP-18 09:23:00 (EST-5)
Reported by: River/Stream Gage

The gauge at Wisconsin Avenue (GTND2) indicated moderate flooding. At this stage, Washington Harbour begins to flood if floodgates are not in place. More than a third of Roosevelt Island is also covered by water.

Coastal Flood in DISTRICT OF COLUMBIA, DISTRICT OF COLUMBIA
From 10-SEP-18 18:29:00 to 11-SEP-18 00:58:00 (EST-5)
Reported by: River/Stream Gage

The gauge at Wisconsin Avenue (GTND2) indicated moderate flooding. At this stage, Washington Harbour begins to flood if floodgates are not in place. More than a third of Roosevelt Island is also covered by water.

Coastal Flood in DISTRICT OF COLUMBIA, DISTRICT OF COLUMBIA
From 11-SEP-18 05:19:00 to 12-SEP-18 02:46:00 (EST-5)
Reported by: River/Stream Gage

The gauge at Wisconsin Avenue (GTND2) indicated moderate flooding. At this stage, Washington Harbour begins to flood if floodgates are not in place. More than a third of Roosevelt Island is also covered by water and backwater flooding of Rock Creek in Georgetown begins.

Coastal Flood in DISTRICT OF COLUMBIA, DISTRICT OF COLUMBIA
From 12-SEP-18 08:22:00 to 12-SEP-18 11:13:00 (EST-5)
Reported by: River/Stream Gage

The gauge at Wisconsin Avenue (GTND2) indicated moderate flooding. At this stage, Washington Harbour begins to flood if floodgates are not in place. More than a third of Roosevelt Island is also covered by water.

Coastal Flood in DISTRICT OF COLUMBIA, DISTRICT OF COLUMBIA
From 09-SEP-18 17:03:00 to 09-SEP-18 21:09:00 (EST-5)
Reported by: River/Stream Gage

The gauge at Southwest Waterfront (WASD2) indicated moderate flooding. At this stage, the unprotected area on the southwest waterfront at the DC seafood market begins to flood. Water also approaches parts of the Hains Point Loop Road.

Coastal Flood in DISTRICT OF COLUMBIA, DISTRICT OF COLUMBIA
From 10-SEP-18 05:22:00 to 10-SEP-18 10:08:00 (EST-5)
Reported by: River/Stream Gage

The gauge at Southwest Waterfront (WASD2) indicated moderate flooding. At this stage, the unprotected area on the southwest waterfront at the DC seafood market begins to flood. Water also approaches parts of the Hains Point Loop Road.

Coastal Flood in DISTRICT OF COLUMBIA, DISTRICT OF COLUMBIA
From 10-SEP-18 18:25:00 to 10-SEP-18 23:01:00 (EST-5)
Reported by: River/Stream Gage

The gauge at Southwest Waterfront (WASD2) indicated moderate flooding. At this stage, the unprotected area on the southwest waterfront at the DC seafood market begins to flood. Water also approaches parts of the Hains Point Loop Road.

Coastal Flood in DISTRICT OF COLUMBIA, DISTRICT OF COLUMBIA
From 11-SEP-18 06:21:00 to 11-SEP-18 12:27:00 (EST-5)
Reported by: River/Stream Gage

The gauge at Southwest Waterfront (WASD2) indicated moderate flooding. At this stage, the unprotected area on the southwest waterfront at the DC seafood market begins to flood. Water also approaches parts of the Hains Point Loop Road.

Coastal Flood in DISTRICT OF COLUMBIA, DISTRICT OF COLUMBIA
From 11-SEP-18 19:33:00 to 12-SEP-18 00:00:00 (EST-5)
Reported by: River/Stream Gage

The gauge at Southwest Waterfront (WASD2) indicated moderate flooding. At this stage, the unprotected area on the southwest waterfront at the DC seafood market begins to flood. Water also approaches parts of the Hains Point Loop Road.

Coastal Flood in DISTRICT OF COLUMBIA, DISTRICT OF COLUMBIA
From 12-SEP-18 09:30:00 to 12-SEP-18 10:00:00 (EST-5)
Reported by: River/Stream Gage

The gauge at Southwest Waterfront (WASD2) indicated moderate flooding. At this stage, the unprotected area on the southwest waterfront at the DC seafood market begins to flood. Water also approaches parts of the Hains Point Loop Road.

Coastal Flood in DISTRICT OF COLUMBIA, DISTRICT OF COLUMBIA
From 09-SEP-18 18:21:00 to 09-SEP-18 19:30:00 (EST-5)
Reported by: River/Stream Gage

The gauge at Wisconsin Avenue (GTND2) indicated moderate flooding. At this stage, Washington Harbour begins to flood if floodgates are not in place. More than a third of Roosevelt Island is also covered by water.