Severe · Special Marine WarningActive alert

Special Marine Warning issued September 2 at 1:15PM EDT until September 2

Affecting Tidal Potomac from Key Bridge to Indian Head MD; Tidal Potomac from Indian Head to Cobb Island MD

In effect until: Sep 2, 2026, 7:15 PM

Tidal Potomac from Key Bridge to Indian Head MD; Tidal Potomac from Indian Head to Cobb Island MD

Likely impact; effects through 7:15 PM.

Move to safe harbor immediately as gusty winds and high waves are expected.

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SMWLWX

The National Weather Service in Sterling Virginia has issued a

* Special Marine Warning for...
Tidal Potomac from Indian Head to Cobb Island MD...
Tidal Potomac from Key Bridge to Indian Head MD...

* Until 315 PM EDT.

* At 114 PM EDT, strong thunderstorms were located along a line
extending from near Fort Smallwood State Park to 16 nm north of Key
Bridge to 24 nm northwest of Tidal Basin to 31 nm northwest of
Reagan National Airport, moving south at 25 knots.

HAZARD...Wind gusts 34 knots or greater.

SOURCE...Radar indicated.

IMPACT...Boaters in small craft could be thrown overboard by
suddenly higher winds and waves capsizing their vessel.

* Locations impacted include...
Potomac Creek, Maryland Point, Nanjemoy Creek, Port Tobacco River,
Colonial Beach, Leesylvania State Park, National Harbor, Quantico,
Tidal Basin, Reagan National Airport, Swan Point, Gunston Hall,
Mathias Point, U.S. 301 Nice Memorial Bridge, Mason Neck State
Park, Woodrow Wilson Bridge, Indian Head, Occoquan Bay, Fort Hunt,
and Popes Creek.

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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™

Special Marine Warning issued September 2 at 1:15PM EDT until September 2

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