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Severe · Special Marine WarningThis alert has expired. It is kept for reference.

Special Marine Warning issued September 10 at 7:48AM EDT until September 10

Affecting Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms; Gulf of America including Dry Tortugas and Rebecca Shoal Channel; Gulf of America from West End of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms; Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef; Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM

In effect until: Sep 10, 2026, 12:15 PM

Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms; Gulf of America including Dry Tortugas and Rebecca Shoal Channel; Gulf of America from West End of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms; Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef; Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM

Likely impact; effects through 12:15 PM.

Prepare for wind gusts in excess of 34 knots, steep and fast-building seas, frequent lightning, and blinding downpours. Stay low or go below, and make sure all on board are wearing life jackets.

Read the original bulletin (official text)
SMWKEY

The National Weather Service in Key West has issued a

* Special Marine Warning for...
Hawk Channel and Straits of Florida from west end of Seven Mile
Bridge to Halfmoon Shoal out 20 nm...
Gulf Waters from East Cape Sable to Chokoloskee 20 to 60 nm out and
beyond 5 fathoms...
Gulf of America from west end of Seven Mile Bridge to Halfmoon
Shoal out to 5 fathoms...
Gulf of America including Dry Tortugas and Rebecca Shoal Channel...

* Until 815 AM EDT.

* At 748 AM EDT, a strong thunderstorm was located over Halfmoon
Shoal Light, moving northwest at 10 knots.

HAZARD...Wind gusts 34 knots or greater.

SOURCE...National Weather Service Meteorologist.

IMPACT...Expect wind gusts in excess of 34 knots, suddenly higher
waves, frequent lightning, and heavy downpours.

* Locations in the warning include...
Rebecca Shoal Light, New Ground Rocks Light, and Halfmoon Shoal
Light.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™