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NWS Key West FLMA.W 0244September 10, 2026

Special Marine Warning: Gulf of America 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

The National Weather Service office in Key West issued a special marine warning for Gulf of America 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 and Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef, which was in force until 7:45 p.m. local time on September 10. It was the 244th special marine warning the NWS office in Key West issued in 2026.

ExpiredWarning

Issued7:10 p.m. EDT, September 10, 2026
In force7:10 p.m. EDT, September 10, 2026
Expired7:45 p.m. EDT, September 10, 2026

In force for 35 minutes; it has expired. The agency may have replaced it with a new notice.

The notice

Issued by
National Weather Service, Key West FL
Area
Gulf of America 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 and Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef
Level
Warning
Issued
7:10 p.m. EDT, September 10, 2026
Expires
7:45 p.m. EDT, September 10, 2026
CAP severity, certainty, urgency
Severe, Likely, Immediate
VTEC event
KKEY MA.W 0244
Official source
National Weather Service: the notice at its source

NWS notices, September 2026The latest from the National Weather Service

Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.

The notice as issued

SMWKEY The National Weather Service in Key West has issued a * Special Marine Warning for... 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... Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef... * Until 745 PM EDT. * At 709 PM EDT, a strong thunderstorm was located near Smith Shoal Light, moving west at 10 knots. HAZARD...Wind gusts 34 knots or greater. SOURCE...Radar. IMPACT...Expect wind gusts in excess of 34 knots, suddenly higher waves, frequent lightning, and heavy downpours. * Locations in the warning include... Marquesas Keys, Smith Shoal Light, Ellis Rock Light, and Cottrell Key.

What the agency told people to do

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.

Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.

The record around this notice