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Warning

Special Marine Warning

Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM; Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out

Ended Oct 18, 4:45 AM EDT

Waterspout possibleMoving south at 7 mph
10 MI
10 MI
Map of the Special Marine Warning over Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM, with the area it draws around the storm. Drawn on the national sheet; the scale is at its foot.
In force from
Oct 18, 4:21 AM EDT
Until
Oct 18, 4:45 AM EDT
Issued
Oct 18, 4:21 AM EDT
Office
Key West, FL
Number
332 of its kind from this office this year
Severity
Severe
Storm motion
Moving south at 7 mph
Where
Gulf of America waters

The National Weather Service in Key West has issued a

* Special Marine Warning for... Straits of Florida from Halfmoon Shoal to 20 nm west of Dry Tortugas out 60 nm...

* Until 445 AM EDT.

* At 421 AM EDT, a strong thunderstorm with possible waterspouts was located 20 nm southeast of Tortugas Ecological Reserve South, moving south at 5 knots.

Hazard
Waterspouts and wind gusts 34 knots or greater.
Source
National Weather Service Meteorologist.
Impact
Waterspouts can quickly form and capsize boats, cause considerable damage to vessels and create suddenly higher waves. Expect wind gusts in excess of 34 knots, suddenly higher waves, frequent lightning, and heavy downpours.

* The strong thunderstorm will remain over mainly open waters.

What 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.

Read the platesWaterspout FB-EVT-012How to read a warning FB-STN-001

On the radarForecast gusts over itRadar

Also in force nearby

Every warning of October 18, 2026Every severe alert in force