Severe Severe Storm ● Closed

Special Marine Warning issued September 12 at 4:18PM EDT until September 12 at 5:15PM EDT by NWS Key West FL, United States of America

Event time: Sep 12, 2026 20:18 UTC Last updated: Sep 21, 2026 United States

Icon = what happened · ring colour = how serious: Extreme Severe Moderate Minor

Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.

SMWKEY

The National Weather Service in Key West has issued a

* Special Marine Warning for...
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 515 PM EDT.

* At 418 PM EDT, a strong thunderstorm with possible waterspouts was
located near Ninefoot Shoal. The strong thunderstorm was nearly
stationary.

HAZARD...Waterspouts and wind gusts 34 knots or greater.

SOURCE...Radar.

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.

* Locations in the warning include...
Cudjoe Bay, Little Knockemdown Key, Big Munson Island, Ninefoot
Shoal, and Toptree Hammock Key.

Measurements

Coordinates	24.6754, -81.5092
Region	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 ou
Location Precision	polygon
Issuing Authority	United States of America — us-noaa-nws-en-marine
Cap Urgency	Immediate
Cap Certainty	Likely
Cap Expires	2026-09-12T17:15:00-04:00

Official source

Warnings courtesy of the issuing national meteorological service, via the WMO Alert Hub.

This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.

Severity as published by WMO Alert Hub (national weather services).

View original report

This event as JSON · API and licence

Source updated 37 days ago (Sep 12, 2026 20:20 UTC) · we last heard from WMO Alert Hub (national weather services) 20 seconds ago

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Official authorities in United States

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Earlier severe storm events in United States

Severe and extreme events of the same kind, before this one. Listed for scale, not because they are connected to it.

Severe Thunderstorm Warning — Greenville, SC; Laurens, SC Severe Severe Storm United States closed via NWS Aug 13, 2026 Severe Thunderstorm Warning — Edgar, IL; Vermilion, IL Severe Severe Storm United States closed via NWS Aug 13, 2026 Severe Thunderstorm Warning — Washington, UT Severe Severe Storm United States closed via NWS Aug 13, 2026 Severe Thunderstorm Warning — Berrien, GA; Irwin, GA; Tift, GA Severe Severe Storm United States closed via NWS Aug 13, 2026

Nearby & related events

Flood Warning — Lake, FL; Volusia, FL Severe Flood United States active via NWS 10 hr ago Flood Warning — Lake, FL; Volusia, FL Severe Flood United States active via NWS 23 hr ago Special Marine Warning — Hawk Channel from Ocean Reef to Craig Key out to the reef; Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef; Straits of Florida from Ocean Reef to Craig Key out 20 NM; Straits of Florida from Craig Severe Severe Storm United States active via NWS 23 hr ago Special Marine Warning — Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound; Bayside and Gulfside from Craig Key to West End of Seven Mile Bridge; Hawk Channel from Ocean Reef to Craig Key out to the reef; Hawk Channel from Cr Severe Severe Storm United States active via NWS 1 day ago Flood Warning — Lake, FL; Volusia, FL Severe Flood United States active via NWS 1 day ago

Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.