Severe Severe Storm ● Closed

Special Marine Warning issued September 10 at 7:48AM EDT until September 10 at 8:15AM EDT by NWS Key West FL, United States of America

Event time: Sep 10, 2026 11:48 UTC Last updated: Sep 19, 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...
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.

Measurements

Coordinates	24.5780, -82.4760
Region	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;
Location Precision	polygon
Issuing Authority	United States of America — us-noaa-nws-en-marine
Cap Urgency	Immediate
Cap Certainty	Likely
Cap Expires	2026-09-10T08:15:00-04:00

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

Also reported by: NWS

This event as JSON · API and licence

Source updated 39 days ago (Sep 10, 2026 11:49 UTC) · we last heard from WMO Alert Hub (national weather services) 56 seconds ago

On a slow connection? Low-bandwidth version — no map, no scripts, under 14 KB.

Official authorities in United States

If you are there, these are the bodies whose instructions apply. This site is not an emergency service and does not issue warnings.

More for United States →

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 — Delaware, IN; Madison, IN; Randolph, IN Severe Severe Storm United States closed via NWS Aug 11, 2026 Severe Thunderstorm Warning — Coshocton, OH; Guernsey, OH; Muskingum, OH; Tuscarawas, OH Severe Severe Storm United States closed via NWS Aug 11, 2026 Severe Thunderstorm Warning — Elkhart, IN; Kosciusko, IN; Noble, IN Severe Severe Storm United States closed via NWS Aug 11, 2026 Severe Thunderstorm Warning — Holmes, OH; Stark, OH; Wayne, OH Severe Severe Storm United States closed via NWS Aug 11, 2026

Nearby & related events

Flood Warning — Lake, FL; Volusia, FL Severe Flood United States active via NWS 8 hr ago Flood Warning — Lake, FL; Volusia, FL Severe Flood United States active via NWS 21 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 21 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.