Special Marine Warning — Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM; Coastal waters from Fernandina Beach to St. Augusti was recorded by Global Incident Tracker on Friday, 11 September 2026 at 21:35 UTC. The event is classified as a storm incident with a severity rating of Severe, and was detected through the US National Weather Service (NWS).
Special Marine Warning issued September 11 at 5:35PM EDT until September 11 at 6:30PM EDT by NWS Jacksonville FL SMWJAX The National Weather Service in Jacksonville has issued a * Special Marine Warning for... Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM... Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM... * Until 630 PM EDT. * At 534 PM EDT, strong thunderstorms were located along a line extending from 16 nm west of Altamaha Sound to 19 nm west of Saint Augustine, moving east at 20 knots. HAZARD...Wind gusts 34 knots or greater. SOURCE...Radar. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. * Locations impacted include... High Point, Nassau Sound Approach Buoy 6a, Buoy F, Vilano Beach, St Simons Island Village, Palm Valley, St. Simons Island, Talbot Island, Saint Andrews Sound, Saint Johns Light
Where this happened
The incident is located in United States (North America), whose capital is Washington, D.C.. Historically, United States is most affected by hurricanes, wildfires, tornadoes, earthquakes and floods. You can follow every incident recorded in this country, updated live, on the United States incident tracker.
Approximate coordinates of the reported event are 30.644°, -81.309°. The marker on the map above shows this position; for news-derived reports the location reflects the place named in media coverage and may represent a district or city rather than an exact site.
Understanding storm events
Severe thunderstorms, windstorms, hail and winter storms. Severe storms combine wind, lightning, hail and sudden downpours. Secondary effects — falling trees, power line damage and flash flooding on roads — cause the majority of injuries.
How severity is rated
Global Incident Tracker rates every event on a four-step scale — Minor, Moderate, Severe and Extreme — derived from the source signal: earthquake magnitude, official GDACS alert colour, or the volume of independent media reporting for news-derived incidents. This event is currently rated Severe. Ratings can change as more information becomes available, and a rating is a monitoring signal rather than an official government assessment.
Safety guidance for storm situations
- Move indoors and away from windows; avoid sheltering under trees.
- Unplug sensitive electronics and avoid using wired equipment during lightning.
- Assume every downed power line is live and keep well clear.
- Do not drive through flooded underpasses.
- Follow only official instructions from local authorities and emergency services — this page is a monitoring record, not an emergency alert.
Data and verification
This record was generated automatically from the US National Weather Service (NWS) and de-duplicated against our archive. Early reports for any incident can be revised: locations get refined, magnitudes are recalculated and impact figures change as assessments arrive. We deliberately do not publish casualty numbers unless an official source states them. The original source report is linked at the top of this page.
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Timeline and sources
Official warning
Issued by U.S. National Weather Service. A warning or forecast describes a hazard; on its own it is not a report that harm occurred.
How statuses are decided · the number of reports is never treated as confirmation.
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· received · event time 11 Sep 2026, 21:35 UTCFirst report Official warning
First recorded from U.S. National Weather Service.
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· receivedAlso reported (2) Official warning
2 more reports from U.S. National Weather Service, received between 11 Sep 22:35 and 12 Sep 05:39 UTC. Reports from one feed are often copies of the same story, so they are not counted as independent confirmation. Links were not kept for reports merged before 13 September 2026.
U.S. National Weather Service
Times are when this site received each report, in UTC; the event time is shown where the source gave one. 3 reports are attached to this incident. Copies of one syndicated story count as one report.
Conditions at the time
Heavy rainfall of 154 mm was recorded that day, and the temperature peaked at 29°C. Conditions are shown for context only — they do not establish a cause.
Weather reanalysis for this location and date via Open-Meteo.