Special Marine Warning — Gravel Point to Cape Cleare out to 15 NM; Southwest Prince William Sound was recorded by Global Incident Tracker on Sunday, 20 September 2026 at 08:45 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 20 at 12:45AM AKDT until September 20 at 1:15AM AKDT by NWS Anchorage AK SMWAFC The National Weather Service in Anchorage has issued a * Special Marine Warning for... Gravel Point to Cape Cleare out to 15 NM... Southwest Prince William Sound... * Until 115 AM AKDT. * At 1245 AM AKDT, Doppler radar indicated a severe thunderstorm capable of producing waterspouts, winds 34 knots or greater, and small hail. This storm was located 20 nm south-southeast of Hinchinbrook Entrance , moving west at 25 knots.
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 60.040°, -147.156°. 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 20 Sep 2026, 08:45 UTCFirst report Official warning
First recorded from 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. Copies of one syndicated story count as one report.
Conditions at the time
38.4 mm of rain fell that day, and the temperature peaked at 11°C, and winds reached 31 km/h. Conditions are shown for context only — they do not establish a cause.
Weather reanalysis for this location and date via Open-Meteo.