Severe Severe Storm ● Closed

Special Marine Warning — Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park; Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM

Event time: Last updated: Sep 6, 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.

Special Marine Warning issued July 26 at 9:29PM EDT until July 26 at 10:30PM EDT by NWS Marquette MI

Measurements

Coordinates47.8480, -88.2820
RegionLake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park; Lake
Expires2026-07-26T22:30:00-04:00
Nws UrgencyImmediate
Nws CertaintyLikely

Official source

Weather alert data courtesy of NOAA / National Weather Service

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 US National Weather Service.

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Source updated 84 days ago (Jul 27, 2026 02:20 UTC) · we last heard from US National Weather Service 23 seconds ago

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