Special Marine Warning Issued for Lake Superior Areas Near Duluth
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NWS Duluth has issued a Special Marine Warning for multiple Lake Superior zones until 6:45 PM CDT due to a strong thunderstorm with wind gusts 34 knots or greater and small hail.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Lake Superior near Duluth MN and Superior WI
- Issued
- August 25, 2026
- Issuing authority
- NWS Duluth MN
Marine notices apply to named waters or shoreline zones. They may not describe conditions on land, even when the nearest place name is the same.
Record status: publication date is recent, but current status is not stored on this page. Check the issuing agency's live warning service before acting because warnings can be updated, narrowed, or cancelled.
Alert Details
A Special Marine Warning has been issued by the National Weather Service in Duluth MN. The alert is effective from August 25, 2026 at 5:21 PM CDT until August 25, 2026 at 6:45 PM CDT.
Affected Areas
The warning covers Silver Bay Harbor to Two Harbors MN; Two Harbors to Duluth MN; Duluth MN to Port Wing WI; Port Wing to Sand Island WI; and Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM. Locations impacted include Two Harbors Protected Access Agate Bay, Knife River Marina, Brule Point, McQuade Harbor, Larsmont, Duluth Harbor, Duluth Lift Bridge Channel, Stoney Point, French River, and Superior Entry.
What You Should Do
Small craft could be damaged in briefly higher winds and suddenly higher waves. Avoid the area.
Expected Conditions
At 5:20 PM CDT, a strong thunderstorm was located 14 nm northwest of Duluth Lift Bridge Channel, moving east at 20 knots. Hazard includes wind gusts 34 knots or greater and small hail.
Timeline
The alert is in effect from 5:21 PM CDT to 6:45 PM CDT on August 25, 2026.
Original source: NOAA Official Notice ↗
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Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,076 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to August 25, 2026.
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