Special Marine Warning Issued for Lake Superior
This alert is no longer in effect.
NOAA issued it on August 7, 2026, 2 weeks ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS Marquette has issued a Special Marine Warning for portions of Lake Superior until 6:00 PM EDT due to a strong thunderstorm producing wind gusts of 34 knots or greater.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Lake Superior
- Issued
- August 7, 2026
- Issuing authority
- NWS Marquette MI
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: historical. It was issued 2 weeks ago; use the issuing agency's live warning service for current conditions in Lake Superior.
Alert Details
A Special Marine Warning has been issued by the National Weather Service in Marquette MI. The alert is effective from August 7, 2026 at 4:58 PM EDT until August 7, 2026 at 6:00 PM EDT.
Affected Areas
The warning covers Saxon Harbor WI to Black River MI; Black River to Ontonagon MI; Ontonagon to Upper Entrance of Portage Canal MI; and Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM offshore to the US/Canadian border including Isle Royale National Park.
What You Should Do
Small craft could be damaged in briefly higher winds and suddenly higher waves. The strong thunderstorm will remain over mainly open waters.
Expected Conditions
At 4:57 PM EDT, a strong thunderstorm was located 35 nm south of The Western Lake Superior Buoy, moving northeast at 35 knots. Hazard includes wind gusts 34 knots or greater.
Timeline
The alert is in effect from 4:58 PM EDT to 6:00 PM EDT on August 7, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
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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 (955 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to August 7, 2026.
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Common questions about this NWS weather alert.