Special Marine Warning Issued for Western Lake Superior Areas
This alert is no longer in effect.
NOAA issued it on April 17, 2026, 4 months 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.
A Special Marine Warning from NWS Duluth MN affects regions along Lake Superior, with strong thunderstorms bringing wind gusts of 34 knots or greater and small hail until 4:00 PM CDT on April 17, 2026.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Western Lake Superior
- Issued
- April 17, 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: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Western Lake Superior.
Special Marine Warning Alert
Alert Details
This Special Marine Warning was issued by the National Weather Service (NWS) Duluth MN. It is effective from 3:05 PM CDT on April 17, 2026, until 4:00 PM CDT on the same day.
Affected Areas
The warning affects the following regions: 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.
What You Should Do
Move to safe harbor until the hazardous weather passes.
Expected Conditions
Strong thunderstorms will bring wind gusts of 34 knots or greater and small hail. The storms are moving northeast at 50 knots.
Timeline
The alert is effective from 3:05 PM CDT on April 17, 2026, and will expire at 4:00 PM CDT on April 17, 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 (842 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to April 17, 2026.
Frequently Asked Questions
Common questions about this NWS weather alert.