Special Marine Warning Issued for Lake Superior Areas
This alert is no longer in effect.
NOAA issued it on April 25, 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 is in effect for various Lake Superior regions until 5:15 PM CDT on April 17, 2026, due to strong thunderstorms with wind gusts of 34 knots or greater and small hail.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Western Lake Superior
- Issued
- April 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: 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 for Lake Superior
Alert Details
A Special Marine Warning has been issued by the National Weather Service in Duluth, MN. It is effective from 4:17 PM CDT on April 17, 2026.
Affected Areas
The warning affects the following regions: Chequamegon Bay-Bayfield to Oak Point WI; Grand Portage to Grand Marais MN; Grand Marais to Taconite Harbor MN; Taconite Harbor to Silver Bay Harbor MN; Port Wing to Sand Island WI; Sand Island to Bayfield WI; Oak Point to Saxon Harbor WI; Outer Apostle Islands Beyond 5 NM from Mainland; and Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5 NM.
What You Should Do
Move to safe harbor immediately as gusty winds and high waves are expected. If caught on the open water, stay below deck if possible and keep away from ungrounded metal objects.
Expected Conditions
Strong thunderstorms with wind gusts of 34 knots or greater and small hail are anticipated.
Timeline
The alert is effective from 4:17 PM CDT on April 17, 2026, and expires at 5:15 PM CDT on the same day.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
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 (1,071 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to April 25, 2026.
Frequently Asked Questions
Common questions about this NWS weather alert.