Storm Warning Issued for Lake Superior and Western Upper Michigan Coastal Waters
This alert is no longer in effect.
NOAA issued it on March 31, 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.
The National Weather Service has issued a Storm Warning for Lake Superior and surrounding coastal areas, with waves up to 22 feet and wind gusts reaching 55 knots expected through Monday.
Read this weather record in 30 seconds
- Record type
- Storm Warning
- Affected area
- Lake Superior and Western Upper Michigan
- Issued
- March 31, 2026
- Issuing authority
- NWS Marquette
Storm notices can cover different combinations of wind, hail, lightning, and rainfall. Use the original notice for the hazards and boundaries attached to this specific record.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Lake Superior and Western Upper Michigan.
Alert Details
The National Weather Service in Marquette, MI, has issued a Storm Warning (SRW) for portions of Lake Superior and adjacent coastal waters. This alert follows an initial Gale Warning and indicates a significant escalation in hazardous maritime conditions.
Affected Areas
The warning covers the following geographic regions:
- Saxon Harbor, WI to Black River, MI
- Black River to Ontonagon, MI
- Ontonagon to the Upper Entrance of the Portage Canal, MI
- Lake Superior from Saxon Harbor, WI to the Upper Entrance of the Portage Canal, MI (5NM offshore to the US/Canadian border)
- Isle Royale National Park
Expected Conditions
Weather conditions are expected to deteriorate in two phases:
Gale Warning Phase:
- Winds: Northeast winds 30 to 40 knots with gusts up to 45 knots.
- Waves: 13 to 18 feet.
Storm Warning Phase:
- Winds: North winds 35 to 45 knots with gusts up to 55 knots.
- Waves: 17 to 22 feet.
- Visibility: Reduced visibility is expected due to severe conditions.
Timeline
- Gale Warning: Effective from 8:00 AM EDT (7:00 AM CDT) to 8:00 PM EDT (7:00 PM CDT) on Sunday, March 15.
- Storm Warning: Effective from 8:00 PM EDT (7:00 PM CDT) Sunday, March 15, until 2:00 PM EDT (1:00 PM CDT) Monday, March 16.
What You Should Do
Mariners are urged to take immediate safety precautions. The National Weather Service advises that mariners should remain in port, alter course to avoid the storm, and/or secure their vessels for severe conditions. Storm force winds and hazardous waves are capable of capsizing or damaging vessels.
Original source: NOAA Official Notice ↗
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