First published Oct 28, 2026, 10:31:15 PM UTC · Last updated Oct 28, 2026, 10:31:15 PM UTC

Thunderstorms and lightning

Special Marine Warning — NWS Duluth MN

Original source title

Special Marine Warning issued October 28 at 5:21PM CDT until October 28 at 6:15PM CDT by NWS Duluth MN

Reported by U.S. National Weather Service Alerts NWS

The National Weather Service in Duluth issued a marine warning for parts of Lake Superior through 6:15 PM CDT, citing a severe thunderstorm capable of waterspouts, 40-knot wind gusts, and large hail. The warning instructed people to move to safe harbor.

At a glance

Affected location: Lake Superior

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Why it matters

The warning describes immediate marine hazards and directs people to seek safe harbor.

Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence: 8/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 3/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 2/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 4/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Urgency: 9/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Primary official sources

U.S. National Weather Service Alerts NWS Special Marine Warning issued October 28 at 5:21PM CDT until October 28 at 6:15PM CDT by NWS Duluth MN

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