Marquette, MI – Boaters and mariners on Lake Superior are being warned of hazardous conditions as a Dense Fog Advisory has been issued for parts of the lake through Friday morning. Reduced visibility is expected to make navigation especially challenging in key offshore areas east of Manitou Island and west of Grand Marais, as well as from Grand Marais to Whitefish Point.
According to the National Weather Service in Marquette, the advisory was issued Thursday afternoon and remains in effect until 11 a.m. EDT on Friday. The impacted zones include regions east of a line from Manitou Island to Marquette and west of Grand Marais to the US/Canadian border, beyond five nautical miles from shore. Mariners traveling between Grand Marais and Whitefish Point, also beyond five nautical miles offshore to the Canadian border, are included in the warning.
Visibility is forecast to drop below one nautical mile due to dense fog, which could significantly hamper safe navigation. The weather service cautions that low visibility on the water can be dangerous, increasing the risk of accidents for vessels operating in these sections of Lake Superior.
Officials urge mariners to proceed with caution during the advisory. Navigators are advised to use proper fog signals, ensure all running lights are activated, and rely on radar and compass equipment to aid safe passage. The National Weather Service also recommends delaying travel if possible or remaining alert to sudden changes in weather and visibility.
The advisory is part of a continued effort to ensure public safety on Lake Superior, particularly during peak boating season when water traffic is typically higher.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
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