Storm Warning Issued for Lake Superior: Dangerous Winds and Waves Expected Through Tuesday

Alert Details

The National Weather Service in Marquette, MI, has issued a Storm Warning for portions of Central, Eastern, and Western Lake Superior. This alert follows a Gale Warning and indicates a significant threat to maritime safety due to extreme wind and wave conditions.

Affected Areas

The warning covers a broad area of Lake Superior, including:

• Upper Entrance of Portage Canal to Eagle River, MI
• Eagle River to Manitou Island, MI
• Manitou Island to Point Isabelle, MI
• Point Isabelle to Lower Entrance of Portage Canal, MI
• Portage Lake to Huron Island, MI
• Keweenaw and Huron Bays
• Huron Islands to Marquette, MI
• Marquette to Munising, MI
• Munising to Grand Marais, MI
• Open waters from the Upper Entrance to Portage Canal to the US/Canadian Border

What You Should Do

Mariners are advised to take immediate precautions. The National Weather Service recommends that mariners remain in port, alter course to avoid the storm, or secure their vessels for severe conditions. Storm-force winds and hazardous waves are capable of capsizing or damaging vessels and significantly reducing visibility.

Expected Conditions

Conditions are expected to deteriorate in two phases:

• Gale Warning Period: Northeast winds of 30 to 40 knots with gusts up to 50 knots. Waves are expected to reach 13 to 18 feet.
• Storm Warning Period: North winds increasing to 40 to 50 knots with gusts up to 65 knots. Wave heights are forecast to reach 24 to 29 feet.

Timeline

• Gale Warning: Effective from 11:00 AM to 8:00 PM EDT on Sunday, March 15.
• Storm Warning: Effective from 8:00 PM EDT Sunday, March 15, until 2:00 AM EDT Tuesday, March 17.