Heavy Freezing Spray and Storm Warning Issued for Grand Portage to Grand Marais, MN
The National Weather Service has issued a Heavy Freezing Spray Warning and Storm Warning for the Lake Superior coast from Grand Portage to Grand Marais, effective until 4 PM CDT Monday.
Alert Details
The National Weather Service in Duluth, MN, has issued a Heavy Freezing Spray Warning and a Storm Warning for the coastal waters of Lake Superior. These warnings are in effect through the afternoon of March 16.
Affected Areas
The primary area affected by this alert is the region spanning from Grand Portage to Grand Marais, Minnesota (LSZ140).
What You Should Do
Mariners are strongly advised to remain in port or avoid the warning area entirely. If currently at sea, vessel operators should alter course and secure their vessels for severe conditions. It is critical to prepare for the dangerous accumulation of ice. Freezing spray can render mechanical and electronic components inoperative and lead to a catastrophic loss of vessel stability.
Expected Conditions
- Wind: North winds between 20 to 30 knots, with gusts reaching up to 50 knots.
- Waves: Wave heights are expected to range from 3 to 6 feet.
- Ice Accumulation: Heavy freezing spray is forecast to accumulate at a rate of 2 cm per hour or greater.
- Hazards: Storm-force winds and hazardous waves may capsize or damage vessels while significantly reducing visibility.
Timeline
The alert is currently active and remains in effect until 4:00 PM CDT this afternoon, March 16, 2026.
Source: NOAA Official Notice
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