Heavy Freezing Spray Warning Issued for Western Lake Superior Through Monday Morning
This alert is no longer in effect.
NOAA issued it on April 6, 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 Heavy Freezing Spray Warning for western Lake Superior, warning of rapid ice accumulation on vessels through Monday morning.
Read this weather record in 30 seconds
- Record type
- Heavy Freezing Spray Warning
- Affected area
- Western Lake Superior
- Issued
- April 6, 2026
- Issuing authority
- NWS Marquette
The warning type, named area, and issue time define this record. Confirm all three against the original agency notice before treating it as current.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Western Lake Superior.
Alert Details
The National Weather Service in Marquette, MI, has issued a Heavy Freezing Spray Warning for portions of Lake Superior. This alert indicates that conditions are favorable for significant ice accumulation on vessels, which poses a severe risk to maritime safety.
Affected Areas
The warning specifically covers Lake Superior west of a line from Saxon Harbor, WI, to Grand Portage, MN, beyond 5 nautical miles (5NM) from the shore.
What You Should Do
Mariners are strongly advised to take the following precautions:
- Prepare for dangerous and rapid accumulation of ice on vessels.
- If possible, remain in port until conditions improve.
- Avoid the warning area entirely.
- If caught in these conditions, conduct immediate ice mitigation efforts to maintain vessel integrity.
Expected Conditions
According to the NWS, heavy freezing spray is occurring at a rate of 2 cm per hour or greater. This level of spray can lead to rapid ice accretion on decks and superstructures. Such accumulation is extremely hazardous as it may render mechanical and electronic components inoperative and can result in a catastrophic loss of stability for the vessel.
Timeline
The warning is effective immediately and will remain in place until 7:00 AM EST (6:00 AM CST) on Monday, February 23, 2026.
Original source: NOAA Official Notice ↗
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