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47.47 °N, 87.89 °W

Copper Harbor, MI Severe Weather Alertstar_ratehome

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Current Station
Personal Weather Station
Location: Copper Harbor, MI
Nearby Weather Stations

Active Weather Alerts

Heavy Freezing Spray Warning
Issued: 3:58 PM Dec. 3, 2025 – National Weather Service
...GALE WARNING REMAINS IN EFFECT UNTIL 7 AM EST THURSDAY...
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT FROM 7 PM THIS
EVENING TO 7 AM EST THURSDAY...

* WHAT...For the Gale Warning, northwest winds 25 to 30 kt with
gusts up to 40 kt and waves 8 to 13 ft occurring. For the
Heavy Freezing Spray Warning, heavy freezing spray at a rate
of 2 cm per hour or greater expected, and may rapidly
accumulate on vessels.

* WHERE...Eagle River to Manitou Island MI, Lake Superior from
Upper Entrance to Portage Canal to Manitou Island MI 5NM off
shore to the US/Canadian Border and Lake Superior East of a
line from Manitou Island to Marquette MI and West of a line
from Grand Marais MI to the US/Canadian Border Beyond 5NM from
shore.

* WHEN...For the Gale Warning, until 7 AM EST Thursday. For the
Heavy Freezing Spray Warning, from 7 PM this evening to 7 AM
EST Thursday.

* IMPACTS...Operating a vessel in heavy freezing spray is
hazardous. Freezing spray may render mechanical and electronic
components inoperative. Rapid ice accretion on decks and
superstructures may result in a catastrophic loss of
stability. Strong winds will cause hazardous waves which could
capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should prepare for dangerous accumulation of ice on
their vessel. If possible, remain in port, avoid the warning area
or conduct mitigation.

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.

&&

Gale Warning
Issued: 3:58 PM Dec. 3, 2025 – National Weather Service
...GALE WARNING REMAINS IN EFFECT UNTIL 7 AM EST THURSDAY...
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT FROM 7 PM THIS
EVENING TO 7 AM EST THURSDAY...

* WHAT...For the Gale Warning, northwest winds 25 to 30 kt with
gusts up to 40 kt and waves 8 to 13 ft occurring. For the
Heavy Freezing Spray Warning, heavy freezing spray at a rate
of 2 cm per hour or greater expected, and may rapidly
accumulate on vessels.

* WHERE...Eagle River to Manitou Island MI, Lake Superior from
Upper Entrance to Portage Canal to Manitou Island MI 5NM off
shore to the US/Canadian Border and Lake Superior East of a
line from Manitou Island to Marquette MI and West of a line
from Grand Marais MI to the US/Canadian Border Beyond 5NM from
shore.

* WHEN...For the Gale Warning, until 7 AM EST Thursday. For the
Heavy Freezing Spray Warning, from 7 PM this evening to 7 AM
EST Thursday.

* IMPACTS...Operating a vessel in heavy freezing spray is
hazardous. Freezing spray may render mechanical and electronic
components inoperative. Rapid ice accretion on decks and
superstructures may result in a catastrophic loss of
stability. Strong winds will cause hazardous waves which could
capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should prepare for dangerous accumulation of ice on
their vessel. If possible, remain in port, avoid the warning area
or conduct mitigation.

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.

&&

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