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Western Lake Superior

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EST 08 November 2025

Today Tonight and Sunday.

Strong wind warning in effect.

Wind northwest 10 knots increasing to northwest 15 this afternoon then veering to north 15 this evening. Wind diminishing to north 10 early Sunday morning then increasing to north 20 Sunday evening.

Scattered flurries.

Waves

Issued 10:30 AM EST 08 November 2025
Today Tonight and Sunday. Waves 0.5 metres or less building to 0.5 to 1 early this evening then subsiding to 0.5 or less Sunday morning. Waves building to 1 to 1.5 Sunday evening.

Extended Forecast

Issued 03:00 AM EST 08 November 2025
Monday Wind north 25 knots diminishing to north 15 late in the day.
Tuesday Wind southwest 20 knots veering to northwest 20 late in the day.
Wednesday Wind northwest 20 knots increasing to northwest 30.

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Map of Great Lakes - Lake Superior marine weather areas Pukaskwa National Park Marathon Airport Caribou Island Armstrong Airport Royal Island Kenora Airport Thunder Bay Airport Welcome Island Lake Of the Woods - 45148 Little Flatland Island Sault Ste. Marie Airport Wawa Airport Slate Island - 45136
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Ice Conditions

*Ice Forecast and Warnings also apply to U.S. waters

Ice Forecasts

Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Western Lake Superior

Issued 10:30 AM EST 08 November 2025

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EST 8 November 2025 Today Tonight and Sunday At 10:30 a.m. EST today ridge located on a line northwest-southeast
over northwestern Ontario.
By 10:30 a.m. EST Sunday ridge located on a line east-west over
northeastern Ontario.

At 10:30 a.m. EST today low 1010 mb located over southwestern Iowa.
By 10:30 a.m. EST Sunday low 1005 mb located over western
Pennsylvania.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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