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Eastern Lake Superior

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 12 May 2025

Tonight and Tuesday.

Strong wind warning in effect.

Wind southeast 15 knots increasing to southeast 20 this evening then diminishing to southeast 15 early Tuesday morning. Wind increasing to southeast 20 Tuesday evening.

Waves

Issued 06:30 PM EDT 12 May 2025
Tonight and Tuesday. Waves 1 metre building to 1.5 this evening then subsiding to 0.5 to 1 Tuesday morning. Waves building to 1.5 Tuesday evening.

Extended Forecast

Issued 06:30 PM EDT 12 May 2025
Wednesday Wind southeast 20 knots.
Thursday Wind southeast 15 knots increasing to southeast 20 late in the day.
Friday Wind southeast 20 knots.

Ice Forecast*

Issued 12:00 PM EDT 12 May 2025 Today Tonight and Tuesday Ice free.

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

 

[ Canadian Ice Service ]

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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 12 May 2025 Today Tonight and Tuesday

Ice Coverage

Ice free.

Warnings

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Superior

Issued 6:30 PM EDT 12 May 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 6:30 PM EDT 12 May 2025 Tonight and Tuesday At 6:30 p.m. EDT tonight ridge located on a line north-south over
eastern Ontario.
By 6:30 p.m. EDT Tuesday departing ridge located off the Eastern
Seaboard.

At 6:30 p.m. EDT tonight low 996 mb located over southern Alberta.
By 6:30 p.m. EDT Tuesday low 995 mb located over northwestern
Ontario.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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