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Eastern Lake Superior

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 10 May 2025

Today Tonight and Sunday.

Strong wind warning in effect.

Wind north 20 knots diminishing to north 15 near noon and to northwest 10 early this evening. Wind becoming light near midnight then increasing to southeast 15 overnight. Wind increasing to south 20 Sunday morning and to south 25 Sunday afternoon. Wind veering to southwest 20 Sunday evening.

Waves

Issued 03:00 AM EDT 10 May 2025
Today Tonight and Sunday. Waves 1 to 1.5 metres subsiding to 0.5 to 1 this afternoon and to 0.5 or less this evening. Waves building to 0.5 to 1 Sunday morning and to 1 to 1.5 near noon Sunday.

Extended Forecast

Issued 03:00 AM EDT 10 May 2025
Monday Wind south 15 knots.
Tuesday Wind south 15 knots.
Wednesday Wind southeast 15 knots diminishing to light.

Ice Forecast*

Issued 12:00 PM EDT 9 May 2025 Today Tonight and Saturday 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 9 May 2025 Today Tonight and Saturday

Ice Coverage

Ice free.

Warnings

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Superior

Issued 03:00 AM EDT 10 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 3:00 AM EDT 10 May 2025 Today Tonight and Sunday At 3:00 a.m. EDT today trough from 1008 mb low located on a line
north-south over the St. Lawrence River.
By 3:00 a.m. EDT Sunday departing trough from 992 mb low located
on a line north-south over Nova Scotia.

At 3:00 a.m. EDT today dissipating cold front located on a line
northeast-southwest over northern Ontario.

At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over Lake of the Woods.
By 3:00 a.m. EDT Sunday ridge located on a line northeast-southwest
over northern Lake Huron.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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