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Western Lake Superior

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 21 May 2025

Tonight and Thursday.

Wind north 10 knots increasing to northeast 15 this evening then backing to north 15 early Thursday morning.

Waves

Issued 06:30 PM EDT 21 May 2025
Tonight and Thursday. Waves 1 metre.

Extended Forecast

Issued 06:30 PM EDT 21 May 2025
Friday Wind northwest 15 knots diminishing to light late in the day.
Saturday Wind light becoming northwest 15 knots.
Sunday Wind light.

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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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 21 May 2025 Tonight and Thursday At 6:30 p.m. EDT tonight low 1002 mb located over western Lake Erie.
By 6:30 p.m. EDT Thursday low 1005 mb located over eastern Lake
Erie.

At 6:30 p.m. EDT tonight quasi-stationary ridge located on a line
north-south over northwestern Ontario.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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