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Western Lake Superior

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 17 June 2026

Tonight and Thursday.

Wind east 10 knots becoming light this evening then becoming northwest 10 near midnight. Wind increasing to northwest 15 early Thursday morning then backing to west 15 Thursday afternoon.

Scattered showers Thursday afternoon and evening with a risk of thunderstorms. Fog patches dissipating Thursday morning. Fog patches reforming Thursday evening.

Waves

Issued 06:30 PM EDT 17 June 2026
Tonight and Thursday. Waves 0.5 metres or less building to 1 Thursday morning.

Extended Forecast

Issued 06:30 PM EDT 17 June 2026
Friday Wind northwest 15 knots backing to southwest 15 in the afternoon.
Saturday Wind light.
Sunday Wind light.

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

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

Ice Forecasts

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 17 June 2026 Tonight and Thursday At 6:30 p.m. EDT tonight low 990 mb located over southern Minnesota.
By 6:30 p.m. EDT Thursday low 991 mb located over southern Quebec.

By 6:30 p.m. EDT Thursday trough located on a line north-south
over western Lake Superior.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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