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Western Lake Superior

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 10 April 2026

Today Tonight and Saturday.

Wind northwest 10 knots backing to west 10 near noon then increasing to southwest 15 this afternoon. Wind diminishing to west 10 late overnight then becoming light Saturday morning. Wind becoming southeast 15 Saturday evening.

Waves

Issued 10:30 AM EDT 10 April 2026
Today Tonight and Saturday. Over open water waves 0.5 metres or less building to 0.5 to 1 early this evening then subsiding to 0.5 or less early Saturday morning. Waves building to 0.5 to 1 Saturday evening.

Extended Forecast

Issued 03:00 AM EDT 10 April 2026
Sunday Wind southeast 15 knots increasing to southeast 25 in the morning then veering to southwest 25 late in the day.
Monday Wind southwest 25 knots diminishing to light late in the day.
Tuesday Wind northeast 15 knots.

Ice Forecast*

Issued 12:00 PM EDT 10 April 2026 Today Tonight and Saturday Open water except 3 tenths thick lake ice along parts of the southwestern shore and north of Isle Royale. Consolidated thick lake ice along parts of the southern shore. Consolidated very thick lake ice in Black Bay, Nipigon Bay and Thunder Bay.

*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 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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land station Land Station
Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 10 April 2026 Today Tonight and Saturday

Ice Coverage

Open water except 3 tenths thick lake ice along parts of the
southwestern shore and north of Isle Royale. Consolidated thick lake
ice along parts of the southern shore. Consolidated very thick lake
ice in Black Bay, Nipigon Bay and Thunder Bay.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 10 April 2026 Today Tonight and Saturday At 10:30 a.m. EDT today trough located on a line northeast-southwest
over Lake Erie.
By 10:30 a.m. EDT Saturday low 1010 mb located over the Gulf of
St. Lawrence.

At 10:30 a.m. EDT today ridge located on a line northwest-southeast
over South Dakota.
By 10:30 a.m. EDT Saturday ridge located on a line north-south
over Lake Huron.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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