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Western Lake Superior

Forecast

Marine Forecast

Issued 03:00 AM EDT 04 April 2025

Today Tonight and Saturday.

Wind west 10 knots becoming light early this morning then becoming southeast 10 this afternoon. Wind becoming variable 10 near midnight then increasing to northwest 20 Saturday morning.

Showers or flurries beginning near midnight becoming flurries Saturday morning and ending near noon Saturday.

Waves

Issued 03:00 AM EDT 04 April 2025
Today Tonight and Saturday. Waves 0.5 metres or less building to 1 to 1.5 Saturday morning.

Extended Forecast

Issued 03:00 AM EDT 04 April 2025
Sunday Wind northwest 20 knots.
Monday Wind north 20 knots increasing to north 25 late in the day.
Tuesday Wind north 20 knots.

Ice Forecast*

Issued 12:00 PM EDT 3 April 2025 Today Tonight and Friday Open water except 1 tenth thick lake ice near parts of the northwestern shore. Consolidated thick lake ice in Black Bay, Nipigon Bay, Chequamegon Bay and extreme eastern 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 Slate Island - 45136 Lake Of the Woods - 45148 Kenora Airport Royal Island Armstrong Airport Caribou Island Marathon Airport Pukaskwa National Park Thunder Bay Airport Welcome Island Little Flatland Island Sault Ste. Marie Airport Wawa Airport
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 3 April 2025 Today Tonight and Friday

Ice Coverage

Open water except 1 tenth thick lake ice near parts of the
northwestern shore. Consolidated thick lake ice in Black Bay,
Nipigon Bay, Chequamegon Bay and extreme eastern Thunder Bay.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 4 April 2025 Today Tonight and Saturday At 3:00 a.m. EDT today departing low 1003 mb located over central
Quebec.

At 3:00 a.m. EDT today high 1025 mb located over Wisconsin.
By 3:00 a.m. EDT Saturday high 1030 mb located over southern Quebec.

By 3:00 a.m. EDT Saturday approaching low 1010 mb located over
Illinois.

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