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Western Lake Superior

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 01 April 2025

Today Tonight and Wednesday.

Gale warning in effect.

Wind northeast 10 knots increasing to southeast 15 this afternoon and to southeast 20 this evening. Wind increasing to southeast 30 Wednesday morning and to southeast 35 near noon Wednesday. Wind diminishing to east 30 Wednesday evening.

Flurries Wednesday morning changing to snow. Visibility 1 mile or less in snow.

Waves

Issued 10:30 AM EDT 01 April 2025
Today Tonight and Wednesday. Waves 0.5 metres building to 0.5 to 1 early this evening and to 1.5 near midnight. Waves building to 2 to 3 early Wednesday morning and to 3 to 4 Wednesday afternoon.

Extended Forecast

Issued 03:00 AM EDT 01 April 2025
Thursday Wind northeast 20 knots backing to northwest 20 in the morning.
Friday Wind north 15 knots diminishing to light.
Saturday Wind north 15 knots backing to west 15.

Ice Forecast*

Issued 12:00 PM EDT 1 April 2025 Today Tonight and Wednesday Open water except 5 tenths new lake ice including 1 tenth thick lake ice near parts of the shores. Consolidated thick lake ice in Black Bay, Nipigon Bay, Chequamegon Bay and 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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land station Land Station
Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 1 April 2025 Today Tonight and Wednesday

Ice Coverage

Open water except 5 tenths new lake ice including 1 tenth thick lake
ice near parts of the shores. Consolidated thick lake ice in Black
Bay, Nipigon Bay, Chequamegon Bay and eastern Thunder Bay.

Warnings

Warnings (In effect)

Gale warning in effect

Western Lake Superior

Issued 10:30 AM EDT 01 April 2025

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. 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 10:30 AM EDT 1 April 2025 Today Tonight and Wednesday At 10:30 a.m. EDT today ridge located on a line north-south over
Whitefish Bay.
By 10:30 a.m. EDT Wednesday ridge located on a line north-south
over central Quebec.

At 10:30 a.m. EDT today low 993 mb located over Colorado.
By 10:30 a.m. EDT Wednesday low 984 mb located over northwestern
Nebraska.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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