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Southern Lake Huron

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 20 April 2026

Today Tonight and Tuesday.

Wind north 15 knots diminishing to northwest 10 this morning then becoming light this afternoon. Wind increasing to south 20 this evening and to south 25 overnight. Wind diminishing to south 15 Tuesday afternoon and to southeast 10 Tuesday evening.

Scattered flurries ending this morning.

Waves

Issued 03:00 AM EDT 20 April 2026
Today Tonight and Tuesday. Waves 1 to 1.5 metres subsiding to 0.5 to 1 early this morning then building to 2 overnight. Waves subsiding to 1 to 1.5 near noon Tuesday and to 0.5 or less Tuesday evening.

Extended Forecast

Issued 03:00 AM EDT 20 April 2026
Wednesday Wind light.
Thursday Wind light becoming southeast 15 knots.
Friday Wind southeast 20 knots.

Ice Forecast*

Issued 12:00 PM EDT 19 April 2026 Today Tonight and Monday Ice free.

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

    

[ Canadian Ice Service ]

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas CFB Trenton Port Colborne - 45142 Hamilton Munro Int'l Airport Oshawa Executive Airport Port Stanley - 45132 Lake Nipissing - 45152 Point Petre Georgian Bay - 45137 Toronto City Centre Airport Lake Simcoe - 45151 South Georgian Bay - 45143 Prince Edward Point - 45135 Peterborough Municipal Airport South Lake Huron - 45149 Collingwood Lake St Clair - 45147 Grimsby - 45139 Goderich Lagoon City Kingston Airport Muskoka Airport Parry Sound Harbour Grenadier Island Lake Simcoe Regional Airport Wiarton Airport Brockville Western Islands Cove Island Great Duck Island North Channel - 45154 Sarnia Chris Hadfield Airport Gore Bay-Manitoulin Airport Tobermory Harrow AAFC Long Point North Bay Airport Port Weller St. Catharines / Niagara District Airport Greater Sudbury Airport Southeast Shoal Vineland Station Port Colborne Erieau Cobourg Sault Ste. Marie Airport Windsor Airport Welland-Pelham Killarney Ajax - 45159 Point Pelee Burlington Lift Bridge
Legend:
buoy Buoy
land station Land Station
Ice Conditions

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

Ice Forecasts

Southern Lake Huron

Issued 12:00 PM EDT 19 April 2026 Today Tonight and Monday

Ice Coverage

Ice free.

Ice Forecasts

Northern Lake Michigan

Issued 12:00 PM EDT 19 April 2026 Today Tonight and Monday

Ice Coverage

Open water except 2 tenths thick lake ice in Little Traverse Bay.

Ice Forecasts

Southern Lake Michigan

Issued 12:00 PM EDT 19 April 2026 Today Tonight and Monday

Ice Coverage

Ice free.

Ice Forecasts

Green Bay

Issued 12:00 PM EDT 19 April 2026 Today Tonight and Monday

Ice Coverage

Open water. Consolidated rotten thick lake ice in Bays de Noc.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 20 April 2026 Today Tonight and Tuesday At 3:00 a.m. EDT today high 1028 mb located over Wisconsin.
By 3:00 a.m. EDT Tuesday high 1030 mb located southeast of Lake
Ontario.

At 3:00 a.m. EDT today low 989 mb located over northern
Saskatchewan.
By 3:00 a.m. EDT Tuesday low 996 mb located over Hudson Bay.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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