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Southern Lake Huron

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 29 April 2025

Today Tonight and Wednesday.

Wind southwest 20 knots veering to west 25 this afternoon then to northwest 30 early this evening. Wind diminishing to north 15 late overnight and to north 10 early Wednesday morning. Wind veering to east 10 Wednesday evening.

Scattered showers and fog patches ending this evening with a risk of thunderstorms.

Waves

Issued 10:30 AM EDT 29 April 2025
Today Tonight and Wednesday. Waves 2 to 3 metres subsiding to 1 early Wednesday morning and to 0.5 or less near noon Wednesday.

Extended Forecast

Issued 03:00 AM EDT 29 April 2025
Thursday Wind light increasing to east 20 knots late in the day.
Friday Wind southwest 20 knots veering to northwest 15.
Saturday Wind northwest 15 knots.

Ice Forecast*

Issued 12:00 PM EDT 29 April 2025 Today Tonight and Wednesday 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 Harrow AAFC Burlington Lift Bridge Oshawa Executive Airport Point Pelee Peterborough Municipal Airport Point Petre Hamilton Munro Int'l Airport Erieau Cobourg Toronto City Centre Airport Port Colborne CFB Trenton South Lake Huron - 45149 Windsor Airport Great Duck Island Gore Bay-Manitoulin Airport North Bay Airport Greater Sudbury Airport Killarney Sault Ste. Marie Airport Ajax - 45159 North Channel - 45154 Lake Nipissing - 45152 Lake Simcoe - 45151 Welland-Pelham Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Vineland Station Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Cove Island Goderich Sarnia Chris Hadfield Airport Western Islands Tobermory Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal
Legend:
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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 29 April 2025 Today Tonight and Wednesday

Ice Coverage

Ice free.

Ice Forecasts

Lake Michigan

Issued 12:00 PM EDT 29 April 2025 Today Tonight and Wednesday

Ice Coverage

Ice free.

Warnings

Watches (In effect)

Squall watch in effect

Southern Lake Huron

Issued 3:22 PM EDT 29 April 2025 A line of strong to severe thunderstorms is expected push over Lake Huron and Georgian Bay this afternoon along and ahead of an advancing cold front. These storms may produce wind gusts up to 50 knots, large hail and frequent lightning.

Large hail can damage vessels and cause injury. Vessels without lightning protection should make their way to shore immediately. Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway.

Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 29 April 2025 Today Tonight and Wednesday At 10:30 a.m. EDT today low 997 mb located over northeastern
Ontario.
By 10:30 a.m. EDT Wednesday low 990 mb located over eastern Quebec.

At 10:30 a.m. EDT today ridge located on a line northeast-southwest
over the Ontario - Manitoba border.
By 10:30 a.m. EDT Wednesday ridge located on a line
northeast-southwest over Whitefish Bay.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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