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Southern Lake Huron

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 16 June 2026

Today Tonight and Wednesday.

Wind south 15 to 20 knots diminishing to south 10 this evening then increasing to south 15 Wednesday evening.

Scattered showers this afternoon tonight and Wednesday morning with a risk of thunderstorms. Rain Wednesday evening. Fog patches forming near midnight and dissipating near noon Wednesday.

Waves

Issued 10:30 AM EDT 16 June 2026
Today Tonight and Wednesday. Waves 0.5 to 1 metre subsiding to 0.5 or less near midnight.

Extended Forecast

Issued 03:00 AM EDT 16 June 2026
Thursday Wind southeast 25 knots veering to southwest 25 in the morning then to northwest 20 in the afternoon.
Friday Wind northwest 20 knots.
Saturday Wind northwest 15 knots diminishing to light late in the day.

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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
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land station Land Station
Ice Conditions

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

Ice Forecasts

Lake Huron

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.

Ice Forecasts

Lake Michigan

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings

Watches (In effect)

Squall watch in effect

Southern Lake Huron

Issued 5:35 PM EDT 16 June 2026 Conditions are favourable for the development of squalls with wind gusts up to 35 knots, hail and poor to very poor visibility in thunderstorms heavy at times.

Thunderstorms moving west to east may track across portions of Lake Huron, Lake St. Clair and Lake Simcoe this evening.

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 16 June 2026 Today Tonight and Wednesday At 10:30 a.m. EDT today departing ridge located on a line
northeast-southwest over Pennsylvania.

At 10:30 a.m. EDT today trough from 999 mb low located from James
Bay to Wisconsin.
By 10:30 a.m. EDT Wednesday dissipating trough located on a line
north-south over southern Ontario.

At 10:30 a.m. EDT today ridge located on a line north-south over
South Dakota.
By 10:30 a.m. EDT Wednesday ridge located on a line
northwest-southeast over Lower Michigan.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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