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Northern Lake Huron

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 01 July 2026

Today Tonight and Thursday.

Wind variable 10 knots increasing to southwest 15 this evening then veering to west 15 late overnight. Wind diminishing to variable 10 Thursday morning.

Scattered showers and fog patches with a risk of thunderstorms.

Waves

Issued 10:30 AM EDT 01 July 2026
Today Tonight and Thursday. Waves 0.5 to 1 metre.

Extended Forecast

Issued 03:00 AM EDT 01 July 2026
Friday Wind light.
Saturday Wind light.
Sunday Wind light.

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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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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

Northern Lake Huron

Issued 4:57 PM EDT 01 July 2026 Conditions are favourable for the development of squalls with wind gusts up to 40 knots and frequent lightning.

Thunderstorms may develop again this evening and possibly into the overnight hours.

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 1 July 2026 Today Tonight and Thursday At 10:30 a.m. EDT today quasi-stationary ridge located on a line
northeast-southwest over the Eastern Seaboard.

At 10:30 a.m. EDT today low 992 mb located over central Manitoba.
By 10:30 a.m. EDT Thursday trough located on a line east-west over
northern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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