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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 26 July 2021

Tonight and Tuesday.

Wind southwest 15 to 20 knots with gusts to 50 near thunderstorms. Wind diminishing to light this evening. Wind light Tuesday.

Showers ending near midnight with a risk of thunderstorms. Showers Tuesday afternoon.

Extended Forecast

Issued 06:00 AM EDT 26 July 2021
Wednesday Wind light.
Thursday Wind light becoming southwest 10 to 15 knots.
Friday Wind northwest 15 knots.

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Map of Great Lakes - Lake Huron marine weather areas N Huron - 45003 W Erie - 45005 S Huron - 45008 Lake Ontario - 45012 Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Great Duck Island Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Cove Island Goderich Sarnia Chris Hadfield Airport Tobermory Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal Vineland Station Welland-Pelham Windsor Airport Port Colborne Erieau Point Pelee Burlington Lift Bridge Cobourg Hamilton Munro Int'l Airport Oshawa Executive Airport Point Petre Toronto City Centre Airport CFB Trenton Peterborough Municipal Airport
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Warnings

Watches (In effect)

Squall watch in effect

Cornwall to Montréal

Issued 4:48 PM EDT 26 July 2021 Conditions are favourable for the development of squalls with wind gusts up to 50 knots this afternoon and early this evening.

Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway. Consider delaying or postponing travel in areas under the Squall Watch.

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 3:00 PM EDT 26 July 2021 Tonight and Tuesday At 3:00 p.m. EDT today trough located on a line northeast-southwest
over Lake Saint-Jean.
By 11:00 p.m. EDT Tuesday trough located on a line north-south
over Sept-Îles.

At 3:00 p.m. EDT today building ridge located west of the Great
Lakes.
By 8:00 p.m. EDT Tuesday ridge located from Lake Superior to James
Bay then to Ungava Bay.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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