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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 29 April 2025

Tonight and Wednesday.

Gale warning in effect.

Wind southwest 25 to 35 knots becoming west 20 to 30 near midnight then diminishing to northwest 15 early Wednesday morning. Wind diminishing to light Wednesday evening.

Scattered showers ending near midnight with a risk of thunderstorms. Visibility as low as 1 mile in showers.

Extended Forecast

Issued 06:00 AM EDT 29 April 2025
Thursday Wind light.
Friday Wind easterly 10 to 20 knots becoming southwest 15 to 25 late in the day.
Saturday Wind southwest 15 knots diminishing to light.

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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
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land station Land Station
Ice Conditions

There is no ice forecast issued for this area.

Warnings

Warnings (In effect)

Gale warning in effect

Cornwall to Montréal

Issued 3:00 PM EDT 29 April 2025

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 PM EDT 29 April 2025 Tonight and Wednesday At 3:00 p.m. EDT today departing ridge located from Cape Hatteras
to Newfoundland.

At 3:00 p.m. EDT today low 996 mb located over Lake Superior.
By 8:00 p.m. EDT Wednesday low 993 mb located near the Quebec
Lower North Shore.

At 8:00 p.m. EDT tonight high 1021 mb located over Lake Superior.
By 8:00 p.m. EDT Wednesday high 1023 mb located over western Quebec.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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