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Cornwall to Montréal


Marine Forecast

Issued 03:33 PM EDT 20 July 2019

Tonight and Sunday.

Strong wind warning in effect. Squall watch in effect.

Wind southwest 20 to 30 knots with gusts to 40 near thunderstorms. Wind diminishing to southwest 10 to 15 this evening then becoming light after midnight. Wind increasing to southwest 10 to 20 near noon Sunday then diminishing to light Sunday evening.

Showers or a few thunderstorms ending Sunday evening. Risk of thunderstorms Sunday morning. Visibility as low as 1 mile in precipitation.

Extended Forecast

Issued 06:00 AM EDT 20 July 2019
Monday Wind light becoming southwest 15 knots in the afternoon.
Tuesday Wind west 10 to 15 knots.
Wednesday Wind light.

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Weather Conditions

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Map of Great Lakes - Lake Erie and Lake Ontario 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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Ice Conditions

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Warnings (In effect)

Strong wind warning in effect

Cornwall to Montréal

Issued 3:33 PM EDT 20 July 2019

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.

Watches (In effect)

Squall watch in effect

Cornwall to Montréal

Issued 3:35 PM EDT 20 July 2019 Conditions are favourable for the development of squalls with wind gusts up to 40 knots and poor to very poor visibility in thunderstorms heavy at times.

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


Technical Marine Synopsis

Issued 3:00 PM EDT 20 July 2019 Tonight and Sunday At 3:00 p.m. EDT today trough located over James Bay.
By 8:00 p.m. EDT Sunday trough located from Nova Scotia to Cape
Breton Island.

At 3:00 p.m. EDT today ridge located on a line east-west over
northern Manitoba.
By 8:00 p.m. EDT Sunday ridge located from the Great Lakes to

Great Lakes - Lake Erie and Lake Ontario Area

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