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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 31 July 2021

Today Tonight and Sunday.

Wind northwest 10 knots backing to west 10 this morning then increasing to southwest 15 this afternoon. Wind diminishing to light this evening then becoming north 15 Sunday evening.

Scattered showers overnight and Sunday with a risk of thunderstorms.

Waves

Issued 03:00 AM EDT 31 July 2021
Today Tonight and Sunday. Waves one half metre or less building to one half to one metre early this evening then subsiding to less than one half metre near midnight. Waves building to one half to one metre Sunday evening.

Extended Forecast

Issued 03:00 AM EDT 31 July 2021
Monday Wind north 20 knots diminishing to southwest 15 in the afternoon.
Tuesday Wind light becoming southwest 15 knots.
Wednesday Wind light.

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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

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

Ice Forecasts

Issued 12:00 PM EDT 9 May 2021 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 31 July 2021 Today Tonight and Sunday At 3:00 a.m. EDT today high 1021 mb located over Illinois.
By 3:00 a.m. EDT Sunday high 1018 mb located over Pennsylvania.

At 3:00 a.m. EDT today low 1012 mb located over northwestern
Ontario.
By 3:00 a.m. EDT Sunday low 1008 mb located over central Lake Huron.

By 3:00 a.m. EDT Sunday building ridge located on a line
northeast-southwest over South Dakota.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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