Western Lake Ontario


Marine Forecast

Issued 10:30 AM EDT 23 August 2017

Today Tonight and Thursday.

Strong wind warning in effect.

Wind west 20 knots veering to northwest 20 this afternoon then diminishing to northwest 15 near midnight. Wind diminishing to northwest 10 early Thursday morning then backing to west 10 near noon Thursday.

Chance of showers today. Chance of showers Thursday morning and afternoon. Risk of waterspouts today and Thursday.


Issued 10:30 AM EDT 23 August 2017
Today Tonight and Thursday. Waves one metre subsiding to one half metre or less late overnight.

Extended Forecast

Issued 03:00 AM EDT 23 August 2017
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 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 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 Goderich Sarnia Chris Hadfield Airport Tobermory Harrow AAFC Port Weller St. Catharines Airport Southeast Shoal Vineland Station Welland-Pelham Windsor Airport Burlington Lift Bridge Cobourg Hamilton Munro Int'l Airport Oshawa Municipal Airport Point Petre Toronto City Centre Airport CFB Trenton Peterborough Municipal Airport Killarney Western Islands Cove Island Long Point Port Colborne Erieau Point Pelee
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 27 April 2017 Forecasts have ended for the season.

Warnings (In effect)

Strong wind warning in effect

Western Lake Ontario

Issued 10:30 AM EDT 23 August 2017

'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.


Technical Marine Synopsis

Issued 10:30 AM EDT 23 August 2017 Today Tonight and Thursday At 10:30 a.m. EDT today quasi-stationary low 992 mb located over
central Quebec.

At 10:30 a.m. EDT Thursday high 1021 mb located over the Ontario -
Manitoba border.
By 10:30 a.m. EDT Thursday high 1024 mb located over northwestern

Great Lakes - Lake Erie and Lake Ontario Area

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