Western Lake Ontario


Marine Forecast

Issued 06:30 PM EDT 28 June 2017

Tonight and Thursday.

Strong wind warning in effect.

Wind southwest 15 knots diminishing to south 10 this evening then backing to southeast 10 late overnight. Wind increasing to south 15 Thursday morning and to southwest 25 Thursday afternoon.

Chance of showers beginning late overnight changing to a few showers early Thursday morning. Risk of thunderstorms overnight and Thursday.


Issued 06:30 PM EDT 28 June 2017
Tonight and Thursday. Waves one half to one metre building to 2 Thursday evening.

Extended Forecast

Issued 06:30 PM EDT 28 June 2017
Friday Wind southwest 20 knots diminishing to light late in the day.
Saturday Wind southwest 15 knots.
Sunday Wind southwest 15 knots.

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Weather Conditions

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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 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 7:57 PM EDT 28 June 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 6:30 PM EDT 28 June 2017 Tonight and Thursday At 6:30 p.m. EDT tonight ridge located on a line north-south over
southern Ontario.
By 6:30 p.m. EDT Thursday ridge located on a line
northeast-southwest over the Eastern Seaboard.

At 6:30 p.m. EDT tonight low 999 mb located over central Minnesota.
By 6:30 p.m. EDT Thursday low 1003 mb located over Whitefish Bay.

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