Eastern Lake Ontario


Marine Forecast

Issued 10:30 AM EDT 03 August 2015

Today Tonight and Tuesday

Strong wind warning in effect.

Wind west 20 knots diminishing to southwest 15 this afternoon then veering to west 15 this evening. Wind diminishing to west 10 late overnight then backing to southwest 10 Tuesday afternoon.

Showers with risk of thunderstorms changing to chance of showers today. A few showers beginning Tuesday afternoon with risk of thunderstorms.


Issued 10:30 AM EDT 03 August 2015
Today Tonight and Tuesday Waves one and one half metres subsiding to one this afternoon and to one half metre or less early Tuesday morning.

Extended Forecast

Issued 03:00 AM EDT 03 August 2015
Wednesday Wind light becoming west 15 knots in the afternoon.
Thursday Wind light.
Friday Wind light becoming northeast 15 knots late in the day.

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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 1 June 2015 Forecasts have ended for the season.

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 10:30 AM EDT 03 August 2015

'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 3 August 2015 Today Tonight and Tuesday At 10:30 a.m. EDT today quasi-stationary low 998 mb located
southeast of James Bay.

At 10:30 a.m. EDT today trough located from the low to Ottawa then
to Lake Ontario.
By 10:30 a.m. EDT Tuesday trough located on a line
northeast-southwest over New England.

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