Eastern Lake Ontario


Marine Forecast

Issued 06:46 PM EDT 02 August 2015

Tonight and Monday

Strong wind warning in effect. Squall watch in effect.

Wind southwest 10 knots increasing to southwest 20 this evening with gusts to 50 near thunderstorms tonight. Wind diminishing to southwest 15 Monday afternoon.

Showers beginning this evening and ending near noon Monday with a risk of thunderstorms.


Issued 06:30 PM EDT 02 August 2015
Tonight and Monday Waves one half metre building to one and one half metres near midnight then subsiding to one Monday evening.

Extended Forecast

Issued 06:30 PM EDT 02 August 2015
Tuesday Wind light.
Wednesday Wind light becoming northwest 15 knots.
Thursday Wind northwest 15 knots diminishing to 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 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 7:40 PM EDT 02 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.

Watches (In effect)

Squall watch in effect

Eastern Lake Ontario

Issued 7:42 PM EDT 02 August 2015

A line of thunderstorms over Southern Lake Huron to Southern Georgian Bay is expected to move into the above mentioned regions. Some of these thunderstorms may reach severe limits with wind gusts of 40 knots or more. Large hail is also possible.

In effect from 07:43 P.M. to 01:00 A.M. Monday.

Mariners are advised to monitor this marine warning for the most current information.


Technical Marine Synopsis

Issued 6:30 PM EDT 2 August 2015 Tonight and Monday At 6:30 p.m. EDT tonight low 996 mb located near James Bay.
By 6:30 p.m. EDT Monday low 997 mb located east of James Bay.

At 6:30 p.m. EDT tonight trough located from the low to Whitefish
Bay then to Nebraska.
By 6:30 p.m. EDT Monday trough located on a line northeast-southwest
over New York State.

Great Lakes - Lake Erie and Lake Ontario Area

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