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Western Lake Ontario

Forecast

Marine Forecast

Issued 03:00 AM EDT 29 July 2021

Today Tonight and Friday.

Strong wind warning in effect.

Wind southeast 10 knots increasing to variable 15 near noon then becoming northwest 15 early this evening. Wind increasing to north 20 overnight then diminishing to northwest 15 Friday morning.

Scattered showers today and this evening with a risk of thunderstorms.

Waves

Issued 03:00 AM EDT 29 July 2021
Today Tonight and Friday. Waves one half metre or less building to one half to one metre this afternoon then subsiding to less than one half metre Friday evening.

Extended Forecast

Issued 03:00 AM EDT 29 July 2021
Saturday Wind west 15 knots.
Sunday Wind southwest 15 knots increasing to north 20.
Monday Wind north 15 knots becoming southwest 15.

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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 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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land station Land Station
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

Warnings (In effect)

Special marine warning in effect

Western Lake Ontario

Issued 08:15 AM EDT 29 July 2021 Wind gusts up to 30 knots, frequent lightning and poor to very poor visibility in thunderstorms heavy at times are expected or occurring in the area.

Thunderstorms from Southern Ontario will move across the lake this morning. Wind gusts to 30 knots are possible.

Visibility could suddenly be reduced to half a mile or less in torrential downpours during the thunderstorms.

The thunderstorms should move to the southeast of the waters by noon.

Vessels without lightning protection should make their way to shore immediately. Poor to very poor visibility may contribute to voyage delays and make marine navigation hazardous. Mariners are advised to prepare for strong winds. If underway, plan to seek safe harbour.

Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Strong wind warning in effect

Western Lake Ontario

Issued 03:00 AM EDT 29 July 2021

'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.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 29 July 2021 Today Tonight and Friday At 3:00 a.m. EDT today trough located on a line northeast-southwest
over Lake Michigan.
By 3:00 a.m. EDT Friday trough located on a line north-south over
southern Quebec.

At 3:00 a.m. EDT today ridge located on a line north-south over
western Manitoba.
By 3:00 a.m. EDT Friday approaching ridge located on a line
northeast-southwest over northwestern Ontario.

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