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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 07 September 2024

Today Tonight and Sunday.

Strong wind warning in effect. Waterspout watch in effect.

Wind north 25 knots backing to northwest 20 this afternoon then increasing to northwest 25 late overnight. Wind backing to west 20 Sunday afternoon.

Scattered showers ending Sunday afternoon with a risk of waterspouts.

Waves

Issued 10:30 AM EDT 07 September 2024
Today Tonight and Sunday. Waves 2 metres subsiding to 1.5 early this evening then building to 2 early Sunday morning. Waves subsiding to 1 to 1.5 Sunday evening.

Extended Forecast

Issued 03:00 AM EDT 07 September 2024
Monday Wind west 15 knots diminishing to light in the morning.
Tuesday Wind light.
Wednesday 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 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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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 27 April 2024 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Georgian Bay

Issued 10:30 AM EDT 07 September 2024

'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)

Waterspout watch in effect

Northern Georgian Bay

Issued 05:17 AM EDT 07 September 2024 Conditions are favourable for the development of waterspouts.

Conditions will remain favourable today through tonight and into Sunday morning.

Wind speeds inside the spray ring of a waterspout are 45 knots or higher. Vulnerable vessels are at risk of damage or capsizing. Mariners are urged to take all necessary precautions and prepare for the possibility of waterspout activity. Postpone voyage or seek safe harbour if possible. Keep in mind that waterspouts cannot be seen at night and may strike suddenly. Waterspouts are generally short-lived in nature, typically lasting 20 minutes or less. Waterspouts sometimes appear as funnel clouds with swirling water visible near the surface.

Waterspouts are generated by weak rotation under rapidly growing clouds or weak thunderstorms. Under favourable conditions, this weak rotation could intensify and become a tornado.

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

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 7 September 2024 Today Tonight and Sunday At 10:30 a.m. EDT today low 1004 mb located over southern Quebec.
By 10:30 a.m. EDT Sunday low 998 mb located over central Quebec.

At 10:30 a.m. EDT today high 1027 mb located over western Wisconsin.
By 10:30 a.m. EDT Sunday high 1024 mb located over Illinois.

Great Lakes - Lake Erie and Lake Ontario Area

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