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Eastern Lake Ontario

Forecast

Marine Forecast

Issued 11:18 AM EDT 30 September 2020

Today Tonight and Thursday.

Strong wind warning in effect. Waterspout watch in effect.

Wind southwest 30 knots diminishing to west 15 near noon Thursday and to west 10 Thursday evening.

Scattered thunderstorms or scattered waterspouts late this morning. Scattered waterspouts overnight and Thursday morning. Risk of thunderstorms and waterspouts this afternoon and this evening. Risk of thunderstorms Thursday afternoon and evening.

Waves

Issued 10:30 AM EDT 30 September 2020
Today Tonight and Thursday. Waves one metre building to one and one half metres near noon and to 2 to 3 early this evening. Waves subsiding to one Thursday afternoon and to one half metre Thursday evening.

Extended Forecast

Issued 03:00 AM EDT 30 September 2020
Friday Wind west 15 knots diminishing to light in the morning.
Saturday Wind northwest 15 knots diminishing to light.
Sunday Wind light becoming south 15 knots.

Ice Forecast*

Issued 12:00 PM EDT 17 May 2020 Today Tonight and Monday Forecasts available to mariners upon request.

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

 

[ Canadian Ice Service ]

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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 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
Legend:
buoy Buoy
land station Land Station
Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 17 May 2020 Today Tonight and Monday

Ice Coverage

Forecasts available to mariners upon request.

Warnings

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 11:18 AM EDT 30 September 2020

'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

Eastern Lake Ontario

Issued 11:16 AM EDT 30 September 2020 Conditions are favourable for the development of waterspouts.

Risk of waterspouts will continue this afternoon and evening.

More widespread waterspout development is expected overnight through Thursday morning.

Mariners are urged to take all necessary precautions and prepare for the possibility of waterspout activity. Postpone voyage or seek safe harbour if possible.

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 30 September 2020 Today Tonight and Thursday At 10:30 a.m. EDT today departing low 982 mb located east of
Hudson Bay.

At 10:30 a.m. EDT today trough from low located on a line
northeast-southwest over Whitefish Bay.
By 10:30 a.m. EDT Thursday trough from low located on a line
northeast-southwest over Lake Huron.

At 10:30 a.m. EDT today deepening low 990 mb located east of
Montréal.
By 10:30 a.m. EDT Thursday low 964 mb located over northern
Labrador.

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