Lake St. Clair


Marine Forecast

Issued 06:30 PM EDT 22 June 2017

Tonight and Friday.

Squall watch in effect.

Wind southwest 15 knots with gusts to 45 near thunderstorms late this evening. Wind diminishing to southwest 10 late overnight then veering to northwest 10 Friday afternoon.

A few showers and scattered thunderstorms beginning this evening and ending Friday evening.


Issued 06:30 PM EDT 22 June 2017
Tonight and Friday. Waves one half metre or less.

Extended Forecast

Issued 06:30 PM EDT 22 June 2017
Saturday Wind light.
Sunday Wind light becoming west 15 knots.
Monday Wind light.

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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 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 27 April 2017 Forecasts have ended for the season.

Watches (In effect)

Squall watch in effect

Lake St. Clair

Issued 6:22 PM EDT 22 June 2017 Conditions are favourable for the development of squalls with wind gusts up to 45 knots and hail.

Squalls are expected this evening.

Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway.

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


Technical Marine Synopsis

Issued 6:30 PM EDT 22 June 2017 Tonight and Friday At 6:30 p.m. EDT tonight ridge located on a line north-south over
New England.
By 6:30 p.m. EDT Friday ridge located east of the Maritimes.

At 6:30 p.m. EDT tonight low 997 mb located over northwestern
By 6:30 p.m. EDT Friday low 991 mb located over central Quebec.

At 6:30 p.m. EDT tonight trough from low located on a line
northeast-southwest over Lake Superior.
By 6:30 p.m. EDT Friday trough from low located on a line
northeast-southwest over the St. Lawrence River.

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