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Western Lake Superior

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 18 May 2024

Tonight and Sunday.

Strong wind warning in effect.

Wind south 20 knots with gusts to 50 near thunderstorms. Wind diminishing to southwest 15 this evening then increasing to southwest 20 Sunday morning. Wind diminishing to southwest 15 Sunday evening.

Scattered showers this evening with a risk of thunderstorms.

Waves

Issued 06:30 PM EDT 18 May 2024
Tonight and Sunday. Waves 1 to 1.5 metres subsiding to 0.5 to 1 near midnight then building to 1 to 1.5 near noon Sunday.

Extended Forecast

Issued 06:30 PM EDT 18 May 2024
Monday Wind light.
Tuesday Wind northeast 15 knots diminishing to light.
Wednesday Wind east 25 knots veering to south 20 late in the day.

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Map of Great Lakes - Lake Superior marine weather areas Mid Superior - 45001 East Superior - 45004 West Superior - 45006 Slate Island - 45136 Lake Of the Woods - 45148 Kenora Airport Royal Island Armstrong Airport Caribou Island Marathon Airport Pukaskwa National Park Thunder Bay Airport Welcome Island Little Flatland Island Sault Ste. Marie Airport Wawa 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

Western Lake Superior

Issued 6:30 PM EDT 18 May 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)

Squall watch in effect

Western Lake Superior

Issued 7:35 PM EDT 18 May 2024 Conditions are favourable for the development of squalls with wind gusts up to 50 knots and hail.

Thunderstorms are expected to move eastward across the area early this evening.

These thunderstorms will be capable of producing nickel to golf ball size hail.

Large hail can damage vessels and cause injury. 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.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 18 May 2024 Tonight and Sunday At 6:30 p.m. EDT tonight low 995 mb located over southern Manitoba.
By 6:30 p.m. EDT Sunday low 1000 mb located near Hudson Bay.

At 6:30 p.m. EDT tonight cold front located on a line north-south
over northwestern Ontario.
By 6:30 p.m. EDT Sunday weakening cold front located on a line
northeast-southwest over southern Ontario.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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