Western Lake Superior


Marine Forecast

Issued 10:30 AM EDT 18 October 2017

Today Tonight and Thursday.

Strong wind warning in effect.

Wind south 20 knots veering to southwest 25 near noon then to west 30 this evening. Wind diminishing to southwest 15 Thursday evening.


Issued 10:30 AM EDT 18 October 2017
Today Tonight and Thursday. Waves one and one half metres building to 2 this afternoon and to 3 near midnight. Waves subsiding to one Thursday evening.

Extended Forecast

Issued 03:00 AM EDT 18 October 2017
Friday Wind southwest 15 knots.
Saturday Wind south 15 knots increasing to south 25.
Sunday Wind southwest 20 knots.

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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 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 Kenora 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 2017 Forecasts have ended for the season.

Warnings (In effect)

Strong wind warning in effect

Western Lake Superior

Issued 10:30 AM EDT 18 October 2017

'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.


Technical Marine Synopsis

Issued 10:30 AM EDT 18 October 2017 Today Tonight and Thursday At 10:30 a.m. EDT today quasi-stationary ridge located on a line
northeast-southwest over Virginia.

At 10:30 a.m. EDT today low 974 mb located over central Manitoba.
By 10:30 a.m. EDT Thursday low 982 mb located over eastern
Hudson Bay.

Great Lakes - Lake Superior Area

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Summer 2017: Significant weather across Canada

By analyzing weather events, ECCC is collecting more information as to how our climate is changing.

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