Western Lake Superior


Marine Forecast

Issued 06:30 PM EDT 20 July 2017

Tonight and Friday.

Wind southwest 10 knots becoming light this evening. Wind light Friday.

Fog patches forming near midnight.


Issued 06:30 PM EDT 20 July 2017
Tonight and Friday. Waves less than one half metre.

Extended Forecast

Issued 06:30 PM EDT 20 July 2017
Saturday Wind light.
Sunday Wind east 15 knots diminishing to light.
Monday Wind light.

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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.

No watches or warnings in effect.


Technical Marine Synopsis

Issued 6:30 PM EDT 20 July 2017 Tonight and Friday At 6:30 p.m. EDT tonight departing trough located on a line
northeast-southwest over northeastern Ontario.

At 6:30 p.m. EDT tonight ridge located on a line northwest-southeast
over Minnesota.
By 6:30 p.m. EDT Friday ridge located over eastern Lake Superior.

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