Western Lake Superior

Forecast

Marine Forecast

Issued 03:00 AM EDT 22 October 2017

Today Tonight and Monday.

Strong wind warning in effect.

Wind south 25 knots veering to southwest 20 this morning then diminishing to southwest 15 Monday afternoon. Wind diminishing to variable 10 Monday evening.

A few showers today. Risk of thunderstorms early this morning. Chance of showers beginning Monday morning.

Waves

Issued 03:00 AM EDT 22 October 2017
Today Tonight and Monday. Waves 2 metres subsiding to one and one half metres near noon and to one Monday evening.

Extended Forecast

Issued 03:00 AM EDT 22 October 2017
Tuesday Wind variable 15 knots increasing to north 35 in the morning then diminishing to north 30 late in the day.
Wednesday Wind north 30 knots diminishing to north 15.
Thursday Wind light increasing to southeast 30 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

Warnings (In effect)

Strong wind warning in effect

Western Lake Superior

Issued 03:00 AM EDT 22 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.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 22 October 2017 Today Tonight and Monday At 3:00 a.m. EDT today ridge located on a line north-south over
New Brunswick.
By 3:00 a.m. EDT Monday ridge located on a line north-south over
the Gulf of St. Lawrence.

At 3:00 a.m. EDT today low 990 mb located over northeastern
Manitoba.
By 3:00 a.m. EDT Monday low 970 mb located north of Hudson Bay.

At 3:00 a.m. EDT today cold front located on a line north-south
over western Wisconsin.
By 3:00 a.m. EDT Monday cold front located on a line
northeast-southwest over central Lake Huron.

Great Lakes - Lake Superior Area

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Features

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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