Eastern Lake Superior


Marine Forecast

Issued 03:00 AM EDT 29 May 2017

Today Tonight and Tuesday.

Strong wind warning in effect.

Wind light becoming south 10 knots this morning then increasing to southwest 15 this afternoon. Wind increasing to west 20 overnight. Wind west 20 Tuesday.

A few showers and fog patches. Risk of thunderstorms today.


Issued 03:00 AM EDT 29 May 2017
Today Tonight and Tuesday. Waves one half metre or less building to one early this evening and to 2 Tuesday morning.

Extended Forecast

Issued 03:00 AM EDT 29 May 2017
Wednesday Wind northwest 15 knots.
Thursday Wind west 15 knots backing to south 15.
Friday Wind north 15 knots.

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Weather Conditions

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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

Eastern Lake Superior

Issued 03:00 AM EDT 29 May 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 3:00 AM EDT 29 May 2017 Today Tonight and Tuesday At 3:00 a.m. EDT today quasi-stationary ridge located on a line
northeast-southwest over Maine.

At 3:00 a.m. EDT today low 1000 mb located north of Lake Superior.
By 3:00 a.m. EDT Tuesday low 995 mb located west of James Bay.

At 3:00 a.m. EDT today dissipating trough from low located on a
line northwest-southeast over eastern Lake Erie.

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