Eastern Lake Superior


Marine Forecast

Issued 06:30 PM EDT 28 June 2017

Tonight and Thursday.

Strong wind warning in effect.

Wind southeast 15 knots increasing to southeast 20 this evening then backing to east 25 late overnight. Wind backing to northeast 20 Thursday morning then diminishing to variable 10 Thursday evening.

Showers ending Thursday evening with a risk of thunderstorms.


Issued 06:30 PM EDT 28 June 2017
Tonight and Thursday. Waves one half metre building to one near midnight and to 2 early Thursday morning. Waves subsiding to one near noon Thursday and to less than one half metre Thursday evening.

Extended Forecast

Issued 06:30 PM EDT 28 June 2017
Friday Wind light.
Saturday Wind north 15 knots.
Sunday Wind northwest 15 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

Eastern Lake Superior

Issued 7:57 PM EDT 28 June 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 6:30 PM EDT 28 June 2017 Tonight and Thursday At 6:30 p.m. EDT tonight ridge located on a line north-south over
southern Ontario.
By 6:30 p.m. EDT Thursday ridge located on a line
northeast-southwest over the Eastern Seaboard.

At 6:30 p.m. EDT tonight low 999 mb located over central Minnesota.
By 6:30 p.m. EDT Thursday low 1003 mb located over Whitefish Bay.

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