Eastern Lake Superior

Forecast

Marine Forecast

Issued 06:30 PM EDT 20 September 2017

Tonight and Thursday.

Strong wind warning in effect.

Wind south 20 knots diminishing to southwest 10 this evening then becoming light late overnight. Wind becoming southeast 10 Thursday evening.

A few showers ending near midnight with a risk of thunderstorms. Fog patches forming this evening and dissipating Thursday morning.

Waves

Issued 06:30 PM EDT 20 September 2017
Tonight and Thursday. Waves one metre subsiding to one half metre or less near midnight.

Extended Forecast

Issued 06:30 PM EDT 20 September 2017
Friday Wind light becoming southeast 15 knots in the afternoon.
Saturday Wind southeast 15 knots.
Sunday Wind light becoming south 15 knots late in the day.

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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

Eastern Lake Superior

Issued 6:30 PM EDT 20 September 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 6:30 PM EDT 20 September 2017 Tonight and Thursday At 6:30 p.m. EDT tonight ridge located on a line northeast-southwest
over eastern Ontario.
By 6:30 p.m. EDT Thursday ridge located on a line
northeast-southwest over New York State.

At 6:30 p.m. EDT tonight low 990 mb located over central Manitoba.
By 6:30 p.m. EDT Thursday low 1002 mb located over eastern
Hudson Bay.

At 6:30 p.m. EDT tonight trough from low located on a line
north-south over Lake Superior.
By 6:30 p.m. EDT Thursday trough from low located on a line
northeast-southwest over Georgian Bay.

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