Western Lake Superior

Forecast

Marine Forecast

Issued 03:00 AM EST 27 February 2017

Today Tonight and Tuesday

Wind northwest 15 knots backing to southwest 15 this morning then to southeast 15 this evening. Wind veering to south 20 near midnight then increasing to north 25 Tuesday morning. Wind veering to northeast 30 Tuesday evening.

A few flurries and a few showers beginning near midnight and ending Tuesday evening. Visibility 1 mile or less in precipitation.

Freezing spray warning in effect.

Freezing spray ending this morning.

Waves

Issued 03:00 AM EST 27 February 2017
Today Tonight and Tuesday Waves 2 metres subsiding to less than one half metre early this morning then building to one near noon. Waves building to 2 overnight and to 3 Tuesday evening.

Extended Forecast

Issued 03:00 AM EST 27 February 2017
Wednesday Wind northeast 35 knots diminishing to northeast 20 in the morning.
Thursday Wind light increasing to north 20 knots.
Friday Wind northwest 20 knots diminishing to light late in the day.

Ice Forecast*

Issued 12:00 PM EST 26 February 2017 Today Tonight and Monday Open water becoming 5 tenths of new lake ice in Thunder Bay and along parts of the southern shore overnight. Consolidated thick lake ice in Black Bay, Nipigon Bay and Chequamegon Bay.

*Ice Forecast and Warnings also apply to U.S. waters

 

[ Canadian Ice Service ]

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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 EST 26 February 2017 Today Tonight and Monday

Ice Coverage

Open water becoming 5 tenths of new lake ice in Thunder Bay and
along parts of the southern shore overnight. Consolidated thick lake
ice in Black Bay, Nipigon Bay and Chequamegon Bay.

Warnings

Warnings (In effect)

Freezing spray warning in effect

Western Lake Superior

Issued 05:05 AM EST 27 February 2017

Moderate or severe freezing spray is 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 EST 27 February 2017 Today Tonight and Tuesday At 3:00 a.m. EST today departing trough located on a line
northeast-southwest over northeastern Ontario.

At 3:00 a.m. EST today ridge located on a line north-south over
Lake Superior.
By 3:00 a.m. EST Tuesday ridge located on a line north-south
over Maine.

By 3:00 a.m. EST Tuesday trough located on a line
northeast-southwest over central Minnesota.

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