Western Lake Superior

Forecast

Marine Forecast

Issued 10:46 AM EST 01 March 2017

Today Tonight and Thursday

Wind northeast 25 knots backing to north 20 near noon then diminishing to north 15 near midnight.

Chance of flurries Thursday morning and afternoon.

Freezing spray warning in effect.

Freezing spray ending this evening.

Waves

Issued 10:47 AM EST 01 March 2017
Today Tonight and Thursday Waves 2 metres subsiding to one early this evening.

Extended Forecast

Issued 03:00 AM EST 01 March 2017
Friday Wind north 20 knots diminishing to light in the afternoon.
Saturday Wind southeast 15 knots increasing to southeast 30 late in the day.
Sunday Wind southeast 30 knots.

Ice Forecast*

Issued 12:00 PM EST 1 March 2017 Today Tonight and Thursday Open water except 2 tenths of medium lake ice in Thunder Bay and along parts of the southern shore becoming 7 tenths of new lake ice including 2 tenths of medium 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

 

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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 1 March 2017 Today Tonight and Thursday

Ice Coverage

Open water except 2 tenths of medium lake ice in Thunder Bay and
along parts of the southern shore becoming 7 tenths of new lake ice
including 2 tenths of medium 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 10:46 AM EST 01 March 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 10:30 AM EST 1 March 2017 Today Tonight and Thursday At 10:30 a.m. EST today deepening low 994 mb located east of
Lake Michigan.
By 10:30 a.m. EST Thursday low 982 mb located over New Brunswick.

At 10:30 a.m. EST today trough from low located on a line
northeast-southwest over southern Ontario.
By 10:30 a.m. EST Thursday trough from low located on a line
northeast-southwest over the Gulf of St. Lawrence.

At 10:30 a.m. EST today high 1026 mb located over northeastern
Ontario.
By 10:30 a.m. EST Thursday dissipating high 1020 mb located over
northern Quebec.

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