Western Lake Superior

Forecast

Marine Forecast

Issued 03:00 AM EST 16 December 2018

Today Tonight and Monday.

Wind south 20 knots veering to southwest 25 early this morning then to west 25 near noon. Wind veering to northwest 30 this evening then diminishing to northwest 20 Monday morning. Wind diminishing to northwest 15 Monday afternoon and to northwest 10 Monday evening.

Risk of freezing spray overnight and Monday morning.

Waves

Issued 03:00 AM EST 16 December 2018
Today Tonight and Monday. Waves 2 metres building to 3 this afternoon then subsiding to one and one half metres near noon Monday. Waves subsiding to one half metre or less Monday evening.

Extended Forecast

Issued 03:00 AM EST 16 December 2018
Tuesday Wind light increasing to south 20 knots in the morning and to south 30 in the afternoon.
Wednesday Wind southwest 25 knots diminishing to southwest 15.
Thursday Wind south 15 knots becoming north 15.

Ice Forecast*

Issued 12:00 PM EST 15 December 2018 Today Tonight and Sunday Ice free except 3 tenths new lake ice including 1 tenth thin lake ice along parts of the shore. 9 plus tenths thin lake ice including 4 tenths medium lake ice in Black Bay and Nipigon 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 Kenora Airport 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
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EST 15 December 2018 Today Tonight and Sunday

Ice Coverage

Ice free except 3 tenths new lake ice including 1 tenth thin lake
ice along parts of the shore. 9 plus tenths thin lake ice including
4 tenths medium lake ice in Black Bay and Nipigon Bay.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EST 16 December 2018 Today Tonight and Monday At 3:00 a.m. EST today departing ridge located on a line north-south
over Quebec.

At 3:00 a.m. EST today low located over southeastern Ohio.
By 3:00 a.m. EST Monday low located off New England.

At 3:00 a.m. EST today trough located on a line north-south over
northwestern Ontario.
By 3:00 a.m. EST Monday trough located on a line northeast-southwest
over Georgian Bay.

At 3:00 a.m. EST today ridge located on a line north-south over
Alberta.
By 3:00 a.m. EST Monday ridge located on a line north-south over
Manitoba.

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