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Eastern Lake Superior

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 15 June 2025

Today Tonight and Monday.

Wind light becoming southeast 10 knots near midnight. Wind southeast 10 Monday.

Scattered showers Monday evening with a risk of thunderstorms. Fog patches forming early Monday morning.

Waves

Issued 10:30 AM EDT 15 June 2025
Today Tonight and Monday. Waves less than 0.5 metres building to 0.5 late overnight.

Extended Forecast

Issued 03:00 AM EDT 15 June 2025
Tuesday Wind east 20 knots becoming west 20 in the afternoon.
Wednesday Wind light.
Thursday Wind light becoming northeast 15 knots.

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Map of Great Lakes - Lake Superior marine weather areas Pukaskwa National Park Marathon Airport Caribou Island Armstrong Airport Royal Island Kenora Airport Thunder Bay Airport Welcome Island Lake Of the Woods - 45148 Little Flatland Island Sault Ste. Marie Airport Wawa Airport Slate Island - 45136
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 15 June 2025 Today Tonight and Monday At 10:30 a.m. EDT today high 1025 mb located over James Bay.
By 10:30 a.m. EDT Monday high 1024 mb located near Nova Scotia.

By 10:30 a.m. EDT Monday low 1007 mb located over eastern South
Dakota.

Great Lakes - Lake Superior Area

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