Eastern Lake Superior, Canada Marine Forecast, Warnings and Alerts

Canada

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Eastern Lake Superior

Marine Forecast

Issued 03:00 AM EDT 21 May 2025

Today Tonight and Thursday.

Strong wind warning in effect.

Wind northeast 25 knots diminishing to northeast 15 this afternoon then increasing to northeast 20 near midnight. Wind diminishing to north 15 Thursday morning then increasing to north 20 Thursday afternoon.

Winds

Issued 03:00 AM EDT 21 May 2025

Today Tonight and Thursday. Strong wind warning in effect. Wind northeast 25 knots diminishing to northeast 15 this afternoon then increasing to northeast 20 near midnight. Wind diminishing to north 15 Thursday morning then increasing to north 20 Thursday afternoon.

Waves

Issued 03:00 AM EDT 21 May 2025

Today Tonight and Thursday. Waves 1.5 metres subsiding to 0.5 to 1 early this evening then building to 1.5 overnight. Waves subsiding to 0.5 to 1 Thursday morning then building to 1 to 1.5 Thursday evening.

Ice Forecasts

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

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Superior

Issued 03:00 AM EDT 21 May 2025

'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.

Technical Marine Synopsis

Issued 3:00 AM EDT 21 May 2025 Today Tonight and Thursday At 3:00 a.m. EDT today ridge located from Hudson Bay to Sault
Ste. Marie.
By 3:00 a.m. EDT Thursday ridge located from Hudson Bay to Lake
of the Woods.

At 3:00 a.m. EDT today low 1002 mb located over Indiana.
By 3:00 a.m. EDT Thursday low 1001 mb located over eastern Lake
Erie.

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