Great Lakes - Western Lake Ontario Marine Forecast and Alerts

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Lake St. Clair

Marine Forecast

Issued 03:00 AM EDT 14 September 2026

Today Tonight and Tuesday.

Strong wind warning in effect.

Wind north 15 knots diminishing to north 10 early this morning then becoming light near noon. Wind becoming southeast 15 this evening then veering to south 15 overnight. Wind increasing to south 20 Tuesday morning then veering to southwest 20 Tuesday afternoon. Wind diminishing to southwest 15 Tuesday evening.

Scattered showers Tuesday evening with a risk of thunderstorms.

Winds

Issued 03:00 AM EDT 14 September 2026

Today Tonight and Tuesday. Strong wind warning in effect. Wind north 15 knots diminishing to north 10 early this morning then becoming light near noon. Wind becoming southeast 15 this evening then veering to south 15 overnight. Wind increasing to south 20 Tuesday morning then veering to southwest 20 Tuesday afternoon. Wind diminishing to southwest 15 Tuesday evening.

Waves

Issued 03:00 AM EDT 14 September 2026

Today Tonight and Tuesday. Waves 0.5 metres subsiding to less than 0.5 this morning then building to 0.5 to 1 near midnight.

Weather & Visibility

Issued 03:00 AM EDT 14 September 2026

Today Tonight and Tuesday. Scattered showers Tuesday evening with a risk of thunderstorms.

Ice Forecasts

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.

Warnings (In effect)

Strong wind warning in effect

Lake St. Clair

Issued 03:00 AM EDT 14 September 2026

'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.

Technical Marine Synopsis

Issued 3:00 AM EDT 14 September 2026 Today Tonight and Tuesday At 3:00 a.m. EDT today departing cold front located on a line
northeast-southwest over the East Coast of the U.S.

At 3:00 a.m. EDT today high 1024 mb located over Wisconsin.
By 3:00 a.m. EDT Tuesday high 1025 mb located over southern Quebec.

By 3:00 a.m. EDT Tuesday approaching low 991 mb located over
southeastern Manitoba.

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