Lake St. Clair
Forecast
Marine Forecast
Issued 10:30 AM EST 10 November 2025
Today Tonight and Tuesday.
Strong wind warning in effect.
Wind northwest 20 knots diminishing to northwest 15 this afternoon then backing to west 15 near midnight. Wind increasing to southwest 20 near noon Tuesday and to southwest 25 Tuesday evening.
Scattered flurries this afternoon and this evening. Flurries Tuesday afternoon and evening.
Waves
Issued 10:30 AM EST 10 November 2025
Today Tonight and Tuesday.
Waves 1 metre subsiding to 0.5 early this evening then building
to 1 Tuesday afternoon. Waves building to 1 to 1.5 Tuesday
evening.
Extended Forecast
Issued 03:00 AM EST 10 November 2025
Wednesday
Wind southwest 25 knots.
Thursday
Wind west 15 knots diminishing to
light.
Friday
Wind light.
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Weather Conditions
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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
Warnings (In effect)
Strong wind warning in effect
Lake St. Clair
Issued 10:30 AM EST 10 November 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.
Synopsis
Technical Marine Synopsis
Issued 10:30 AM EST 10 November 2025 Today Tonight and Tuesday At 10:30 a.m. EST today low 1004 mb located east of the EasternSeaboard.
By 10:30 a.m. EST Tuesday low 980 mb located over central Quebec.
At 10:30 a.m. EST today ridge located on a line north-south over
northwestern Ontario.
By 10:30 a.m. EST Tuesday ridge located on a line north-south over
northeastern Ontario.
By 10:30 a.m. EST Tuesday trough located over northwestern Ontario.
Great Lakes - Lake Huron Area
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