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Trois-Rivieres to Donnacona

Marine Forecast

Issued 03:00 AM EST 18 December 2025

Today Tonight and Friday.

Gale warning in effect.

Wind light increasing to southeasterly 20 knots Friday morning and to southwest 35 to 45 Friday afternoon.

Rain beginning overnight changing to snow Friday evening. Visibility 1 mile or less in snow.

Temperatures minus 11 rising to plus 9 near noon Friday then falling to minus 4 Friday evening.

There is no ice forecast issued for this area.

Warnings (In effect)

Gale warning in effect

Trois-Rivières to Donnacona

Issued 03:00 AM EST 18 December 2025

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. 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 EST 18 December 2025 Today Tonight and Friday At 3:00 a.m. EST today ridge located on a line north-south over
Trois-Rivières.
By 7:00 p.m. EST tonight departing ridge located on a line
northwest-southeast over the Gulf of St. Lawrence.

At 7:00 p.m. EST tonight low 989 mb located over Lake Superior.
By 7:00 p.m. EST Friday low 972 mb located north of Lake Saint-Jean.




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