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.
Strong wind warning program has ended for the season.
Winds
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.
Strong wind warning program has ended for the season.
Weather & Visibility
Issued 03:00 AM EST 18 December 2025
Today Tonight and Friday.
Rain beginning overnight changing to snow Friday evening.
Visibility 1 mile or less in snow.
Air temperature
Issued 03:00 AM EST 18 December 2025
Today Tonight and Friday.
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)
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.