Marine Forecast
Issued 03:00 AM EST 18 December 2025
Today Tonight and Friday.
Storm warning in effect.
Wind light increasing to southerly 20 knots this afternoon and
to southwest 40 to 50 Friday afternoon. Wind diminishing to west 30 to 40 Friday
evening.
Rain beginning overnight changing to snow Friday evening.
Visibility as low as 1 mile in snow.
Temperatures minus 5 rising to plus 7 Friday morning then
falling to minus 3 Friday evening.
Strong wind warning program has ended for the season.
Winds
Issued 03:00 AM EST 18 December 2025
Today Tonight and Friday.
Storm warning in effect.
Wind light increasing to southerly 20 knots this afternoon and
to southwest 40 to 50 Friday afternoon. Wind diminishing to west 30 to 40 Friday
evening.
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 as low as 1 mile in snow.
Air temperature
Issued 03:00 AM EST 18 December 2025
Today Tonight and Friday.
Temperatures minus 5 rising to plus 7 Friday morning then
falling to minus 3 Friday evening.
There is no ice forecast issued for this area.
Warnings (In effect)
Montréal to Trois-Rivières
Issued 03:00 AM EST 18 December 2025'Storm' force winds of 48 to 63 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 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.