Cornwall to Montréal
Forecast
Marine Forecast
Issued 03:00 PM EDT 20 April 2021
Tonight and Wednesday.
Wind southwest 20 to 30 knots diminishing to southwest 10 to 20 early this evening then becoming light near midnight. Wind light Wednesday.
Snow Wednesday afternoon and evening. Visibility as low as 1 mile in snow.
Temperatures plus 9 falling to zero Wednesday evening.
Strong wind warning program has ended for the season.
Extended Forecast
Issued 06:00 PM EDT 20 April 2021
Thursday
Wind west 20 knots.
Friday
Wind west 20 knots.
Saturday
Wind southwest 15 knots diminishing to light
late in the day.
Stay connected
Weather Conditions
Zoom-in to make a selection

Ice Conditions
Warnings
No watches or warnings in effect.
Synopsis
Technical Marine Synopsis
Issued 3:00 PM EDT 20 April 2021 Tonight and Wednesday At 3:00 p.m. EDT today trough located on a line north-south overTadoussac.
By 8:00 a.m. EDT Wednesday departing trough located on a line
northwest-southeast over Anticosti Island.
At 8:00 a.m. EDT Wednesday low 1004 mb located southeast of the
Great Lakes.
By 8:00 p.m. EDT Wednesday intensifying low 994 mb located over
Maine.
Great Lakes - Lake Huron Area
Another Region
What we are doing
Weather Forecasts
Weather Alerts
Weather Resources
- Date modified: