Cornwall to Montréal
Forecast
Marine Forecast
Issued 03:00 AM EDT 19 June 2025
Today Tonight and Friday.
Strong wind warning in effect.
Wind light increasing to southwest 10 to 15 knots this morning and to southwest 15 to 25 late this afternoon. Wind veering to northwesterly 15 to 25 overnight then diminishing to southwest 10 to 15 Friday evening.
Showers today and this evening with a risk of thunderstorms. Showers Friday evening with a risk of thunderstorms. Fog banks forming overnight and dissipating Friday morning. Visibility as low as 1 mile in showers and 1 mile or less in fog banks.
Extended Forecast
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Weather Conditions
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Ice Conditions
There is no ice forecast issued for this area.
Warnings
Warnings (In effect)
Strong wind warning in effect
Cornwall to Montréal
Issued 03:00 AM EDT 19 June 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.
Watches (In effect)
Squall watch in effect
Cornwall to Montréal
Issued 09:25 AM EDT 19 June 2025 Conditions are favourable for the development of squalls with wind gusts up to 50 knots.This afternoon and this evening, conditions will be favourable for the development of squalls with gusts of up to 50 knots.
Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway.
Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
Synopsis
Technical Marine Synopsis
Issued 3:00 AM EDT 19 June 2025 Today Tonight and Friday At 3:00 a.m. EDT today low 1002 mb located over western Lake Huron.By 8:00 p.m. EDT Friday low 996 mb located over Chaleur Bay.
At 3:00 a.m. EDT today high 1017 mb located on a line north-south
over western Lake Superior.
By 8:00 p.m. EDT Friday high 1017 mb located on a line north-south
over Lake Erie.
Great Lakes - Lake Huron Area
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