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Montréal to Trois-Rivières

Warnings

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 near noon and to southwest 15 to 25 early this evening. Wind veering to northwesterly 15 to 25 Friday morning then diminishing to west 10 to 15 Friday evening.

Showers today and this evening. Risk of thunderstorms today. 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

Issued 06:00 AM EDT 19 June 2025
Saturday Wind light becoming southerly 10 to 15 knots in the afternoon.
Sunday Wind southwest 10 to 15 knots.
Monday Wind southwest 10 to 15 knots.

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Map of St. Lawrence - St. Lawrence River marine weather areas Cap-Chat Mont-Joli Airport Bathurst Airport Île Bicquette Charlo Port Menier Miramichi Pointe-au-Père Fundy Park (Alma) New Carlisle Grand Manan Bas Caraquet CFB Bagotville Jonquière Mistook Normandin Roberval Airport Deschambault Beauport North Bay Airport Trois-Rivières Airport Lake Nipissing - 45152 Kouchibouguac Baie-Comeau Airport Île d'Orléans Saint-Anicet Sainte-Anne-de-Bellevue Cap-Rouge Lac Memphrémagog Saint-Hubert Airport Montréal-Trudeau Int'l Airport Île Rouge Lac Saint-Pierre L'Isle-aux-Grues L'Assomption Pointe de l'Islet Pointe Claveau Sept-Îles Airport Pointe-des-Monts North Cape Pointe-Noire Yarmouth Airport Cap-d'Espoir Brier Island Rivière-la-Madeleine St. Stephen Gaspé Airport Saint John Airport Point Lepreau Greater Moncton Roméo LeBlanc Int'l Airport Miscou Island Kouchibouguac La Pocatière
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Ice Conditions

There is no ice forecast issued for this area.

Warnings

Warnings (In effect)

Strong wind warning in effect

Montréal to Trois-Rivières

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

Montréal to Trois-Rivières

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.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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