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Trois-Rivières to Donnacona

Warnings

Forecast

Marine Forecast

Issued 05:46 PM EDT 29 April 2025

Tonight and Wednesday.

Wind southwest 20 to 30 knots with gusts to 45 near thunderstorms. Wind becoming west 20 to 30 near midnight then diminishing to northwest 15 early Wednesday morning. Wind diminishing to light Wednesday evening.

Showers ending after midnight with a risk of thunderstorms. Visibility as low as 1 mile in showers.

Extended Forecast

Issued 06:00 PM EDT 29 April 2025
Thursday Wind light.
Friday Wind easterly 10 to 20 knots becoming southwest 15 to 25 late in the day.
Saturday Wind southwest 15 knots diminishing to light.

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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

Watches (In effect)

Squall watch in effect

Trois-Rivières to Donnacona

Issued 5:45 PM EDT 29 April 2025 Conditions are favourable for the development of squalls with wind gusts up to 45 knots and frequent lightning.

This evening, conditions are favourable for the development of squalls accompanied by gusts up to 45 knots and frequent lightning.

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 PM EDT 29 April 2025 Tonight and Wednesday At 3:00 p.m. EDT today departing ridge located from Cape Hatteras
to Newfoundland.

At 3:00 p.m. EDT today low 996 mb located over Lake Superior.
By 8:00 p.m. EDT Wednesday low 993 mb located near the Quebec
Lower North Shore.

At 8:00 p.m. EDT tonight high 1021 mb located over Lake Superior.
By 8:00 p.m. EDT Wednesday high 1023 mb located over western Quebec.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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