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Prescott to Cornwall

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 29 April 2025

Today Tonight and Wednesday.

Wind south 15 knots veering to southwest 20 near noon then to northwest 15 near midnight. Wind diminishing to northwest 10 early Wednesday morning then becoming light near noon Wednesday.

Showers this afternoon and this evening with a risk of thunderstorms.

Extended Forecast

Issued 03:00 AM EDT 29 April 2025
Thursday Wind light.
Friday Wind light increasing to southwest 20 knots.
Saturday Wind 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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land station Land Station
Ice Conditions

There is no ice forecast issued for this area.

Warnings

Watches (In effect)

Squall watch in effect

Prescott to Cornwall

Issued 5:49 PM EDT 29 April 2025 Conditions are favourable for the development of squalls with wind gusts up to 50 knots and hail.

A line of thunderstorms may cross the waters this afternoon into early this evening. The main threat is squalls to 50 knots. Hail is also possible.

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 10:30 AM EDT 29 April 2025 Today Tonight and Wednesday At 10:30 a.m. EDT today low 997 mb located over northeastern
Ontario.
By 10:30 a.m. EDT Wednesday low 990 mb located over eastern Quebec.

At 10:30 a.m. EDT today ridge located on a line northeast-southwest
over the Ontario - Manitoba border.
By 10:30 a.m. EDT Wednesday ridge located on a line
northeast-southwest over Whitefish Bay.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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