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Prescott to Cornwall

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 13 June 2026

Tonight and Sunday.

Wind southwest 15 knots diminishing to southwest 10 this evening then becoming light early Sunday morning. Wind becoming southwest 10 near noon Sunday then veering to west 10 Sunday evening.

Scattered showers changing to rain Sunday morning. Risk of thunderstorms tonight and Sunday.

Extended Forecast

Issued 06:30 PM EDT 13 June 2026
Monday Wind light becoming southwest 15 knots in the morning then diminishing to light late in the day.
Tuesday Wind light becoming southwest 15 knots.
Wednesday Wind light.

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

There is no ice forecast issued for this area.

Warnings

Watches (In effect)

Squall watch in effect

Prescott to Cornwall

Issued 6:57 PM EDT 13 June 2026 Conditions are favourable for the development of squalls with wind gusts up to 40 knots this evening. Sizeable hail may also be a concern.

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 6:30 PM EDT 13 June 2026 Tonight and Sunday At 6:30 p.m. EDT tonight trough located on a line
northeast-southwest over northeastern Ontario.
By 6:30 p.m. EDT Sunday trough located on a line northeast-southwest
over eastern Ontario.

At 6:30 p.m. EDT tonight low 996 mb located over western James Bay.
By 6:30 p.m. EDT Sunday low 998 mb located over eastern Hudson Bay.

At 6:30 p.m. EDT tonight departing ridge located on a line
northeast-southwest over Ohio.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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