Cornwall to Montréal

Forecast

Marine Forecast

Issued 08:59 AM EDT 21 September 2018

Today Tonight and Saturday.

Storm warning in effect. Squall watch in effect.

Wind southerly 15 to 25 knots and locally gusts to 35 near thunderstorms. Wind becoming southerly 25 to 35 early this afternoon then increasing to southwest 40 to 50 early this evening. Wind diminishing to west 25 to 35 near midnight and to northwest 15 to 25 late overnight. Wind diminishing to northwest 10 to 15 Saturday morning and to light Saturday afternoon.

Periods of rain ending near midnight with a risk of thunderstorms.

Extended Forecast

Issued 06:00 AM EDT 21 September 2018
Sunday Wind southwest 10 to 15 knots becoming northerly 10 to 15 in the afternoon.
Monday Wind northeast 15 knots.
Tuesday Wind southerly 20 knots.

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Map of St. Lawrence - St. Lawrence River marine weather areas Mont-Louis - 45138 Lake Nipissing - 45152 North Bay Airport Beauport Deschambault Île d'Orléans L'Assomption Trois-Rivières Airport Île aux-Grues Lac Saint-Pierre Montréal-Trudeau Int'l Airport Saint-Hubert Airport Lac Memphrémagog Sainte-Anne-de-Bellevue Saint-Anicet Baie-Comeau Airport Cap-Rouge Île Rouge Pointe de l'Islet Pointe Claveau Sept-Îles Airport Pointe-des-Monts Pointe-Noire Cap-d'Espoir Rivière-la-Madeleine Gaspé Airport La Pocatière Mont-Joli Airport New Carlisle Pointe-au-Père Port Menier Île Bicquette Cap-Chat CFB Bagotville Jonquière Mistook Normandin Roberval Airport Bas Caraquet Bathurst Airport Bouctouche AAFC Charlo Miramichi Fundy Park (Alma) Grand Manan Kouchibouguac Miscou Island Greater Moncton Roméo LeBlanc Int'l Airport Point Lepreau Saint John Airport St. Stephen Brier Island Yarmouth Airport North Cape
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Warnings

Warnings (In effect)

Storm warning in effect

Cornwall to Montréal

Issued 08:59 AM EDT 21 September 2018

'Storm' force winds of 48 to 63 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 08:57 AM EDT 21 September 2018 Conditions are favourable for the development of squalls with wind gusts up to 35 knots.

Thunderstorms will affect the area until about 11:00 AM this morning.

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 21 September 2018 Today Tonight and Saturday At 3:00 a.m. EDT today ridge located on a line northwest-southeast
over Tadoussac.
By 10:00 a.m. EDT today departing ridge located on a line
northwest-southeast over the Gulf of St. Lawrence.

At 3:00 a.m. EDT today cold front located on a line
northeast-southwest over Lake Michigan.
By 8:00 p.m. EDT Saturday cold front located on a line north-south
over Newfoundland.

At 3:00 a.m. EDT Saturday ridge located on a line
northeast-southwest over Lake Michigan.
By 8:00 p.m. EDT Saturday ridge located on a line north-south
over Rimouski.

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