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Anticosti - southwestern half

Warnings

Forecast

Marine Forecast

Issued 10:00 AM ADT 29 April 2025

Today Tonight and Wednesday.

Gale warning in effect.

Wind south 25 to 30 knots increasing to northwest 40 near noon Wednesday with gusts to 50 in the Honguedo Strait.

Periods of rain beginning overnight changing to periods of snow Wednesday evening. Visibility 1 mile or less in snow.

Waves

Issued 05:00 AM ADT 29 April 2025
Today Tonight and Wednesday. Seas 1 metre or less building to 1 to 2 this afternoon and to 2 to 3 late overnight. Seas building to 3 to 5 Wednesday afternoon.

Extended Forecast

Issued 03:00 AM ADT 29 April 2025
Thursday Wind northwest 30 to 40 knots diminishing to northwest 25 late in the day.
Friday Wind light becoming southeast 15 knots late in the day.
Saturday Wind south 25 knots.

Ice Forecast

Issued 10:00 AM EDT 29 April 2025 Today Tonight and Wednesday Open water. 

[ Canadian Ice Service ]

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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

Ice Forecasts

Issued 10:00 AM EDT 29 April 2025 Today Tonight and Wednesday

Ice Edge

Ice edge estimated from Quebec near 5013N 6207W to 4959N 6152W to
4959N 6028W to 5057N 5758W to Newfoundland near 5029N 5728W. Sea ice
north then east of the ice edge.

Ice Coverage

Open water.

 

Iceberg Bulletin

Issued 3:20 PM EDT 28 April 2025

Iceberg Limit

Iceberg limit at 0000 UTC 29 Apr estimated from Newfoundland near
4723N 5503W to 4040N 5210W to 4100N 4720W to 4600N 3205W to 5355N
4530W to 5915N 5605W to 6035N 5500W to 5920N 4925W then eastwards.

Western iceberg limit at 0000 UTC 29 Apr estimated from Quebec near
5020N 6115W to Newfoundland near 4805N 5845W.

Iceberg Count

No confirmed icebergs except less than 10 icebergs northeast of the
western iceberg limit.
Warnings

Warnings (In effect)

Gale warning in effect

Anticosti - southwestern half

Issued 10:00 AM ADT 29 April 2025

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 10:00 AM ADT 29 April 2025 Today Tonight and Wednesday At 10:00 a.m. ADT today low 997 mb located over the Great Lakes.
By 3:30 p.m. ADT Wednesday low 989 mb located near Anticosti Island.

At 10:00 a.m. ADT today ridge located over the Maritimes.
By 3:00 a.m. ADT Wednesday departing ridge located over the
southeastern Marine District.

Marine Weather Statement

Issued 9:37 AM ADT 29 April 2025 A low pressure system over the Great Lakes will track northeast
towards the marine district today and tonight to lie near Anticosti
Island by Wednesday afternoon. Strong southwesterlies ahead of the
low shift to strong to gale force northwesterlies behind it.

Marine interests are advised that gale warnings are in effect for
Gulf-Magdalen, Chaleur-Miscou and Anticosti.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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