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Laurentian Fan

Warnings

Forecast

Marine Forecast

Issued 03:30 PM AST 11 December 2025

Tonight and Friday.

Storm warning in effect.

Wind southwest 40 knots diminishing to west 20 late this afternoon then increasing to west 35 late overnight. Wind increasing to west 50 late Friday morning.

Rain with a risk of thunderstorms changing to showers Friday morning.

Waves

Issued 05:00 PM AST 11 December 2025

Laurentian Fan - northwestern half

Tonight and Friday. Seas 4 metres building to 5 to 7 Friday morning.

Laurentian Fan - southeastern half

Tonight and Friday. Seas 4 to 6 metres subsiding to 4 late this evening then building to 5 to 7 Friday morning.

Extended Forecast

Issued 03:30 PM AST 11 December 2025
Saturday Wind west 35 knots diminishing to west 25 in the afternoon.
Sunday Wind west 20 knots increasing to south 30.
Monday Wind south 35 knots increasing to northwest 50.

Ice Forecast

Issued 10:00 AM EST 11 December 2025 Today Tonight and Friday Ice free. 

[ Canadian Ice Service ]

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Map of Atlantic - Maritimes marine weather areas Summerside Stephenville Airport North Cape Burgeo Pointe-des-Monts Port aux Basques Sagona Island St. Lawrence Tracadie Winterland Branch Hill Wreckhouse Halifax Harbour - 44258 LaHave Bank - 44150 Sept-Îles Airport Banquereau - 44139 Longue-Pointe-de-Mingan Île Rouge Île aux Perroquets Havre-Saint-Pierre Airport East Scotia Slope - 44137 Baie-Comeau Airport Mont-Joli Airport Rivière-la-Madeleine Saint John Airport Gaspé Airport Point Lepreau Greater Moncton Roméo LeBlanc Int'l Airport Heath Point Miscou Island Kouchibouguac Îles de la Madeleine Airport Kouchibouguac La Pocatière Grand Manan St. Stephen Fundy Park (Alma) New Carlisle Miramichi Pointe-au-Père Charlo Port Menier Bathurst Airport Île Bicquette Bas Caraquet Cap-Chat East Chedabucto Bay – 44488 West Chedabucto Bay – 44489 Lunenburg Charlottetown Airport Yarmouth Airport Pointe-Noire Western Head J.A. Douglas McCurdy Sydney Airport Shearwater Airport St.Paul Island Sable Island Parrsboro North Mountain Nappan AAFC McNabs Island East Point Kentville AAFC Ingonish Beach Hart Island CFB Greenwood Grand Étang Eskasoni (First Nations) Debert Caribou Point Brier Island Cap-d'Espoir Beaver Island Baccaro Point
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Ice Conditions

Ice Forecasts

Issued 10:00 AM EST 11 December 2025 Today Tonight and Friday

Ice Edge

First ice edge estimated from 4723N 6136W to 4738N 6112W to 4744N
6124W to 4734N 6159W to 4706N 6212W to 4706N 6147W to 4723N 6136W.
Sea ice within the ice edge.

Second ice edge estimated from Nova Scotia near 4551N 6201W to
Prince Edward Island near 4621N 6211W. Sea ice west of the ice edge.

Third ice edge estimated from Prince Edward Island near 4628N 6231W
to 4640N 6329W to 4736N 6409W to 4904N 6404W to 4925N 6516W to 4916N
6703W to 4956N 6635W to Anticosti Island near 4924N 6336W. Sea ice
west then north of the ice edge.

Fourth ice edge estimated from Anticosti Island near 4945N 6301W to
4946N 5954W to 5106N 5804W to Newfoundland near 5029N 5728W. Sea ice
north of the ice edge.

Ice Coverage

Ice free.

 

Iceberg Bulletin

Issued 1:30 PM EST 11 December 2025

Iceberg Limit

Iceberg limit at 0000 UTC 12 Dec estimated from Newfoundland near
4730N 5239W to 4730N 5030W to 5200N 4915W to 5945N 5730W to 6155N
5330W to 6005N 4945W then northeastward.

Iceberg Count

No confirmed icebergs.
Warnings

Warnings (In effect)

Storm warning in effect

Laurentian Fan

Issued 3:30 PM AST 11 December 2025

'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.

Synopsis

Technical Marine Synopsis

Issued 3:30 PM AST 11 December 2025 Tonight and Friday At 3:30 p.m. AST today trough located on a line northeast-southwest
over Laurentian Fan.
By 8:00 p.m. AST tonight departing trough located over the Grand
Banks.

At 3:30 p.m. AST today low 984 mb located near Anticosti Island.
By 8:00 p.m. AST Friday departing low 968 mb located over Labrador
Sea.

Marine Weather Statement

Issued 3:20 PM AST 11 December 2025 A trough of low pressure over Laurentian Fan is departing the area
and will lie over the Grand Banks by late this evening. Strong to
gale force southerly winds associated with this feature are
diminishing.

A low pressure system near Anticosti Island will continue slowly
moving north-northeastward to lie over the Strait of Belle Isle by
Friday afternoon. Strong to gale force westerly winds will
Intensify south of the low. On Friday, westerly winds will intensify
to storm force strength over southeastern waters. Winds will begin to
diminish Friday night as the low departs the region to the northeast.

Marine interests are advised that storm warnings are in effect for
East Scotian Slope and Laurentian Fan. Gale warnings are in effect
for all remaining waters.

Additionally, freezing spray warnings are in effect for Fundy, Grand
Manan, Northumberland Strait, Gulf-Magdalen, Chaleur-Miscou and
Anticosti - northwestern half.

Atlantic - Maritimes Area

Another Region

Marine Weather for Canada

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