Marine Forecast

Issued 03:00 AM ADT 21 March 2018

Today Tonight and Thursday.

Gale warning in effect.

Wind northeast 15 knots increasing to northeast 25 this morning with gusts to 35 beginning this afternoon. Wind becoming northeast 35 this evening and locally gusts to 45 along the coast. Wind becoming north 35 Thursday evening.

Snow or rain beginning this afternoon. Visibility 1 mile or less in precipitation.

Temperatures zero rising to plus 6 Thursday morning.


Issued 05:00 AM ADT 21 March 2018
Today Tonight and Thursday. Seas 1 metre or less building to 1 to 2 this morning and to 2 to 3 this afternoon. Seas building to 3 to 5 this evening.

Extended Forecast

Issued 03:00 AM ADT 21 March 2018
Friday Wind northwest 25 to 30 knots diminishing to northwest 15 in the afternoon.
Saturday Wind northeast 15 knots increasing to northeast 25 late in the day.
Sunday Wind northeast 25 to 35 knots.

Ice Forecast

Issued 10:00 AM EDT 20 March 2018 Today Tonight and Wednesday Ice free. 

[ Canadian Ice Service ]

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Weather Conditions

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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 L'Assomption Trois-Rivières Airport Saint-Hubert Airport Baie-Comeau Airport Cap-Rouge Pointe de l'Islet Sept-Îles Airport Cap-d'Espoir Rivière-la-Madeleine Gaspé Airport La Pocatière Mont-Joli Airport New Carlisle Pointe-au-Père Port Menier 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 Île d'Orléans Île aux-Grues Lac Saint-Pierre Lac Memphremagog Sainte-Anne-de-Bellevue Saint-Anicet Île Rouge Pointe Claveau Pointe-des-Monts Pointe-Noire Île Bicquette Cap-Chat Montréal-Trudeau Int'l Airport
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Ice Conditions

Ice Forecasts

Issued 10:00 AM EDT 20 March 2018 Today Tonight and Wednesday

Ice Edge

Ice edge estimated from Nova Scotia near 4520N 6100W to 4510N 6005W
to 4530N 5810W to 4650N 5725W to Newfoundland near 4730N 5610W. Sea
ice north of the ice edge.

Ice Coverage

Ice free.


Warnings (In effect)

Gale warning in effect


Issued 03:00 AM ADT 21 March 2018

'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.


Technical Marine Synopsis

Issued 8:00 PM ADT 20 March 2018 Tonight and Wednesday At 8:00 p.m. ADT tonight ridge located west of the Marine District.
By 3:00 a.m. ADT Wednesday ridge located on a line
northwest-southeast over the Marine District.

At 3:00 a.m. ADT Wednesday warm front from low located southwest
of the Marine District.
By 8:00 p.m. ADT Wednesday warm front from low located on a line
east-west over the southern Marine District.

Marine Weather Statement

Issued 2:59 AM ADT 21 March 2018 A warm front associated with an approaching low pressure system will
move into the southern marine district today before tracking
northward on Thursday. Strong to gale force northeasterly winds north
of the trough will spread to most of the district by Thursday morning
and switch to strong to gale force southwesterly winds in its wake.

Current information including satellite-based ocean wind measurements
indicate that this warm front will track along the southern edge of
the slope waters today prior to moving northward. There remains some
uncertainty with the extact strength and track of the associated low
pressure system which is expected to enter the western marine
district Thursday afternoon. Should the low arrive more intense than
is currently forecast, storm force northeasterlies and
southwesterlies near this feature may develop over some western

Marine interests are also advised that gale warnings are in effect
for all marine waters except for Chaleur-Miscou - western half, and
Anticosti - northwestern half.

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