Southwest Coast, Canada Marine Forecast, Warnings and Alerts

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Southwest Coast

Marine Forecast

Issued 10:00 AM NST 14 December 2025

Today Tonight and Monday.

Storm warning in effect.

Wind west 25 knots diminishing to variable 10 to 15 near noon then increasing to southeast 15 to 20 this afternoon. Wind backing to east 25 near midnight then increasing to northeast 35 to 45 late overnight. Wind becoming southwest 35 to 45 near noon Monday then increasing to northwest 45 to 55 Monday afternoon.

Snow or rain this afternoon tonight and Monday. Visibility 1 mile or less in precipitation.

Winds

Issued 10:00 AM NST 14 December 2025

Today Tonight and Monday. Storm warning in effect. Wind west 25 knots diminishing to variable 10 to 15 near noon then increasing to southeast 15 to 20 this afternoon. Wind backing to east 25 near midnight then increasing to northeast 35 to 45 late overnight. Wind becoming southwest 35 to 45 near noon Monday then increasing to northwest 45 to 55 Monday afternoon.

Waves

Issued 06:00 AM NST 14 December 2025

Today Tonight and Monday. Seas 2 to 3 metres subsiding to 1 to 2 this afternoon then building to 2 to 3 late overnight. Seas building to 3 to 5 near noon Monday and to 6 to 8 Monday evening.

Weather & Visibility

Issued 10:00 AM NST 14 December 2025

Today Tonight and Monday. Snow or rain this afternoon tonight and Monday. Visibility 1 mile or less in precipitation.

Ice Forecasts

Issued 10:00 AM EST 14 December 2025 Today Tonight and Monday

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 13 December 2025

Iceberg Limit

Iceberg limit at 0000 UTC 14 Dec estimated from Newfoundland near
4730N 5239W to 4730N 5000W to 5130N 4815W to 5945N 5730W to 6155N
5330W to 6005N 4945W to 5900N 4600W then northeastward.

Iceberg Count

No confirmed icebergs.

Warnings (In effect)

Storm warning in effect

Southwest Coast

Issued 10:00 AM NST 14 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.

Technical Marine Synopsis

Issued 10:00 AM NST 14 December 2025 Today Tonight and Monday At 10:00 a.m. NST today low 964 mb located southeast of Greenland.
By 8:00 p.m. NST tonight departing low 961 mb located southeast
of Greenland.

At 8:00 p.m. NST tonight deepening low 996 mb located south of
Nova Scotia.
By 8:00 p.m. NST Monday low 955 mb located over northeastern
Newfoundland.

At 10:00 a.m. NST today ridge located on a line northwest-southeast
over Cabot Strait.
By 3:00 a.m. NST Monday dissipating ridge located on a line
northwest-southeast over Belle Isle Bank.

Marine Weather Statement

Issued 9:51 AM NST 14 December 2025 An intense low pressure system southeast of Greenland will continue
eastward today and depart this evening. Strong to gale force westerly
winds over eastern waters will diminish through the day as the low
pulls away.

Meanwhile, a second intensifying low pressure system will approach
the marine district tonight to lie over Northeastern Newfoundland by
Monday evening. Gale force southwesterly winds will develop over the
Southern Grand Banks this evening. Gale to storm force easterly to
northerly winds will develop north of the low on Monday. Winds over
all waters will then shift to gale to storm force southwest to
northwesterlies as the low tracks over Newfoundland Monday evening.

Marine interests are advised that storm warnings are in effect for
Southwest Coast, South Coast, East Coast - Cape St. Francis and
south, Northeast Coast, Belle Isle Bank and the Grand Banks.
Gale warnings are in effect for all remaining waters.

Marine interests are also advised that freezing spray warnings are in
effect for Strait of Belle Isle, Gulf waters, Northeast Coast, and
Belle Isle Bank.

Marine interests are further advised that water levels are expected
to exceed the highest astronomical tide with high waves and pounding
surf, impacting some coastal areas of Northeast Coast and East Coast
Monday night into Tuesday morning, most significant near high tide.

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