Southwestern Grand Banks, Canada Marine Forecast, Warnings and Alerts

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Southwestern Grand Banks

Marine Forecast

Issued 10:00 AM NST 14 December 2025

Today Tonight and Monday.

Storm warning in effect.

Wind variable 15 knots increasing to east 15 to 20 this afternoon and to southwest 35 this evening except east 25 over northern sections tonight. Wind increasing to west 35 to 45 Monday afternoon and to west 45 to 55 Monday evening.

Showers changing to rain and fog banks near noon.

Winds

Issued 10:00 AM NST 14 December 2025

Today Tonight and Monday. Storm warning in effect. Wind variable 15 knots increasing to east 15 to 20 this afternoon and to southwest 35 this evening except east 25 over northern sections tonight. Wind increasing to west 35 to 45 Monday afternoon and to west 45 to 55 Monday evening.

Waves

Issued 06:00 AM NST 14 December 2025

Today Tonight and Monday. Seas 3 to 5 metres becoming 2 to 3 this afternoon except 4 to 6 over southern sections overnight and Monday morning. Seas building to 4 to 6 Monday morning and to 6 to 8 Monday evening.

Weather & Visibility

Issued 10:00 AM NST 14 December 2025

Today Tonight and Monday. Showers changing to rain and fog banks near noon.

Ice Forecasts

Southwestern Grand Banks

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

Ice Edge

Ice edge estimated from Newfoundland near 4934N 5429W to 4941N 5429W
to 5018N 5539W to 5117N 5503W to 5341N 5526W to 5633N 6011W to 5928N
6239W to Labrador near 6018N 6424W. Sea ice west of the ice edge.

Ice Coverage

Ice free.

Ice Forecasts

Tail of the Grand Banks

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

Ice Edge

Ice Coverage

Forecasts available to mariners upon request.

Iceberg Bulletin

Southwestern Grand Banks

Issued 1:30 PM EST 14 December 2025

Iceberg Limit

Iceberg limit at 0000 UTC 15 Dec estimated from Newfoundland near
4730N 5239W to 4715N 4945W to 5115N 4745W to 5945N 5730W to 6155N
5330W to 6005N 4945W to 5900N 4600W then northeastward.

Iceberg Count

No confirmed icebergs.

Iceberg Bulletin

Tail of the Grand Banks

Issued 1:30 PM EST 14 December 2025

Iceberg Limit

Iceberg limit at 0000 UTC 15 Dec estimated from Newfoundland near
4730N 5239W to 4715N 4945W to 5115N 4745W to 5945N 5730W to 6155N
5330W to 6005N 4945W to 5900N 4600W then northeastward.

Iceberg Count

Forecasts available to mariners upon request.

Warnings (In effect)

Storm warning in effect

Southwestern Grand Banks

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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