Johnstone Strait Marine Forecast, Warnings and Alerts

Canada

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Johnstone Strait

Marine Forecast

Issued 10:30 AM PST 11 November 2025

Today Tonight and Wednesday.

Strong wind warning in effect.

Wind southeast 5 to 15 knots increasing to southeast 15 to 20 early this afternoon and to southeast 20 to 25 early this evening. Wind diminishing to southeast 15 to 20 near midnight. Wind southeast 15 to 20 Wednesday.

Showers ending overnight. Periods of rain Wednesday late in the day.

Winds

Issued 10:30 AM PST 11 November 2025

Today Tonight and Wednesday. Strong wind warning in effect. Wind southeast 5 to 15 knots increasing to southeast 15 to 20 early this afternoon and to southeast 20 to 25 early this evening. Wind diminishing to southeast 15 to 20 near midnight. Wind southeast 15 to 20 Wednesday.

Weather & Visibility

Issued 10:30 AM PST 11 November 2025

Today Tonight and Wednesday. Showers ending overnight. Periods of rain Wednesday late in the day.

There is no ice forecast issued for this area.

Warnings (In effect)

Strong wind warning in effect

Johnstone Strait

Issued 10:30 AM PST 11 November 2025

'Strong' winds of 20 to 33 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 10:30 AM PST 11 November 2025 Today Tonight and Wednesday At 10:30 a.m. PST today ridge located on a line northeast-southwest
over northern Vancouver Island.
By 1:00 a.m. PST Wednesday departing ridge located on a line
east-west over northern Haida Gwaii.

At 10:30 a.m. PST today deepening trough located southwest of the
offshore waters.
By 4:00 p.m. PST Wednesday deepening low located over central
Explorer.

Marine Weather Statement

Issued 10:24 AM PST 11 November 2025 A low pressure system will approach Explorer from the southwest
tonight, bringing northerly gales to North Explorer on Wednesday
morning. The northerly gales are expected to persist through the day
on Wednesday.

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