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Johnstone Strait


Marine Forecast

Issued 09:30 PM PDT 20 September 2021

Tonight and Tuesday.

Strong wind warning in effect.

Wind southeast 15 to 25 knots becoming southeast 10 to 20 near noon Tuesday.

Rain ending Tuesday morning. Showers Tuesday.

Extended Forecast

Issued 04:00 PM PDT 20 September 2021
Wednesday Wind light becoming northwest 10 to 15 knots in the morning.
Thursday Wind light.
Friday Wind northwest 10 to 15 knots.

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Weather Conditions

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Ice Conditions

There is no ice forecast issued for this area.


Warnings (In effect)

Strong wind warning in effect

Johnstone Strait

Issued 9:30 PM PDT 20 September 2021

'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 9:30 PM PDT 20 September 2021 Tonight and Tuesday At 9:30 p.m. PDT tonight frontal system located over Hecate Strait.
By 4:00 a.m. PDT Tuesday frontal system located on a line
northeast-southwest over the Central Coast.

At 4:00 p.m. PDT Tuesday weakening frontal system located on a
line northeast-southwest over Cape Scott.

Marine Weather Statement

Issued 9:08 PM PDT 20 September 2021 A frontal system over Hecate Strait will progress to central waters
this evening, then reach the northern tip of Northern Vancouver
Island Tuesday afternoon. The front will significantly weaken on
Tuesday and dissipate across the South Coast.

Gale to storm force southeast winds are occurring along the front
over northern and central waters. In the wake of the front, the winds
will shift to strong to gale force southwesterlies. Later on Tuesday
behind the front, winds will shift to moderate northwesterlies.

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