Johnstone Strait


Marine Forecast

Issued 09:30 PM PDT 21 March 2019

Tonight and Friday.

Strong wind warning in effect.

Wind light increasing to southeast 10 to 15 knots early Friday morning and to southeast 15 to 25 late Friday morning. Wind becoming southeast 20 to 30 Friday afternoon then diminishing to southeast 15 early Friday evening.

Showers late overnight and Friday late in the day.

Extended Forecast

Issued 04:00 PM PDT 21 March 2019
Saturday Wind southeast 5 to 15 knots.
Sunday Wind light.
Monday Wind southeast 5 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 21 March 2019

'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 21 March 2019 Tonight and Friday At 9:30 p.m. PDT tonight frontal system located off Bowie.
By 9:00 a.m. PDT Friday weakening frontal system located over Bowie.

At 8:00 a.m. PDT Friday low located over central Explorer.
By 8:00 p.m. PDT Friday intensifying low located near Cape
St. James.

Marine Weather Statement

Issued 9:09 PM PDT 21 March 2019 A frontal system west of Bowie will track slowly eastward overnight.
Ahead of the front, strong to gale force southeasterlies over the
northern and central waters will prevail tonight.

An intensifying trough of low pressure will track across Explorer on
Friday and lie over Queen Charlotte Sound by Friday evening with an
associated low pressure centre which will head for Cape St James.
Ahead of the trough, southeasterly gales will develop across Explorer
overnight and spread to the west coast of Vancouver Island Friday
morning. As the trough moves northward, southeasterly winds will
Rise quickly to gale force over central waters and northern waters
late Friday. Winds will shift to strong to gale force southwesterly
in the wake of the trough.

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