Johnstone Strait


Marine Forecast

Issued 10:30 AM PST 17 February 2018

Today Tonight and Sunday.

Gale warning in effect.

Wind southeast 25 to 35 knots becoming northwest 20 to 30 near noon then becoming northwest 25 to 35 near midnight. Wind northwest 25 to 35 Sunday.

Periods of rain and wet snow ending late overnight. Visibility 1 mile or less in precipitation.

Extended Forecast

Issued 04:00 AM PST 17 February 2018
Monday Wind northeasterly outflow 15 to 25 knots diminishing to light in the afternoon.
Tuesday Wind east 5 to 15 knots becoming light late in the day.
Wednesday Wind southeast 5 to 15 knots becoming light late in the day.

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Weather Conditions

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Ice Conditions

There is no ice forecast issued for this area.


Warnings (In effect)

Gale warning in effect

Johnstone Strait

Issued 10:30 AM PST 17 February 2018

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. 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 17 February 2018 Today Tonight and Sunday At 10:30 a.m. PST today low located over central Vancouver Island.
By noon PST today low located near Victoria.

At 10:30 a.m. PST today deepening trough located over the Mainland

At 10:30 a.m. PST today building ridge located over BC interior.

Marine Weather Statement

Issued 10:01 AM PST 17 February 2018 An area of low pressure will continue across Vancouver Island this
morning, coming to rest near Victoria by midday. A trough of low
pressure will deepen along the entire mainland coast through the day
while high pressure builds over the BC Interior.

Gale force southeasterly winds ahead of the advancing low will give
way to prolonged gale to storm force northerly winds for the majority
of outer coastal waters. Gale force outflow winds will also be a
factor near mainland inlets. These winds will continue well into
Sunday before beginning to ease.

With the prolonged northerly winds offshore, waves reaching 9 metres
are expected for offshore waters west of Vancouver Island on Sunday.

A risk of freezing spray will exist through Douglas Channel tonight
and Sunday as Arctic air floods out of the BC Interior and
temperatures plummet.

Pacific - South Coast Area

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