Johnstone Strait


Marine Forecast

Issued 04:00 PM PST 12 December 2018

Tonight and Thursday.

Gale warning in effect.

Wind southeast 30 to 40 knots diminishing to southeast 5 to 15 late overnight then increasing to southeast 15 to 25 Thursday afternoon. Wind increasing to southeast 30 to 40 Thursday evening.


Extended Forecast

Issued 04:00 PM PST 12 December 2018
Friday Wind southeast 35 knots diminishing to southeast 25 late in the day.
Saturday Wind southwest 15 knots increasing to southeast 40.
Sunday Wind southeast 40 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)

Gale warning in effect

Johnstone Strait

Issued 7:29 PM PST 12 December 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 4:00 PM PST 12 December 2018 Tonight and Thursday At 4:00 p.m. PST today frontal system located on a line
northeast-southwest over Queen Charlotte Sound.
By 4:00 a.m. PST Thursday dissipating frontal system located on
a line northeast-southwest over the Lower Mainland.

At 4:00 p.m. PST today low 970 mb located northwest of Bowie.
By 4:00 a.m. PST Thursday low 976 mb located near the Alaska

At 4:00 p.m. PST Thursday approaching low 987 mb located southwest
of Explorer.

Marine Weather Statement

Issued 3:55 PM PST 12 December 2018 A frontal system over the Queen Charlotte Sound will move southward
to the Vancouver Island this evening then to the Lower Mainland
overnight. The system will dissipate Thursday morning. The Parent
Low of this front over northwest of Bowie will track northeastward
To the Alaska Panhandle by Thursday morning. Another low will
approach the southern waters Thursday night.

Strong to gale force southeasterly winds will prevail over inner
South Coast waters tonight as the front advances southward. Gale to
storm force westerly winds will continue over central and northern
waters tonight in wake of the front and at the south of the Parent
low. Gale to storm force westerlies will persist over northern
Waters on Thursday but the winds over central waters will become
moderate to strong westerlies as the low continues to move
northeastward. As the second low approaches later on Thursday, gale
force southerly winds will develop over most southern waters and
Gale force easterly or northeasterly winds will develop over most
central waters Thursday night.

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