Johnstone Strait


Marine Forecast

Issued 09:30 PM PST 10 December 2016

Tonight and Sunday

Gale warning in effect.

Wind southeast 10 to 15 knots except northeasterly outflow 30 to 40 near the mainland inlets.

Periods of snow or rain changing to chance of flurries or showers overnight and Sunday.

Temperatures near zero.

Extended Forecast

Issued 04:00 PM PST 10 December 2016
Monday Wind northeasterly outflow 35 to 45 knots.
Tuesday Wind northeasterly outflow 30 to 40 knots.
Wednesday Wind northeasterly outflow 20 to 30 knots.

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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 9:30 PM PST 10 December 2016

'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 9:30 PM PST 10 December 2016 Tonight and Sunday At 9:30 p.m. PST tonight intensifying ridge located over BC

At 9:30 p.m. PST tonight weakening low 1004 mb located 60 miles
south of Port Hardy.
By 10:00 p.m. PST Sunday dissipating low 1012 mb located off Tofino.

Marine Weather Statement

Issued 9:29 PM PST 10 December 2016 An Arctic ridge of high pressure will remain over the British
Columbia Interior and will build strongly over the northern and
Central Interior tonight and Sunday. Meanwhile, a weakening area of
low pressure will remain off the west coast of Vancouver Island.

The building Arctic high over the interior will cause intensifying
Arctic outflows over the northern and central portions of the coast.
Gale force outflow winds through the mainland inlets will strengthen
to storm force overnight or Sunday morning over the north and Central
Coast. Cold temperatures well below freezing will produce moderate
freezing spray through Douglas Channel and Portland Inlet.

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