Johnstone Strait


Marine Forecast

Issued 10:30 AM PST 09 December 2018

Today Tonight and Monday.

Gale warning in effect.

Wind southeast 25 to 35 knots diminishing to southeast 15 to 25 this afternoon and to southeast 5 to 15 early this evening. Wind becoming light late this evening then increasing to southeast 10 to 20 early Monday morning. Wind increasing to southeast 25 to 35 Monday afternoon and to southeast 35 to 45 Monday evening.

Rain ending late overnight. Rain beginning Monday afternoon.

Extended Forecast

Issued 04:00 AM PST 09 December 2018
Tuesday Wind southeast 35 to 45 knots diminishing to southeast 15 to 25 in the afternoon and to northwest 10 to 15 late in the day.
Wednesday Wind northwest 20 to 30 knots increasing to south 30 to 40 late in the day.
Thursday Wind south 25 knots increasing to south 30 to 40.

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Weather Conditions

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Map of Pacific - Georgia Basin marine weather areas Sentry Shoal - 46131 Halibut Bank - 46146 La Perouse Bank - 46206 Discovery Island Esquimalt Harbour Kelp Reefs Malahat Race Rocks Lightstation Saturna Island Sheringham Point University of Victoria Victoria Gonzales Victoria Int'l Airport Ballenas Islands Campbell River Airport Comox Airport Entrance Island Fanny Island Nanaimo Airport Sisters Islets Estevan Point Port Alberni Tofino Airport Grief Point Howe Sound - Pam Rocks Powell River Airport Sechelt Squamish Airport Point Atkinson Sand Heads Lightstation Tsawwassen Ferry Terminal Vancouver Int'l Airport Vancouver Harbour West Vancouver
Ice Conditions

There is no ice forecast issued for this area.


Warnings (In effect)

Gale warning in effect

Johnstone Strait

Issued 11:26 AM PST 09 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 10:30 AM PST 9 December 2018 Today Tonight and Monday At 10:30 a.m. PST today ridge located over BC interior.
By 4:00 p.m. PST today weakening ridge located over BC interior.

At 10:30 a.m. PST today frontal system located from the North
Coast to Vancouver Island.
By 4:00 p.m. PST today weakening frontal system located on a line
northwest-southeast over the South Coast.

At 4:00 a.m. PST Monday frontal system located west of the offshore
By 4:00 p.m. PST Monday frontal system located west of Haida Gwaii.

Marine Weather Statement

Issued 10:37 AM PST 9 December 2018 A ridge of high pressure over the BC Interior will weaken this
afternoon. A frontal system will move through the Central Coast
midday and then pass through the South Coast this afternoon then
dissipate. Another intense frontal system will approach the offshore
waters Monday morning. The system will move eastward and lie north
To south from the Alaskan Panhandle to Southern Explorer by Monday

Gale to storm force southeasterly winds will ease by early this
afternoon over the north and Central Coast waters then ease later
this afternoon for the South Coast waters. Winds will become strong
to marginal gale force westerlies in the wake of the front. Gale to
storm force southerly winds will develop again on Monday over most BC
waters as the next system crosses the offshore waters.

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