Johnstone Strait Marine Forecast, Warnings and Alerts

Canada

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Johnstone Strait

Marine Forecast

Issued 04:00 AM PDT 16 August 2026

Today Tonight and Monday.

Strong wind warning in effect.

Wind northwest 10 to 20 knots becoming northwest 15 to 25 this afternoon then diminishing to northwest 10 to 15 Monday morning. Wind increasing to northwest 15 to 25 Monday afternoon.

Periods of drizzle and fog banks changing to showers near noon and ending this evening with a risk of thunderstorms. Periods of drizzle overnight and Monday morning. Fog banks forming this evening and dissipating near noon Monday.

Winds

Issued 04:00 AM PDT 16 August 2026

Today Tonight and Monday. Strong wind warning in effect. Wind northwest 10 to 20 knots becoming northwest 15 to 25 this afternoon then diminishing to northwest 10 to 15 Monday morning. Wind increasing to northwest 15 to 25 Monday afternoon.

Weather & Visibility

Issued 04:00 AM PDT 16 August 2026

Today Tonight and Monday. Periods of drizzle and fog banks changing to showers near noon and ending this evening with a risk of thunderstorms. Periods of drizzle overnight and Monday morning. Fog banks forming this evening and dissipating near noon Monday.

There is no ice forecast issued for this area.

Warnings (In effect)

Strong wind warning in effect

Johnstone Strait

Issued 04:00 AM PDT 16 August 2026

'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.

Technical Marine Synopsis

Issued 4:00 AM PDT 16 August 2026 Today Tonight and Monday At 4:00 a.m. PDT today ridge located on a line north-south over
Bowie.
By 10:30 a.m. PDT Monday ridge located from Haida Gwaii to Explorer.

Marine Weather Statement

Issued 9:16 PM PDT 15 August 2026 A ridge of high pressure offshore is producing strong to gale force
westerly winds over eastern sections of Juan de Fuca Strait. The
winds will ease to moderate overnight.

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