Avalanche Forecast

Issued: Jan 17th, 2025 4:00PM

The alpine rating is low, the treeline rating is low, and the below treeline rating is low. Known problems include Wind Slabs.

Avalanche Canada Avalanche Canada, Avalanche Canada

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Assess for wind slab as you move through terrain.

Lingering wind slabs may remain reactive to human-triggering in isolated locations below alpine ridgetops.

Summary

Confidence

Moderate

Avalanche Summary

No new avalanches were reported on Thursday.

Evidence of a natural loose wet avalanche cycle from Wednesday is still visible. These avalanches were triggered by above 0°C temperatures in the alpine and solar radiation. Avalanche activity has subsided with colder temperatures.

Snowpack Summary

A few centimeters of faceting snow covers a melt-freeze crust on all aspects at all elevations. Except on northerly aspects above 1900 m, where soft snow may still be found.

A weak layer of surface hoar or facets is found 10 to 30 cm deep. This layer remains a concern where wind slabs have formed above it. This layer is active in snow pit tests north of the Sea to Sky highway.

An otherwise right-side-up snowpack appears to be bonding well to a crust buried 70 to 100 cm deep. The mid and lower snowpack is generally well-settled and bonded with no layers of concern.

Weather Summary

Friday Night

Clear skies. 25 to 45 km/h northwest ridgetop wind. Treeline temperature -12 °C.

Saturday

Mostly sunny. 15 to 30 km/h northwest ridgetop wind. Treeline temperature -8 °C.

Sunday

Sunny. 25 to 50 km/h north ridgetop wind. Treeline temperature -8 °C.

Monday

Mostly sunny. 15 to 30 km/h west ridgetop wind. Treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Wind slabs are isolated, but may remain reactive.
  • The snowpack is generally stable; it may be appropriate to step out into more complex terrain.
  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.
  • A hard crust on the snow surface will help strengthen the snowpack, but may cause tough travel conditions.

Problems

Wind Slabs

An icon showing Wind Slabs

Isolated wind slabs remain a concern where they overlie a weak layer of facets or surface hoar and could still be reactive to human triggering. This issue seems to be most prominent in the Brandywine area.

Aspects: North, North East, East, South East, South.

Elevations: Alpine.

Likelihood

Possible

Expected Size

1 - 1.5

Valid until: Jan 18th, 2025 4:00PM

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