Avalanche Forecast

Issued: Feb 20th, 2025 4:00PM

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

Avalanche Canada Avalanche Canada, Avalanche Canada

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The wind is forecast to pick up and the temperature continues to rise. Watch for persistent slabs to become more reactive.

Summary

Confidence

Moderate

Avalanche Summary

There have been numerous, small to large (size 1 to 2) dry and wet loose avalanches, both natural- and rider-triggered running in steep terrain over the past few days.

On Tuesday there were two reports of size 1.5 skier and snowmobile triggered persistent slab avalanches on a southeast and northwest aspects in the alpine. See details in this MIN here as well as this MIN here.

Snowpack Summary

20 to 30 cm of recent snow is sitting on 30 to 60 cm of faceted old snow. Below this is a persistent weak layer consisting of facets and surface hoar buried in late January.

The mid and lower snowpack is generally well settled, with no other layers of concern.

Weather Summary

Thursday Night

Cloudy with 0 to 1 cm of snow. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -6 °C.

Friday

Mainly cloudy. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Saturday

Mostly cloudy with 5-10 cm of snow. 30 to 60 km/h southwest ridgetop wind. Treeline temperature -1 °C.

Sunday

Mostly cloudy with 15 to 25 cm of snow. 30 to 60 km/h southwest ridgetop wind. Treeline temperature 0 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Fresh snow rests on a problematic persistent slab, don't let good riding lure you into complacency.
  • Pay attention to the wind; once it starts to blow, sensitive wind slabs are likely to form.
  • Loose avalanches may step down to deeper layers, resulting in larger avalanches.
  • Make observations and continually assess conditions as you travel.

Problems

Persistent Slabs

An icon showing Persistent Slabs

The late January weak layer is a problem where the snow above it is stiff and slabby. Read more about it in our Blog.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible

Expected Size

1.5 - 2.5

Wind Slabs

An icon showing Wind Slabs

Expect wind slabs to form in alpine tree line lee terrain as the wind picks up through the day.

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

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

1 - 2

Valid until: Feb 21st, 2025 4:00PM

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