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Avalanche Forecast

Archived

Jan 23rd, 2025–Jan 24th, 2025

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Banff Yoho Kootenay, Banff, East Side 93N, Kootenay, Lake Louise, LLSA, Sunshine, West Side 93N, Field.

Lingering alpine wind slabs are the most likely threat to backcountry users.

Confidence

Moderate

Avalanche Summary

No new avalanches were observed or reported on Thursday. However, isolated, smaller wind slabs(size 1-1.5) have been reported in high alpine lees over the past few days.

Snowpack Summary

There has been widespread wind effect down into treeline in exposed areas.

Where the wind hasn't had an impact, the surface is a mix of facets and/ or sun crust, depending on your location. Below this, the mid-pack consists primarily of facets.

At the base of the snowpack lies a widespread, weak layer of depth hoar and a crust. It is dormant for now but should not be forgotten.

Snow depths at the treeline range from 60 to 100 cm.

Weather Summary

Winds NW 30-40kmh, no snow and -12 to 15C at treeline on Friday.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.