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Avalanche Forecast

Archived

Jan 21st, 2025–Jan 22nd, 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.

Conditions remain mostly unchanged and the snowpack is static due to an absence of inputs and cold temperatures.

Small windslabs exist in isolated alpine locations, so watch for these if venturing into wind affected alpine terrain.

Confidence

Moderate

Avalanche Summary

Sunshine reported a couple small windslabs in the alpine but less reactive than yesterday. Otherwise, no new avalanches observed by the field team in the Little Yoho area.

Snowpack Summary

The surface is a mix of facets, wind effect and/ or sun crust depending on your location. Below this, the mid-pack consists of more facets which sit over the October crust and depth hoar at the bottom. Snow depths at treeline range from 60-100 cm.

Weather Summary

Cold, dry with intermittently strong westerly winds is the theme for the next few days:

Wednesday will be sunny with light to moderate winds.

Thursday will bring moderate to strong west winds and a few centimetres new snow.

Friday will by sunny again with moderate NW ridgetop winds.

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.