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Avalanche Forecast

Archived

Jan 19th, 2025–Jan 20th, 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, human triggered possible.
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.

The deep persistent problem has been removed from the forecast region due to the absence of recent avalanche activity. However, the layer remains in the snowpack and could re-emerge as a concern in the future. Wind could increase Tuesday in the high alpine.

Confidence

Moderate

Avalanche Summary

No avalanches were observed or reported today.

Snowpack Summary

Wind slabs remain on lee slopes in the alpine and at treeline. At treeline, the mid-pack consists of facets over the October crust and depth hoar at the bottom. Snow depths at treeline range from 60-100 cm.

Weather Summary

Generally clear weather is expected on Monday, with slightly warmer temperatures. Valley temperatures will be around -9°C, and ridge temperatures near -15°C. Winds at 3000m may increase into the strong range from the NW.

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.