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Avalanche Forecast

Archived

Mar 6th, 2026–Mar 7th, 2026

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

Regions

Little Yoho, Kootenay.

Remain skeptical and curious about the persistent weak layer, which is deep enough to cause large avalanches if triggered. This will be a layer of concern for a while yet.

Confidence

Moderate

  • We are uncertain about how quickly persistent slabs are gaining strength.

Avalanche Summary

No new avalanches reported in past 48 hours.

Snowpack Summary

25-50 storm snow (from Feb 27) has been redistributed by strong SW/W winds, resulting in widespread scouring and some windslabs in the alpine. The Jan 24 persistent layer (surface hoar/crust/facet) is down 40-80 cm and producing variable results in the mod to hard range. This layer is most prominent and reactive at treeline and below, but concern for southerly aspects in the alpine also exists. We expect this problem to exist for the foreseeable future.

Weather Summary

Saturday: Cloudy with light flurries. Winds strong from the west. Freezing Levels near 2300m

Sunday: 10-20 cm of snow forecast by end of day Sunday. Strong winds from the West. Freezing levels near 2100m.

Terrain and Travel Advice

  • Be aware of the potential for remote triggering and large avalanches due to buried surface hoar.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.

Problems

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.

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.