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Avalanche Forecast

Archived

Mar 7th, 2026–Mar 8th, 2026

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

Regions

Little Yoho, Kootenay.

Minimize overhead hazard and make conservative terrain choices on Sunday.

A warm, wet storm is moving through the region starting tonight. 15-30 cm of snow with strong to extreme W winds will bump the danger rating to HIGH in the alpine & CONSIDERABLE at treeline. This new load may also make the buried persistent layers more reactive.

Confidence

Moderate

  • We are uncertain due to the timing, track, and intensity of the incoming weather system.

Avalanche Summary

No new avalanches were reported in these regions on Saturday, but visibility was limited.

Local ski areas were able to ski cut small wind slabs in the immediate lee areas of the alpine and treeline.

Moist snow reported below 1900 m.

Snowpack Summary

Scouring, wind effect and some small wind slabs exist in the alpine. The Jan 24 persistent layer (surface hoar/crust/facet) is down 40-80 cm and remains reactive, producing variable results in the mod to hard range. This layer is most prominent 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

Sunday: Forecasts snow amounts vary with 10-35 cm of snow by the end of the day, with the larger amounts expected along the divide. Strong winds from the West continue through most of the day. Freezing levels stay near 2000 m Saturday night, and begin lowering through the day on Sunday.

Monday: Freezing levels drop to valley bottom, winds become light, and snow flurries with a mix of sun and cloud are expected.

Terrain and Travel Advice

  • Carefully manage your exposure to overhead hazards.
  • Stay off recently wind loaded slopes until they have had a chance to stabilize.
  • Be aware of the potential for remote triggering and large avalanches due to buried surface hoar.

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.

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.