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Avalanche Forecast

Archived

Mar 9th, 2026–Mar 10th, 2026

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.
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.

Thanks to colder temperatures, conditions have stablized since a widespread avalanche cycle occurred on Sunday. While the natural avalanches have ceased, the potential for human triggering remains.

Confidence

Avalanche Summary

A widespread avalanche cycle on Sunday resulted in many avalanches, with only a few being reported today. The Sherbrook Lake area experienced a large cycle. Otherwise our observations are limited in Yoho and Kootenay today, but the Field area experienced a large cycle triggered by rain on Mt. Stephen and Mt Dennis.

Sunshine Village ski patrol reported windslabs today with several size 1.5-2 avalanches triggered by explosives.

Snowpack Summary

Sunday's 20-40 cm of snow was blown into windslabs by extreme winds, and fell as rain to almost 2000 m, causing a widespread avalanche cycle. Monday's temperature drop of 12 degrees has created a crust to 2000m with 5-10 cm of dry snow on the surface. Windslabs remain in the alpine, but they are less reactive due to the cold. Buried surface hoar (Jan 24) in Kootenay and Yoho is now buried close to 90 cm down and remains reactive.

Weather Summary

Our region is now under the influence of a NW flow, which should keep temperatures cool and precipitation steady through the week. Tuesday looks like around 5 cm, but expect another 20 cm by Wednesday and Thursday. Temperatures will remain cool (-10 to -15), and winds will be light to moderate through this period.

Terrain and Travel Advice

  • 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.