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

Regions

Glacier.

Travel conditions are rugged below 1600m on a firm, refrozen crust from the weekend storm.

The last two avalanche cycles have cleaned out many start zones. However, there are still slopes and features that haven't flushed out the persistent slab problem.

See the Avalanche Canada blog post for info on persistent slab conditions.

Confidence

Moderate

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

Avalanche Summary

Natural avalanche activity has dropped off with the cooling.

Artillery control on Sunday produced numerous avalanches from size 2 to 4. Of note, avalanche character changed to wet/loose below treeline with the rain and warm temps.

See the Avalanche Canada blog post for info on dealing with persistent slab problems. We are entering the "healing' stage. Avalanches are becoming less likely but the consequence will remain massive for the foreseeable future.

Snowpack Summary

A widespread surface slab, 50-80cm in depth, blankets the region at Alpine and Treeline elevations. Below Treeline, the rain-soaked surface is now a firm crust with up to 10cm of new snow on top of it.

The Feb 9 and Jan 26 surface hoar (SH) layers are now buried 110-170cm deep. The Feb 9 SH sits over a crust on solar aspects. The Jan 26th layer is composed of very large surface hoar (up to 40mm), facets, and/or a crust.

Weather Summary

Cool temps and convective cells will bring flurries and gusty SW winds to the region.

Tonight Flurries, 5cm. Alpine low -14°C. Freezing level (FZL) Valley bottom. Winds SW 20-35km/h.

Tues Scattered flurries, 5cm. Alp High -12°C. Wind SW 25-50km/h. FZL 500m.

Wed Snow, 10cm. Alp High -10°C. Wind SW 30-60km/h. FZL 800m.

Thurs Flurries, 5-10cm. Alp High -9°C. Wind W 30-55km/h. FZL 700m.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected terrain.
  • If triggered, wind slabs may step down to deeper layers, causing larger avalanches.

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.