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Avalanche Forecast

Archived

Feb 28th, 2026–Mar 1st, 2026

Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
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

Glacier.

Recent storm snow has overloaded the persistant weak layer casuing a large avalanche cycle. Avoid avalanche terrain and overhead hazard.

Please read the Mountain Conditions Report for a detailed avalanche summary.

Confidence

Avalanche Summary

Natural avalanche activity up to size 2.5 obsevered in the highway corridor or Saturday.

On Friday, numerous natural avalanches up to size 4 running into valley bottom. Avalanche control work on Friday night continued to produce large avalanches up to size 3.5.

See the following link to an Mountain Conditions Report. Also, look at this MIN.

Snowpack Summary

A recent storm delivered approx. 70 cm of new snow with extreme southerly wind creating strom slabs.

The Feb 9 surface hoar (SH) is down 90-120 cm and remains reactive in snowpack testing. The Feb 9 SH sits over a crust on solar aspects.

The Jan 26th layer, composed of surface hoar/facets/crust, is buried down 130-160 cm. The largest surface hoar is preserved in sheltered areas below treeline.

Weather Summary

Partial Sun on the weekend with another storm arriving Tuesday.

Tonight No precipitation, Wind SW 15-30km/h. Low -9°C. Wind West 25-70 km/h. Freezing level (FZL) valley bottom.

Sun - A mix of sun and cloud. High -3°C. SW wind 20 gusting 45km/hr. FZL 1500m.

Mon - Cloudy w/ sunny periods. High -2°C. Winds SW 20 gusting to 50km/hr. FZL 1700m.

Tues Snow, 14cm. High -3. Wind SW 25 gusting to 60.

Terrain and Travel Advice

  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.
  • Be aware of the potential for large avalanches due to buried surface hoar.
  • Shooting cracks, whumpfs, and recent avalanches are strong indicators of an unstable snowpack.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.