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Avalanche Forecast

Archived

Feb 25th, 2026–Feb 26th, 2026

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

Regions

Glacier.

Natural avalanches are likely and human triggered avalanches are very likely.

Use conservative route selection. Choose simple, low angle terrain with no overhead hazard.

Confidence

High

  • We are confident the likelihood of avalanches will increase with the forecast weather.

Avalanche Summary

On Thursday, natural avalanches will be likely and human triggered avalanches will be very likely. Avalanches triggered in the storm snow could step down to persistent weak layers. Large avalanches, bigger than size 3, are expected.

On Wednesday, field teams triggered small avalanches on a steep north aspects below treeline.

On Tuesday, riders were triggering size 1 avalanches down 80 cm on a persistent weak layer MINs and seeing signs of instability MIN.

Snowpack Summary

Storm slabs will build rapidly on Thursday with forecasted extreme winds and snowfall.

The incoming storm will further bury persistent weak layers and load them rapidly.

The Feb 9 surface hoar (SH) is down 80-110 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 120-140 cm. The largest surface hoar is preserved in sheltered areas below treeline.

Weather Summary

An intense storm starting Wednesday night and continuing to Friday is expected to bring ~40-60 cm of snow with extreme westerly winds.

Tonight Flurries, 10-15 cm. Alp low -9°C. Winds SW 55-70 km/h. Freezing level (FZL) 800m.

Thurs Snow 20-30 cm. High -8°C. Winds W 55, gusting to 90 km/h. FZL 900m.

Fri Flurries 5-10 cm. High -6°C. Winds W 25, gusting to 50 km/h. FZL 900m.

Sat Cloud/Sun High -8°C. Winds Light. FZL 1100m.

Terrain and Travel Advice

  • Any travel under High danger should exclusively be in flat or gentle terrain, far away from any overhead hazard.
  • 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.