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Avalanche Forecast

Archived

Feb 24th, 2026–Feb 25th, 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 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.

Regions

Glacier.

Give the new snow time to bond before stepping into high consequence terrain. If triggered storm slabs in motion could trigger the deeper weak layers creating large destructive avalanches.

Human triggering of persistent slab avalanches at lower elevations remains possible.

Confidence

Moderate

  • We have a good understanding of the snowpack structure and confidence in the weather forecast.
  • We are confident that there are persistent slabs in the snowpack, but uncertain about how likely they are to trigger.

Avalanche Summary

New snow and wind on Monday triggered a natural avalanche cycle up to size 3 observed in the hwy corridor and backcountry. A field team easily ski cut several storm slabs size 1-1.5. Recent human triggered wind slab and persistent slab avalanches have been reported throughout the region on the MIN.

Last week numerous size 1 to 2 persistent slabs were triggered from low angle terrain at treeline and below. These were failing on surface hoar layers which are now around 1m deep.

Weather Summary

An intense storm arriving Wednesday night and lasting through to Friday morning is expected to bring 50-60 cm with extreme westerly winds.

Tonight Flurries, trace of new snow. Alp low -10°C. Moderate SW winds. Freezing level (FZL) 500m.

Wed Snow 13cm. High -8°C. Moderate - strong SW winds. FZL 1100m.

Thurs Snow 27cm. High -8°C. Extreme SW winds. FZL 1000m.

Fri Snow 13cm. High -6°C. Strong W winds. FZL 1200m.

Terrain and Travel Advice

  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.
  • As the storm slab problem worsens, the easy solution is to choose more conservative terrain.

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.