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Avalanche Forecast

Archived

Feb 23rd, 2026–Feb 24th, 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 and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural and human triggered avalanches likely.

Regions

Glacier.

New snow and strong winds have formed reactive storm slabs in the alpine and treeline, these may trigger the deeper weak layers creating large destructive avalanches.

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

Confidence

Moderate

  • 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 in the hwy corridor and a field team easily ski cut several storm slabs size 1-2. Recently human triggered wind slab and persistent slab avalanches have been reported throughout the region on the MIN.

Over the past week numerous size 1 to 2 persistent slabs were triggered from low angle terrain at tree-line and below. These have been failing on surface hoar layers in the upper snowpack.

Snowpack Summary

Up to 30 cm of new snow fell on old surfaces of settled snow and wind affect and was redistributed by strong SW winds on Monday.

The Feb 9 surface hoar (SH) is down 60-90cm and remains reactive in snowpack tests, it sits on a crust on solar slopes.

The Jan 26th layer, composed of surface hoar/facets/crust, is buried 80-100cm deep. The largest surface hoar is preserved in sheltered areas below treeline.

Weather Summary

A brief lull on Tuesday before the next storm arrives, maybe as much as 50cm by the weekend.

Tonight: Flurries, trace of new snow. Alp low -11°C. Moderate SW winds. Freezing level (FZL) 500m.

Tues Sunny, no precip. High -10°C. Light gusting to moderate SW winds. FZL 800m.

Wed Snow 16cm. High -8°C. Extreme SW winds. FZL 800m.

Thurs Snow 18cm. High -7°C. Extreme SW winds. FZL 1000m.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Storm slabs in motion may step down to deeply buried weak layers and result in very large avalanches.
  • Surface hoar distribution is highly variable. Avoid generalizing your observations.

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.