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Avalanche Forecast

Archived

Feb 27th, 2023–Feb 28th, 2023

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

Regions

Glacier.

The storm slab now buries a layer of facets and may remain reactive for a few days. Assess the snowpack before stepping into bigger terrain.

Excellent snow quality is found in sheltered areas.

Confidence

High

Avalanche Summary

A natural avalanche cycle occurred early Sunday morning up to size 3 and artillery avalanche control on Sunday produced results averaging size 2 and up to size 3.5.

Snowpack Summary

30cm of recent storm snow buries a thin layer of facets. Excellent snow quality is found in sheltered locations.

The consistent snowfall in Feb has helped strengthen and promote rounding of the mid and lower snowpack.

The deep persistent weakness at the base of the snowpack consists of rounding facets and a decomposing crust in some locations.

Weather Summary

A mix of sun and cloud for Tuesday with isolated flurries, an alpine high of -8 and light Southerly winds.

Another pulse of snow (~10cm) and increasing winds on Wednesday evening into Thursday morning.

Terrain and Travel Advice

  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.
  • Loose avalanches may start small but they can grow and push you into dangerous terrain.
  • Use appropriate sluff management techniques.

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.