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Avalanche Forecast

Archived

Feb 24th, 2022–Feb 25th, 2022

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

Regions

Glacier.

The weather pattern and avalanche hazard will remain stable until Saturday, with a storm approaching the region on Sunday.

Weather Forecast

Continued warming trend, with an incoming storm on Sunday.

Tonight: Clear, -16*C, light W winds

Fri: Cloudy with sunny periods, Alp high -11*C, light SW winds

Sat: Clouds and Sun, Isolated Flurries, Alp high -11*C, light SW winds

Sun: Flurries, Alp high -11*C, Mod SW winds, Fz lvl 1500m

Snowpack Summary

Wind slabs formed early in the week are softening with cold temperatures. These lingering slabs, formed during strong northerly winds, can be found in open exposed terrain. The Feb 15 surface hoar/solar crust is down 50-70 cm. This layer is not been observed to be reactive in stability tests or to skier loads in the past few days.

Avalanche Summary

No new natural avalanches were observed on Wednesday and Thursday.

Early this week public reports of human triggered avalanches failing below surface wind slabs and on the Feb 15 SH/Crust layer. Size 2 partial burial on Avalanche Crest, Vaux Moraine, wind slabs on Cougar Creek East.

Confidence

The weather pattern is stable

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.