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Avalanche Forecast

Archived

Feb 24th, 2014–Feb 25th, 2014

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

Regions

Kananaskis.

The skiing is great, but don't let sunny skies lure you into big terrain features. The Feb 10th layer needs time to heal and cautious route selection remains a necessity. This is not the time to ski a big line.

Confidence

Good

Weather Forecast

Tuesday will start off cold but then improve to -9 degrees at ridgetop. Winds should be light and skies are expected to be sunny. No precipitation is expected for the next few days.

Avalanche Summary

Several loose dry up to size 1.0 were observed in steep Alpine terrain on all aspects. Several avalanches have occurred in the last 12 to 48hrs associated with the Feb 10th layer. These occurred primarily in Alpine terrain, but have been observed on all aspects. Most slabs were between 60 and 80cm thick with some approaching 100cm thick. Some of these avalanches ran close to their full path.

Snowpack Summary

Surface faceting. Variable wind effect Alpine and Treeline. The Feb 10th layer down an average of 60 to 80cm. Natural avalanche activity is declining, but human triggering remains touchy. Isolated whumpfing and cracking continues.

Problems

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.