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Avalanche Forecast

Archived

Nov 25th, 2013–Nov 26th, 2013

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

Regions

Kananaskis.

Chinook conditions prevail again tomorrow.  Watch for strong winds and above seasonal temps.  Skiing is rather rugged at the moment.

Confidence

Good

Weather Forecast

Chinook conditions will prevail for a few more days.  Expect no new snow, warm temps and windy conditions.

Avalanche Summary

No new avalanche activity over the past 24hrs.

Snowpack Summary

Snowpack continues to settle under the more seasonal conditions.  Strong winds have created widespread windslabs in alpine terrain and isolated areas at treeline.  These slabs are overlying a weak facetted base that has been collapsing easily under a skiers weight.  In alpine locations, the 1027 crust can still be found 10-20cm of the ground.

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.