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Avalanche Forecast

Archived

Jan 26th, 2014–Jan 27th, 2014

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

Regions

Kananaskis.

The basal weak layers are giving low confidence in the snowpack. Although hard to trigger, any avalanche that is initiated could be large and destructive. Cooler temps should reduce the solar triggered avalanche activity, but keep an eye on this.

Confidence

Good

Weather Forecast

Sunny conditions expected Monday with temperatures near -9 degrees. Winds will be light to moderate from the North. No snow is expected.

Avalanche Summary

Nothing new.

Snowpack Summary

Surface hoar up to 15mm in sheltered areas below 2000m. Sun crust on solar aspects at all elevations. Variable wind slab at all elevations and all aspects except SW and W. Basal facets/depth hoar persist.

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.