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Avalanche Forecast

Archived

Jan 22nd, 2014–Jan 23rd, 2014

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

Regions

Kananaskis.

Watch for decreases in stability on solar aspects when the sun comes out.  A spring like problem in January...  Thin areas are the likely trigger spots so be sure to avoid or make efforts to avoid these areas.

Confidence

Fair - Freezing levels are uncertain on Thursday

Weather Forecast

No new snow is expected over the next 24hrs and temperatures are supposed to be warm.  With clear skies and warm temps, stability will likely deteriorate on solar aspects as the day warms up. 

Avalanche Summary

No new natural avalache activity over the past 24hrs.

Snowpack Summary

Not much of a change out there these days.  Melt freeze crusts on solar aspects up to 2400m.  Otherwise, the snowpack is generally wind affected in most open terrain and overlying a weak facetted base.  Moderate sheers persist at the interface of the weak base to the upper snowpack.  Generally ski quality is poor.

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.