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Avalanche Forecast

Archived

Feb 25th, 2014–Feb 26th, 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.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Jasper.

Great skiing can be found in sheltered areas. A weak sun crust will be found on true solar aspects. Be aware, there is a significant temperature inversion in place and it could be considerably warmer on any overhead slopes. 

Weather Forecast

If it won't snow we might as well keep the stunning forecast we are expecting! Wednesday is expected to be the warmest day as temperatures are expected to reach to -12 degrees with little wind. Be aware that the valley bottom temperatures are considerably colder than upper elevation temperatures with the continued strong temperature inversion.

Snowpack Summary

Anywhere from 30cm to 45cm depending on loading aspect over a combo facet-decomposing surface hoar layer. This is most prevalent at tree line and into the lower elevations. Below tree line there is a supportive yet shallow mid-pack over facets-depth hoar. Alpine is a variety of layers but generally all well bridged.

Avalanche Summary

No new natural avalanches were observed or reported. Visibility was excellent under blue skies.

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.