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Avalanche Forecast

Archived

Jan 14th, 2015–Jan 15th, 2015

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

Regions

Jasper.

Warm temperatures will help settle the snowpack and make for easier travel conditions. Extreme winds on Friday will make exposed locations unpleasant.

Weather Forecast

Continued warm temperatures are expected for the next several days. Friday should bring some light snowfall combined with strong westerly winds.

Snowpack Summary

Warm temperatures are helping settle the snowpack and heal some of the facetting that has occurred over the past several weeks of cooler weather. The snowpack is highly variable throughout the region ranging from mostly weak, un-supportive facets in the south to a more settled snowpack that still supports skier travel further north.

Avalanche Summary

No new avalanches have been reported in the forecast zone.

Confidence

Intensity of incoming weather systems is uncertain on Friday

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.

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.