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Avalanche Forecast

Archived

Apr 1st, 2018–Apr 2nd, 2018

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.

Skier triggerable windslabs are being found in Alpine areas along wind affected features such as ridgelines and crossloaded slopes.  This is still a very winter snowpack.

Confidence

High -

Weather Forecast

Well.... Good news is its calling for a mix of sun and cloud with 5cm of snow overnight.  Bad news is temperatures are forecast to be around -20!!!  Brutal!  Feels more like february than April!

Avalanche Summary

No new avalanche activity was observed over the past 24hrs. 

Snowpack Summary

The recent storm snow the we received earlier in the week is settling and beginning to strengthen.  Isolated windslabs are being found in Alpine terrain along ridge crests and gullied features but do not extend far downslope.  On solar aspects there is a new thin melt freeze crust the developed on Saturday and then the deeper march 15th crust down closer to 50cm.  Field tests are showing no results on this crust so far but we are still cautious in bigger south facing terrain.  Dig down and evaluate this interface before committing to a feature.

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.