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Avalanche Forecast

Archived

Apr 10th, 2014–Apr 11th, 2014

Alpine
Natural avalanches possible, human triggered probable.
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.

Enjoy the spring weather for another day. Saturday will see a slight cooling trend with a bit of new snow.

Confidence

Good

Weather Forecast

Alpine winds will peak tonight and drop to 65km/hr at 3000m by tomorrow morning. Not a lot of temperature fluctuation overnight. Freezing level will drop to 1200m tonight and rise to almost 1900m tomorrow. Cloudy periods will bring a few flurries, but nothing significant will come of them.  A cooling trend for the week-end will bring some light snow to the area.

Avalanche Summary

Nothing new

Snowpack Summary

Cool alpine temps have kept the snow cold and dry today. The winds have also kept up their pace, blowing the snow from west to east. Windslabs in the alpine are inevitable given the recent wind pattern. East and South East are the areas to find them. Treeline winds have been considerably less powerful. Any solar aspect at treeline and below will have felt the heat by now. Today saw no solar avalanche activity, so the heat only had a stabilizing effect on the snow. Valley bottom highs of 5 degrees have left crusts up to treeline on south aspects. The winds kept it cool enough to avoid any new temperature crusts.

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.