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Avalanche Forecast

Archived

Feb 7th, 2014–Feb 8th, 2014

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

Regions

Kananaskis.

Until we see a change in the current weather pattern the primary concern out there is still the deep basal weaknesses that is most susceptible to human triggering in steep alpine features, mainly on northerly aspects.

Confidence

Good - The weather pattern is stable

Weather Forecast

No new precipitation in the forecast .  Temperatures gradually rising with a return to more normal values expected by next Tuesday.  WInds along ridgetops are trending from the N-NE eventually transitioning to a more westerly flow in the days to come.

Avalanche Summary

No new observed or reported.

Snowpack Summary

No change - surface facetting taking place. Sun crusts are still present at all elevations on solar exposed aspects. Terrain in the alpine and treeline elevation zones are highly variable with regards to snow cover and condition but wind slabs definitely dominate the landscape. The deep basal weaknesses remain in place and in fact is weakening gradually under the influence of the continued cold temperatures.

Problems

Deep Persistent Slabs

Deep Persistent Slab avalanches are the release of a thick cohesive layer of hard snow (a slab), when the bond breaks between the slab and an underlying persistent weak layer deep in the snowpack. The most common persistent weak layers involved in deep, persistent slabs are depth hoar or facets surrounding a deeply buried crust. Deep Persistent Slabs are typically hard to trigger, are very destructive and dangerous due to the large mass of snow involved, and can persist for months once developed. They are often triggered from areas where the snow is shallow and weak, and are particularly difficult to forecast for and manage.