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Avalanche Forecast

Archived

Nov 30th, 2016–Dec 1st, 2016

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

Regions

Jasper.

Winds have remained light leaving the powder mostly intact. Monitor Friday's winds and rapid snow transport where it has to potential to tip the scales overloading the weak facets around the buried crust.

Weather Forecast

Temperatures will range from -5 to -12 the next few days. Thursday's winds will remain light SW and no precipitation expected. Friday may bring 5-10cm and increasing moderate SW winds and more snow and winds on Saturday.

Snowpack Summary

Last weekends 30cm of storm snow has formed soft slabs in isolated lee features. It rests on a buried crust found 2100-2600m down 40-60cm on all aspects. It will be a layer of concern as the snow load increases. In many areas the storm snow remains unaffected by the wind and offers good skiing.

Avalanche Summary

Explosive control on Parkers slabs at 2100m NE aspect released only one size 2 and a few size 1's. A couple of natural size 2 slabs were noted in the alpine at 2500m on isolated steep rocky terrain features.

Confidence

Wind speed and direction is uncertain on Friday

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.