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Avalanche Forecast

Archived

Dec 28th, 2012–Dec 29th, 2012

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

Regions

Little Yoho.

Mainly stable conditions, especially W of the divide in deeper snowpack areas.  East of the Divide, more variability exists in thinner snowpack areas. SH

Weather Forecast

Light N to NW winds and a stable, clearing trend for the next 3 days.  Freezing levels will remain at valley bottom through this time.

Snowpack Summary

Profile at 2140m in Kootenay found HS 140-150 with no compression results. 30cm low density on settled midpack in that area. The basal Nov.6 crust W of divide less visible and is bonded very well.  On thin areas E of the divide the crust is facetting and weakening. Windslabs 20-40cm thick to 1 finger stiffness found on lees of ridges in the alpine.

Avalanche Summary

No avalanche observations in the last 24 hours.  Mainly stable snowpack at the moment, especially West of the divide.

Confidence

The weather pattern is stable

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.