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Avalanche Forecast

Archived

Nov 26th, 2016–Nov 27th, 2016

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

Regions

Little Yoho.

Due to a lack of snow below treeline, we have yet to access this area for observations.  However, we suspect that there are newly formed wind slabs at upper elevations which should be treated with caution until  the new snow settles out. SH

Weather Forecast

Only a few cm of snow Sunday and dying Westerly winds with a cooling trend. Monday and Tuesday look much the same.

Snowpack Summary

Up to 30cm of new snow over the last 48 hours with shifty winds forming wind slabs. Below this 15-30 cm of recent snow sits on top of a crust which is slowly breaking down. This crust is found everywhere except on high N slopes. The bond to the crust seems strong in most places and sits over a strong base.

Avalanche Summary

No new observations were reported Saturday.

Confidence

Due to the number and quality of field observations

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.

Loose Dry

Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.