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Avalanche Forecast

Archived

Apr 22nd, 2013–Apr 23rd, 2013

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

Little Yoho.

Weather Forecast

Mixed sun and cloud is for Tuesday and Wednesday with some isolated flurries on Tuesday. Freezing levels will be around 1800 m with good recovery overnight.

Snowpack Summary

Cooler conditions should keep the crust solid for much of the day. Recent snow has created wind slabs just below ridge crests up to 30-40 cm thick. These slabs have been more touchy on southerly aspects where they overly a crust, but could be triggered on northerly aspects as well. Solar effect will loosen up the recent new snow on steeper terrain.

Avalanche Summary

Several small skier triggered windslabs up to size 1.5  have been reported over the last few days. These have been triggered on steep terrain just below ridgecrests. Storm snow over crust is the main ingredient.

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.