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Avalanche Forecast

Archived

Apr 28th, 2013–Apr 29th, 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, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Little Yoho.

Another weak storm will create some more isolated windslabs on steep alpine slopes. Otherwise, the crusts will be intact and strong for much of the day. A significant warm up towards the end of the week may trigger a spring cycle.

Weather Forecast

A weak storm will bring a little bit of snow to higher ground. Temps initially will be cool heating up considerably later in the week.

Snowpack Summary

Cooler temperatures have refrozen the snowpack. Upper elevations have new fresh snow and some windslabs.

Avalanche Summary

There have been a few cornice falls and steep wind slabs reported over the last week. All on steep terrain and not running very far.

Confidence

Freezing levels are uncertain on Thursday

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.