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Avalanche Forecast

Archived

Apr 5th, 2015–Apr 6th, 2015

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

Northwest Inland.

The hazard may increase with daytime heating on solar aspects.  If you have information to share with other riders, tell us what you've seen here on the Mountain Information Network

Confidence

Fair - Freezing levels are uncertain

Weather Forecast

Sunny with cloudy periods for the forecast period. Mostly light south easterly alpine winds are expected. Daytime highs will bring the freezing level to around 1500m for the next few days, then climbing to close to 2000m by mid week.

Avalanche Summary

No reports of avalanches from the past few days.

Snowpack Summary

Recent storm snow brings the total for the last few precipitation events to 50cm in some parts of the forecast area. This accumulated storm snow is sitting on a variety of old crusty surfaces.  In addition, recent winds have scoured windward slopes and loaded lee features. Persistent weaknesses buried in the upper snowpack include hard crusts and/or facets, although not much is known about the reactivity or spatial distribution of these layers. At the base of the snowpack, especially in areas of shallow snow, weak facets may be found. Cornices are now large and potentially fragile.

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.