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Avalanche Forecast

Archived

Feb 5th, 2014–Feb 6th, 2014

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

South Rockies.

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Confidence

Fair - Wind effect is extremely variable

Weather Forecast

Tonight and Wednesday: A ridge of high pressure is bringing cold and clear conditions. Light to moderate winds from the E are forecasted, mainly clear skies and temperatures around -15 C.Thursday: The ridge remains dominant bringing similar conditions with light winds from the E and slightly warmer temperatures (-13 C).Friday: Similar conditions with lighter winds and increasing cloud cover.

Avalanche Summary

No recent avalanches were reported.

Snowpack Summary

Recent N and NE winds have developed 10 to 40 cm thick windslabs on lee and cross-loaded alpine featured. In sheltered terrain, about 20 cm of dry light snow is sitting on a surface hoar layer, on old unreactive wind slabs or a melt-freeze crust on previously sun-exposed slopes. Cold temperatures are continuing to transform snow into facets at the surface or all the way down to the ground where the snowpack is thinner. The deep persistent weak layers are not as much of a concern at this moment because of the relatively stable weather pattern.

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.