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Avalanche Forecast

Archived

Dec 6th, 2014–Dec 7th, 2014

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

Regions

Cariboos.

New wind slabs may be a concern in exposed terrain. Persistent slabs remain a concern anywhere that did not avalanche last week. If you observe any new activity, please send us an email to [email protected]

Confidence

Poor - Due to the number of field observations

Weather Forecast

A weak ridge of high pressure will bring dry conditions and some sun for Sunday. On Monday, the pattern changes to a strong SW flow which will persist for several days. Freezing levels will rise to around 1500m on Monday and as high as 2500m on Tuesday. Light precipitation is expected for Monday and Tuesday and alpine winds are expected to be moderate-strong from the SW.

Avalanche Summary

No new avalanches have been reported.

Snowpack Summary

Recent reports from the region suggest that anywhere from 50-150 cm of settling snow overlies one or more weak layers which formed during November. Snowpack tests suggest that these weak layers are getting harder to trigger but still have the potential to produce large avalanches if triggered. Recent wind has created wind slabs in lee features in exposed alpine terrain.

Problems

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.

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.