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Avalanche Forecast

Archived

Jan 8th, 2013–Jan 9th, 2013

Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.

Regions

Little Yoho.

STORM INCOMING. Be cautious as the Jan 6th layer is overloaded with up to 40cm of snow in the alpine. Consequently, expect a large avalanche cycle to ensue. Valley bottom run-outs could be effected.

Weather Forecast

We are expecting up to 40cm of new snow in the alpine starting late tonight. The danger rating will climb to, and remain at, "HIGH" throughout the storm period. Westerly flow will accompany the precip. These weather factors WILL contribute to storm slab development.

Snowpack Summary

In the Sunshine Area approximately 15cm of snow fell last night. This has refreshed the ski quality, however, it has added more load to the Jan 6th layer. Although we have not reached a critical threshold as of today, it is important to remember that the incoming storm track will add significant load and this layer will "wake up", likely Weds.

Avalanche Summary

Avalanche 1: Natural trigger, Size 2, across from Vermillion slide path in Kootenay National Park. South aspect. 50m across and approximately 40cm deep. From steep and almost un-skiable terrain. It occurred within the last 24 hours.

Confidence

Intensity of incoming weather systems is uncertain on Wednesday

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.