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Avalanche Forecast

Archived

Jan 26th, 2013–Jan 27th, 2013

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

Regions

Little Yoho.

Windslabs from this week's storm are predominantly found in the alpine, W of the divide. Good skiing can be found in protected tree-line and below tree-line features.

Weather Forecast

The region should see increasing cloudiness with trace amounts of snow tomorrow, along with gusty W/NW winds. Temperatures should cool slightly. Sunday night and Monday may bring 15-20cm of snow and moderate/strong NW winds.

Snowpack Summary

Up to 30cm this week along and W of the divide, with lesser amounts to the E. Soft wind slabs are sitting on previous hard wind slabs in the alpine. Mainly facetted midpack in thin snowpack areas. Jan 6 surface hoar can be found in various locations down approx.30 cm. This layer may wake up with Monday's storm if we get more than 25cm of snow.

Avalanche Summary

Solar point releases from steep south-facing slopes in the alpine. Isolated thin soft slabs noted from NE facing convexities in Kootenay near tree-line.

Confidence

Forecast snowfall amounts are uncertain

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.