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Avalanche Forecast

Archived

Feb 4th, 2013–Feb 5th, 2013

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 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.

Strong wind today, which will be followed up with 20cm of new snow tomorrow will raise the danger rating. Additionally, cornices are weak presently, so choose terrain that minimizes your exposure to them.

Weather Forecast

As the winds die down tonight, expect the current system to deliver up to 20cm of new snow over the next 48 hours. Likely, these weather factors will increase the avalanche danger. The system is expected to subside by Thursday midday.

Snowpack Summary

Little change from yesterday. However, strong winds and light precip has increased soft wind slab development. In general, expected a faceted snowpack, especially in areas with < 100cm of snow. Also, the Jan 6 interface is still present in isolated locations. It is buried approximately 40cm down and is generally unreactive to human traffic.

Avalanche Summary

No avalanches reported or observed today.

Confidence

Track of incoming weather systems is 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.