Avalanche Forecast

Archived

Feb 8th, 2021–Feb 9th, 2021

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.

Below Treeline

Natural avalanches unlikely.

Alpine

Natural avalanches unlikely, human triggered possible.

Treeline

Natural avalanches unlikely.

Below Treeline

Natural avalanches unlikely.

Regions

Jasper.

As the extreme cold penetrates the upper snow pack, watch for the development of a Loose Dry avalanche problem in steep terrain. Ice climbers should also be very leery of any hanging daggers. A couple large collapses have recently been observed.

Weather Forecast

Extreme cold warning for the region remains in effect. At least it'll be sunny.

Snowpack Summary

Cold temperatures are promoting surface facetting. Previous HST (25-55cm) is bonding well to underlying surfaces (facets, surface hoar, wind affected snow depending on location). Wind slabs in the ALP and exposed TL. A well settled mid-pack, except in shallow snowpack areas, can be found throughout the forecast region. Variable HS (90-200cm).

Avalanche Summary

A few isolated natural wind slabs, starting near alpine ridge crests, have been observed over the last couple days.

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Confidence

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.