Avalanche Forecast

Issued: Dec 29th, 2023 4:00PM

The alpine rating is considerable, the treeline rating is moderate, and the below treeline rating is low. Known problems include Persistent Slabs.

Avalanche Canada ahanna, Avalanche Canada

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Rapidly warming alpine temperatures may destabilize buried weak layers. Manage uncertainty through conservative terrain choices and be ready to back off at signs of warming.

Summary

Confidence

Moderate

Avalanche Summary

Avalanche activity in this region has been limited to a couple of size 1 wind slabs in the alpine.

Data in this region is limited. Please consider sharing your observations on the Mountain Information Network (MIN).

Snowpack Summary

The upper snowpack is generally well settled, including previously wind-affected surfaces in the alpine.

The mid snowpack contains a couple layers of note; a hard crust formed by an early December rain event around 60 cm deep and a layer of surface hoar 60 to 100 cm deep. Where it exists, the crust effectively bridges underlying weak layers, but the surface hoar remains a concern in areas that do not have the overlying crust.

The make-up of the lower snowpack is variable throughout the region, in shallower snowpack areas, basal facets may exist.

Weather Summary

Friday night

Partly cloudy. Moderate to strong southeast wind. Treeline temperature -3 °C. Freezing level 800 m with an above freezing layer in the alpine, 1800-3000 m.

Saturday

Increasing cloud. Moderate southeast wind. Treeline high temperature 0 °C. Freezing level 800 m with an above freezing layer in the alpine, 1800-2500 m.

Sunday

Mostly cloudy. Light northwest wind. Treeline temperature -2 °C. Freezing level 800 m.

Monday

Mostly cloudy. Light northeast wind. Treeline temperature -5 °C. Freezing level 700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Extra caution for areas experiencing rapidly warming temperatures for the first time.
  • The more the snowpack warms-up and weakens, the more conservative you`ll want to be with your terrain selection.
  • A moist or wet snow surface, pinwheeling and natural avalanches are all indicators of a weakening snowpack.
  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.

Problems

Persistent Slabs

An icon showing Persistent Slabs

A layer of surface hoar is buried 60 to 100 cm deep. This layer may be triggerable by riders at higher elevations, where it is not bridged by a thick overlying crust.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1.5 - 3

Valid until: Dec 30th, 2023 4:00PM

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