Bulletin d’avalanche

South Columbia

Dec 31, 2015 – Jan 1, 2016Avalanche Canada
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Archivé · expiré 11 years ago

Danger d’avalanche

Sat
Sun
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

Keep your wits about you as sun and above zero temperatures affect alpine slopes this weekend.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    Wind slabs may still be lurking behind ridges and ribs. Winds have recently changed directions so the problem could exist on either side of a ridge.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3
    As the temperatures in the alpine continue to rise, the sun will pack more punch. Loose avalanche activity is expected to continue from steep, rocky, sun-exposed slopes. The volume of dry snow could push you around.

Snowpack Summary

20-40 cm of settling low density snow overlies a generally strong snowpack. You may encounter wind slabs which are sensitive to the weight of a person near ridge tops. Recent storm snow may sluff in steep terrain, especially with a touch of sun. The lower snowpack is reportedly well settled. The early December weak layer (about 80-150 cm down) is spotty in distribution, but where it does exist still gives hard, sudden results, meaning it is unlikely to be triggered, but could produce a very large avalanche.

Confidence

High - Due to the number and quality of field observations

Weather Forecast

A dominant ridge of high pressure brings light northerly winds, sun and increasingly mild temperatures in the alpine. Below about 1700 m, expect valley cloud, flurries and cold temperatures. Alpine temperatures are expected to reach 0 degrees by Friday afternoon.For more details check out https://avalanche.ca/weather.

Avalanche Summary

Several small loose dry avalanches, small soft slab avalanches, and cornice releases have been reported over the last couple of days. Progressive warming in the alpine with ongoing sunny conditions could result in ongoing loose natural avalanches from south-facing slopes and by the weekend may create slab properties within the recent storm snow.

Régions couvertes