Bulletin d’avalanche

South Rockies

Dec 23 – 24, 2011Avalanche Canada
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Archivé · expiré 15 years ago

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    Shifting winds have set up windslabs on a variety of aspects, particularly north through southeast.Cross-loading is also possible on open slopes oriented parallel to the wind, which contain features and gullies to catch wind-drifted snow.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Thin slabs may be reactive on the mid-December surface hoar/facet combo. Low mass events, but running far.

Confidence

Fair - Due to variable snopack conditions

Weather Forecast

Saturday: Expect mixed skies with strong westerly ridgetop winds. Some localized flurries are possible, especially towards the Crowsnest Pass and in northern parts of the region. Highs near 0. Sunday & Monday: Mostly clear, with occasional cloudy periods. Moderate to strong winds from the west-southwest with temperatures reaching -2 in the afternoons.

Avalanche Summary

No new avalanches. Nearby (in the Lizard Range) there were 2 incidents reported yesterday. Check out the incidents through these links: https://bit.ly/uBRvLX https://bit.ly/rE20wh

Snowpack Summary

Westerly winds continue, creating windslabs on lee locations in the alpine and open treeline. A buried layer of surface hoar lies approximately 20 cm below the snow surface. Reports indicate this layer was blown around before it was buried and can only be found in isolated, sheltered locations at and below treeline. A well settled mid pack bridges over the basal weaknesses at the ground. This lower layer was responsible for some large releases earlier in the season but we haven't seen any action on it lately. Worth keeping in the back of your mind around shallow snowpack areas where the bridging could be weaker.

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