Bulletin d’avalanche

Jasper

Mar 22 – 23, 2012Parks Canada
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Archivé · expiré 15 years ago

Danger d’avalanche

Sat
Sun
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré
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Points saillants

A skier remotely triggered a size 3 avalanche today in the Portal creek drainage from 300m away, deep instabilities remain in the snowpack.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–4
    The buried surface hoar layer remains a concern in areas that have not recently avalanched. Variable winds have made judging bridging strength/depth a difficult task. Solar effect will weaken the bridging effect of the slab on exposed slopes.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    Recent mod-strong alpine winds have formed slabs and large cornices on lee slopes. Cornices anchors are weakened by solar radiation, especially along rocky, wind-exposed ridges. Cornice failure and windslab avalanches may trigger deeper layers.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Surface snow is responding to the strong solar radiation effect that happens in March and April. Ice climbers should also be wary of large pillows of snow still overhanging routes on solar aspects.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Timing or intensity of solar radiation is uncertain

Régions couvertes