Bulletin d’avalanche

Jasper

Dec 27 – 28, 2014Parks Canada
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Archivé · expiré 12 years ago

Danger d’avalanche

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

Loose snow sluffing out of steep rocky alpine terrain will be a concern for ice climbers.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Northerly winds reverse loading cross-loaded gulley features. Previous wind slab from SW winds appear to be well bonded to snow below.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    This weak layer exists below a strong mid-pack at treeline and sub-alpine elevations. Large loads such as surface slides or cornice collapse could trigger this deep persistent weakness.

Weather Forecast

Increasing NW winds overnight with 3-6 cm of snow.  Cool temperatures.  Skies clear on Sunday with light NW winds dropping temperatures in to low -20's.

Snowpack Summary

New wind slab forming from reverse loading Northerly winds along cross-loaded gulley features. The interface between the strong mid-pack and weaker basal facets is most susceptible to human triggering from shallow rocky areas.

Avalanche Summary

Very thin loose snow avalanches observed on East and West alpine aspects from steep rocky terrain. Some very thin slab avalanches (Size 0.5) on reversed cross-loaded gulley features.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Sunday

Régions couvertes