Avalanche forecast

Jasper

Dec 27 – 28, 2014Parks Canada
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Archived · expired 12 years ago

Avalanche danger

Sat
Sun
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
1 · Low
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Highlights

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

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    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

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    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

Regions covered