Avalanche forecast

Jasper

Jan 29 – 30, 2017Parks Canada
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Archived · expired 10 years ago

Avalanche danger

Sun
Mon
Alpine
4 · High
Treeline
3 · Considerable
Below
2 · Moderate
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Highlights

A weak interface has hit critical load and is proving to be very sensitive. New snow and wind overloading this interface on all aspects and elevations.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–3
    Big open features should be avoided. Recent natural avalanche activity on these slopes is expected to continue.

  • Loose Dry

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely - Very Likely
    Size
    1–3
    Wind loading and shedding from steep faces, especially concerning for ice climbers.

Weather Forecast

Steady, seasonally mild alpine temperatures (-5 to -10). Forecasted SW winds with strong to extreme ridge top values. Some snow expected (5 to 10cms). Very good recipe for new building slab conditions.

Snowpack Summary

Surface hoar present in most areas unaffected by moderate winds. Exposed TL and ALP have been stripped of snow. Settling and distribution of upper and mid snow pack overlies facets and basal weakness.

Avalanche Summary

Numerous reactive windslab and loose dry avalanches reported along the parkway up to sz 2.5 on all aspects. Most active at TL elevations between (2200m - 2500m).

Confidence

Wind effect is extremely variable

Regions covered