Avalanche forecast

Jasper

Dec 30 – 31, 2020
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Archived · expired 6 years ago

Avalanche danger

Thu
Fri
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
1 · Low
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Highlights

Dig down and investigate the snowpack before committing to a line. Report your findings on the MIN.

Avalanche problems

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–2.5

    In the alpine hard slabs sit overtop of facets. Dec 14th surface hoar to 6mm can be found in sheltered locations up to 2200m.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1.5–3.5

    Be cautious of thick to thin snowpack areas being likely trigger locations. The persistent slabs have the potential to step down to the weakness at the base of the snowpack.

Weather Forecast

Wednesday: Cloudy with sunny periods and isolated flurries. Precipitation: Trace. Alpine temperature: High -9 °C. Ridge wind southwest: 15 km/h.

Thursday: Cloudy with sunny periods and isolated flurries. Precipitation: Trace. Alpine temperature: Low -10 °C, High -7 °C. Ridge wind southwest: 15-35 km/h.

Snowpack Summary

15-30cm of soft or dense snow (location dependent) over a generally firm mid-pack. Dec. Surface Hoar is down 40cm in isolated sheltered spots. An early season crust is down 40-100cm and decomposing. It overlies facets and depth hoar at the bottom of the snowpack but is well bridged by the mid-pack above unless found at shallow location.

Avalanche Summary

No new avalanches observed. No patrol yesterday

Confidence

Intensity of incoming weather systems is uncertain on Friday

Regions covered