Avalanche forecast

Jasper

Dec 15 – 16, 2020
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Archived · expired 6 years ago

Avalanche danger

Wed
Thu
Alpine
2 · Moderate
Treeline
1 · Low
Below
1 · Low

Highlights

The incoming storm will likely make the good skiing we have even better, but watch for changing conditions, especially if the amount of new snow or wind is more than forecasted.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    1–2

    Forecasted light snow and moderate winds may form new slabs on leeward and cross-loaded terrain features. These slabs will probably not bond well to the current snow surface.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1.5–3

    Be cautious of thick to thin snowpack areas being likely trigger locations. Weak facets layers near the ground continue to become weaker with these cold temperatures.

Weather Forecast

Parker Ridge Area

Tuesday: Flurries. Accumulation: 6 cm. Alpine temperature: High -8 °C. Ridge wind southwest: 20-40 km/h.

Wednesday: Mainly cloudy with scattered flurries. Accumulation: 5 cm. Alpine temperature: Low -9 °C, High -7 °C. Ridge wind southwest: 20 km/h gusting to 60 km/h.

Snowpack Summary

Surface Hoar has been steadily growing on the previous storm snow, which is now unconsolidated and faceting with the cold temps. This overlies a variety of old surfaces ranging from hard wind slab, facets and crusts on steep solar aspects. The bottom of the snowpack is continuing to facet.

Avalanche Summary

Confidence

Intensity of incoming weather systems is uncertain on Tuesday

Regions covered