Avalanche forecast

Jasper

Jan 11 – 12, 2018Parks Canada
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Archived · expired 9 years ago

Avalanche danger

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

Buried old wind slabs (persistent slab) vary in reactivity and warrant a site by site assessment.

Avalanche problems

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2
    New snow covers pockets of old wind slabs on a weak interface in exposed alpine and TL features. Bigger, uniform features have the potential to trigger large avalanches and should be treated with caution.

  • Loose Dry

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    1–2
    New snow covers a facetted/weak upper snowpack in sheltered areas. Be cautious in very steep terrain and in confined features where a small sluff could build mass.

Weather Forecast

An arctic front has pushed the jet stream to our south.  Cold air and L winds will persist through Thursday.Thursdays forecast is for a mix of sun and cloud, alpine lows -18C, highs -14 C, and light wind. A ridge sliding in from the Coast will give warming temps and light W winds in to the weekend.

Snowpack Summary

Up to 15cm of snow (3 days), sits on pockets of old wind slab in exposed areas (these sit on weak facets and srfce hoar many locations), and a facetted upper snowpack in sheltered areas at all elevations. A strong mid snowpack crust is providing some strength around treeline. The faceting process (weakening) is well underway in the lower snowpack.

Avalanche Summary

No new avalanches observed or reported.

Confidence

Due to the number of field observations

Regions covered