Avalanche forecast

Jasper

Feb 28 – Mar 1, 2021
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Archived · expired 6 years ago

Avalanche danger

Mon
Tue
Alpine
3 · Considerable
Treeline
2 · Moderate
Below
2 · Moderate
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Highlights

Neighboring regions have issued a special avalanche warning. Our snowpack went through a significant change since the deep freeze in early February. Recent winds and temperature fluctuations have created a highly complex untrustworthy snowpack.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–3

    Wind slabs in the alpine and exposed treeline features have the potential for wide propagations across connected features.

  • Deep Persistent Slabs

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

    Caution in thin facetted snowpack areas where triggering is more likely. This is a low probability but high consequence problem.

Weather Forecast

Sunday: Cloudy with scattered flurries. 4 cm. High -6 °C. Wind southwest: 25-40 km/h.

Monday: Flurries. 7 cm. Low -8 °C, High -6 °C. Wind southwest: 25 km/h gusting to 65 km/h.

Snowpack Summary

Widespread extensive wind effect in the alpine and is highly variable. The lee has windslabs (generally hard) that are well down into the terrain. The windward has been heavily stripped. Treeline and below has wind effect in any exposed terrain. The snowpack below the alpine is faceted with depth hoar near the base and is failing in test results.

Avalanche Summary

There has been a wind slab avalanche cycle in the last week hours from the extreme winds. Most avalanches were size 2 and in the alpine below ridge tops with one size 3 noted that ran down below treeline.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Monday

Regions covered