Avalanche forecast

Jasper

Dec 20 – 21, 2021
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Avalanche danger

Tue
Wed
Alpine
2 · Moderate
Treeline
1 · Low
Below
1 · Low
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Highlights

Avalanche hazard is decreasing, however, recent winds made looking for good skiing a little more difficult.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–2

    Recent avalanche control with minimal results, together with next to no natural activity proved this problem quite stubborn.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    2–3

    Triggering this layer would be a high consequence event - cautious decisions and thorough investigation is necessary. More likely to trigger this layer in transitions from thin snowpack to deeper loaded pockets or terrain features.

Confidence

The weather pattern is stable

Weather Forecast

Monday: Sunny with cloudy periods. Precipitation: Nil. Alpine temperature: High -14 °C. Ridge wind west: 10-20 km/h.Tuesday: A mix of sun and cloud. Precipitation: Nil. Alpine temperature: Low -18 °C, High -13 °C. Ridge wind west: 20 km/h. Freezing level at valley bottom.

Snowpack Summary

Moderate SW winds and small amounts of new snow has formed sensitive wind slabs in alpine and treeline areas. Mid and lower snowpack are mostly well consolidated base on recent observations.

Avalanche Summary

Avalanche control with use of explosives produced no significant results other than 2 small thin wind slabs. 1 larger natural wind slab was observed right below ridge crest in steep alpine feature on NE aspect.

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