Avalanche forecast

Jasper

Dec 26 – 27, 2020
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Archived · expired 6 years ago

Avalanche danger

Sun
Mon
Alpine
3 · Considerable
Treeline
2 · Moderate
Below
1 · Low

Highlights

Merry Christmas!!

Enjoy the holidays, but be mindful that you may find wind slabs on all aspects in the alpine and open tree line.

Avalanche problems

  • Wind Slabs

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

    Previous NW and present SW winds in the alpine and open tree line continue to develop wind slabs. Caution as these freshly built wind slabs are reactive and waiting for a trigger.

  • Loose Dry

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

  • 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. The wind slabs have the potential to step down to the weakness at the base of the snowpack.

Weather Forecast

Flurries overnight Friday into Saturday with continued light snowfall on Saturday, for a total forecasted snowfall of 5cm. Light winds and freezing levels remaining at valley bottom.

Snowpack Summary

A north wind event on Dec 22 loaded southerly lees; present strong SW winds are reloading northerly terrain with last weeks 40cm of storm snow. The new snow sits upon a facet layer with isolated surface hoar in sheltered areas TL and below. The midpack is generally supportive with a weaker base of facets and depth hoar. Avg depth is 65-160cm.

Avalanche Summary

No Na activity reported today, no avalanche patrol done.

Confidence

Wind effect is extremely variable

Regions covered