Avalanche forecast

Jasper

Feb 6 – 7, 2020Parks Canada
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Archived · expired 7 years ago

Avalanche danger

Fri
Sat
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
2 · Moderate

Highlights

As you head out assume that ski terrain will be wind loaded and is untested.

Avalanche problems

  • Wind Slabs

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

    New and developing wind slabs in the forecast region. Slab sensitivity will vary; with potentially wide variations over a small area. Assess each slope independently. 

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1.5–3.5

    Wind loading and cornice development could trigger large avalanches

Weather Forecast

Trace of snow through out the day on Thursday.  Highs of -10C in the forecast area with moderate SW winds.

See Weather synopsis here: Avalanche Canada Mountain Weather Forecast

Snowpack Summary

Up to 50 cm of snow fell during last weeks storm in the forecast region. Previous mid-pack bridging over deeper instabilities is supporting the new load over the basal facets and depth hoar. This new load and bridging has still not been significantly field tested, treat the snowpack with caution.

Avalanche Summary

Poor visibility, treeline and above. Varied explosive results on the storm interface and on the persistent facet/depth hoar combos at the bottom of the snowpack. Obvious deep persistent release on Parkers Slabs produced size 2.5 - 3.0's; moving fast and leaving large impressive (~2m) crowns.

Confidence

Due to the number and quality of field observations

Regions covered