Avalanche forecast

Jasper

Feb 5 – 6, 2020Parks Canada
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Archived · expired 7 years ago

Avalanche danger

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

Highlights

Step out into the terrain cautiously!

More information and observations are needed to get an accurate picture of the effects the new snow to the snowpack.

Avalanche problems

  • Wind Slabs

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

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

  • Storm Slabs

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

    Up to 50 cm during the recent storm with Mod SW winds.

  • Deep Persistent Slabs

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

    Recent 50 cm of new snow has the potential to overload this weakness

Weather Forecast

Scattered flurries through the day Wednesday with as much as 4cm accumulation. Cold temps and steady SW-ly alpine winds.

See Weather synopsis here: Avalanche Canada Mountain Weather Forecast

Snowpack Summary

Storm snow, up to 50cm has blanketed much of the southern 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 not been significantly field tested, treat the snowpack carefully.

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 of field observations

Regions covered