Avalanche forecast

Jasper

Dec 12 – 13, 2021
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Avalanche danger

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

Highlights

Loading happening at all elevations and aspects. Remain cautious as you travel in the back-country. Great riding can be found throughout the region.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    1.5–2.5

    New snow and moderate to strong SW winds building new windslab in lee and crossloaded features. Watch for hollow sounds and cracking. Consider testing smaller slopes before committing to larger features; windslabs could initiate deep layers.

  • Loose Dry

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    1–2

    Heavy down flow observed in the Wilson region. Ice Climbers, avoid all overhead exposure.

  • Storm Slabs

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

    Most concerning BTL is at the transitions into open areas around Parkers Ridge, Sunwapta Pass. In the Maligne valley, the hazard will build with more snowfall over the week.

Weather Forecast

Overnight Saturday: Flurries. Accumulation: 7 cm. Alpine temperature: Low -15 °C. Ridge wind southwest: 20 km/h gusting to 55 km/h.

Sunday: Cloudy with sunny periods and isolated flurries. Precipitation: Trace. Alpine temperature: High -14 °C. Ridge wind southwest: 15 km/h gusting to 45 km/h.

Snowpack Summary

Parkway seeing between 10cm, and up to 20cm HST redistributed by mod SW winds at ridge top. Incremental loading at TL and BTL will create widespread variable soft slab. This will remain an active hazard and is most concerning as you transition into steep open areas, areas often paired with terrain traps. 

Avalanche Summary

Heavy snowfall and limited visibility reported by forecasting team in the Icefields today.

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Confidence

Regions covered