Avalanche forecast

Jasper

Nov 30 – Dec 1, 2021
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Avalanche danger

Wed
Thu
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
2 · Moderate
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Highlights

On Tuesday afternoon the Icefields Parkway from Athabasca Falls to Saskatchewan Crossing will be closed. A significant winter storm is forecasted for Jasper. Please plan to be out of the closure by 15:00.

Avalanche problems

  • Wind Slabs

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

  • Loose Dry

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

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1.5–3

    The average 1 meter snowpack has a crust near the ground surrounded by weakening large grain facets. This is a layer to watch as our neighbors are experiencing activity on it.

Weather Forecast

Tuesday:

Periods of snow.

Accumulation: 15 cm.

Alpine temperature: High -3 C.

Ridge wind southwest: 25 km/h gusting to 60 km/h.

Freezing level: 1700 metres.

Wednesday:

Snow, heavy at times.

Accumulation: 42 cm.

Alpine temperature: Low -3 C, High -1 C.

Ridge wind southwest: 20 km/h gusting to 65 km/h.

Freezing level: 2000 metres.

Snowpack Summary

Around 25cm of new snow in the last 36 hours. Moderate SW winds are creating new thin wind slabs in alpine lees over old hard wind slab or previous wind scoured rock. The mid-pack is around 80cm thick above a thin crust near the ground in some locations. Rain and warm temperatures are eating away the snowpack at the lower elevations.

Avalanche Summary

Explosive control on Parker Slabs on Monday produced thin wind slabs not propagating far. A few small natural slab avalanches out of steep lee features were also observed. Also a notable large avalanche off Whistler Mountain running to mid path near Jasper.

Confidence

Regions covered