Avalanche forecast

Jasper

Apr 10 – 11, 2025Avalanche Canada
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Avalanche danger

Sat
Sun
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
No rating
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Highlights

The winds have increased and we are expecting new snow. Watch for fresh wind slabs potentially down into tree line.

Avalanche problems

  • Wind Slabs

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

    New windslabs are being formed from south winds and convective flurries.

  • Cornices

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

    Changing conditions (solar, new load) may result in cornice failure, acting as a large trigger on the slope below. Avoid overhead exposure containing overhanging cornices.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    2–4

    Small avalanches have the potential to step down to this deeper problem layer, made up of buried weaker facets.

Confidence

Moderate

Avalanche Summary

Small windslab avalanches and large natural cornice avalanches have been observed in Jasper or just to the south of Jasper over the last couple of days.

Snowpack Summary

New windslabs are forming from strong south winds and new snow. The upper snowpack at treeline and below is a series of melt-freeze crusts and moist snow. The mid-pack and lower snowpack is dry, faceted and weak. The alpine and treeline snowpack on north aspects remains dry. Average treeline snow depth is around 100-150cm at the icefields area.

Weather Summary

Friday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: High -5 °C.

Ridge wind southwest: 20 km/h gusting to 70 km/h.

Freezing level: 1700 metres.

Saturday

Flurries.

Accumulation: 6 cm.

Alpine temperature: Low -9 °C, High -6 °C.

Ridge wind west: 15-35 km/h.

Freezing level at valley bottom.

Terrain and Travel Advice

  • Make conservative terrain choices and avoid overhead hazard.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.

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