Avalanche forecast

Jasper

Apr 25 – 26, 2023Avalanche Canada
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Archived · expired 3 years ago

Avalanche danger

Thu
Fri
Alpine
2 · Moderate
Treeline
3 · Considerable
Below
No rating
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Highlights

In the spring, convective flurries can drop vastly different amounts of snow from valley to valley. Maintain situational awareness and change your plans if faced with unexpected weather.

Avalanche problems

  • Wind Slabs

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

    Moderate to strong south west winds and new snow from convective activity will make new wind slabs.

  • Loose Wet

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

    Warming temperatures will continue to produce wet loose avalanches.

  • Deep Persistent Slabs

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

    The bottom of the snowpack is inherently weak with well-developed Facets and Depth Hoar. The next few days could see this problem moving into the reactive category with dramatically rising freezing levels.

Confidence

Low

Avalanche Summary

No new avalanches observed

Post avalanche observations to the MIN.

Snowpack Summary

Sun crusts on solar aspects into the alpine and a melt-freeze crust at tree line and below on all aspects. Small wind slabs in the alpine from moderate to strong SW winds and recent new snow. A layer of sun crust or facets linger in the mid-pack. The main concern is the depth hoar and basal facets at the bottom causing our deep persistent slab problem.

Weather Summary

Wednesday

Sunny with cloudy periods and isolated flurries

Precipitation: Trace

Alpine temperature: High 0 °C

Mostly light ridge wind occasionally gusting to 40 km/h

Freezing level: 2200m

Thursday

Sunny

Alpine temperature: Low -8 °C, High 0 °C

Mostly light ridge wind occasionally gusting to 40 km/h

Freezing level: 2200m

Terrain and Travel Advice

  • In areas where deep persistent slabs may exist, avoid shallow or variable depth snowpacks and unsupported terrain features.

Regions covered