Bulletin d’avalanche

Jasper

Jan 29 – 30, 2024Avalanche Canada
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Archivé · expiré 3 years ago

Danger d’avalanche

Wed
Thu
Alpin
4 · Fort
Limite forestière
3 · Marqué
Sous la limite
3 · Marqué
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Points saillants

Closures of the Icefields Parkway for avalanche control will take place on Monday, between the Parker Ridge and Pinto Lake trailheads. No backcountry access in this area is permitted, including the Weeping Wall area and Polar Circus.

See 511 Alberta for details.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2.5

    This layer is concerning when there is a cohesive slab overlying it. Watch for the warnings in the snowpack like shooting cracks.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2

    Watch for this problem to become more significant as the temperatures rise, particularly in steep and rocky terrain.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1.5–3

    The base of the snowpack is inherently weak and untrustworthy. Concern for human and natural triggering of this avalanche problem will increase as the temperatures rise over the next few days.

Confidence

High

Avalanche Summary

Numerous Deep Persistent and Persistent slabs have been observed over the past few days throughout the region.

Snowpack Summary

Fluctuating freezing levels with intermittent solar radiation has formed surface crusts up to 2000m on most aspects, and higher on steep sun effected ones. Persistent weak layers formed in early January are down 20-30cm in sheltered areas, and have been reactive more recently where wind loaded. Well developed facets and depth hoar make up the bottom of the snowpack.

Weather Summary

It will continue to be unseasonably warm with strong winds for the next couple days. There is also potential for some light precipitation near the icefields, likely a mix of rain or snow depending on elevation.

The Mountain Weather Forecast is available at Avalanche Canada https://avalanche.ca/weather/forecast

Terrain and Travel Advice

  • The likelihood of deep persistent slab avalanches will increase with each day of warm weather.
  • Make conservative terrain choices and avoid overhead hazard.

Régions couvertes