Bulletin d’avalanche

Jasper

Feb 13 – 14, 2024Avalanche Canada
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Archivé · expiré 3 years ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

A few more centimeters of snow Monday night may be the last for a while, get ready to soak up some sunshine.

Continue to keep the Persistent and Deep Persistent avalanche problems on your mind, as a couple of recent large natural avalanches have reminded us they are not going away.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5

    Moderate to strong winds from the west and northwest have formed new wind slabs in leeward features in the alpine.

  • Persistent Slabs

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

    This weak layer, buried 20-40cm deep, is still reactive in snowpit tests and human triggering remains possible, particularly in shallow rocky start zones.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3

    The base of the snowpack is inherently weak and untrustworthy. Human and natural triggering of these basal facets remains possible.

Confidence

No Rating

Avalanche Summary

Two recent, and large, Deep Persistent Slab avalanches were observed along the Icefields Parkway on Sunday.

Snowpack Summary

A sun crust has formed on solar aspects up to tree line, and the northwest winds have redistributed the recent snow in open areas at tree line and above.

In sheltered areas 10 - 20 cm of low density snow overlies the Feb 3rd crust, which ranges from 1-3cm thick on shaded aspects up to 2500m, to 15-20cm thick at lower elevations. The Persistent and Deep Persistent weak layers continue to produce whoomphing and sudden fractures in tests.

Weather Summary

Tuesday

A mix of sun and cloud with isolated flurries.

Precipitation: Trace.

Alpine temperature: High -12 °C.

Mostly light ridge wind occasionally gusting to 35 km/h.

Freezing level at valley bottom.

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

Terrain and Travel Advice

  • Avoid shallow snowpack areas, rock outcroppings and steep convex terrain where triggering is most likely.
  • Minimize exposure to overhead avalanche terrain, large avalanches may reach the end of runout zones.

Régions couvertes