Bulletin d’avalanche

Jasper

Apr 27 – 28, 2023Avalanche Canada
Voir sur la carte
Archivé · expiré 3 years ago

Danger d’avalanche

Sat
Sun
Alpin
4 · Fort
Limite forestière
4 · Fort
Sous la limite
4 · Fort

Points saillants

The next few days will be a beautiful time to enjoy recreating in non-avalanche terrain, or in controlled areas like a ski hill.

Problèmes avalancheux

  • Cornices

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

    Cornices will become increasingly unstable as the warm weather continues, and will likely act as triggers for the deep persistent slab problem.

  • Loose Wet

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

    Warming temperatures will continue to produce wet loose avalanches.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    2–4

    The bottom of the snowpack is inherently weak with well-developed Facets and Depth Hoar. These avalanches have the potential to reach the end of run out zones well below tree line.

Confidence

High

Avalanche Summary

Several deep persistent slabs and several loose wet avalanches were observed from the icefields parkway Thursday.

Post avalanche observations to the MIN.

Snowpack Summary

Multiple melt-freeze and sun crusts exist in the upper snowpack on all aspects and elevations except true north facing alpine slopes. Small wind slabs have formed in the alpine from moderate to strong SW winds. A crust/facet PWL lingers in the mid-pack in many areas at tree line and above. The main concern is the depth hoar and basal facets at the base of the snowpack.

Weather Summary

A dramatic rise in daytime temperatures and strong solar radiation is forecasted for the next several days. There is also forecasted to be warm air trapped at higher elevations overnight, so don't let cool early mornings at valley bottom mislead you into thinking there has been a good overnight freeze.

Terrain and Travel Advice

  • Only the most simple non-avalanche terrain free of overhead hazard is appropriate at this time.

Régions couvertes