Bulletin d’avalanche

Jasper

Apr 22 – 23, 2021
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Archivé · expiré 5 years ago

Danger d’avalanche

Sat
Sun
Alpin
Sans niveau
Limite forestière
Sans niveau
Sous la limite
Sans niveau

Points saillants

Cooler temperatures the next couple of days helps overall stability. A little bit of new snow will improve ski quality. 

Problèmes avalancheux

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1.5–3.5

    These features are large, dense and heavy and will possibly trigger the deeper instability on the slope below. If you must travel near or below cornices, use good travel techniques and group management to reduce exposure.

  • Persistent Slabs

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

    Shallow snowpack areas in the alpine and some treeline locations have the potential for human triggered and natural avalanches stepping to deeper layers if you get it wrong.

  • Loose Wet

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

    Start early to avoid this problem. Cooler temperatures, cold nights, North and Easterly winds, and clouds will make this less of a concern the next couple of days. Be vigilant for an  increase in activity if the sun makes an appearance.

Confidence

Weather Forecast

Friday will bring clouds, flurries, a trace amount of snow, -6 C, light winds, and 1400m freezing level. Saturday will be clouds, sun, flurries, trace of snow,  -10 to -4C, light East winds, and 1700m freezing level.

Snowpack Summary

Expect a little bit of snow on a supportive melt-freeze crust on all aspects and elevations except for most high Northerly where it can be dry and powdery. The mid-pack is thick and supportive. Weak faceted crystals linger at the bottom of the snowpack and remain a concern particularly in shallow snow-packs.

Avalanche Summary

No patrol occurred on Thursday and nothing new was reported. Wednesday's field patrol in the Icefields noted one loose wet slab size 2 and another slab to ground on SW face size 2 in the Sunwapta falls area.

Régions couvertes