Bulletin d’avalanche

Jasper

Jan 17 – 18, 2020Parks Canada
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Archivé · expiré 7 years ago

Danger d’avalanche

Sat
Sun
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Uncertainty on how the snowpack will react to the transition back to tolerable temperatures, caution and a dose of dubiety would be prudent before stepping out into big terrain.

Problèmes avalancheux

  • Wind Slabs

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

    New, building wind slab with variable loading depending on location. 

  • Deep Persistent Slabs

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

    The strength of the bridging over the basal weakness will determine it's sensitivity to triggers. Deep penetrating cold has weakened shallow areas and may be more susceptible to triggering and propagation.

Weather Forecast

The arctic air is on the retreat as a series of warm, moist fronts travel inland to the southern forecast region. Warming air aloft will likely trap cold air in the valleys. Light precipitation will occur during the air-mass transition to a SW flow.

Find the Alberta Rockies weather synopsis here: Mountain Weather Forecast

Snowpack Summary

Light snowfall through the region over surface faceting. That faceting morphosis will be more pronounced in shallow HS areas. Upper pack settled and overlays a weakening mid-pack comprised of varied facet forms. This provides some questionable bridging over the basal facets and DH. HS average at TL: ~150cm.

Avalanche Summary

No new avalanches observed or reported

Confidence

Wind effect is extremely variable on Friday

Régions couvertes