Bulletin d’avalanche

Jasper

Apr 1 – 2, 2018Parks Canada
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Archivé · expiré 9 years ago

Danger d’avalanche

Tue
Wed
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

Happy Easter Everyone!

Problèmes avalancheux

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–3
    Cornices are growing with fresh snow additions. Several failures were noted, in most cases triggering a slab below.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2.5
    Wind slabs sit on a hard melt-freeze crust on solar aspects, and facets on polar aspects. Assess the bond at these interfaces carefully before committing to to a slope.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2.5
    In most cases this interface presents as a manageable surface instability and is expected to go dormant pretty quickly. Pay close attention to any fellow travelers above and/or below you as enter fresh terrain.

Weather Forecast

Weak fronts spinning off an Aleutian Low will push against the Arctic high that sits over Alberta. This will give a mix of sun and cloud with light flurries until later in the week.  The overnight low for Monday will be -20, with the daytime high reaching -10.  Winds will remain light and variable.

Snowpack Summary

A variety of slab conditions exist on most aspects at treeline and above. 10-20cm of recent storm snow has created a soft storm slab. This storm slab is up to 30cm thick . Below this, older slabs up to 60cm thick sit on a sun-crust on solar aspects and facets on polar aspects. Below treeline the snow is shallow.

Avalanche Summary

Explosives work on the Icefields Parkway produced numerous soft slab up to size 2.5. 

Confidence

Régions couvertes