Bulletin d’avalanche

Jasper

Jan 19 – 20, 2017Parks Canada
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Archivé · expiré 10 years ago

Danger d’avalanche

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

Be cautious in the new snow.  Wind and storm slabs may be easily triggered.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3
    The interface between the new and old slabs could be touchy.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Storm slabs may be present  especially at tree-line.  The weight of this may overload the weak facets below.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3
    Concern for new snow overloading the season's weak faceted basal layers.

Weather Forecast

Further 7-10 cm possible until Thursday.  Moderate SW winds continuing, easing on Friday.  Temperatures will gradually fall into the weekend to seasonal levels. 

Snowpack Summary

Recent storm snow (between 10-20 cm) with heavier amounts in the southern forecast area has formed windslab on lee aspects from previous strong to extreme SW alpine winds.  Storm slabs may be present on lower elevation slopes.  These slabs are sitting on buried wind slabs overlying weak facets from the mid-pack to ground.

Avalanche Summary

No avalanche patrol today.  No avalanche observations reported.

Confidence

Due to the number of field observations on Thursday

Régions couvertes