Bulletin d’avalanche

Jasper

Dec 8 – 9, 2019Parks Canada
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Archivé · expiré 7 years ago

Danger d’avalanche

Mon
Tue
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

New snow will make for great skiing! Caution is advised as snow coverage over hazards such as rocks and trees may be thin. Snowpack variability will require careful assessment of every run.

Problèmes avalancheux

  • Wind Slabs

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

    New soft windslabs have formed in the lee areas. The distribution at treeline is more isolated.

  • Persistent Slabs

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

    Avalanches possible where wind has stiffened the new snow into a slab.

  • Loose Dry

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

    Up to 40 cm of unconsolidated new snow could cause significant sluffing in entrained ice climbing features.

Weather Forecast

The storm ends Saturday night replaced by clear cold air and northerly winds.

Sunday: Temps drop with a northerly flow.  Mix of sun and cloud.

Monday: Mix of sun and clouds.  Temps from -5 to -10 and light northerly ridge winds.

Tuesday: Mix of sun and cloud.  Seasonal temperatures and light Westerly winds.

Details here: Mountain Weather Forecast.

Snowpack Summary

40 to 50 cm of snow has fallen since Tuesday on a mix of surfaces; ground, surface facets, surface hoar, and previous wind slab and/or hard wind pressed surfaces. Moderate SW winds are building soft wind slabs at ridge tops. The Oct. and Nov. crusts are present in the mid and lower snowpack. Basal facets are weak and are changing into depth hoar.

Avalanche Summary

No new avalanches reported or observed by field teams today.

Confidence

Due to the number and quality of field observations on Sunday

Régions couvertes