Bulletin d’avalanche

Jasper

Jan 24 – 25, 2013Parks Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

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

A few centimeters of snow are expected overnight. If this occurs, hopefully this will soften up the skiing, and if so perhaps a few isolated, small soft slabs (10-15) might form in windloaded areas.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    1–3
    Recent wind effect has destroyed most of the surface snow and left hard slabs which could be triggered from shallow snowpack areas, or in isolated steep pockets of windloaded snow.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–3
    The lower depths of the snowpack are slowly facetting and becoming weaker, especially in shallow areas. Choose the deeper snowpack areas for your travel.

Weather Forecast

The ridge of high pressure that has dominated the pattern for the last week is being pushed out of the area by a southwesterly flow. A cold front will cross the Jasper area on Wed night leaving a maximum of 5 cm of snow. Thursday will see broken skies, no precipitation, moderate NW winds, and alpine temperatures ranging from -5 to -10.

Snowpack Summary

No significant changes to the snowpack in the last 24-hours. Widespread wind effect in most exposed areas at and above treeline has created hard slabs which overlie a weakness of facets or surface hoar down 10-40 cm (depending on location). Tests indicate a shear on this layer, but triggering is unlikely due to the stiffness of the slab.

Avalanche Summary

No new avalanches were observed along the Maligne Lake road today.

Confidence

Régions couvertes