Bulletin d’avalanche

Jasper

Dec 3 – 4, 2012Parks Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

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

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–3
    A size 2 avalanche was observed on the Parker ridge slidepaths. Pay particular attention to steep unsupported wind loaded slopes in the alpine.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–3
    A persistent facetted weakness can be found around a mid-pack crust.  An isolated size 3 avalanche on a steep Northerly large open slope in the Hilda Creek area likely ran on this layer.

Weather Forecast

Calm conditions with light snowfalls are expected overnight and through Monday. There is an expected frontal breakdown to come on Tuesday with increased amounts of snowfall in the icefields area and moderate winds from the Southwest.

Snowpack Summary

Hard test results were found at treeline on facets sandwiched between the two crusts in the icefields area. The crusts are deteriorating in this area.  Windslabs near ridgetops continue as the main concern.

Avalanche Summary

A size 3 slab was observed in the Hilda creek area. It originated from sloughing in a gully feature and expanded into a slab on a large open slope at 2400m that is the run out for the gully.  The slab likely propogated on facets around the November 01 rain crust.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Tuesday

Régions couvertes