Bulletin d’avalanche

Jasper

Jan 26 – 27, 2020Parks 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
1 · Faible
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Points saillants

The snowpack is highly variable. The basal weakness is still giving sudden results and the bridging of the mid pack remains questionable.

Problèmes avalancheux

  • Wind Slabs

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

    Continued mod SW winds have created new wind slabs,

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3

    This is a complex problem. The spacial variability and potential consequences of triggering a large avalanche on this layer makes it extremely difficult to gain confidence in the snowpack. Consider this before entering bigger features.

Weather Forecast

Tonight and Sunday will see trace amounts of snow light SW winds and steady cooling.

Monday/Tuesday: Temps will continue to drop to -11 and SW  winds.

For more detailed analysis: Mountain Weather Forecast

Snowpack Summary

The snowpack is highly variable across the forecast area. The surface snow is becoming more cohesive and is bonding well. The upper snowpack remains mainly facetted, particularly in shallow areas where there is less than 60cm of snow. There is inconsistent bridging in the mid-pack over the weak basal facets and depth hoar.

Avalanche Summary

A road patrol of Maligne lake road showed no new signs of avalanche activity. Wednesday's helicopter flight observed only two recent large cornice failures that initiated avalanches in the weak basal facets and one windslab avalanche.

Confidence

The weather pattern is stable

Régions couvertes