Bulletin d’avalanche

Jasper

Mar 1 – 2, 2021
Voir sur la carte
Archivé · expiré 6 years ago

Danger d’avalanche

Tue
Wed
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
Ouvrir la carte complète

Points saillants

Incoming snowfall amounts vary significantly between forecasts. The only consistency is that it's going to be windy.

Avoid wind-loaded features as the recent and new wind slabs will probably not bond well to the facetted snow pack.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3

    Wind slabs in the alpine and exposed treeline features have the potential for wide propagations across connected features.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1.5–3

    Caution in thin facetted snowpack areas where triggering is more likely. This is a low probability but high consequence problem.

Weather Forecast

Monday: Flurries. Accumulation: 8 cm. Alpine temperature: High -6 C. Ridge wind southwest: 25 km/h gusting to 75 km/h.

Tuesda:y Flurries. Accumulation: 6 cm. Alpine temperature: Low -8 C, High -6 C. Mostly light ridge wind occasionally gusting to 50 km/h.

Snowpack Summary

Widespread wind effect in open areas at all elevations. Leeward features have wind slabs that are well down into the terrain, and windward aspects have been heavily stripped. The snowpack below the alpine is faceted with depth hoar near the base and is failing in test results.

Avalanche Summary

No new avalanches have been observed in the last couple days, but visibility has been limited. There has been a wind slab avalanche cycle in the last week from the extreme winds. Most avalanches were size 2 and in the alpine below ridge tops with one size 3 noted that ran down below treeline.

Confidence

Intensity of incoming weather systems is uncertain on Monday

Régions couvertes