Bulletin d’avalanche

Jasper

Mar 9 – 10, 2018Parks Canada
Voir sur la carte
Archivé · expiré 9 years ago

Danger d’avalanche

Sat
Sun
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
Ouvrir la carte complète

Points saillants

Warming trend a welcome change. Increasing hazard for Ice Climbers in steep solar aspects. Start early, finish early!

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–3
    A cold, facetting, and structurally weak slab up to 80cm thick overlies faceted crystals (well developed in shallow areas). Low elevations will present as a loose dry avalanche problem.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Late afternoon problem in steep, solar rocky terrain. Found to be entraining the surrounding, facetted snowpack and will build up volume quickly.

Weather Forecast

Spring like warming trend with a distinct south westerly flow. Freezing levels rising to treeline elevations into the weekend. Trace to 10cm of snow overnight Thursday and clearing by Friday afternoon. Strong, gusting westerly winds in the Alpine.

Snowpack Summary

Facetting has weakened the snowpack in isolated areas in the forecast region. Melt freeze cycle BTL with moist surface snow on steeper, rocky solar aspects. The upper snowpack is 50 to 80 cm, over the seasonally persistent instability. Wind effect in open areas in the alpine and treeline elevations.

Avalanche Summary

Explosive assisted, solar induced, loose dry avalanches to sz 1.5 in BTL south and south-west  aspects entraining the facets and running fast.

Confidence

Régions couvertes