Bulletin d’avalanche

Jasper

Apr 25 – 26, 2023Avalanche Canada
Voir sur la carte
Archivé · expiré 3 years ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
3 · Marqué
Sous la limite
Sans niveau
Ouvrir la carte complète

Points saillants

In the spring, convective flurries can drop vastly different amounts of snow from valley to valley. Maintain situational awareness and change your plans if faced with unexpected weather.

Problèmes avalancheux

  • Wind Slabs

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

    Moderate to strong south west winds and new snow from convective activity will make new wind slabs.

  • Loose Wet

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

    Warming temperatures will continue to produce wet loose avalanches.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–4

    The bottom of the snowpack is inherently weak with well-developed Facets and Depth Hoar. The next few days could see this problem moving into the reactive category with dramatically rising freezing levels.

Confidence

Low

Avalanche Summary

No new avalanches observed

Post avalanche observations to the MIN.

Snowpack Summary

Sun crusts on solar aspects into the alpine and a melt-freeze crust at tree line and below on all aspects. Small wind slabs in the alpine from moderate to strong SW winds and recent new snow. A layer of sun crust or facets linger in the mid-pack. The main concern is the depth hoar and basal facets at the bottom causing our deep persistent slab problem.

Weather Summary

Wednesday

Sunny with cloudy periods and isolated flurries

Precipitation: Trace

Alpine temperature: High 0 °C

Mostly light ridge wind occasionally gusting to 40 km/h

Freezing level: 2200m

Thursday

Sunny

Alpine temperature: Low -8 °C, High 0 °C

Mostly light ridge wind occasionally gusting to 40 km/h

Freezing level: 2200m

Terrain and Travel Advice

  • In areas where deep persistent slabs may exist, avoid shallow or variable depth snowpacks and unsupported terrain features.

Régions couvertes