Bulletin d’avalanche

Jasper

Feb 17 – 18, 2023Avalanche Canada
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Archivé · expiré 4 years ago

Danger d’avalanche

Sun
Mon
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
1 · Faible
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Points saillants

Strong to extreme winds are likely stripping exposed features. This intense wind can create wind slabs in places you don't usually expect them.

Problèmes avalancheux

  • Wind Slabs

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

    Southwest winds have created wind slabs in the alpine and tree line.

  • Deep Persistent Slabs

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

    The bottom of the snow pack is inherently weak with well developed Facets and Depth Hoar. Large natural and explosive triggered avalanches in the last couple of days have run on this layer.

Confidence

Moderate

Avalanche Summary

Two large avalanches noted in the Maligne and Churchill Ranges in the alpine on east facing slopes on Wednesday. No Patrol on Thursday.

Don't forget to post avalanche observations to the MIN.

Snowpack Summary

Strong to extreme winds are stripping exposed features and building cross loaded wind slabs in the alpine. Wind slab likely extend down into tree line. In sheltered locations 30cm of low density snow lies over a generally weak mid and bottom snowpack with facets and depth hoar at the base. The height of snow is variable from 50 to 150cm.

Weather Summary

Friday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: High -13 °C.

Ridge wind west: 15-35 km/h.

Saturday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: Low -15 °C, High -9 °C.

Ridge wind west: 15-35 km/h.

Detailed weather forecasts from Avalanche Canada: https://avalanche.ca/weather/forecast

Terrain and Travel Advice

  • Expect slab conditions to change drastically as you move into wind exposed terrain.
  • Keep in mind that human triggering potential persists as natural avalanching tapers off.

Régions couvertes