Bulletin d’avalanche

Jasper

Mar 14 – 15, 2025Avalanche Canada
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Archivé · expiré 2 years ago

Danger d’avalanche

Sun
Mon
Alpin
4 · Fort
Limite forestière
3 · Marqué
Sous la limite
3 · Marqué
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Points saillants

Avalanche danger remains high with a sensitive and persistent problem and a snowpack that has doubled in the last week.

Make conservative terrain choices and avoid large avalanche paths and overhead hazards.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2.5

  • Persistent Slabs

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

    This avalanche problem is associated with a weak facet and crust layer, buried at the end of January, down approximately 70cm in sheltered areas. This also includes a crust layer formed in early March below the recent storm snow most prominent on solar aspects.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3.5

    Well developed facets and depth hoar at the bottom of the snow pack are still producing large avalanches in our region. Several large natural deep persistent slab avalanches released during or immediately after the storm.

Snowpack Summary

A further 20-30cm cm of new snow fell on Thursday brining new snowfall amounts to around 70-80cm. Below this fresh snow, the snowpack is complex, with multiple crusts and facet layers creating persistent weak layers. The bottom of the snowpack consists primarily of weak facets and depth hoar.

Confidence

High

Avalanche Summary

On Friday an avalanche cycle produced numerous avalanches up to size 3 in alpine terrain, running into treeline. These avalanches showed wide propogation, connecting through multiple terrain features.

Weather Summary

Saturday

Cloudy with scattered flurries.

Accumulation: 5 cm.

Alpine temperature: High -7 °C.

Ridge wind south: 10-25 km/h.

Freezing level at valley bottom.

Sunday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: Low -12 °C, High -7 °C.

Mostly light ridge wind occasionally gusting to 40 km/h.

Freezing level at valley bottom.

Monday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: Low -12 °C, High -9 °C.

Ridge wind west: 20-30 km/h.

Freezing level at VB

Terrain and Travel Advice

  • Use conservative route selection. Choose simple, low angle terrain with no overhead hazard.
  • Avoid exposure to overhead avalanche terrain; avalanches may run surprisingly far.
  • Recent wind has varied in direction, so watch for wind slabs on all aspects.

Régions couvertes