Bulletin d’avalanche

Glacier

Dec 21 – 22, 2024Avalanche Canada
Voir sur la carte
Archivé · expiré 2 years ago

Danger d’avalanche

Mon
Tue
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

The most recent storm snow still needs time to settle. Be especially cautious moving into steep wind effected terrain in the alpine.

Problèmes avalancheux

  • Persistent Slabs

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

    60-80cm of snow overlays a layer of surface hoar in sheltered zones, and a sun crust on steep, solar aspects. There has been limited activity on this layer in recent days, but the new load from the incoming storm could re-awaken this problem.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–2.5

    Recent new snow, accompanied by strong SW winds has created a slab that will need time to settle.

Confidence

Moderate

Avalanche Summary

Several natural avalanches were observed in the highway corridor due to a wind spike overnight into Friday. Naturals ran up to size 3 with some running running full feature.

Avalanche control at Rogers Pass on Wednesday produced storm slab avalanches to size 3.

Snowpack Summary

15cm of new snow has fallen with strong gusting Southerly winds. This lands on a series of storm layers from the last week. A persistent weak layer is down 60-90cm. This interface consists of surface hoar in sheltered locations, a sun crust on solar aspects, and continues to produce moderate-hard sudden results in test profiles. The snowpack's base is comprised of several early-season melt-freeze rain crusts.

Weather Summary

Remnants of Saturdays coastal system will push into southern interior bringing a pattern of light snow & flurries overnight into the work week.

Tonight: Trace, Alp low -3°C, Mod-Strong SW wind, Freezing level (FZL) 1700m

Sat: 6cm. Alp High 1°C, Strong SW winds, FZL 1900m

Sun: Trace precip, Alp High -4°C, Moderate SW wind, FZL 1400m.

Mon: 4cm, Alp High -4°C, Moderate SW wind, FZL 1400m

Terrain and Travel Advice

  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.
  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.

Régions couvertes