Boletín de aludes

Glacier

Dec 16 – 17, 2024Avalanche Canada
Ver en el mapa
Archivado · caducó 2 years ago

Peligro de aludes

Wed
Thu
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
Abrir el mapa completo

Lo esencial

New snow and strong SW wind has created wind slabs on all aspects in the alpine. Wind slabs can also be found in lee terrain at tree line.

Ski quality is excellent in terrain that is sheltered from the wind.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–3

    Recent snowfall has been redistributed by strong S-SW winds building widespread wind slab in the Alpine. At tree line elevation, wind slab can be found in leeward terrain. If triggered, wind slabs may step down to a persistent weak layer buried 60-80cm deep.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1.5–3.5

    60-80cm of snow overlays a layer of surface hoar in sheltered zones, and a sun crust on steep, solar aspects. Activity on this layer had slowed in recent days, but the new load from this current storm could re-awaken this problem.

    A Rutschblock 3 was recorded at 2050m in the Asulkan area on Sat down 65cm

Confidence

Moderate

Avalanche Summary

Several avalanches ranging from size 1-3 observed in the highway corridor on a road patrol today.

These were likely initiated by wind loading on Saturday and Sunday evening.

Snowpack Summary

~20cm of recent storm snow combined with moderate to strong Southwest wind has created wind slabs.

A persistent weak layer remains down 50-70cmcm. 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 base of the snowpack is comprised of several dense, melt-freeze rain crusts formed in October/early November.

Weather Summary

Weakening low pressure system early this week before a significant storm arrives on Wed.

Tonight Trace precipitation. Wind SW 15km/h

Mon Mainly cloudy with isolated flurries. Trace precipitation. Alpine high -9 °C. Ridge wind SE 10. Freezing level (FZL) 700m.

Tues Cloudy with sunny periods & isolated flurries. Trace precipitation. Wind SW 15. FZL 900m.

Wed Snow! ~24 cm. Alpine high -3. Wind SW 25-45. FZL 1500m

Terrain and Travel Advice

  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.

Regiones cubiertas