Boletín de aludes

Jasper

Feb 24 – 25, 2024Avalanche Canada
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Archivado · caducó 3 years ago

Peligro de aludes

Mon
Tue
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Lo esencial

The incoming storm is expected to bring continued strong winds and snowfall amounts of up to 10-20 cm between Friday evening and Monday morning. Use caution in areas which are exposed to overhead hazard and show evidence of wind slab development.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2

    Wind slabs and cornice growth continue to develop in the alpine.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1–2.5

    This weak layer is buried 20-40cm deep. Human triggering remains possible, particularly in shallow rocky start zones.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1–3

    The base of the snowpack is inherently weak and untrustworthy. Human and natural triggering of these basal facets remains possible.

Confidence

Moderate

Avalanche Summary

Strong winds are contributing to cornice growth and are producing wind slabs in areas where snow is available for transport. Three recent avalanches were observed in the Churchill group originating from steep, rocky terrain and ranged in size from 1.5 to 2.5. Increased avalanche activity is expected throughout the weekend as snow accumulates and the strong winds continue.

Snowpack Summary

The multiple buried crusts within the upper snowpack are starting to lose strength in some areas. The Feb 3rd crust is down 15-30cm in wind protected areas. Strong ridgetop winds are producing wind slabs in the alpine where snow is available for transport. The Persistent and Deep Persistent weak layers continue to produce sudden fractures in tests and have been reactive to cornice failures in steep, rocky terrain.

Weather Summary

The Mountain Weather Forecast is available at Avalanche Canada https://avalanche.ca/weather/forecast

Saturday's Weather Flurries with accumulation of 5-10 cm.

Alpine temperature: High -5 °C.

Ridge wind west: 25 km/h gusting to 70 km/h.

Freezing level at valley bottom

Terrain and Travel Advice

  • Avoid shallow snowpack areas, rock outcroppings and steep convex terrain where triggering is most likely.
  • Minimize exposure to overhead avalanche terrain, large avalanches may reach the end of runout zones.

Regiones cubiertas