Boletín de aludes

Jasper

Dec 28 – 29, 2020
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Archivado · caducó 6 years ago

Peligro de aludes

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

Conservative terrain choice is key until the reactivity of avalanche problems and their location can be deduced.

Problemas de aludes

  • Wind Slabs

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

    New wind slabs will take time to stabilize. Use caution when heading to wind prone locations.

  • Persistent Slabs

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

    Dec. Surface hoar to 6mm can be found in sheltered locations up to 2000m and is reactive to skier traffic.

  • Deep Persistent Slabs

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

    Be cautious of thick to thin snowpack areas being likely trigger locations. The wind slabs or persistent slabs have the potential to step down to the weakness at the base of the snowpack.

Weather Forecast

Monday: Cloudy with sunny periods. Precipitation: Nil. Alpine temperature: High -10 C. Ridge wind west: 10 km/h.

Tuesday: A mix of sun and cloud. Precipitation: Nil. Alpine temperature: Low -16 C, High -7 C. Ridge wind west: 10-20 km/h.

Snowpack Summary

15-30cm of soft snow or dense wind-slabs location dependent over a generally firm mid-pack. Dec. Surface Hoar is down 40cm in isolated sheltered spots and reactive to skier traffic. An early season crust is down 40-100cm and decomposing. It overlies basal facets and depth hoar but is well bridged by the mid-pack above unless shallow location.

Avalanche Summary

Sz 2 wind slab at 2000m on a NE aspect running far near the Saskatchewan Crossing yesterday. Surface hoar reactive to skier loads in isolated sheltered location up to 2000m.

Confidence

Due to the number of field observations

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