Boletín de aludes

Jasper

Apr 9 – 10, 2017Parks Canada
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Archivado · caducó 9 years ago

Peligro de aludes

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

The slopes look inviting but Jasper Forecasters are still leery of big slopes that have not seen ski traffic or previous avalanche activity. 

Problemas de aludes

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    2–3
    Cornice failure is hard to predict. Some very large cornices are out there so wise to give them a wide berth.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–3
    Isothermal conditions possible as melt freeze breaks down by late morning.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    2–4
    This problem will persist. Activity has subsided but, need to keep this on your radar. It can be triggered by large loads such as cornice failures or human triggered from shallow spots or steep unsupported slopes.

Weather Forecast

Melt-freeze cycle in the valley bottoms. Light winds and cool temps keeping the surface snow dry above tree-line. Pulses of precipitation (rain below tree-line and snow above) into the week.  Starting to see strong diurnal spring temperature cycle developing.

Snowpack Summary

Good skiing  above 2000m.  Icefields has10cm of settled storm snow. This rests on a solid mid-pack which bridges the weak base above 2000m. The base is a combination of weak facets and depth hoar mixed around a Nov rain crust. Consistent melt-freeze cycle below tree line. Surface crusts are breaking down by mid morning.

Avalanche Summary

A couple sz 3 avalanches in steep un skiable terrain NE alpine where cornice failure has triggered deep persistent slab.

Confidence

Timing or intensity of solar radiation is uncertain on Tuesday

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