Boletín de aludes

Jasper

Jan 26 – 27, 2014Parks Canada
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Archivado · caducó 13 years ago

Peligro de aludes

Sun
Mon
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
2 · Moderado
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Lo esencial

Select conservative lines as the underlying basal weakness is not going away anytime soon.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1–2
    Recent small wind slabs in loaded terrain features released on solar aspects and stepped down to the weak facet creating a full depth avalanche. Watch for wind loaded pockets over unsupported terrain such as between pitches of an ice climb.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    2–3
    A supportive slab over a shallow spot in the snowpack could provide the energy for a small avalanche to step down into this layer.

Weather Forecast

A small front will pass through in the next day bringing cloudy periods and light snow flurries. Temperatures are expected to cool overnight and remain below 0 during the day at treeline and above. Another system is expected to develop by mid week which will bring a mixture of sun and cloud with only light snowfalls into the weekend.

Snowpack Summary

A shallow and weak snowpack sits on 10-20cm of basal facets.  Previous wind slabs provide bridging strength to the snowpack above treeline and into the alpine. Extensive scouring in the high alpine. Clear skies and light winds have developed surface hoar at all elevations leading to another weak layer in the future.

Avalanche Summary

No new avalanches were observed on Saturday. Friday's field patrols observed three size 1.5 to size 2 slabs on solar aspects in the alpine.

Confidence

Timing or intensity of solar radiation is uncertain

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