Boletín de aludes

Jasper

Mar 19 – 20, 2014Parks Canada
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Archivado · caducó 13 years ago

Peligro de aludes

Fri
Sat
Alta montaña
3 · Notable
Límite del bosque
3 · Notable
Bajo el límite
2 · Moderado
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Lo esencial

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2
    With lots of snow available for transport, we suspect recent windslab formation in the alpine in exposed areas.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–3
    The "drought layer" (Feb 10) has been sensitive in the past week, contributing to numerous large avalanches. Pay particular attention to moraines at treeline and crossloaded features in the alpine.

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–3
    35cm of recent snow is settling rapidly. Although this snow appears to be bonding well, caution is warranted in steep terrain. It is a good idea to test the storm snow interface prior to committing to your line.

Weather Forecast

Snowfall starting Wednesday night, continuing through the weekend, reaching 25cm in both the Maligne Lake area and Columbia Icefields area by Sunday night.  Winds to remain relatively light but shifting in direction. Temps cool with good overnight recovery and freezing levels remaining below 1000m. 

Snowpack Summary

30cm settled storm snow over a variety of surfaces.  Drought layer (Feb 10) down 50-80cm. Lots of snow available for transport, and some moderate ridge top transport observed today. 

Avalanche Summary

Field patrols in the past few days observed the debris from numerous large avalanches. These avalanches exhibited wide propagation, were primarily found in big East facing alpine terrain, and several were triggered by cornice fall. As the wind begins to push the recent snow around, the likelihood of triggering new slabs will increase.

Confidence

Due to the number of field observations

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