Boletín de aludes

South Rockies

Jan 16 – 17, 2013Avalanche Canada
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Archivado · caducó 14 years ago

Peligro de aludes

Fri
Sat
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
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
    Likely
    Tamaño
    1–4
    Strong northwest winds are expected to form new windslabs. Watch for loading in unusual locations. Cornices are also large and potentially unstable.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–5
    Slopes that didn't slide in the last avalanche cycle are of particular concern. Watch for triggering on unsupported terrain.

Confidence

Fair - Due to variable snowpack conditions

Weather Forecast

A mix of sun and cloud is expected for the forecast period. Extreme northwest winds are expected to ease to strong on Friday, and then become light on Saturday. The possibility of an inversion will exist throughout the period; however, alpine temperatures should stay below freezing.

Avalanche Summary

No new significant avalanche observations have been reported from the region.

Snowpack Summary

Light amounts of loose snow may overlie windslabs which exist in unusual locations due to strong northwesterly winds. Below this around 60cm of settled snow rests on a myriad of old surfaces that were buried on January 4th. These surfaces include a sun crust on steep solar aspects, surface hoar in sheltered locations at treeline and below, and facets everywhere else. The bond at this interface seems to have strengthened somewhat with time. The overlying slab has also settled significantly.The midpack is reportedly well settled and strong with one or two (location specific) crusts deep in the snowpack. These crust/facets combos are largely dormant, with the only concern being triggering from a shallow snowpack area or with a heavy trigger.Cornices in the region are reported to be large and potentially unstable.

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