Boletín de aludes

Jasper

Feb 7 – 8, 2019Parks Canada
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Archivado · caducó 8 years ago

Peligro de aludes

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

Human triggering remains a possibility. Assess the stability before committing to avalanche terrain.

Problemas de aludes

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2.5
    Up to 50cm of recent snow followed by strong winds has built thick slabs. 

  • Loose Dry

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–1.5
    Expect sluffing out of steep rocky terrain if the sun is on it.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1.5–3.5
    New snow with strong winds recently overloaded the deep persistent weakness in shallow snowpack areas.

Weather Forecast

Thursday will be mainly cloudy with isolated flurries, trace snow, alpine temperature high -15 C, and 10km/hr west ridge winds. Friday will be cloudy with sunny periods and isolated flurries, alpine temperatures Low -31 C and High -16 C, and light East ridge winds. A detailed mountain weather forecast is available from Avalanche Canada.

Snowpack Summary

50cm from Feb 2nd was followed by strong Northerly winds. This snow overloaded; the Jan 18 persistent weaknesses such as surface hoar 10mm in sheltered areas at lower elevations, crust on steep solar slopes, and facets on Northerly alpine slopes; and the deep persistent basal facet and depth hoar weakness - particularly in shallow snowpack areas.

Avalanche Summary

Feb 4th avalanche control work at the Icefields produced several large size 2-2.5 persistent and deep persistent slab avalanches. A natural cycle of large slab avalanches occurred during this last storm but activity has tapered off.Help forecast - share observations HERE, on the Mountain Information Network!

Confidence

Due to the number and quality of field observations

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