Boletín de aludes

South Rockies

Dec 7, 2017Avalanche Canada
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Archivado · caducó 9 years ago

Peligro de aludes

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

A rapid shift to warm, sunny conditions will increase the range of avalanche problems as well as their potential for reactivity.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–2
    A recent wind shift from southwest to north means that fresh wind slabs are likely to now exist on a wide range of aspects at higher elevations. Be especially cautious of reverse loaded or cross-loaded slopes that see sun exposure on Thursday.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    2–3
    There are several crusts now buried within the snowpack. Use extra caution in thin snowpack areas where it may be possible to trigger a deeper layer. Triggering a wind slab may also have the potential to step-down to a deeper layer.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–2
    Warm, sun-exposed slopes could produce wet loose avalanches either naturally or with rider triggers on Thursday, especially in steeper terrain.

Confidence

Moderate - Timing or intensity of solar radiation is uncertain

Weather Forecast

Thursday: Mainly sunny with valley cloud due to an alpine temperature inversion. Light northwest winds. Freezing level to around 3300 metres with alpine temperatures of +4. Cooler temperatures at lower elevations.Friday: Mainly sunny with some valley cloud due to lingering temperature inversion. Light west winds. Freezing level to about 3300 metres with alpine temperatures to +5. Cooler at lower elevations.Saturday: A mix of sun and cloud. Light west winds increasing in the afternoon. Freezing level to about 3300 metres with alpine temperatures of +4. Cooler at lower elevations.

Avalanche Summary

No new avalanches have been reported from this region. There is potential for triggering wind slabs on leeward and crossloaded slopes. Smaller avalanches may also step down and trigger larger avalanches on buried weak layers deeper in the snowpack. Please submit your observations to the Mountain Information Network.

Snowpack Summary

Average snowpack depths at upper elevations in the region range from about 50-100 cm. Shifting winds over the past few days have extended wind slab formation to a wide range of aspects at treeline and above. Below the surface, the two crusts that were buried near the end of November can now be found approximately 30 cm and 60 cm down. A third crust from the end of October exists as a "facet/crust" combo near the base of the snowpack. Snowpack testing in the adjacent Kananaskis Country forecast region has yielded hard but sudden results on this layer.

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