Boletín de aludes

Jasper

Dec 14 – 15, 2021
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Archivado · caducó 5 years ago

Peligro de aludes

Wed
Thu
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil

Lo esencial

New snow and winds overnight will increase the avalanche danger on Tuesday. Investigate slopes before committing to features.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1.5–2.5

    New snow and south winds will build new windslab in lee and crossloaded features. Watch for hollow sounds and cracking. Consider testing smaller slopes before committing to larger features; windslabs could initiate deep layers.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    2–3.5

    Triggering this layer would be a high consequence event - cautious decisions and thorough investigation is necessary. More likely to trigger this layer in transitions from thin snowpack to deeper loaded pockets or terrain features.

Weather Forecast

Tuesday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: High -8 C.

Ridge wind southwest: 15 km/h gusting to 40 km/h.

Wednesday

Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: Low -15 C, High -13 C.

Ridge wind southwest: 10-25 km/h.

Snowpack Summary

Winds have created isolated windslab near ridge top & in exposed terrain above treeline. The 30cm of new snow is bonding well. Mid snowpack has settled well with a 2cm rain crust present below the recent snow up to 1950m. Another crust near the base of the snowpack continues to promote basal faceting adding to our deep persistent slab concerns

Avalanche Summary

No new activity observed on the Icefields Parkway.

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Confidence

Forecast snowfall amounts are uncertain

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