Boletín de aludes

Jasper

Dec 13 – 14, 2021
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Archivado · caducó 5 years ago

Peligro de aludes

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

Lo esencial

Fresh windslab development at upper elevations warrants caution as the new snow continues to settle. Great skiing can be found in sheltered areas at tree line and below. 

Problemas de aludes

  • Wind Slabs

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

    New snow and moderate to strong SW winds building 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.

  • Loose Dry

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–2

    Heavy down flow observed in the Wilson region. Ice Climbers, avoid all overhead exposure.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    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

Tonight- Isolated flurries with trace precipitation. Alpine temp low -14 C. Wind S 15-30 km/h

Mon- Cloudy with sunny periods & isolated flurries. Trace precipitation. Alpine high -10 C. Wind SE 10-30 km/h

Tues- Flurries. Alpine temp low -17. Light ridge wind

Wed- A mix of sun & cloud. No Precipitation. Alpine temperature low -18. Wind W 10-25 km/h

Snowpack Summary

30cm of new snow in the past 36h with moderate SW wind has created new windslab near ridge top & in exposed terrain above treeline. Mid snowpack has settled well with a weak rain crust present below the recent snow upto 1800m. 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 icelfields parkway today with limited alpine visibility.

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Confidence

Due to the number of field observations

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