Boletín de aludes

Jasper

Feb 4 – 5, 2021
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Archivado · caducó 6 years ago

Peligro de aludes

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

Lo esencial

Up to 60cm of new storm snow distributed through the forecast region.

Look carefully for signs of localized instability and wind effect before committing to big features.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2.5

    Light to moderate W through SW winds will transport snow into immediate lees in the alpine and, eventually exposed treeline features

  • Loose Dry

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

    Size and likelihood dependent terrain. Previous surface faceting could make this problem more reactive.

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2.5

    Soft slabs will continue to develop as the new load settles. The potential exists for avalanches to step down to deeper layers.

Weather Forecast

Tonight: Cloudy with clear periods, isolated flurries and a trace of new snow. Temp: -15 C. Ridge wind W: 15 km/h.

Thursday: Cloudy with flurries. Accumulation: 4 cm. Temp: High -9 C. Ridge wind west: 15-35 km/h.

Friday: A mix of sun and cloud with isolated flurries. Temp: Low -23 C, High -10 C. Ridge wind northwest: 15 km/h gusting to 50 km/h

Snowpack Summary

40-60cm of new storm snow appears to be bonding well to the old surface, on a mixed form/facet interface giving hard, sudden planar results in field tests at the Icefields. Soft-slab will continue to develop on all aspects and elevations as the snow settles. Mid-pack remains strong underfoot except in areas where the snowpack is less than 100cm.

Avalanche Summary

A determined avalanche control team worked hard Tuesday to produced a few good results, up to size 2.5 on a very stubborn storm interface in low elevation targets with several large triggers. A natural avalanche cycle continues with observed loose dry and soft slabs to sz 1.5 on many aspects.

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Confidence

Wind effect is extremely variable

Regiones cubiertas