Boletín de aludes

Banff Yoho Kootenay

Feb 10 – 11, 2015Parks Canada
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Archivado · caducó 12 years ago

Peligro de aludes

Tue
Wed
Alta montaña
4 · Fuerte
Límite del bosque
3 · Notable
Bajo el límite
3 · Notable
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Lo esencial

Avalanche control will be conducted on Mt. Stephen, Mt. Dennis, and on Mt. Hector on Tuesday. Please no skiing or climbing in these areas.

Problemas de aludes

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely - Very Likely
    Tamaño
    2–3
    Fifty to 90 cm of storm snow exist on the January 30th crust interface. A poor bond exists at this interface and large avalanches have been observed running on this layer. Huge propagations are still possible.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    2–3
    A weak temperature crust overlies isothermal conditions at treeline and below elevations. Many loose wet avalanches that have gouged down to ground have been observed in past 48 hours.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    2–3
    The base of the snowpack remains weak due to basal depth hoar/facets. Additional snow load, or a storm slab failure may trigger large to very large avalanches in thin snowpack areas.

Weather Forecast

A weak freeze overnight with freezing levels rising to 1800m on Tuesday. Some flurries forecasted but little in the way of accumulation.

Snowpack Summary

45 - 70 cm of recent storm overlies a crust from January 30th. The recent heavy precipitation, and warmer temperatures have created very touchy storm slabs over top of the January 30th crust interface.  Despite a weak freeze last night isothermal conditions persist at treeline and below.

Avalanche Summary

Avalanche control over the past three days in Banff, Yoho Park and Koorenay Park have produced numerous avalanches up to size 3. Many of the avalanches started dry and turned wet at lower elevations. Also, evidence of a widespread cycle up to size 3.5 throughout the forecast region. Some avalanches running close to full path.

Confidence

Freezing levels are uncertain

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