Boletín de aludes

Banff Yoho Kootenay

Nov 25 – 26, 2012Parks Canada
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Archivado · caducó 14 years ago

Peligro de aludes

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

There is just enough load on the November 6 crust which is down approximately 40-60 cm to become a danger for triggering. Use caution and avoid very steep lee slopes particularly just at treeline. JBW

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–3
    20-40 cm thick soft and hard slabs, reactive to explosives and ski cuts and restricted mostly to immediate lee of ridge crests or in open areas Slab was stiffer today with longer propagations, but still in the size 2 range.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–3
    The load on this layer is in the critical range. Open areas at treeline have just enough stiffness in the slab to have the potential for deep triggering and propagation. Several Na, skier and explosive avalanches up to size 2 in the last 36 hrs.

Weather Forecast

The forecast calls for mainly sunny weather over the next few days with high pressure ridging and some convective showers. The main storm energy will be to the south. The winds will be westerly and still moving snow

Snowpack Summary

Up to 60 cm storm snow over the past 5 days has settled into a soft slab approximately 30-40 cm thick. In open areas wind has blown the storm snow into a soft slab with wind slabs on north and east aspects. Nov. Cr down 40-60 now.

Avalanche Summary

Several Na out of steep terrain in the alpine during the storm up to size 2.5, some failing on Nov. Cr and some on storm snow. Avalanche control today produced up to size 2 slabs as much as one metre deep in lee areas.

Confidence

Due to the number of field observations

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