Boletín de aludes

Kootenay Boundary

Feb 17 – 18, 2014Avalanche Canada
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Archivado · caducó 13 years ago

Peligro de aludes

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

Problemas de aludes

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    3–5
    There are several buried crusts and or surface hoar layers that developed in the end of January and during the cold weather earlier this month. Avalanches releasing on these layers may be large with serious consequences.

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    2–4
    Variable new snow amounts across the region have developed a storm slab that is between 40-70 cm. The storm slab may be triggered by light additional loads or remote triggered from adjacent terrain.

Confidence

Fair - Timing, track, or intensity of incoming weather system is uncertain

Weather Forecast

Overnight and Tuesday: Precipitation is expected to end overnight after a few more cm of snow falls above 1000 metres elevation. Winds becoming very strong and gusty in the afternoon as the next Pacific system moves in quickly from the South Coast bringing 10-15 cm.Wednesday: Snow ending by morning as the winds become light Westerly and the freezing level lowers to about 800 metres.Thursday: Overcast with flurries and light Southwest winds.

Avalanche Summary

No new reports of avalanche activity. I suspect easy triggering in and below the storm slab of 50-80 cm.

Snowpack Summary

10-30 cm of new snow combined with strong Southwest winds overnight, brings the storm snow up to 50-80 cm. Below the storm snow there is about 20 cm of snow from last week that buried the late January layer of crusts and/or facets and surface hoar. This persistent weak layer from Late January continues to be the sliding layer for natural and human triggered avalanches. The mid snowpack is well settled and strong. The deeply buried weak layers of early season facets and depth hoar have been dormant, but they may become reactive with the right combination of added load and warm temperatures. The forecast new snow and wind are expected to add to the load above the late January weak layer, and may result in avalanches running naturally or increased sensitivity to human triggers at this interface.

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