Boletín de aludes

Jasper

Apr 11 – 12, 2017Parks Canada
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Archivado · caducó 9 years ago

Peligro de aludes

Thu
Fri
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
2 · Moderado
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Lo esencial

Rapidly changing hazard is a hallmark of spring skiing! Be aware of the potential changes that may effect your route over a whole day!

Problemas de aludes

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    2–3
    Cornice failure is hard to predict but likelihood increases with sun, warm temperatures, and wind-loading.There are some very large cornices out there. Wise to give them a wide berth.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–3
    Isothermal conditions are possible as crusts break down by late morning. Gauge the extent of the overnight freeze relative to how quick it will move into being reactive.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    2–4
    The deep instability could be triggered by large loads such as a cornice failure or a surface avalanche. Human triggering is most likely from shallow spots or on steep unsupported slopes.

Weather Forecast

A continued scattering of flurries through the forecast area. Forecast models calling for 10 cm but, it seems to be variable in both location and accumulation. Expect warm alpine temps near -3 with freezing levels rising to 1800m.

Snowpack Summary

Icefields has 10cm of soft snow on a solid mid-pack bridging the weak base above 2000m. The base is a combination of weak facets and depth hoar mixed around a Nov rain crust. A consistent melt-freeze cycle is occurring below tree line. Surface crusts are breaking down by mid morning.

Avalanche Summary

No new avalanches observed or reported

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Wednesday

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