Boletín de aludes

Lizard-Flathead

Mar 21 – 22, 2017Avalanche Canada
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Archivado · caducó 10 years ago

Peligro de aludes

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

Freezing levels and precipitation amounts are uncertain for Tuesday night. Watch for touchy wind slabs at higher elevations and stay aware of overhead hazards.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–2
    The incoming storm will likely form fresh wind slabs in the lee of exposed terrain.

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    2–4
    Warming and cornice falls are potential triggers for large avalanches on deep weak layers. Be aware of this as a potential overhead hazard when traveling at lower elevations.

Confidence

Moderate - Forecast snowfall amounts are uncertain on Wednesday

Weather Forecast

TUESDAY NIGHT: A short pulse of warm wet weather overnight will bring 10-15 mm of precipitation, strong southwest wind, and freezing level up to 2000 m.WENDESDAY: Cloudy with isolated flurries, strong southwest wins, freezing level dropping to around 1700 m.THURSDAY: Mix of sun and cloud, moderate southwest wind, freezing level around 1600 m with alpine temperatures around -5 C.FRIDAY: Increasing cloud, light wind, alpine temperatures around -1 C.

Avalanche Summary

A few small solar triggered avalanches were reported over the past few days, but there has not been any notable recent activity. A large avalanche cycle occurred during last weekend's storm, including some that stepped down to deeper weak layers well over a metre deep.New snow should form wind slabs at higher elevations, well warming and cornice falls are potential triggers for deep persistent slabs.

Snowpack Summary

Moderate amounts of alpine snow will form wind slabs at higher elevations on Tuesday night. Meanwhile at lower elevations, rain will once again soak the snowpack. A thick rain crust has formed near the surface at all elevations, but tends to break down with daytime warming at lower elevations and on solar aspects. Isolated basal facets exist in shallow snowpack areas and still have the potential to produce destructive full-depth avalanches.

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