Boletín de aludes

Northwest Inland

Dec 13 – 14, 2019Avalanche Canada
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Archivado · caducó 7 years ago

Peligro de aludes

Sun
Mon
Alta montaña
2 · Moderado
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil

Lo esencial

Enough snow may be accumulating to form wind slabs at higher elevations. Watch for signs of instability such as whumpfing, cracking, and recent avalanches.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2

    Recent snow could be forming wind slabs in the alpine and near ridgetops.

Confidence

Moderate - Forecast snowfall amounts are uncertain.

Weather Forecast

THURSDAY NIGHT: Scattered flurries with 5-10 cm of new snow, 30 km/h wind from the west, alpine high temperatures drop to -8 C.

FRIDAY: Isolated flurries with up to 5 cm of snow, light wind from the northwest, alpine high temperatures around -5 C.

SATURDAY: Mix of sun and cloud, light wind from the northwest, alpine high temperatures around -8 C.

SUNDAY: Mix of sun and cloud, 40 km/h wind from the northwest, alpine high temperatures around -10 C.

Avalanche Summary

MIN reports from the weekend suggest there has been minimal avalanche activity over the past week. No significant activity is expected until sufficient snow buries the surface hoar layer that formed this week.

Snowpack Summary

Light accumulations of snow over the next few days will bury a concerning layer of surface hoar that has formed in areas sheltered from the wind (see photos in this MIN report). By Friday afternoon there could 10-20 cm of fresh snow above this layer, which is probably not enough to form a slab above this layer (except for deeper wind deposits). Reports suggest this surface hoar layer can be found on all aspects up to treeline elevations. In the alpine, new snow will bury hard wind slabs and sun crusts on south-facing terrain. Snowpack depths are 50-100 cm in alpine areas around Smithers, with depths diminishing rapidly below 1500 m. The relatively thin snowpack has likely caused soft weak snow to form near the ground, however triggering an avalanche on weak basal snow is unlikely under the current conditions.

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