Boletín de aludes

Northwest Inland

Apr 13 – 14, 2022Avalanche Canada
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Archivado · caducó 4 years ago

Peligro de aludes

Fri
Sat
Alta montaña
2 · Moderado
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil

Lo esencial

Carefully assess your line for wind slab hazard. Remember that small avalanches can have large consequences in the wrong terrain.

Cornices are large and exposure to them should be minimized, especially during warm or sunny weather.

Problemas de aludes

  • Wind Slabs

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

    Recent outflow wind has left slabs on west and south-facing slopes in the alpine. Be cautious around ridge crests and steep rolls.

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1.5–3

    Cornices are large this time of year and may have been weakened by recent cold temperatures. Exposure to cornices should be minimized, especially during periods of warm temperatures or strong sun.

Confidence

Moderate - Uncertainty is due to the timing or intensity of solar radiation and its effect on the snowpack.

Weather Forecast

WEDNESDAY NIGHT: Mainly clear, no precipitation. 25-40 km/h wind from the northeast, treeline temperatures drop to -14 C.

THURSDAY: Sunny, no precipitation. Light wind from the northeast, treeline temperatures reach -3 C.

FRIDAY: Mainly sunny, some high cloud, no precipitation. Light wind from variable directions, treeline temperatures reach -5 C.

SATURDAY: Mainly clear, no precipitation. Light variable wind, treeline temperatures reach -3 C.

Avalanche Summary

No notable avalanche activity has been reported since last Friday, but reports of blowing snow on Monday and Tuesday suggest wind slabs have formed at upper elevations.

Snowpack Summary

Open terrain has been wind-affected, with recent wind scouring southeast slopes and loading snow onto east and north-facing slopes. Sheltered areas may still have soft snow. A widespread melt-freeze crust can be found 20 to 50 cm deep in most areas, and up to 80 cm in the snowiest parts of the region. This crust is near the surface below 1200 m.

Terrain and Travel

  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
  • Back off if you encounter whumpfing, hollow sounds, or shooting cracks.
  • Avoid exposure to slopes that have cornices overhead.
  • Cornices often break further back than expected; give them a wide berth when traveling on ridgetops.
  • As surface loses cohesion due to melting, loose wet avalanches become common in steeper terrain.

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