Boletín de aludes

South Rockies

Feb 24 – 25, 2022Avalanche Canada
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Archivado · caducó 5 years ago

Peligro de aludes

Sat
Sun
Alta montaña
2 · Moderado
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil
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Lo esencial

Pockets of wind slab likely linger on various aspects in exposed terrain and around ridgelines. 

Recent northeast winds have reverse loaded features building slabs in less common places.

Problemas de aludes

  • Wind Slabs

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

    Watch for pockets of wind slab on various aspects in exposed terrain and around ridgelines. Recent northeast winds have reverse loaded features building slabs in less common places. Alpine features are the most likely culprits, but exercise some caution in exposed treeline features with stiff snow as well.

    These slabs have formed on top of old crusts and hard wind-pressed snow and there is uncertainty about how quickly they will bond to old surfaces. 

Confidence

High -

Weather Forecast

WEDNESDAY NIGHT: Trace of new snow, light northeast winds. Alpine low of -20. 

THURSDAY: Partly cloudy with light northwest winds. Alpine high of -10.

FRIDAY: Sunny with a few clouds, light southwest winds increasing to moderate later in the day. Alpine highs of -10.

SATURDAY: Mostly sunny, moderate southwest winds, alpine high of -5.

Avalanche Summary

On Tuesday the field team reported evidence of a natural wind-driven avalanche cycle (likely from Monday), with avalanches in the size 1-2 range in the northern Elk Valley. On the east slope of the divide dry loose avalanches and small wind slabs have been reported.

Snowpack Summary

The 10-20 cm of most recent snow has been redistributed by moderate to strong northeast winds and formed some wind slabs in unusual places. This latest load sits over old firm wind-affected snow in open areas and hard sun crusts on solar aspects.

The snowpack below is generally well consolidated, with a crust/facet layer found near the bottom of the snowpack. It is currently considered dormant but could become active later this season. Check out the forecaster blog for more information. 

Terrain and Travel

  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Be alert to conditions that change with elevation and wind exposure.

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