Boletín de aludes

Northwest Inland

Feb 13 – 14, 2022Avalanche Canada
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Archivado · caducó 5 years ago

Peligro de aludes

Tue
Wed
Alta montaña
2 · Moderado
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil
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Lo esencial

Avalanches are unlikely in areas where a hard surface crust is present.

Small wind slabs may be found on lee features in the alpine; carefully evaluate steep lines for wind slabs. 

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–1.5

    Small wind slabs may be found on lee features in the alpine. 

    Larger wind slabs may exist in the north of the region at upper elevations where the intense rain on Wednesday fell as snow.

    Cornices overhead are a primary concern during sunny, warm, or windy conditions. Cornice failures may trigger very large persistent slab avalanches that would otherwise be difficult to trigger.

Confidence

High -

Weather Forecast

SATURDAY NIGHT: Partly cloudy / Light, northwest wind / Low of -7 / Freezing level surface.

SUNDAY: Mostly cloudy with flurries; 0-3 cm, with another 5-10 cm overnight / Light, southwest wind / High of -2 / Freezing level 700 m.

MONDAY: Mix of sun and cloud / Moderate, northwest wind / High of -2 / Freezing level 800 m.

TUESDAY: Cloudy with flurries; 3-5 cm / Strong, northwest wind / High of -3 / Freezing level 500 m.

Avalanche Summary

No new avalanches were reported on Friday.

Snowpack Summary

5-10 cm of wind-pressed snow overlies a thick (10-15 cm) rain crust that extends to mountain-tops. This crust has created challenging travel conditions and a "slide-for-life" hazard on steep slopes.

Small wind slabs may be found on lee features in the alpine. 

The weak layers deeper in the snowpack are unlikely to human trigger in areas where a hard surface crust is present.

 However, cornices overhead are a primary concern during sunny, warm, or windy conditions. Cornice failures may trigger very large, persistent slab avalanches that would otherwise be difficult to human trigger.

Terrain and Travel

  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.
  • A crust on the surface will help bind the snow together, but may make for tough travel conditions.
  • Carefully evaluate steep lines for wind slabs.
  • Avoid exposure to slopes that have cornices overhead.
  • Cornice failures could trigger very large and destructive avalanches.

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