Boletín de aludes

Northwest Inland

Dec 23 – 24, 2023Avalanche Canada
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Archivado · caducó 3 years ago

Peligro de aludes

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

Wind slabs may have formed at higher elevations, approach ridgelines and mid slopes rollovers with caution.

Problemas de aludes

  • Wind Slabs

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

    Recent storm snow has formed wind slabs in exposed terrain. Slabs may be small but reactive to human triggers.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2.5

    Buried surface hoar can be found 30-50 cm below the snow surface. It is reported to be deeper and more reactive in the western part of the region.

Confidence

Moderate

Avalanche Summary

No recent avalanches have been reported, we expect some natural avalanche activity may have occurred during the storm.

If you do go into the backcountry, consider submitting a Mountain Information Network report.

Snowpack Summary

10-20 cm of storm snow has fallen over previously wind-affected surfaces at higher elevations.

Lower elevations received mostly rain and are likely to have moist snow or a surface crust.

Two different surface hoar layers have been reported in the upper snowpack (up to 40 cm deep) and appear to be most prominent at treeline and below. Snowpack depths at treeline are 50 to 100 cm.

Weather Summary

Friday Night

Cloudy with flurries, westerly winds 20-40 km/h. Freezing levels at valley bottom.

Saturday

Mainly cloudy with possible flurries, southerly winds 50 km/h. Freezing levels rise to 500 m, treeline temperature -5 °C.

Sunday

Mainly cloudy with southerly winds, 60-90 km/h. Freezing levels remain around 500 m. Treeline temperatures near -5 °C.

Monday

A mix of sun and cloud with southerly winds, 60-80 km/h. Freezing levels rise towards 1000 m, treeline temperatures around -2 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully assess open slopes and convex rolls where buried surface hoar may be preserved.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.
  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.

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