Boletín de aludes

Kitimat

Dec 28 – 29, 2023Avalanche Canada
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Archivado · caducó 3 years ago

Peligro de aludes

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

Wind slabs are the main problem at upper elevations. Uncertainty remains around the reactivity of buried weak layers lingering in sheltered areas around treeline.

Problemas de aludes

  • Wind Slabs

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

    Recent winds have shifted from southwest to southeast, forming wind slabs on a variety of aspects.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    2–3

    Last week, large avalanches were running on layers of surface hoar now around 1 m deep. Although reactivity has seemed to subside, continue to approach sheltered slopes at and below treeline with caution for now.

  • Loose Wet

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

    Loose wet avalanches will become increasingly likely at elevations where precipitation falls as rain.

Confidence

Moderate

Avalanche Summary

On Tuesday, between Terrace and the coast, numerous naturally triggered storm slab and wet loose avalanches were reported at treeline and below.

On Monday, in the Shames backcountry, sounds of large avalanches in big terrain were reported. See this MIN post for more details of what sounded like a soggy day.

If you head into the backcountry please consider sharing your observations to the Mountain Information Network!

Snowpack Summary

Incremental snowfall continues to accumulate daily. At treeline and below, the upper snowpack is wet and/or crusty. At upper elevations, strong southwest to southeast winds have formed wind slabs in exposed leeward terrain, while scouring windward slopes.

Two buried layers of surface hoar are widespread in the mid snowpack, buried 50-100 cm, and 90-130 cm deep. The remaining mid and lower snowpack contains several well-bonded crusts. Snow depths are highly variable depending on elevation, and decrease rapidly below treeline.

Weather Summary

Wednesday night

Cloudy with flurries up to 5 cm. Moderate southeast wind. Freezing level 500 m, up to 1800 m near coastal inlets.

Thursday

Cloudy with snow flurries turning to rain below 1500 m; 5mm for most areas, 15mm west of Kitimat. Moderate to strong southeast wind. Treeline temperatures around 1 °C.

Friday

5-10 mm of rain below 1800 m. Strong southeast wind. Treeline temperatures around 3 °C.

Saturday

10-20 mm of rain below 1800 m. Moderate southerly wind. Treeline temperatures around 3 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Approach lee and cross-loaded slopes with caution.
  • Carefully assess open slopes and convex rolls where buried surface hoar may be preserved.
  • As surface loses cohesion due to melting, loose wet avalanches become common in steeper terrain.

Regiones cubiertas