Bulletin d’avalanche

South Coast Inland

Feb 23 – 24, 2023Avalanche Canada
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Archivé · expiré 4 years ago

Danger d’avalanche

Sat
Sun
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Wind slabs are the main concern. Keep in mind you may find them on a variety of aspects with winds switching direction.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2.5

    Recent new snow combined with moderate wind from a variety of directions has promoted new wind slab formation on a variety of aspects.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–3.5

    A layer of weak facets sits near the base of the snowpack. This layer is most likely to be problematic in steep, unsupported, wind-loaded terrain in the northern part of the region around the Chilcotins.

Confidence

High

Avalanche Summary

On Tuesday there were reports of a few size 2.5 naturally triggered windslab avalanches on northerly and southerly aspects in the alpine in the Birkenhead area and in the south Chilcotin.

Snowpack Summary

Recent new snow accumulation is being redistributed by moderate southwest winds switching to north and northeast.

A melt-freeze crust from late January can found down 60-80 cm. At the moment this layer appears to be gaining strength though in isolated areas small facets can still found above the crust.

There is a widespread weak layer of large sugary of facets at the bottom of the snowpack. Recent avalanche activity on this layer has been confined to northern parts of the region in the Chilcotins. Snowpack depths around treeline range between 150 to 250 cm.

Weather Summary

Wednesday Night

Cloudy with clear breaks. Light to moderate north east. Treeline temperature -20 °C.

Thursday

Mix of sun and cloud. Moderate north east wind. Treeline temperature -18 °C.

Friday

Mix of sun and cloud. Light northeast wind. Treeline temperature -16 °C.

Saturday

Mainly cloudy with flurries. Moderate southwest wind. Treeline temperature -8 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be especially cautious as you transition into wind affected terrain.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • In areas where deep persistent slabs may exist, avoid shallow or variable depth snowpacks and unsupported terrain features.

Régions couvertes