Bulletin d’avalanche

Sea To Sky

Feb 3 – 4, 2012Avalanche Canada
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Archivé · expiré 15 years ago

Danger d’avalanche

Sun
Mon
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–4
    Warm temperatures are expected to continue to settle and bond recent windslabs in the alpine and at treeline. Some pockets of dry snow on shaded slopes may be reactive as freezing levels rise.

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely - Very Likely
    Taille
    2–6
    New cornice growth may be easy to trigger due to rising temperatures and solar radiation. Cornice falls may trigger slabs on the slopes below.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–6
    Steep solar aspects may be easily triggered or run naturally due to above freezing temperatures overnight combined with daytime heating. Avalanches may run full path and entrain moist snow in the track.

Confidence

Good - -1

Weather Forecast

Warm daytime temperatures and freezing down to the valley bottoms is expected over the weekend. The freezing level is forecast to rise to about 2000 metres on both Saturday and Sunday. Expect mostly sunny skies and light south to southeast winds through the forecast period.

Avalanche Summary

Some sloughing from steep shaded aspects in the alpine to size 1.0. Also, moist surface snow releases up to size 1.0 on solar aspects.

Snowpack Summary

Recent strong southerly winds have created soft windslabs in the alpine and at treeline that are settling and bonding due to the warm temperatures. Pockets of dry snow in the alpine may become active with the initial warming. Some sun crust is developing on steep solar aspects. Shallow rocky areas continue to be a concern due to the formation of weak buried facets. Surface instabilities, cornice releases, or other large loads may trigger deep buried weak layers; this is a low probability, high consequence situation.

Régions couvertes