Bulletin d’avalanche

South Rockies

Feb 15 – 16, 2013Avalanche Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Sun
Mon
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–3
    Hard windslabs may be found in unusual locations and might be more difficult than usual to identify.

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–4
    Cornice are well developed and may become unstable, particularly during windy, warm or sunny weather.

Confidence

Fair - Intensity of incoming weather is uncertain

Weather Forecast

Synopsis: A weak frontal system moves through the region on Saturday and is replaced by a ridge of high pressure.Saturday: 5-10 cm new snow. Ridgetop winds 40 km/h from the west, gusting to 60 km/h. Freezing level 2100 m.Sunday: Light snow, 2-5 cm. Possibly higher accumulations in the east. Light northwesterly winds. Freezing level 500 m.Monday: Dry. Light winds. Freezing level at valley bottom with treeline temperatures around -5C.

Avalanche Summary

A skier accidentally triggered a windslab on Wednesday. This avalanche had a crown from 30-60 cm thick.

Snowpack Summary

Warm temperatures have moistened the snow surface in many areas. As temperatures cool, expect it to harden into a crust. Wind slabs are extensive in exposed areas and cornices are reported to be well developed. A surface hoar/facet/sun crust layer from mid February (12th) may be buried in the top 20 cm or so, where it hasn't been blown away by the wind and is likely making some of the wind slabs more touchy. Mid and lower snowpack layers are generally well settled and stable.

Régions couvertes