Bulletin d’avalanche

Banff Yoho Kootenay

Feb 2 – 3, 2014Parks Canada
Voir sur la carte
Archivé · expiré 13 years ago

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
Ouvrir la carte complète

Points saillants

Good skiing West of the divide in sheltered areas.  Avoid thin areas in big alpine features as the basal layer can still be triggered.  SH

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Places which have a well defined sun crust will be the most susceptible to triggering a storm slab.  At the moment these are of lower consequence and thin (15-30cm) and isolated to specific terrain features.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–3
    Thin snowpack areas in steep, alpine terrain will be the place to trigger the basal depth hoar/crust. 

Weather Forecast

Light N winds Sunday with a mix of sun and cloud and a trace of snow. Temperatures will again be in the minus 20's in the mornings, and highs in the -10 to -15C range.

Snowpack Summary

5-15cm of snow over the Jan 30th surface hoar/sun crust layer. Surface hoar most prominent at treeline and below. In Yoho today, thin wind slabs (15cm) over 5cm sun crust on steep S aspects reactive to skier triggering. The basal facets remain weak, but the overall snowpack is gaining strength. Glacial coverage very thin for this time of year.

Avalanche Summary

One size 2 natural cornice triggered avalanche on a SE aspect in Yoho occurred within the last 48 hours.  This was a thin slab in extreme terrain.

Confidence

on Sunday

Régions couvertes