Bulletin d’avalanche

Banff Yoho Kootenay

Mar 6 – 7, 2013Parks Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Wed
Thu
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

A few more days of conservative terrain choices would be a good idea. This will allow the recent storm snow to bond to the older surfaces.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    2–3
    60 cm of recent storm snow has created unstable storm snow conditions. The natural cycle is over and cooler temperatures have tightened up the upper pack, however we still expect to see touchy storm slab conditions over the next few days.

Weather Forecast

A rather benign weather pattern for the next few days will bring light winds to the alpine, no precipitation, and moderate diurnal fluctuations in temperatures (alpine highs of -10*, lows of -15*)

Snowpack Summary

Up to 60 cm of storm snow since Friday has settled to 30-40 cm. Cool temperatures have tightened the upper pack and promoted bonding within the storm snow and on the storm snow interface, however we still expect to see storm slabs that are reactive to skier triggering in steeper alpine terrain.

Avalanche Summary

Evidence of a wide-spread natural cycle up to size 3 (at treeline and above elevations) in the storm snow from previous 72 hours. Several avalanches (up to size 2.5)  observed from past 36 hours along Highway 93 North and South (all in the alpine)

Confidence

Régions couvertes