Bulletin d’avalanche

Waterton Lakes

Jan 18 – 21, 2013Parks Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Fri
Sat
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Continued mild conditions.  Watch for rapid warming when the sun comes out. Good skiing in sheltered areas over the last several days.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    Use caution if you encounter wind slabs near ridge crests or in steep loaded terrain.  These are generally easy to spot at this time. 

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    With the recent NW winds and snow these have grown quickly and are now quite fragile.  Be especially cautious of cornice failures with warm temperatures and sun.

Weather Forecast

Continued mild weather with moderate W to NW winds in the alpine.  Little precipitation is expected over the next several days.

Snowpack Summary

Thin sun crust on steep S aspects. Wind slabs forming near ridge crests and in open areas at tree line and above from Moderate to Strong NW winds.  Below this is a well settled snowpack.  No significant shears found in test profiles over the past several days.  Still some concerns for facets in thin areas and cross loaded gully features.

Avalanche Summary

Several cornice failures have occurred over the last few days.  Some of these have triggered wind slabs up to size 2 in steep terrain.  One steep cross loaded NW facing gully feature released naturally today as a size 2.5 at about 2000m in a thin snow pack area.  Otherwise little natural activity has been observed over the last several days.   

Confidence

Régions couvertes