Bulletin d’avalanche

North Columbia

Dec 3 – 4, 2021Avalanche Canada
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Archivé · expiré 5 years ago

Danger d’avalanche

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

Points saillants

Recent strong Southwest winds have created widespread wind slab in the alpine and upper treeline. carefully assess the wind slab hazard as you gain elevation.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1.5–3

    Large wind slabs will be found in the alpine and upper treeline. These slabs will remain sensitive to rider traffic. Avoid wind loaded terrain.

Confidence

Moderate -

Weather Forecast

Thursday night: Freezing levels will fall to valley bottom. No precipitation is expected. Winds will be moderate from the West in the Alpine.

Friday: A ridge of high pressure will mean clear skies and light alpine winds. Freezing level will be at valley bottom.

Saturday: Temperature at 1500m -10. moderate to strong winds from the Northwest. 

Sunday: high of -10 at 1500m, moderate winds from the Northwest in the alpine. No snow expected.

Avalanche Summary

On Wednesday several operations reported a widespread natural cycle up to size 3.5 including avalanches running full path.

Snowpack Summary

Recent strong winds have formed wind slab in all exposed terrain in Alpine and upper treeline. A new crust has formed below 2000m with moist snow underneath.

The average snowpack depth at treeline is 250cm.

Terrain and Travel

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.

Régions couvertes