Bulletin d’avalanche

Kootenay Boundary

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

Danger d’avalanche

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

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–4
    Watch for new wind slab formation in exposed terrain in both the alpine and treeline elevation bands.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–5
    This layer may increase in reactivity at higher elevations with forecast inversions. Slopes that didn't slide during the last cycle are of particular concern. Make conservative terrain choices, particularly if significant warming develops.

Confidence

Fair - Due to variable weather conditions for the entire period

Weather Forecast

Mainly clear skies are expected until Friday. Winds are forecast to be strong from the northwest. Freezing levels are forecast to rise to about 1100m each day with the possibility of temperature inversions throughout the period.

Avalanche Summary

No new avalanches have been reported from the region.

Snowpack Summary

Recent winds have formed thin windslabs in open alpine and treeline features.Under this new wind slab ~65cm of settled snow rests on the January 4th interface which consists of small facets, surface hoar (up to 12mm) in sheltered treeline and below treeline areas, and a sun crust on steep solar aspects. The layer is still reactive in test pits, but has not been reactive to human triggering in recent days.The midpack is well bonded and strong. The November 28 surface hoar is still being found in isolated, sheltered below treeline locations buried 120cm. The deep crust/facet combo from early November still exists but seams to be dormant for the time being.

Régions couvertes