Bulletin d’avalanche

Kananaskis

Dec 26 – 27, 2016Alberta Parks
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Archivé · expiré 10 years ago

Danger d’avalanche

Tue
Wed
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Don't let a lack of natural activity fool you into trusting the snow pack. The Dec 18th layer is going to linger for a long time yet! Sheltered areas at treeline will be the best bet for decent skiing.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–3
    These are growing with the wind transport lately. A lack of natural activity suggests we are still in the human triggering range. Avoid loaded areas near ridges and overhead terrain.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely - Very Likely
    Taille
    1–2
    These are ongoing in very steep, high alpine terrain. Climbers should take note! They may run into skiable terrain and they may become more frequent as the winds pick up.

Weather Forecast

Continued winds overnight tonight. Ridge top winds will be from the west and average about 45km/hr. Tomorrow will be similar to today. -13 as a high, no new snow and still windy (40-50km/hr) up high.

Avalanche Summary

Nothing new today

Confidence

High -

Snowpack Summary

Up to 20cm of recent snow throughout the region. Below treeline this has helped the travel conditions slightly, but not enough to recommend valley bottom travel as a trip in itself. Treeline is where the difference is felt. Where the wind hasn't touched the snow, there is the new surface snow with little structure beneath it. Where the wind has gotten to it, there is a denser layer on top of the weak mid pack. It gives an "upside down" feel while skiing. This upside down snow doesn't pose an avalanche problem until open areas at treeline, where it has more of a slab character. There is a mix of surface slabs and buried slabs that all sit on the Dec 18th facet layer. The upper ranges of treeline and alpine elevations all remain variable with almost immediate transitions between soft snow and windslab. These "laminated" slabs are up to 60cm thick and are more common in wind prone areas and below cliffs. In many alpine areas the wind slabs can be extremely dense and may propagate further than expected.

Régions couvertes