Lawinenlagebericht

Purcells

Dec 21 – 22, 2014Avalanche Canada
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Archiviert · abgelaufen 12 years ago

Lawinengefahr

Tue
Wed
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
2 · Mässig
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Kernpunkte

Have a safe and fun holiday.

Lawinenprobleme

  • Storm Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–3
    Recent new snow has built up over a touchy layer of buried surface hoar crystals.

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    2–5
    In some parts of the region, large avalanches have been failing on a deeply buried weak layer.

Confidence

Fair - Intensity of incoming weather systems is uncertain

Weather Forecast

On Monday, expect flurries or light snow with light to moderate NW winds. Freezing levels are expected to gradually drop to near valley floor by Tuesday. A second storm system is due to arrive some time on Tuesday, bringing snow (around 5-10cm).

Avalanche Summary

On Saturday, explosives triggered size 2-2.5 slabs at the northern end of the Purcells. These are suspected to have failed on the lower layer of surface hoar, and in isolated spots stepped down to the early November crust. Smaller slabs were also failing on the most recently buried layer of surface hoar. A size 2.5 naturally-triggered slab was observed at 2600m on an east aspect on Friday.

Snowpack Summary

Recent storm snow sits above two layers of surface hoar in the upper snowpack. The more recent of these sits on a crust below about 2100m, and on settled snow at higher elevations. A hard rain crust with facets from early November is buried over 1 m down and is still reactive to light loads in some locations.

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