Lawinenlagebericht

Kananaskis

Jan 5 – 6, 2017Alberta Parks
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Archiviert · abgelaufen 10 years ago

Lawinengefahr

Fri
Sat
Hochgebirge
3 · Erheblich
Waldgrenze
2 · Mässig
Unterhalb
1 · Gering
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Kernpunkte

Good skiing is becoming hard to find. Sheltered areas at treeline are the best bet for decent snow. It is out there...it just takes some searching.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–2
    These vary in thickness and density. Recent reverse loading has put them in unexpected terrain.

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    2–3
    Activity on this layer indicates it is still easily triggered. There is potential for wide propagations, especially in steep terrain. Use your probe to help find and track the weakness.

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    2–3
    Thin spots will be the likely trigger point. Depth hoar below hardslabs deserves some caution. Also, the surface slabs may step down to this layer.

Confidence

High -

Weather Forecast

Mainly cloudy with isolated flurries tomorrow. Alpine low of -18. Winds will be westerly and up to 20km/hr.

Avalanche Summary

We saw three avalanches today. All in the alpine on east aspects and up to sz 2.5. Interestingly, they were all mid slope and in skiable terrain.

Snowpack Summary

A visit to some of our more remote weather plots today helped to give a more regional perspective on the snowpack. Below treeline is still the same as its been for the last while. Weak snow makes for difficult travel and poor coverage in terms of depth. On the up side, there are very few avalanche concerns! Depths range from 50cm-95cm.Treeline is variable these days for coverage and avalanche problems. Lower treeline suffers from the same weak snow/poor coverage issue. At the upper end of treeline the 10-30cm thick surface windslabs are present in open areas and vary in density. Hardslabs are common in windy areas and don't inspire confidence for ski quality or avalanches. The Dec 18th facet layer is prominent in all areas. It is down 30-50cm with a distinct density change. Lower down, the Nov crust layer is intact and still quite solid as a layer, but we are seeing depth hoar on top of it in most areas now. The alpine is essentially the same as treeline, but more variable. Wind exposure is the thing to keep in mind when predicting the hardslab locations. One common theme was the rapid change from feature to feature. In a few steps, the snowpack character changes considerably.

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