Avalanche forecast

Kananaskis

Jan 26 – 27, 2018Alberta Parks
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Avalanche danger

Sun
Mon
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
2 · Moderate
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Highlights

Mellow treeline terrain will be your best bet for good skiing right now. Avoid big alpine features right now.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    1.5–2.5
    This layer is widespread in the alpine and exposed treeline areas. Expect them to extend far below the ridge crests. They will likely step to deeper layers as they carry downhill.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    1–2.5
    This persistent slab is actually a couple of persistent weak layers that we've described individually in the snowpack summary. There is a serious snowpack weakness in areas that we wouldn't normally expect.

Confidence

High -

Weather Forecast

Avalanche Summary

Some loose dry avalanches from yesterday's storm were evident as the light improved. Of note, there was one sz 2.5 slab avalanche on Mount Buller. NE aspect, 2200m. It started in the alpine on what appeared to be the Nov 26 crust. As it traveled, it pulled out the gully sidewalls and ran quite far.

Snowpack Summary

Lots of tricky layers out there at the moment. At first they seem confusing, but thinking of them from an elevation perspective helps. They are all on our radar as problems and they all have potential to produce large avalanches. Here's the run down:Alpine- We have the Dec 15th facet layer as the main trouble maker and some surface windslabs that are lingering. The 15th layer is down 80-120cm and has been responsible for several slides in the last week.Treeline- The Dec 15, Jan 6th surface hoar layer, Jan 18th surface hoar layer are all present. They are down about 85, 65 & 45cm respectively. Some avalanches have been noted on the 6th, and tests show failures on all 3 layers.Below Treeline- Basically the same as treeline, but a lack of snow load and/or a slab property above the layers prevents them from being as big a problem. The ski quality is actually quite good in mellow, treeline terrain. Alpine features have been windloaded and look plump at the moment.

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