Bulletin d’avalanche

Kananaskis

Jan 12 – 13, 2018Alberta Parks
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Archivé · expiré 9 years ago

Danger d’avalanche

Sun
Mon
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Skiing is still good in sheltered areas but expect wind slab formation to increase as time goes on and winds pick up. Treeline will become a likely place for avalanches as the Jan 6th loads.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3
    These start right at the treeline/alpine border. In some sheltered areas, there is still a buried windslab that is worth some consideration.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3
    This shows up as either surface hoar or facets. It has been inconsistent with test results, but we're working under the assumption that it could be triggered in the right (or wrong?) terrain.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Running far and fast up to sz 2. From steep unskiable areas. Ice climbers be aware. Expect spindrift on lee slopes.

Confidence

High -

Weather Forecast

Cloudy with sunny periods and isolated flurries tomorrow. Alpine highs of -3.  Ridge wind west 40 km/h.

Avalanche Summary

The widespread cycle involving the storm snow has continued. There was numerous loose dry out of all aspects in the alpine. Including a low density slab that was witnessed today (E asp, 2500m out of steep unsupported terrain). We also had a report of small pockets of the Jan 6th surface hoar waking up. These were in the Warspite drainage and at treeline. They happened early yesterday and were up to sz2.

Snowpack Summary

The winds were noticeable today with lots of snow transport at summit elevations. This increase in winds has created fresh windslabs on Northeast to South aspects in the alpine. At treeline, the Jan 6th & Dec 15th layers start to become apparent, but still unreactive due to the lack of snow load and a slab. The Dec 6th becomes more apparent the lower you go. But again, the lack of a slab is preventing an avalanche problem. Today's notable observation was multiple stability tests with repeatable results below the Nov 27 crust(down 85cm). All tests failed with moderate loads. The technical details are: ECTP21 & CTM(19) sudden collapse. In a nutshell, this is telling us that those layers are breaking down and we should keep them in mind when assessing the snowpack.

Régions couvertes