Bulletin d’avalanche

Kananaskis

Feb 23 – 24, 2019Alberta Parks
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Archivé · expiré 8 years ago

Danger d’avalanche

Mon
Tue
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré
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Points saillants

Variable conditions in the alpine. Expect new wind slabs near ridge lines.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Start looking for these as you approach treeline. They can sneak up on you as you approach open areas. We got the feeling they could possibly be toe triggered today.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Not a show stopper of a problem, but given how big they have been lately its worth keeping them in mind. Oddly enough, the sun might pack enough of a punch to get them going on steep south aspects late in the day.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1.5–3
    This layer is back in the game. Thin spots and a weakening mid pack could spell trouble.

Confidence

High -

Weather Forecast

Clear and cold for tomorrow. -25 overnight and warming up to -15 in the afternoon. Light cloud is expected for most of the day. No new snow and light winds at all elevations.

Avalanche Summary

It looked as though there was a small natural cycle that went on last night. Numerous loose dry avalanches that entrained the old facetted snow. Up to sz2. There were a few slabs, the most noteworthy being the sz3 on Tent Ridge yesterday. No new activity as of this morning.

Snowpack Summary

Most alpine areas are showing the impact of yesterday's wind event. While not wind scoured, it looks freshly wind loaded near ridges. Treeline has a similar loading pattern with a reasonably dense (4-finger), 10-20cm thick windslab over facets. Even below treeline areas had a hint of this wind slab in down-flow wind(cold air sinking and/or swirling) areas. Its important to note that these winds were from the north and have left an unusual loading pattern.  Aside from these new, touchy windslabs there isn't a lot of change overall.

Régions couvertes