Bulletin d’avalanche

Kananaskis

Jan 7 – 10, 2023Avalanche Canada
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Archivé · expiré 4 years ago

Danger d’avalanche

Mon
Tue
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
1 · Faible

Points saillants

Warm temps are helping to settle our current snowpack but its going to take a long time before we have any confidence in it. Expect to be wallowing in facets at lower elevations up to treeline as the snowpack is weak. The deep persistent problems are hard to predict and can have big consequences if triggered.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2.5

    If triggered the persistent slab is very likely to steep down to the deeper instability and involve the entire winter's snowpack.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2.5

    This layer is easy to trigger from thin, weak shallow areas.

Confidence

High

Avalanche Summary

Avalanche Control on Friday surprisingly produced minimal results which gave forecasters an uneasy feeling that this is a complex tricky snowpack.

Snowpack Summary

Large surface hoar was found on Friday to 2200m. This may be a layer to watch in the future.

Otherwise not much is changing in the snowpack (and that's not a good thing!). The mid-December surface hoar layer down 30cm at Treeline is reacting as a persistent slab with compression tests in the moderate range. Below this, the remainder of the snowpack is heavily facetted. Any avalanche triggered in the upper snowpack will almost certainly step down to the ground.

Forecasters are approaching all terrain conservatively and do not have much confidence in the snow pack, as it's one of the worst we've seen in many, many years.

Weather Summary

Clouds and Light Sw winds will be the theme tomorrow. No snow expected. day time high of -7

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.
  • Be aware of the potential for surprisingly large avalanches due to deeply buried weak layers.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.

Régions couvertes