Bulletin d’avalanche

Kananaskis

Jan 17 – 18, 2014Alberta Parks
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Archivé · expiré 13 years ago

Danger d’avalanche

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

The natural avalanche cycle is slowing down but many slopes that have not yet slid just need a trigger.  Solar radiation will be intense this weekend so keep an eye on overhead slopes in the sun that will weaken throughout the day. See SPAW here.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    2–5
    Windslabs are beginning to settle out and strengthen but they are still a problem.  Be careful as you transition into more open wind affected terrain.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    3–6
    This layer came to life during the recent avalanche cycle and many large events were observed on this layer.  Any avalanche in the upper snowpack may step down to the basal facets so be thinking about large avalanches as you travel.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3
    Loose wet avalanches were observed on steep solar aspects on friday.  Some of the loose wet slides pulled out small slabs on underlying slopes.  Be aware of the potential for these smaller slides to step down to the deeper basal problems.

Confidence

Fair - Timing or intensity of solar radiation is uncertain on Saturday

Weather Forecast

No new snow is in the forecast for the next few days.  The big thing to pay close attention to is daytime warming on solar aspects.  The sun has triggerred a few large avalanches over the past few days so watch for deteiorating stability on solar aspects later in the day. 

Avalanche Summary

No new large avalanches today but there were a few solar triggerred avalanches up to sz 1.5 on solar aspects at treeline and below. 

Snowpack Summary

Thin melt freeze crust now exists on solar aspects up to 2400m.  Otherwise, expect pockets of hard slabs overlying a weak facetted base.  This weak facetted base is the reason that many of the avalanaches that have occurred recently involve the entire snowpack.

Régions couvertes