Bulletin d’avalanche

San Francisco Peaks / Kachina Peaks Wilderness

Kachina Peaks Avalanche Center
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Danger d’avalanche

Fri
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
3 · Marqué
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Périmé — ce bulletin a expiré 3 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

18-36" of snow has fallen in the last 24 hours, creating dangerous avalanche conditions at all elevations. 

Triggering an avalanche will be likely on loaded leeward slopes and terrain features. Slopes steeper than 30° should be carefully assessed. Avoid cornices, convex pillows of wind-drifted snow, and steep slopes with a continuous surface of harder, rounded, and rippled snow. 

 For the safest backcountry experience, stick to below-treeline slopes less than 30° steep. 

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2

    Wind-loaded, rounded, pillowed, rippled, and corniced slopes may have new and sensitive wind slabs. Exercise caution and be aware of micro terrain features.

    Below treeline, wind slabs were reactive on Wednesday, and all slopes and terrain features with slopes greater than 30° should be assessed. 

    Small to medium-sized wind slab avalanches may step down, triggering larger persistent slab avalanches.

    (3/1/2023)

    12-16" reactive windslab in a low elevation NNE wind-loaded pocket of snow.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–2.5

    With two weeks of rapid temperature changes and several storms, there is still some uncertainty about the upper snowpack of many difficult-to-access slopes of the Inner Basin. If any slopes have continuous and persisting weak layers, significant new snowfall may stress those layers to or near the point of failure. After significant snowfall, give the snowpack time to adjust and stabilize with the new load. KPAC recommends digging and observing the top 100-120cm of snowpack before committing to traveling in avalanche terrain. 

Avalanche Discussion

On Tuesday (Feb. 28) evidence of a crown line was observed on a northerly slope near Lockett Meadow Rd.  Elevation ~ 8000'. It appeared to be a relatively small avalanche, but large enough to sweep a person off their feet and into a tree. https://kachinapeaks.org/Observations/#/view/65f4c45c-80b1-4a51-bafd-5deb980d42dc

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Régions couvertes