Bollettino valanghe

Turnagain Pass and Girdwood

Chugach National Forest Avalanche Center
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Pericolo valanghe

Mon
Alta quota
2 · Moderato
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 8 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

A person may be able to trigger an avalanche in steep terrain where there is stiff, windblown snow sitting on top of a weak layer of snow buried around a foot deep. This will be most likely in upper elevations just below ridgelines, convex rollovers, and in steep gullies. There is also a smaller chance that glide avalanches will occur naturally.

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Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2

    Recent Avalanches: The most recent reported avalanches were on the west side of Seattle Creek last weekend. These were likely wind slabs failing on weak, faceted snow. 

    It's the winter solstice today, which at Turnagain Pass means we have a whopping 5 hrs and 37 min to get out and enjoy the variety of snow textures the past two weeks of cold, clear, windy weather has brought us. Our main avalanche concern is the weak layer of sugary, faceted snow that has formed during this dry spell, and is buried by stiff, windblown snow in the upper elevations.

    This setup may give warning signs like shooting cracks or collapsing, but it will not always give you clear feedback when conditions are dangerous. Expect to find the most unstable conditions in steep terrain just below ridgelines, convex rolls, and in gullies. These stiff and stubborn wind slabs have a dangerous potential to allow a person to travel well out onto a slope before triggering an avalanche that propagates well above them. While we do not expect to see any natural avalanches today, it will be important to identify and avoid any slopes that have a stiff wind slab on the surface.

     

    (12/18/2025)

    The layers of buried surface hoar have gone dormant, but that weak, faceted snow near the surface may still produce large avalanches where it is capped by a stiff wind slab. Photo from a snowpit on Magnum Ridge last week.

    Photo: Marc Heifetz

  • Glide Cracks

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    2–3

    The glide avalanche cycle finally appears to be slowing down. However, this type of avalanche is notoriously difficult to predict. Even though it seems to be unlikley that we will see much for glide avalanche activity today, it is always a good idea to avoid spending any time under open glide cracks so you don't get caught by surprise.

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