Bollettino valanghe

Summit Lake

Chugach National Forest Avalanche Center
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Pericolo valanghe

Wed
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato
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Non aggiornato — questo bollettino è scaduto 7 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Today's new snow is adding stress to our weak snowpack, making natural and human-triggered avalanches on buried weak layers 1 to 3' deep likely. In addition, triggering avalanches up to 1' deep in wind-loaded areas near ridgelines will become an issue this afternoon when southeast winds start to pick up. To manage these hazards while enjoying the new snow, you can stick to simple, low-angle terrain and avoid the runout zones of overhead avalanche paths. 

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Join us Friday, Feb. 13, for the annual Snowball fundraiser! This event is a collaboration with the Alaska Avalanche School and is always a fun way to support two nonprofit organizations that provide avalanche information and education in our area. Silent auction, beverages, hors d'oeuvres, and music by Hope Social Club! Tickets and event info at alaskaavalanche.org

Problemi valanghivi

  • Persistent Slabs

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

    Recent avalanches: There was a widespread avalanche cycle from January 14th to 16th in the Summit Lake zone. Since then, there have been tons of collapses reported from the Summit Lake area, but no new avalanches. 

    The intensity of the current storm system is expected to ratchet up today, with 4 to 6" of new snow expected in Summit Lake. Stronger southeast winds will accompany the heavier snowfall, averaging 20 to 30 mph with gusts up to 45 mph. This gradual accumulation of new snow and wind is likely to be enough to make our weak layer, which is buried 1 to 3' deep, more sensitive to human-triggered avalanches and could cause some natural avalanches in specific areas that receive more wind loading. 

    While the likelihood of triggering an avalanche today is on the rise, the advice for how to deal with the problem stays the same. You can use conservative terrain selection to control your risk exposure by sticking to simple, low-angle terrain and avoiding the runout zones of overhead avalanche paths. Remotely triggered avalanches have been especially common on this weak layer, which means you could trigger an avalanche from low-angle terrain onto connected steeper terrain. 

    (1/20/2026) Snowpack structure at treeline in Summit Lake before the current storm started. Photo: John Sykes

  • Wind Slabs

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

    With yesterday's 2" of new snow (0.2" water), combined with another 4 to 6"  of new snow today (0.25 to 0.5" of water), there will be some soft snow on the surface to be transported into fresh wind slabs. When the winds pick up this afternoon, wind slabs 6 to 12" deep will be forming on leeward slopes. You can test for wind slabs by using small test slopes to look for shooting cracks or small avalanches in wind-loaded pockets of terrain. These typically form near ridgelines, gullies, and convex rolls where wind-transported snow tends to accumulate. 

    NWS Snowfall Forecast for 1/27/26

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