Bollettino valanghe

Snake River Range

Bridger-Teton Avalanche Center
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Pericolo valanghe

Sat
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 6 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Numerous avalanches were triggered yesterday on weak layers buried 1-2 feet deep primarily on N-NE aspects between 8,000-9,500’. Triggering similar avalanches will remain possible today across an array of aspects and elevations, despite little to no change in weather. Avalanches can be triggered remotely from gentle terrain above, below, or beside steep slopes. Assess the snowpack and terrain carefully to avoid these avalanches.

Problemi valanghivi

  • Persistent Slabs

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

    Weak layers formed during the extended drought in January became reactive yesterday as the overlying snow settled into a firm, cohesive slab. Avalanches will be most likely on shaded slopes around 35° or steeper, but could be triggered on other aspects and elevations. Due to the scattered distribution of weak layers, some slopes may appear stable while others are not. These slopes need time to heal before the likelihood of triggering avalanches decreases. Look for terrain previously wind loaded where the overlying slab is stiffer and easier to trigger. These soft slab avalanches will range from 1-2 feet deep. Avalanches could behave as wet slides due to increasing temperature and clearing skies today.

    Check out the recent avalanche activity in the Snake Rive Range here. 

    (2/12/2026)

    Large remotely triggered avalanche  that shows the ability of weak layers to propagate significantly cross-slope. 

    Photo: Bridger-Teton Avalanche Center

Avalanche Discussion

Friday the 13th

Avalanche conditions changed yesterday as warmer temperatures and solar radiation (clear skies) allowed the recent snow to settle into a firm, cohesive slab. Weak layers formed in January vary drastically across terrain with facets, surface hoar, and crusts all in the mix. Knowing exactly how these weak layers will behave prior to adding a firm overlying slab is difficult to predict. Some areas have bonded well to the weak snow while others have not. The avalanche activity yesterday paints a clear picture that these weak layers are reactive, especially on N-NE shaded aspects in the middle-upper elevations. There’s a higher amount of uncertainty of the reactivity across all aspects. Use caution as the snowpack adjusts. Dig down and perform quick stability tests and find small, inconsequential test slopes to gain an understanding of the persistent weak layers we are dealing with. Steep slopes over 35° should be assessed thoroughly before being ridden. Expect these weak layers to remain active without any significant changes in weather through the weekend. 

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