Bollettino valanghe

Tetons

Bridger-Teton Avalanche Center
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Pericolo valanghe

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

In sintesi

Dangerous avalanche conditions exist. Recent strong winds and snowfall have formed slabs and added stress to buried persistent weak layers. Triggering an avalanche is most likely on steep, wind-loaded slopes, but still possible in sheltered terrain. Persistent slab avalanches can behave unpredictably. Evaluate the snowpack carefully and be conservative around steep terrain.

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1.5–2.5

    Triggering an avalanche up to 3 feet deep is possible on buried weak layers. Sheltered, northerly aspects between 8,000’ and 9,500’ are the most dangerous and where we have seen almost all of the avalanche activity this week. Buried facets and surface hoar have a similar distribution in these areas, but dig down to assess where these layers are buried. Buried surface hoar is notorious for wide propagation and being remotely triggered from gentle terrain above, below, or beside steep slopes. Other aspects cannot be ruled out yet. Give yourself a wide margin of safety around steep slopes today.

    Slopes that are wind-loaded and harbor buried weak layers will be dangerous today. Most avalanche activity observed has been on the west and south side of the Tetons, where weak layers are more widespread.

    (2/14/2026)

    Recent avalanches on the west side of the Tetons show the propensity for avalanches to propagate signifcantly across slope. 

    Photo: Cameron Huffman

  • Wind Slabs

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

    Strong west and southwest winds over the last three days have redistributed new snow and formed wind slabs up to 2 feet deep. These slabs could be sensitive to the weight of a rider. Look for wind slab below ridgelines, around cliffs, and in cross-loaded terrain features. Recent strong winds have affected snow surfaces at all elevations. On very exposed upper elevation slopes, hard wind slabs exist and could break above you instead of at your feet. Look for obvious signs of wind-affected snow, including large drifts, stiffened surfaces, and shooting cracks. Wind slabs can break deeper and step down to buried weak layers.

    (2/17/2026)

    This wind slab occurred two days ago on leeward terrain in a confined feature. 

Avalanche Discussion

The snowpack is continuing to adjust to recent loading. Consider approaching the mountains with an assessment mindset today as we continue to get a handle on the distribution of buried facets and surface hoar and the sensitivity to triggering. Dig around in the top 2-3 feet of the snowpack and see what you find, and if the slab overlying these weak layers wants to propagate (ECTs). Then let us know what you find and send in an observation. It’s critical to our forecasting and we can’t thank you enough.

Regioni coperte