Bollettino valanghe

Tetons

Bridger-Teton Avalanche Center
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Pericolo valanghe

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

In sintesi

Human triggered avalanches will be likely at the middle and upper elevations, especially where wind affected snow overlies buried weak layers and crusts on slopes steeper than 35 degrees. These layers of concern are located within the top meter of the snowpack and are showing the strongest signature on NE through E through SE aspects. Pay attention to signs of instability such as cracking within wind drifted snow and use your shovel to assess buried weak layers. 

Problemi valanghivi

  • Wind Slabs

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

    Wind slabs: Soft wind slabs that are 1-2 feet thick will be sensitive to human triggering at the middle and upper elevations. Winds averaged out of the SSW and will veer to the W today. 

    Storm slabs: Soft storm slabs up to 1 foot in depth could be lingering in sheltered terrain at the middle and lower elevations. 

    Dry Loose: Dry loose avalanches could pose a threat in steep terrain. 

    The failure plane for all new snow problems will likely be the most recent crust that was buried on 3/30.

  • Persistent Slabs

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

    The March 20th interface is buried 50-90 cm down from the surface of the snow and is reacting in the moderate to hard range in stability tests. It is still showing a propensity to propagate a fracture on NE through E through SE aspects. The most recently observed avalanche on this layer was on March 30 on Mt. Taylor on a NE aspect at 10k'. 

    (3/30/2023)

    Looking up at avalanche from below after triggering on the ridge. 10,000' NE aspect

Avalanche Discussion

The Tetons have picked up 6-13 inches of 10% snow over the last 24 hrs. Winds on Rendezvous Summit have averaged 26 mph out of the SW with 624 total miles of wind. The forecast for today is for tapering snow showers and westerly ridgetop winds around 25 mph. 2-4 inches of accumulation is possible with high temperatures on the summits near 20 degrees. The valleys could reach the mid 30s. 

Most new snow avalanche problems should fail on the 3/30 interface, but there is still potential for things to step down to the 3/20 layer. 

Recent avalanches

 

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