Bollettino valanghe

Togwotee Pass

Bridger-Teton Avalanche Center
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Pericolo valanghe

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

In sintesi

Dangerous avalanche conditions exist. You are most likely to trigger an avalanche on steep wind-loaded terrain. Additionally, it is possible to trigger an avalanche on weak layers buried 1-2 feet deep. Carefully evaluate the snowpack, and use conservative decision-making around steep terrain. Continued snowfall and wind will make triggering more likely as the day progresses.

Problemi valanghivi

  • Persistent Slabs

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

    Due to the thin snowpack at Togwotee, triggering a persistent slab avalanche is possible. Weak layers buried 1-2 feet below the snow surface remain. Although there has not been a reported persistent slab avalanche for over a week, multiple storms moving through Togwotee will increase the likelihood of triggering an avalanche - particularly on north-facing slopes at upper elevations where winds have deposited additional snow. Watch out for obvious signs of instability such as cracking or collapsing. Use a wide safety buffer and conservative decision-making around steep slopes to address the uncertainty.

    (12/20/2024)

    Slab avalanche near Dry Lake, Togwotee area.

    Photo: Bridger-Teton Avalanche Center

  • Wind Slabs

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

    Yesterday, Togwotee received 5 - 7 inches of snow with an additional 4-6 inches of snow forecasted for today. This new snow combined with moderate southwest winds has formed slabs up to a foot thick on all elevations and aspects. Expect these slabs to grow larger as snowfall and west-southwest winds continue today. You are most likely to trigger a wind slab near ridgelines, on exposed leeward slopes, or on mid-slope terrain features such as gullies.  Watch for obvious signs of instability such as cracking or collapsing, and avoid steep slopes with signs of wind-loading. Cornice growth and pillows are clear signs of wind-transported snow.

    Signs of wind transport. Small pillows were created in an open meadow at 8000'. 

    Photo: Cameron Galt

Avalanche Discussion

Storm systems will continue to impact the Salt and Wyoming Ranges bringing consistent snowfall and winds. Combined with yesterday's storm totals, expect increased avalanche activity today. Be aware that instability in the snowpack may increase as additional snow falls today and into tonight. Additionally, expect slabs to grow in size as these storms continue. Over the past week, many of the weak layers formed in early December have shown signs of low reactivity. This may change as additional loads are added to the snowpack. Knowing when or if these layers are going to reactivate is difficult to know. For now, it's best to assume we will see activity on these layers, and make conservative decisions around slopes that harbor old weak snow. 

Use safe travel practices when moving through the backcountry today. Pay close attention to your surroundings and know that conditions are constantly, and potentially rapidly changing as the day progresses. Today is a good day to step back and take time to examine the snowpack. New snow is expected for days to come, so staying up to date on how the snowpack is reacting will be a high priority.  

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