Boletín de aludes

Togwotee Pass

Bridger-Teton Avalanche Center
Ver en el mapa

Peligro de aludes

Tue
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
Sin grado
Open full map
Desactualizado: este boletín caducó 3 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Recent snow accompanied by moderate westerly winds formed slabs and stressed buried weak layers. Triggering an avalanche will be possible today, especially in areas that contain a combination of lingering wind slabs above those weak layers. Careful terrain assessment will be required to identify previously wind loaded terrain and monitor for increased reactivity on slopes that receive sun. 

Problemas de aludes

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1.5–2.5

    Deep weak layers buried in February and even earlier pose a serious threat across all elevations and aspects. Slab depths will range 2-3 feet with larger slabs possible in the upper elevations. These layers are composed of crusts, facets, and depth hoar. Wind loaded terrain is the biggest concern, as triggering one could step down to those buried weak layers.

    (3/19/2023) Persistent slab layer highlighted by propagating results during stability tests. 

    9600' SE aspect

    Photo: Drinkard

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–2

    Sustained W/SW winds above 20 mph two days formed soft wind slabs. These slabs will still be reactive today in the upper elevations, as they lie above a poor, weak interface buried March 20th. Slabs depths will be 1-2 feet deep. Areas with the highest likelihood of triggering will be on leeward and cross loaded exposed terrain below cliffs and confined features such as couloirs. Look for obvious signs of instability such as cracking, stiffened or ripple surfaces, and drifts.

Avalanche Discussion

Entrenchment

Poor snowpack structure continues to haunt Togwotee as weak layers buried in February and even earlier will warrant careful terrain assessment. Recent snow from this last storm cycle has added stress to these layers, especially in wind loaded terrain. Continue to be patient and choose terrain based on this low probability, high consequence scenario. Avoid terrain traps and complex terrain with large start zones and avalanche paths.

Regiones cubiertas