Boletín de aludes

Snake River Range

Bridger-Teton Avalanche Center
Ver en el mapa

Peligro de aludes

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

Lo esencial

It is possible to trigger a large avalanche 2-4 feet thick, falling on weak snow on the ground. Recent wind has formed slabs up to a foot thick above 8000' in exposed areas.  Evaluate steep rocky slopes, gullies and rollovers carefully where you could more easily trigger an avalanche in thin areas or areas with wind-drifted snow.

 

Problemas de aludes

  • Wind Slabs

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

    Recent strong winds have been southwest, west, and northwest and continue to redistribute any loose snow in exposed areas. 611 miles of wind were reported on Baird in the last 24 hours. These slabs could be soft or hard with depths to one foot and are most likely to be found just below ridges and in rocky terrain, including couloirs. While the problem will be easier to find above 9000 feet, it could extend well into middle elevations and possibly isolated areas in lower elevations. Look for drifting and cracking on snow surfaces, and stick to slopes that are not exposed to the wind to avoid this problem.

  • Persistent Slabs

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

    Weak layers of snow are buried 2-4 feet deep in the Snake River range. Triggering a large hard slab avalanche at these depths has become unlikely but is not impossible. Instability is most likely to be found in very steep, north-facing terrain.  Triggering a large avalanche will be most likely in thin rocky areas where you can impact the weak layers.  Larger triggers, such as groups, snowmobiles, or falling cornices, will increase the odds of impacting these weak layers. 

    (1/16/2025)

    An example of complex terrain in the Snake. Very steep, wind affected slopes where trigger points for a hard slab avalanche could be close to the surface.

    Photo: Bridger-Teton Avalanche Center

Avalanche Discussion

The snowpack is straightforward. Old, buried snow layers continue to warrant consideration. This avalanche problem is currently a low likelihood/high consequence scenario. Choosing terrain that reduces your exposure and remaining vigilant when traveling in avalanche terrain is important given this setup. A very large natural avalanche involving these layers occurred on January 7th and is a good reminder of weak snow lurking below. The wind slab problem is most likely to be found in very steep, rocky or "extreme" terrain. The wind slab problem should be short lived as the freshly transported snow bonds to the recent snow surfaces. 

Please continue to send us your observations!

Regiones cubiertas