Boletín de aludes

Salt River and Wyoming Ranges

Bridger-Teton Avalanche Center
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Peligro de aludes

Mon
Alta montaña
4 · Fuerte
Límite del bosque
4 · Fuerte
Bajo el límite
3 · Notable
Desactualizado: este boletín caducó 2 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Very dangerous avalanche conditions exist. Triggering an avalanche large enough to bury, injure, or kill a person is likely in avalanche terrain at all elevations. In addition, natural avalanches are likely in the middle and upper elevations. Traveling in, near, or under avalanche terrain is not recommended today.

An avalanche warning is in effect until 6pm tonight. This warning will likely extend into tomorrow.

Problemas de aludes

  • Wind Slabs

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

    Significant new snow and moderate winds over the past 72 hours have created unstable conditions. Human triggered avalanches are likely on all aspects at all elevations. Slabs will be 1-2 feet deep in sheltered areas and up to 4 feet deep in wind-loaded terrain at the upper elevations. Temperatures warming to, or even above, freezing will increase the sensitivity of these slabs in the lower elevations today. Large natural avalanches are likely above 7,500’ and could run into lower elevation runout zones. Traveling in, near, or under avalanche terrain is not recommended today. Groomed snowmobile trails that cross under avalanche paths should be approached with extreme caution given the potential for natural avalanches initiating above and impacting the trails. 

    Additional Discussion 

    Snow levels are forecasted to climb to 7,500’ in the Salt and Wyoming Ranges today. Rain is likely at the lower elevations. Rain can rapidly destabilize the snowpack, further increasing the avalanche hazard.

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2.5

    Weak snow that formed in early December is now buried 2-4 feet deep and is weakest in shaded terrain on the north half of the compass. Avalanches involving the new snow have the potential to step down to these layers, producing large and potentially unsurvivable avalanches. While avalanches involving weak snow near the base of the ground are not likely to be widespread yet, recent events involving these layers are a good reminder to be vigilant today. Snowmobiles and groups can also act as large triggers and have a greater chance of impacting these layers.

    (12/20/2024)

    This avalanche was remotely triggered up Murphy Creek near the Stewart Massive ~8300' on a NE aspect on 12/20. 

    Photo: Bridger-Teton Avalanche Center

Avalanche Discussion

Over the past three days, 16-24” of new snow containing up to 2” of Snow Water Equivalent (SWE) has fallen at all elevations in the Salt and Wyoming Ranges. Avalanches involving this new snow are likely to be widespread today. Despite lower snowfall amounts today, the warming trend is significant and likely to destabilize the snowpack even further.  Expect “touchy” conditions if traveling in the backcountry today and be prepared for surprises. Additionally, this new load is stressing buried weak layers that were active just one week ago. While it’s difficult to predict the tipping point for activity on these weak layers, keep in mind that the recent loading has been substantial and is expected to continue over the next few days.

If you see avalanche activity today, please consider submitting an observation HERE. Observations allow everyone to gain a better and more complete understanding of conditions. Thanks!

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