Bollettino valanghe

Tetons

Bridger-Teton Avalanche Center
Vedi sulla mappa

Pericolo valanghe

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

In sintesi

Consistent snowfall for many days in the Tetons has resulted in conditions where backcountry skiers and riders have the potential to trigger slab and loose snow avalanches in very steep terrain at all elevations. A slight chance also continues for deeper weak snow layers to be involved that were formed during dry weather.  At upper elevations, watch for areas that appear wind loaded, and avoid all unsupported slopes where small avalanches can have dire consequences. At lower elevations, any evidence of collapse or "whoomphing" is strong indication that the snowpack is unstable and steep terrain in those areas is not safe for travel.

Problemi valanghivi

  • Wind Slabs

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

    Varying winds, most recently from the south, have formed slabs that may be reactive to human triggering today.  Wind direction is to veer to the west today. This will redistribute some of the fresh suface snow and could change the location and increase the sensitivity of this hazard. If triggered, these slabs will be soft and could have depths from 6 to 30 inches. 

    Other new snow hazards such as loose snow sluffing and storm slabs could also occur today on very steep slopes, particularly as elevation decreases and terrain is less effected by ridgeline winds. 

     

     

  • Persistent Slabs

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

    Older weak layers lie within the snowpack. The most notable is weak snow that formed during a mostly dry period in early February that was buried on February 18th.  This persistent problem can involve crusts at higher elevations and thick faceted snow layers at lower elevations that formed during cold, valley temperature inversions. 

    This weak interface from mid February can be identified by having a dig into the snowpack and performing stability tests.  Feeling the snowpack collapse, particularly at lower elevation can also indicate this instability. 

    The January 26th layer is thought to be dormant at this time. 

     

Avalanche Discussion

It has snowed consistently for 7 days in the Tetons. Amounts vary by locations but storm totals have reached four to five feet during that time. Generally, temperatures have been cold and winds have been moderate. Given fairly consistent snowfall, the sensitivity and the number of avalanches has been relatively low. Make no mistake that human triggered avalanches are possible. The Moderate rating is not a go light to travel anywhere you want. Be thoughtful and approach all terrain wondering if this is one of the places that can slide. The amount of new snow alone warrants conservative terrain choices and avoiding very steep areas with terrain traps and exposure. 

Regioni coperte