Bollettino valanghe

Tetons

Bridger-Teton Avalanche Center
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Pericolo valanghe

Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato
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In sintesi

Strong winds and heavy snowfall have created dangerous avalanche conditions. Wind slabs have increased in depth and are more widely distributed than they have been. These dangerous slides are likely to be sensitive to human triggers. Natural releases are possible. These slides can capture skiers and riders, run long distances and can produce significant areas of avalanche debris deposition. Very large destructive deep slab avalanches continue to be a concern at the upper elevations. The WYDOT triggered a large slide in the Twin Slide avalanche path early this morning that crossed the highway. Similar events could be human triggered or release naturally today. Expert terrain analysis and route finding skills are essential for safe travel in avalanche terrain.

Problemi valanghivi

  • Wind Slabs

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

    Strong southwest winds have created areas of wind slab. These soft surface slabs can be easily triggered by humans on steep avalanche prone slopes at the mid and upper elevations. These slabs are expected to be one to two feet deep but could be up to three feet deep in some areas. Pockets of wind slab up to a foot in depth could be human triggered in steep avalanche starting zones and on steep banks and road cuts at the lower elevations.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    3

    At the upper elevations deep hard slabs with depths to six feet continue to be a concern on west through north to east aspects. Areas of blowing snow have rapidly loaded avalanche starting zones and increased the potential for deep slab avalanche occurrences. These deep slabs are very destructive and survival is unlikely.

Avalanche Discussion

Skies are to be partly clear through Thursday with occasional isolated mountain snow showers or flurries possible. West winds will remain relatively strong with averages between fifteen and twenty five miles per hour. Temperatures will be warmer with mountain highs in the upper teens to low twenties. In the Tetons, the general avalanche hazard will be Moderate above 7500 feet and low below that elevation. In the Togwotee Pass and Southwest Trails areas, the hazard will remain Considerable above 9000 feet and Moderate below. The avalanche problems remain the same in all areas. Deep weaknesses in the snowpack persist and very large avalanches could be human triggered on these old layers. The difference in the rating is related to the likelihood of triggering avalanches on this layer. In the Tetons where the most snow has fallen, these slabs are becoming harder to trigger than in the other areas. This is partly due to depth but also due to the fact that recreation involving larger triggers, specifically snow machines are far more prevalent in the other areas. In all areas, wind slabs with depths of one to three feet could also be triggered in very steep avalanche terrain.

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