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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Non aggiornato — questo bollettino è scaduto 7 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Seven days of consistent snowfall and strong winds have created dangerous avalanche conditions. In steep wind loaded terrain, wind slabs could be triggered on all elevations and on many aspects. At the mid and high elevations, the chance to trigger deep persistent slabs also continues. Exercise cautious route finding by identifying wind loaded terrain and by evaluating the snowpack, particularly in areas where the weak basal snow exists.

Problemi valanghivi

  • Wind Slabs

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

    Strong west to southwest winds continue to drift snow onto leeward aspects. These slabs could fail with varying depths up to three feet as they may release upon density changes within the recent snow or back to the interface layer covered on January 1st. These slabs can be found throughout steep terrain at the higher elevations and on specific terrain features at the low elevations.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–3

    At the mid and upper elevations strong winds and recent new snow continue to increase the load on persistent weak layers of faceted snow near the base of the snowpack. Dangerous hard slab avalanches up to five feet in depth could be triggered by a person on this problem layer. These deep slab avalanches are more likely to fail on northwesterly through northeasterly aspects above 8,000 feet and could step down from the release of a wind slab. Being caught in one of these slides is likely to have severe consequences.

Avalanche Discussion

Light snow is to begin around 2am tonight and bring an inch or two of snow by sunrise. Moderate snow is then expected through the rest of the morning with periods of heavy snowfall. On Wednesday afternoon and evening, snow is to become more showery in nature but snowfall rates could still be moderate to heavy. Six to eight inches could fall by Wednesday evening. Winds are to be from the south, backing to the southwest with twenty to thirty mile per hour averages. Temperatures at 9000 feet are to rise from the teens to the low twenties. The general avalanche hazard will remain Considerable. Human triggered avalanches involving snow that has fallen since January 1st could fail with depths to three feet in steep wind loaded areas and the chance continues for large to very large slides to occur on persistent layers near the base of the snowpack. These deeper slides could have depths to five feet at higher elevations. Below 8000 feet, isolated pockets of wind slab could be triggered with depths to eighteen inches.

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