Bulletin d’avalanche

Tetons

Bridger-Teton Avalanche Center
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Danger d’avalanche

Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Périmé — ce bulletin a expiré 9 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Above 8,500 feet, backcountry travelers venturing into steep, avalanche-prone terrain could trigger large slab avalanches in areas that held snow from October. Don’t let your guard down. While these slabs are becoming less likely to trigger, they still carry high consequences. Skiers and riders might also be able to trigger an isolated pocket of newly developed, shallow wind slab on very steep, wind-loaded slopes near upper elevation ridgelines. The snowpack is mostly stable below 8,500 feet.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3

    Large slab avalanches, up to four feet deep at the higher elevations, could be human triggered on old snow surfaces from October. Be suspect of avalanche-prone slopes on northwesterly to easterly aspects at the upper elevations and northerly aspects down to an elevation of 8,500 feet. These slides are more likely to occur in mostly shaded terrain where the old snow surfaces experienced more faceting.

Avalanche Discussion

A weak, transitory ridge of high pressure will move overhead on Sunday resulting in dry conditions and mostly sunny skies. Overnight lows in the mountains will be in the mid-teens before rising to near 30 during the day. Westerly to southwesterly ridgetop winds will range from 15 to 25 miles per hour.The general avalanche hazard is expected to be MODERATE between 8,500 and 10,500 feet, and LOW below 8,500 feet. Backcountry travelers might still be able to trigger a large persistent slab avalanche two to four feet deep in steep, avalanche prone terrain that held snow from October. These slides would be more likely to occur in mostly shaded terrain where the old snow surfaces experienced more faceting. Skiers and riders might also be able to trigger an isolated pocket of newly developed, shallow wind slab on very steep, wind loaded slopes near upper elevation ridgelines. Climbers and ski mountaineers that are planning to be above 10,500 feet in the Tetons need to remember that the old snow surfaces from October continually expand their extent into sunlit aspects with a gain in elevation.

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