Avalanche forecast

Tetons

Bridger-Teton Avalanche Center
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Avalanche danger

Alpine
3 · Considerable
Treeline
3 · Considerable
Below
2 · Moderate
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Highlights

Up to 20 inches of new snow has fallen since Sunday evening. Abundant amounts of new snow, moderate winds and a variety of sliding surfaces are creating dangerous avalanche conditions. Large human triggered avalanches are possible on steep avalanche prone slopes. Natural avalanche activity is possible. In areas not affected by the wind, loose snow sluffs in steep terrain could entrain enough snow to easily bury a person. On Sunday a snowboarder died in a tree well at one of our ski resorts. Snow immersion is a significant hazard in the backcountry today. Travel with a partner(s) and keep them in sight.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2

    At the upper elevations moderate westerly winds have formed areas of wind slab on leeward aspects. These slabs could be triggered on density breaks and firm wind-packed snow surfaces. At the mid and lower elevations light to moderate south to west winds have formed pockets of wind slab. These slabs could be triggered on density breaks, wind-pack, sun crust or faceted snow layers. These slabs could be 1 to 3 feet deep.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    2

    Some potential remains for persistent slab avalanches to be human triggered, especially at the lower elevations and in areas at the mid elevations where the snow depths are shallower. These persistent slabs are likely to range in depth from 2 to 4 feet, and could also step down from the release of a wind slab.

Avalanche Discussion

Periods of light to moderate snow are expected until midnight. Periods of lighter snowfall will continue into Wednesday. Temperatures will remain in the single digits and teens in the mountains and be in the teens and 20’s at the lower elevations. Winds are forecast to be from the northwest at 10 to 20 miles per hour. The general avalanche hazard is expected to be considerable in the Greys River and Togwotee Pass areas. In these areas large to very large persistent slab avalanches are likely to be human triggered on some avalanche prone slabs. These dangerous slabs could be 2 to 6 feet deep. The general avalanche hazard is expected to be moderate in the Teton area where small to large slab avalanches could be human triggered on steep avalanche prone slopes. These slab avalanches could be 2 to 4 feet deep and could be large enough to seriously injure or kill a person.

Regions covered