Lawinenlagebericht

Togwotee Pass

Bridger-Teton Avalanche Center
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Lawinengefahr

Hochgebirge
4 · Gross
Waldgrenze
3 · Erheblich
Unterhalb
Keine Stufe
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Kernpunkte

Very dangerous avalanche conditions are developing above 9,000 feet, and travel in avalanche terrain is not recommended. Dangerous avalanche conditions exist between 7,500 and 9,000 feet. Yesterday in Grand Teton National Park, a snowboarder triggered a 2 foot deep wind slab on a north facing aspect around 8,900 feet. He was caught, carried through extreme terrain and did not survive. Similar slides are likely to be triggered today, and natural activity will be possible. Persistent deep slab avalanches could be human triggered, occur naturally or step down from the release of a wind slab. Involvement in one of these destructive, large to very large avalanches will almost certainly result in another fatality. It is critical for skiers and riders to choose the appropriate terrain for the current avalanche conditions. Play it safe today and come home to your friends and family; stay off of and out from underneath terrain steeper than 30 degrees.

Lawinenprobleme

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    2–3

    More weight will be added to faceted layers deep in the snowpack as the day progresses, and persistent deep slab avalanches remain a serious threat. These slabs could be triggered by backcountry travelers or occur naturally. They could also step down from the release of a wind slab. Slab depths will likely be between 4 and 8 feet above 7,500 feet. If you are caught in one of these destructive slides, you will most likely not survive. Below 7,500 feet, these slabs are likely to range in depth from 2 to 4 feet.

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–2

    Overnight, westerly ridgetop winds backed to the southwest and ramped up to 30 to 40 miles per hour with gusts to 68. Available snow was easily transported onto leeward slopes and wind slabs stiffened and gained mass. Very strong winds will continue today along with moderate to heavy snowfall, and wind slabs will continue to build. Above 7,500 feet, skiers and riders could easily trigger these slabs with depths ranging from 1 to 3 feet. Natural activity will also be possible.

Avalanche Discussion

( Discussion is generated from the previous day's afternoon forecast. )Northwesterly flow aloft will back to the west as a cold front brings another round of snowfall overnight and through the day on Tuesday. Overnight lows in the mountains will be in the mid to upper teens and temperatures are not expected to rise much if any during the day. Westerly to southwesterly ridgetop winds will increase to 25 to 35 miles per hour.Avalanche conditions will remain dangerous, and the general avalanche hazard is expected to be at least Considerable on Tuesday. New snow and strong winds will continue to load leeward terrain forming wind slabs and adding weight to deeply buried persistent weak layers. Skiers and riders will continue to be able to easily trigger small to large wind slabs in steep, wind loaded terrain. Natural activity will also be possible. Persistent deep slab avalanches could be human triggered, occur naturally or step down from the release of a wind slab. Involvement in one of these destructive, large to very large avalanches will almost certainly result in another fatality. It is critical for skiers and riders to choose the appropriate terrain for the current avalanche conditions. Play it safe tomorrow and come home to your friends and family; stay off of and out from underneath terrain steeper than 30 degrees.

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