Lawinenlagebericht

Togwotee Pass

Bridger-Teton Avalanche Center
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Lawinengefahr

Mon
Hochgebirge
3 · Erheblich
Waldgrenze
2 · Mässig
Unterhalb
Keine Stufe
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Veraltet — dieser Lagebericht ist last year abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

Avalanche conditions are dangerous today. New snow and wind have built wind slabs 1-2 feet thick which could bury a person if triggered. Wind-drifted snow will also stress weak layers buried 2-3 feet deep. Avoid riding on or beneath wind loaded slopes, especiallyy where cornices are vivisble above. 

Lawinenprobleme

  • Wind Slabs

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

    Winds slabs grew overnight and will be sensitive to triggering today.  Four to five inches of snow fell in the past 24 hours and will continue to grow in size today with more 3-5" more snowfall and increasing southwest and west wind. Beware of wind loaded areas at the base of cliffs and at the exits of steep gullies where wind driven snow has accumulated. 

    Watch for dry loose avalanches on steep terrain over 35°. Recent snow has fallen on a variety of different snow surfaces that vary by aspect. Perform quick hand shear tests and assess how the recent snow is bonding to old snow surfaces.

    (3/15/2025)

    A small wind slab in northwest facing terrain off Cardiac Ridge at 9,600’. The slab failed on old snow down about 14”. Wind slabs of this size are likely to be foudn in Togwottee today.

    Photo: Bridger-Teton Avalanche Center

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1.5–3

    Weak layers are most likely to be triggered where the slab is 2-3 feet thick and on very steep slopes over 35 degrees. Triggering a wind slab increases the possibility of an avalanche stepping down to buried weak layers. Signs of instability such as cracking, collapsing, or recent avalanches may not be present before triggering a dangerous avalanche. Multiple tracks on a slope do not indicate stability with this problem type. Suspect terrain includes very steep, rocky, and/or wind affected slopes where thin spots exist making it possible for humans to impact buried weak layers. 

    Persistent slab avalanches are capable of propagating widely across or up a slope. For this reason, it is not out of the question to trigger a larger hard slab avalanche with depths over 5 feet as a result of hitting a thin, shallow portion of the slope. Heavily wind affected slopes are where these avalanches could break deeper, such as this very large persistent slab on Lava Mountain that occurred on February 10th.

    The last human triggered persistent slab avalanche occurred on March 2nd in terrain similar to this.

    Photo: Dakota Richardson

Avalanche Discussion

If you see avalanche activity or would like to help inform our forecasts, please consider submitting an observation HERE. You can also text what you see to us at 307-264-3050.

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