Lawinenlagebericht

Salt River and Wyoming Ranges

Bridger-Teton Avalanche Center
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Lawinengefahr

Mon
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
2 · Mässig
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Kernpunkte

Dangerous avalanche conditions exist. Human triggered avalanches with depths up to 3 feet are likely in steep, shaded terrain above 7,500’ today. These avalanches may be triggered without warning and break wider than expected. Remotely triggering an avalanche from below steep slopes is possible. Clear skies and warming temperatures will cause loose snow avalanches to occur in steep, south facing terrain by the afternoon. Carefully evaluate the snowpack and give steep, consequential terrain a wide margin today.

Lawinenprobleme

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1.5–2.5

    Weak layers of snow including surface hoar and facets that formed during a month-long dry period in January are buried 2-3 feet below the surface on shaded slopes. Very steep, northerly aspects above 7,500’ are the most dangerous and where we continue to see human triggered avalanches. Triggering an avalanche large enough to bury a person is likely in these locations today. Wind-loaded slopes will produce the largest avalanches, but avalanches are also possible in sheltered terrain. Avalanches involving weak snow from January may break wider than expected and could fail after multiple riders have ridden a slope. Signs of instability including recent avalanches or collapses in the snowpack may not be present before triggering. Avoid traveling below very steep slopes as remote triggering continues to be reported. Give yourself a wide margin of safety around very steep and shaded slopes today.

    Most recent persistent slab avalanches have occurred in the Salt River Range.

    A large avalanche that was remotely triggered by a rider in the Snake yesterday (2/21). This avalanche failed 2-3 feet deep on weak snow that formed during January.

    Photo: Bridger-Teton Avalanche Center

  • Wind Slabs

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

    Moderate winds out of the west and southwest within the past 48 hours have redistributed recent snow and formed slabs up to a foot deep in wind-loaded, upper-elevation terrain. These slabs may be reactive to the weight of a rider on very steep slopes today. Warming temperatures and direct sun could increase the likelihood of triggering a wind slab later this afternoon. Although less likely, surface slabs have the potential to step down to deeper weak layers in very steep, north facing terrain features. If this occurs, avalanches may break deeper and wider than expected.

Avalanche Discussion

Today will be a beautiful day in the mountains. The sun will be strong and temperatures will be the warmest they have been in about a week. Small loose snow avalanches were observed in steep south facing terrain yesterday once the sun came out. Expect more shedding to occur today and adjust your travel plans accordingly. 

Small, recently formed wind slabs exist on loaded features at the highest elevations. Be on the lookout for these slabs and remember that small avalanches in consequential terrain can have a bad outcome.

Avalanches are still being triggered on the January Drought Layer. A large avalanche was remotely triggered by skiers two days ago and collapses in the snowpack continue to be reported. These are clear signs that the snowpack is unstable on the north half of the compass. Adjust your travel plans to give avalanche terrain a wide margin of safety on steep north facing slopes.

Please consider submitting an observation here if you are out in the mountains today. Recent observations have been excellent and improve our forecasts. Thank you!

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