Lawinenlagebericht

Tetons

Bridger-Teton Avalanche Center
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Lawinengefahr

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

Kernpunkte

The likelihood of human-triggered and natural loose snow avalanches on steep slopes will increase as the day warms. These slides are most likely in wind-sheltered terrain during the heat of the day. Triggering an avalanche up to a foot deep is also possible in very steep and wind-loaded terrain at upper elevations. Avoid wind-loaded pockets, get an early start, and move to gentler terrain or colder slopes if you observe the snow surface breaking down.

 

Lawinenprobleme

  • Wind Slabs

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

    Wind slabs continue to build in the alpine, with moderate to strong winds that have shifted direction over the past several days spanning multiple aspects. The wind can weave in and out of rocky features and craft unexpected slabs across complex mountain terrain; expect cross-loaded features and to encounter winded snow on a variety of aspects in the upper elevations.  Sunny and mild conditions expected today may increase the likelihood of triggering a wind slab as the day warms. Most of these avalanches will be small—expect them to be larger as you move higher in elevation/beyond forecast zone boundaries—and could knock you off your feet in exposed terrain. Watch for active loading/cross-loading in unusual places, given the atypical wind direction over the last several days. Avoid very steep slopes with signs of wind loading or visual signs of recent wind transport.

    Per usual, steer clear of being below or too close to the edge of any cornice. March is when these beasts tend to destabilize and trigger larger avalanches on the slopes below.

    (2/8/2025)

    South Fork of Garnet Canyon; recent wind slab activity. 

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–1.5

    Observations noted numerous loose avalanches yesterday. Sunny conditions and mild temperatures will destabilize the snow surface as the day warms, making loose snow avalanches possible on steep slopes ranging from E-S-W. Humans may trigger these avalanches or they can release naturally near exposed rocks/cliff bands. They begin at a point and fan out to collect debris as they move downslope. They are commonly small but can really pack a punch in the wrong terrain or push a rider into consequential areas. These will primarily appear as wet loose avalanches; however, solar-induced dry-loose avalanches can also occur on shady slopes and remain as dry snow but essentially be triggered by the same mechanisms of a wet loose avalanche (i.e., solar input or human movement). 

    Watch for obvious signs that the warm sun is wetting the surface of the snow. Thinly covered rocks and cliffs are the first areas to shed. Small roller balls or pinwheels of moist snow can be an early warning that loose snow slides may follow. Pay attention to what's above you. You can largely avoid this problem by sticking to colder, shaded aspects or lower-angle terrain.

    (3/8/2025)

    Wet loose avalanche activity in the steep/rocky south facing terrain of Avalanche Canyon. We watched this avalanche occur around noon today. Maybe pushing the limits of a D1 avalanche. It would have certainly knocked you off your feet.

    Photo: Bridger-Teton Avalanche Center

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