Lawinenlagebericht

Tetons

Bridger-Teton Avalanche Center
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Lawinengefahr

Sat
Hochgebirge
2 · Mässig
Waldgrenze
2 · Mässig
Unterhalb
1 · Gering
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Veraltet — dieser Lagebericht ist 3 years ago abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

Human-triggered avalanches are possible today. Yesterday in the upper and middle elevations wind slabs were sensitive given the new snow and gusty west and south west winds. In areas that received higher amounts of snow, like the west side of the Tetons, expect fast-running sloughs in steep terrain where the snow rests upon harder interfaces. If the sun presents itself, expect widespread wet loose activity. Be mindful as you approach avalanche terrain of how the new snow has bonded and use test slopes to gauge its reactivity. Watch for sagging cornices, while hazards in themselves, they can also fail and trigger additional slides.

Lawinenprobleme

  • Wind Slabs

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

    Snow totals varied from the east and west sides of the Tetons - several inches at Rendezvous Bowl and Suprise Meadow and near 2 feet at Chief Joseph, Targhee. Gusty winds from the west and southwest allowed the formation of wind slabs throughout the day yesterday, and there were reports of sensitive wind slabs in the upper and middle elevations near Targhee and on Mt. Glory. You are most likely to find this problem on leeward-facing slopes and terrain features. If you are traveling in avalanche terrain that was on the receiving end of higher snowfall totals, expect to find larger and more connected wind slabs. In these areas, these slabs could be large enough to injure or bury someone in specific terrain features. 

    (3/21/2023)

    A photo from earlier this spring, that highlights small steep test slopes and reactive storm snow. 

    Photo: Drinkard

  • Loose Wet

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

    Mountain weather in the spring can be unpredictable. Anytime there is substantial cold snow on the ground, that has yet to greet the warm April sun, we need to be cognizant that it won't take long for the sun's heat to impact the freshly fallen snow. Cool temperatures, cloud cover, and some forecasted snow showers in the afternoon are expected to keep this problem at bay. However, if the sun emerges from the clouds expect wet loose activity to be on the rise, both naturally and human-triggered.

    (4/10/2023)

    Wet loose and wet slab avalanches on SW-facing terrain above Jackson at low elevations. 

    Photo: Antonioli

  • Loose Dry

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

    It's hard not to rule out the potential for dry loose issues in steep terrain where the height of new snow is nearly 2ft. If you're recreating in these areas and are approaching steep constricted terrain have an exit strategy at the top of your line and plan accordingly. This new snow is resting on a variety of surfaces that may act as an ideal bed surface. 

Avalanche Discussion

There's a children's storybook called Ollies Ski Trip, in which a young boy thanks King Winter for finally bringing winter weather while out skiing through the forest. His sentiments bring forth an imaginary tale of Jack Frost and King Winter as well as Mrs. Thaw - who tries to stamp out and sweep the winter away. It was hard not to feel like a child again yesterday, skinning and skiing cold powder after the recent heat wave. The mountains, specifically the west side of the Teton range picked up an impressive amount of snow, nearing two feet. With that comes a litany of problems and traveling in the mountains today warrants a little more attention given the recent snow and gusty winds. Aside from the wind slabs and potential fast-running sloughs in steep terrain, is the lurking possibility of the sun in its high April angle - ahem, Mrs. Thaw. If the sun emerges today expect widespread wet loose activity.  And with nearly two feet of cold snow, it would be an issue I wouldn't want to tangle with in avalanche terrain - be it today or tomorrow when high-pressure returns to the area. 

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