Bollettino valanghe

Eastside Region

Eastern Sierra Avalanche Center
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Pericolo valanghe

Sat
Alta quota
1 · Debole
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
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Non aggiornato — questo bollettino è scaduto last year. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Assess for signs of wet snow instability as daytime warming occurs. Rollerballs coming from steep, rocky, or vegetated slopes are the first warning signs. Use caution when entering steep terrain at higher elevations where wind-hardened surface snow could break unpredictably. 

Problemi valanghivi

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–1.5

    A combination of warm temperatures, light wind, and increasing cloud cover means wet surface snow could develop on steep slopes near and below treeline. Watch for signs that wet snow is becoming unstable.

    Rollerballs or pinwheels and sinking deeply into wet snow are signs of instability that often foreshadow larger point-release avalanches. Rocky terrain, steep vegetated slopes, and areas with shallow snow cover will warm the most. Wet Loose avalanches often fail from a single point and entrain heavy snow as they move downhill. Travel early when the snow surface is colder. Plan your trips to avoid crossing on or under very steep slopes in the afternoon. Move to colder slopes or lower slope angles once the snow surface turns slushy. Avoid steep slopes above terrain traps, cliffs, and sustained steep pitches.

    (3/20/2025)

    Small skier triggered wet loose avalanche in steep E facing terrain.

    Photo: Mike Phillips

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    1–2

    Strong southwest wind on Wednesday night redistributed and stiffened snow on open slopes. There was more loose surface snow available for transport in the northern half of the forecast area, where blowing snow was more widespread. Recently deposited drifts and cornices became less sensitive yesterday. 

    Hard wind slabs can catch you by surprise, cracking from the edges where they’re softer and thinner. They can break above you. It’s worth assessing for textured, hollow snow in steep, exposed terrain. Use caution in chutes and gullies and on the leeward sides of ridgelines. Shooting cracks and collapsing in drifted snow are warning signs to dial back your slope angle or seek out softer snow in wind-sheltered areas.

    (3/20/2025)

    Small wind slab failed on a small wind roll.

    Photo: Eastern Sierra Avalanche Center

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