Bollettino valanghe

East Slopes South

Northwest Avalanche Center
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Pericolo valanghe

Fri
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 5 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

You can trigger a large avalanche in wind-drifted snow at upper elevations. Steer around wind-loaded slopes greater than 35 degrees, especially in areas closer to the Cascade Crest. Shallow snow cover will continue to create challenging travel and increase the consequences of even a small avalanche.

Problemi valanghivi

  • Wind Slabs

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

    Light snowfall and shifting winds continue Thursday, creating fresh drifts and thickening existing slabs.  Avalanches will become larger and more sensitive to triggers as you climb up in elevation, especially in areas with a deeper snowpack further west in the zone. Pay attention as you transition into wind-affected terrain and use caution around ridgelines, rollovers, and rocky outcrops. Evaluate snow and terrain carefully and look and feel for signs of wind-loading like cornices and changes in snow surface texture and hardness. In wind-sheltered areas, you may find unconsolidated snow with loose dry sluffs possible on steep, unsupported slopes.

Avalanche Discussion

Since 12/8, 2-4ft of new snow fell throughout the East South Zone. We have limited observations and a lot of uncertainty about snowpack conditions near and above treeline. In areas near the Cascade Crest, a layered winter snowpack is developing. Far to the east and at low elevations, snow cover is shallow, and below the threshold to produce avalanches. On shady aspects at upper elevations, the snowpack may be building on weak, sugary, old snow. The variability may be the biggest challenge. Gather information as you travel and pay attention to changes with aspect and elevation. If you observe recent avalanches, shooting cracks, or collapses, move to simple, low-angled terrain.

We are excited about issuing daily forecasts for the East South zone this season, but we need your help in making this successful. If you get out in the mountains this winter, please send us your observations.  - The team at NWAC 

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