Bollettino valanghe

Salmon River Mountains

Payette Avalanche Center
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Pericolo valanghe

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

In sintesi

Avalanches will be unlikely this morning. As the day progresses and the March sun works its magic, watch for small, wet loose avalanches on steep, south-facing slopes this afternoon. If you're observing wet, unstable snow conditions this afternoon (like rollerballs or sinking into wet snow deeper than your ankles), switch to a different aspect or consider calling it a day. 

Problemi valanghivi

  • Loose Wet

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

    Clear, sunny conditions today will break down surface crusts on south-facing slopes, increasing the likelihood of small, wet-loose avalanches on slopes steeper than 35 degrees. The most unstable snow will likely be on steep, rocky, solar aspects facing S-SW-W. Wet loose avalanches begin at a single point and fan out, collecting debris as they move downslope. They are commonly small but can pack a punch in exposed terrain or push a rider into consequential areas, such as over cliffs, into rocks, or into lower-lying depressions or concavities. 

    CORNICES - Some of these monsters can break off naturally or by the weight of a person. As daytime heating increases, continue to give all cornices a wide margin, and be careful along ridgelines. Cornices can break much farther back than expected. Limit your exposure underneath or adjacent to them. A cornice fall could trigger a larger avalanche breaking deeper within the snowpack. 

    Photo of wet loose avalanches originating from steep, rocky terrain.

    Photo: Brian Peters

Avalanche Discussion

Today will resemble a fairly typical Spring day. Temperatures will be cold this morning, and the snow surfaces will be frozen. As the day progresses, the snow surfaces will begin to soften. As crusts begin to soften, pay attention to how wet the upper snowpack is becoming. This week, the West Central mountains picked up 0.25-1" of rain. Higher totals were recorded in the mountains north of McCall, with lower amounts south. Cooler temperatures over the past 24 hours have helped to "lock-up" the upper snowpack. Beneath surface crusts, the snowpack is still saturated from the recent warm temperatures and rain. Over the last week and a half, we've seen 15-20 inches of snow loss. Winter trailhead access continues to diminish with bare ground growing at lower elevations. 

SLIDING FALLS - Hard, frozen snow surfaces allow for fast travel on foot. These same surfaces can create dangerous conditions in steep terrain without the proper equipment. Crampons and ice axes are a must if you are venturing into steep terrain early in the day, when the surface is frozen. Knowing how to self-arrest will prevent long, sliding falls in consequential terrain. 

If you're out in the mountains, submit an observation on our website or through the Avy App. Tag us #payetteavy

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