Bollettino valanghe

Elkhorns

Wallowa Avalanche Center
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Pericolo valanghe

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Limite del bosco
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Non aggiornato — questo bollettino è scaduto 5 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

The inversion conditions have left overnight temperatures at upper elevations in the mid to upper 30's. With no hard freeze you can expect steep sunny slopes to produce wet loose slides in the early afternoon. Pockets of sensitive wind drifted snow remain on steep east-facing slopes below ridgeline. 

Problemi valanghivi

  • Loose Wet

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

    The inversion has kept overnight temperatures at upper elevations in the upper 30's. The lack of a hard freeze overnight will allow the snowpack to soften rapidly. Daytime warming today could produce wet loose avalanches on mostly south-facing aspects >35 degrees. Look out for signs of wet loose avalanche activity such as pinwheels or roller balls.  If you step off of your machine or out of your boards and sink up to your ankles or more in wet cohesionless snow, then wet loose avalanches are likely in that area and you should avoid terrain steeper than 35 degrees.  

  • Wind Slabs

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

    The wind blew a little harder than forecasted yesterday, especially in the morning. NW winds have created pockets of shallow wind slab below leeward ridgelines.  Expect these wind slabs to be sitting on top of a firm surface, and could be triggered by the weight of a rider.  Avoid areas where you notice signs of wind loading such as rounded pillowy snow drifts, hollow sounding snow, or snow with a rippled snow texture.  While these wind slabs may be small, triggering a wind slab above consequential terrain traps or a long steep slope could have an undesirable outcome.  

Avalanche Discussion

The big news of the day is the lack of a freeze at upper elevations overnight. We are in an interesting weather pattern where cold air is pooling in the valleys and some high mountain basins, but the peaks are experiencing above freezing conditions. When traveling through the terrain today keep an eye on how much you are sinking into the snow. Dig down a foot or so into the snowpack and see if the snow is moist or dry. If you find wet snow to depths of 6" or more, then you should move to more conservative terrain. Avoid and stay out from underneath steep >35 degree slopes where the upper snowpack is unsupportable - sinking in above your ankles - or you observe pinwheels, rollerballs, or shallow point releases.

Be sure to submit your observations. Submit an observation here.  

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