Bollettino valanghe

Stevens Pass

Northwest Avalanche Center
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Pericolo valanghe

Wed
Alta quota
2 · Moderato
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 6 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Winds will create shallow slabs in exposed terrain features during the afternoon. Use caution in steep terrain near ridgelines, where even a small slide could cause injury. Expect a slippery or breakable crust under a few inches of snow in most areas.  

Problemi valanghivi

  • Wind Slabs

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

    Southeasterly winds will pick up during the afternoon, and blow through the pass. These are expected to drift the recent snow into reactive, shallow slabs in exposed areas. You are most likely to trigger one near exposed features and ridgelines at upper elevations. Slabs should be shallow and fairly isolated in the terrain, as there isn't all that much new snow to transport. Use caution on steep slopes near ridgelines or crossloaded gully features, places where even a small slide could cause injury. Stay alert to changing conditions, and look for signs of wind drifting snow such as plumes coming off ridgelines. Heed signs of instability such as shooting cracks in cohesive drifts of snow, and aim to avoid any wind loaded pockets on steep slopes. 

    Example wind slab

Avalanche Discussion

3-5 inches of soft snow is sitting on a slick crust and may slide easily. On Monday, an observer on Arrowhead Peak found the new snow to be poorly bonded to the underlying crust, and easy sluffing on steeper slopes. Observers have reported surface hoar and facets above the crust. Surfaces could be slick and even dangerous on steep slopes. Use caution where you could slide a long way or hit rocks, trees, or cliffs. 

The most recent avalanche activity we know about was last Friday, when observers reported small loose avalanches on steep, sunny slopes near treeline. It's been almost two weeks since our last major storm and avalanche cycle. You can see still see the evidence of some of these avalanches. On the 18th Josh Hirshberg checked out a slide from the historic Wellington path on Windy Mountain. This slide was easily big enough to break mature trees or bury a car. The debris piles were over 12 feet and deeply gouged in places. 

During the ongoing Covid-19 pandemic, continue to follow the latest guidance from local, state, and federal health officials. Avoid unnecessary risks that could impact first responders and stress medical resources.  Wear a mask when appropriate, practice social distancing, and consider recreating closer to home.

Regioni coperte