Bollettino valanghe

East Slopes Central

Northwest Avalanche Center
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Pericolo valanghe

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

In sintesi

Expect dangerous avalanche conditions at upper elevations near the Cascade crest. Watch for triggering avalanches in the new snow, especially where the wind has drifted thicker slabs. Be ready to asses the snowpack and look for avalanches, recently formed drifts, and cracks shooting through the snow to alert you to the danger. 

Problemi valanghivi

  • Wind Slabs

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

    It will be most dangerous on leeward sides of ridges at upper elevations where westerly wind will drift deeper slabs of snow. Steer around freshly pillowed drifts to avoid triggering an avalanche. Check the bond between the new and old snow. Use caution anywhere that you find the new snow sliding easily or producing cracks that shoot through the snow.

    (11/27/2024)

    Shooting cracks along ridgelines in the Teanaway drainage in late November.

    Photo: Payton Schiff

Avalanche Discussion

You will find very different conditions depending on where you travel in the zone. Areas near the Cascade crest are represented in the danger and problem above. If you travel near Highway 97 and in the Wenatchee Mountains, you will likely find less new snow and less dangerous conditions. Be ready to make your own assessment of the snowpack. Information has been very limited in the western portion of the zone during a period of unique weather and changing conditions. This storm could deliver a total of 1-1.5 feet of snow to the Cascade crest by the end of Sunday. The eastern mountains and Wenatchees will receive in the range of 3-7."

On Saturday, an NWAC forecaster traveled to Hex Mountain. She found a freezing rain crust on the surface below 4,000ft and moist snow above. Very shallow snow cover transitions around 4,500ft with almost 3 feet of snow on the ground at 5,000ft.

On Friday, NWAC forecasters were in the Mission Ridge area. Like many other areas, a thin crust capped southerly aspects and all other aspects remained cold and dry. Weak surface layers abound, even on shaded southerly slopes. Large surface hoar was found in isolated areas. There are crusts in the upper and lower snowpack which could be problematic if they get wet or stressed by a significant load of snow. 

Please let us know what you see in the mountains by submitting an observation. 

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