Bollettino valanghe

Central Cascades

Central Oregon Avalanche Center
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Pericolo valanghe

Sat
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 8 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Human-triggered avalanches are likely on Friday in wind drifted snow at near and above treeline terrain. Significant snow totals and strong winds from the recent storm could result in these avalanches being large, especially on East-facing terrain. If you have uncertainty about the stability of the snowpack, stick to slopes that are less than 30 degrees steep. 

Problemi valanghivi

  • Wind Slabs

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

    On Thursday, I measured up to 3' of recent storm snow that has fallen since Saturday at around 7,000 ft elevation.  That is a large amount of new snow available for transport. Recent and forecasted winds are strong enough to blow this new snow onto leeward slopes and create wind drifts large enough to bury, injure or kill a person. There were reports of small, touchy wind slab avalanches on Thursday at near treeline elevations. I would expect the size of these avalanches to only get larger as you move up in elevation. With Friday's clearing, it will be tempting to expand your terrain vertically and pursue higher elevations. This is where the presence of wind slab will be most likely, and higher consequence. Have heightened awareness for terrain features such as convex rollers or steep slopes below ridges where wind drifted snow is most likely to accumulate. Utilize your ski pole to poke around the snow surface as you travel through terrain and gain an understanding of the presence of a slab- strong snow over weaker snow. Small, no-consequence indicator slopes are a great way to better understand real-time existense of this problem.

    (1/6/2026)

    Small Wind Slab avalanche on NNE slope at 7,200 ft.

    Photo: Gabriel Coler

Avalanche Discussion

Thursday afternoon saw a prolongued riming event at (at least) near treeline and below treeline elevations. The storm snow was noticeably heavier by mid afternoon, and I did not observe any more of the small dry loose sluffs that highlighted the morning skiing below treeline. I therefore expect this warming and riming from Thursday afternoon will have healed any below treeline avalanche problems on Friday. 

Continue to be cautious around cornices. Many ridgetops on the north and east aspects have overhanging cornices. Stepping out onto a cornice may cause it to break leading to a fall onto the slope below.

Regioni coperte