Bollettino valanghe

Central Cascades

Central Oregon Avalanche Center
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Pericolo valanghe

Sat
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
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Non aggiornato — questo bollettino è scaduto 4 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Triggering wet snow avalanches will be possible at all elevations, especially on steep slopes in the direct sun during the warmest time of the day. If you notice the surface snow beginning to feel wet or mucky, or if you see rollerballs, consider moving to more shaded slopes or lower angle terrain. Triggering avalanches in recently wind drifted snow will also be possible near treeline and above treeline.

Problemi valanghivi

  • Wind Slabs

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

    Wind slabs will be trending toward stubborn to trigger, but lets give this one a little more time before writing it off. On Thursday, I encountered cracking in wind slab on a small northeast facing test slope near treeline.

    Most wind slab avalanches will be small but there could be isolated pockets of terrain with deeper deposits that could lead to large avalanches. Utilize low angle terrain or small test slopes to check depth and reactivity of wind slabs before you commit to big steep slopes. The old snow surface under the recent snow is a great reference point for checking out the depth of wind slabs. As wind deposits get deeper, avalanches can become larger. If you see cracking in the slab or recent avalanches, these are good indicators of unstable snow.

    (4/23/2026)

    Cracking in wind slab on a small test slope. NE aspect near treeline.

    Photo: Aaron Hartz

  • Loose Wet

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

    Most wet snow avalanches will be small, but avalanches on big steep slopes could entrain enough snow to increase in size. There will be timing involved with this problem. As the day heats up and slopes are exposed to the sun's energy, wet snow avalanches have the potential to come into play.  This problem will be more prominent  on steep slopes in the direct sun. Keep an eye on changing surface condtions. As the surface snow begins to feel wet or mucky, if you see rollerballs or pinwheels, or if you see recent wet snow avalanches, recognize these as signs this problem is in play. When you see these signs, consider moving to more shaded slopes or lower angle terrain.

Avalanche Discussion

Be cautious in sustained steep terrain. It does not take much moving snow to knock you off your stance on steep slopes.

Keep a lookout for cornices at ridgetops especially in the upper elevations. Be cautious when approaching ridgetops and avoid walking out onto a cornice. They can break under the weight of a person and send you falling onto the slope below. 

Regioni coperte