Bollettino valanghe

Central Cascades

Central Oregon Avalanche Center
Vedi sulla mappa

Pericolo valanghe

Fri
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
Open full map
Non aggiornato — questo bollettino è scaduto last year. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

The primary avalanche danger on Thursday will be related to overnight above freezing temperatures and rain at lower to mid elevations. Triggering wet snow avalanches will be possible on all aspects and avalanches can be large, especially on long sustained steep slopes. If the upper snowpack is wet and slushy to boot top depth or more, it will be best to avoid sustained steep slopes. As snow begins falling later in the day, it will be possible to trigger avalanches in new wind drifts near treeline and above treeline.  

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–1.5

    This problem will not come into play until we get at least a few inches of snow accumlation. If you are out in the late afternoon you may encounter new shallow wind slabs on lee terrain features. Wind slabs will mostly be small but watch for those pockets that accumulate more blowing snow. Monitor the depth of new wind slabs. 3" of new snow can turn into a 15" wind slab as wind blown snow accumulates on lee terrain features. 

  • Loose Wet

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

    Lower elevations will have above freezing temperatures overnight. That combined with rain during the night and into the day will keep wet loose avalanches on the list. I expect this problem to be more prominent below treeline and at the lowest elevation areas in the forecast zone. The mid elevations could get some rain overnight and into the morning. Use your evaluation skills to determine if this problem is present. If the upper pack is not wet and slushy, then the problem is not there. Most wet loose avalanches will be small, but if you observe the snow becoming wet and slushy to boot top depth or more, then avalanches could become large especially on long sustained steep slopes.

    Wet slabs are also possible at the lower elevations. 

    (3/26/2025) Photo: Aaron Hartz

    On Wednesday I observed many recent natural wet loose avalanches. All were small and in steep terrain on slopes in the direct sun.

Avalanche Discussion

Many of the large cornices broke off during the last few days, but there are still some that are hanging on. Lowering temperature and increasing clouds will decrease the chances of natural cornice breaks. Cornices could still come into play if they are getting rain soaked. Continue to use caution when approaching ridge tops and avoid walking out onto a cornice and don't linger underneath them. 

Regioni coperte