Bollettino valanghe

West Slopes Central

Northwest Avalanche Center
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Pericolo valanghe

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

In sintesi

More snow and wind could be enough to increase avalanche danger at upper and middle elevations. Look for and assess freshly drifted snow and have options to stay off of steep and wind-exposed slopes. You may encounter moist, recent snow at low to middle elevations. 

Problemi valanghivi

  • Wind Slabs

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

    There are a couple of variations on wind slab that you could find tomorrow. One would be older slabs that formed in the past 2 days. The other kind would be fresher slabs that are actively forming. These would trend toward being shallower but more sensitive to triggering. 

    If it’s windy, drifting snow will show you which slopes are loading up. These are the slopes that you would want to avoid, at least where they're steeper than 35 degrees. Track changes in snow depth, texture, and stiffness as you gain elevation and change aspects. Hand shear and stomping on test slopes or wind lips can provide information about the reactivity of fresh slabs.

    (1/2/2025)

    Obvious signs of wind transport along this exposed ridge pointed toward potentially loaded slopes. 

    Photo: Dallas Glass

Avalanche Discussion

At the time of publishing, forecasts call for roughly 6" of new snow by the end of Wednesday. This will add to the snow that fell from the 9-10th and bury recently formed wind slabs. Rain and wet snow will fall at low elevations. You may encounter wet snow and possibly isolated shallow wet slides.

On Monday, snow totals ranged from 6-12" of snow. The Decline Creek snotel added 1.4" of precipitation overnight, with other weather stations seeing a bit less. In the Foss River drainage, observers reported triggering very sensitive, but isolated avalanches in the new snow on leeward slopes. Similar to reports from the West North zone, these avalanches have us suspecting a layer of buried surface hoar at the 3/9 interface on upper elevation shaded slopes. 

Regioni coperte