Boletín de aludes

Snoqualmie Pass

Northwest Avalanche Center
Ver en el mapa

Peligro de aludes

Tue
Alta montaña
2 · Moderado
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
Open full map
Desactualizado: este boletín caducó 2 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

We just wrapped up a storm that brought a winter refresh to Snoqualmie Pass. Expect deeper snow and more avalanche potential as you ascend in elevation, particularly in areas exposed to wind. Down low, you may find tricky travel conditions and a multitude of early-season hazards.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–1.5

    On Monday, you’re more likely to trigger an avalanche in areas where the wind drifted the new snow into deeper drifts. Wind slabs commonly form along the leeward side of ridgelines, at the base of cliffs, or in confined chutes/gullies. Approach these areas cautiously and look for visual clues such as pillow-like drifts, textured surfaces, or fresh cornices to help determine if wind-loading may be present. 

    (12/8/2024)

    Visual clues such as actively blowing snow, fresh cornices, or pillow-like drifts can help identify wind-loaded slopes to avoid.

    Photo: Andy Harrington

Avalanche Discussion

After a warm and wet start to the weekend, Snoqualmie Pass received a much-needed shot of snow on Sunday - blanketing mid and upper elevations and creating the 12/7 interface. Close to a foot fell at the top of Alpental. Lower elevations were a mixed bag, with rain, freezing rain, and snow all recorded throughout the weekend.

You could find that mountain access is difficult, with exposed rocks, open creeks, and other early-season conditions down low. If you persevere, increasing snow depths and a more winterlike scene await you as you travel through mid and upper elevations - accompanied by more avalanche potential.

Unfortunately, this barrier to entry has limited the amount of observations within the zone. Apart from a public observation about a ski party at Summit West on Sunday, we are relying mostly on weather station information and reports from neighboring zones. Help us out by submitting your observations.

Before this weekend’s storm, weak snow on and near the surface was observed throughout the Cascades. With rain well over ridgecrest on Saturday (and freezing rain down low), the majority of these weak grains were likely destroyed. Still, keep it in the back of your mind if you venture toward high-elevation shaded slopes, particularly in the eastern half of the zone. Similarly, the rain may have seeped toward the bottom of the snowpack and kicked off glide activity on rocky ledges. Don’t linger under precariously hanging blocks of snow or large cracks.

Regiones cubiertas