Bollettino valanghe

Snoqualmie Pass

Northwest Avalanche Center
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Pericolo valanghe

Sun
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
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In sintesi

Although temperatures are colder, large wet avalanches are still possible in Snoqualmie Pass. You could trigger one on a steep slope, but you could also get hit by a slide from above you. Timing and location of these avalanches are hard to nail down, so limit your time on or beneath slopes and rocky terrain that could produce one. 

Problemi valanghivi

  • Wet Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1.5–2.5

    Large wet slab and glide avalanches are possible on Saturday. It's been a very rainy week in the Pass, and the snowpack shows it. Dig down anywhere, and all you will find is saturated, mushy snow. While the surface may turn firm and supportable on Saturday, deeper layers will take longer to refreeze and stabilize. These avalanches are becoming less frequent, but the problem is not gone. If triggered, they could be large and deadly.

    It's difficult to determine when and where these avalanches will occur, and using small slope tests will not provide adequate assessment. Instead, address this problem by choosing the proper terrain and travel technique. Start with smaller, lower-angle terrain, and work up to steep slopes. Watch for warning signs such as recent avalanche activity, deep cracks in the snow, or punchy, unsupportable conditions; these are good reasons to stick to low-angle terrain. Limit your time on or beneath steep slopes or rocky features.

    (3/18/2026)

    A glide avalanche on Rockface at Alpental. It occurred on Wednesday morning. Similar slides will be front and center as rain continues throughout the week.

    Photo: Andy Harrington

Avalanche Discussion

Snoqualmie Pass gained over 2.3 inches of rain in the last 24 hours. No new avalanches were reported on Friday, but this could just be a lack of observations in the rainy weather. On Thursday, observers near Source Lake found multiple large wet avalanches that released naturally. The debris covered the entire Fan and part of the Bryant Coulior runout. Two separate glide avalanches were also spotted in the last couple of days.

At long last, the warm temperatures and high-elevation rain are coming to an end. Cold air will move in over Snoqualmie Pass Friday night, bringing snow levels back down to low elevations. Unfortunately, by the time the cold air arrives, most of the precipitation will have passed. Low elevations are likely to get a dusting of snow, while the uppermost elevations could see a couple of inches. 

The current snowpack is made up of rain-soaked snow and melt form, reaching deep beneath the surface. As it gets cold, the surface snow will likely turn firm and treacherous. Travel cautiously; it doesn't take much to fall in conditions like this.

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