Lawinenlagebericht

Snoqualmie Pass

Northwest Avalanche Center
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Lawinengefahr

Sat
Hochgebirge
2 · Mässig
Waldgrenze
2 · Mässig
Unterhalb
1 · Gering
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Veraltet — dieser Lagebericht ist last year abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

Sunshine and warm temperatures will probably need to break down a new crust before wet loose slides become an issue. Once the snow surface turns wet and sticky, avalanches may occur on nearby steep slopes. The heat will also weaken cornices and blocks of snow on rocky faces. These could shed without warning.

Lawinenprobleme

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–2

    Clear skies Thursday night should let any wet snow freeze, despite the warm temperatures. If this happened, there won’t be much of a wet loose hazard to start the day. As the surface thaws, the chance for wet loose slides will increase. This will happen on various slopes and aspects at different times. 

    Monitor how the surface changes during your travels. Wet sticky snow, rollerballs, and nearby loose avalanches should all indicate this problem is becoming more likely. Most wet loose avalanches should remain small and manageable. However, on long, steep slopes, these slides may run far and grow large and dangerous. 

    Expect the snow around rocks to warm faster than other slopes. You may see natural wet loose slides coming from this terrain. Pay attention to what’s above you, and don’t linger under rocky slopes basking in the sun.

    (4/3/2025)

    Lots of small rollerballs in the 1-2" of new snow. 

    Photo: Katie Warren

Avalanche Discussion

Friday’s weather sure looks very spring-like with plenty of sunshine, light winds, and warm temperatures. However, the snowpack and mountains haven’t fully transitioned to spring. The Pass picked up around a foot or so of snow over the past week. You can measure the recent snow by seeing just how much sits over the March atmospheric river (AR) crust. Periods of mild temperatures and sunshine helped ease this wintery snow into our current spring weather, decreasing the shock to the system. 

These spring transition periods are always tricky and include a few surprises. Despite the date on the calendar, the middle and upper elevations still look like winter. Snow clings to rocky faces and a few cornices still loom along ridgelines. The longer the warm weather goes, the more likely these “shed-style” avalanches become. Keep an eye out for what’s above you. Limit any time you spend under these unpredictable overhead hazards. 

At lower elevations, spring has sprung; the snowpack thinning, bare ground emerging, and creeks opening. This is particularly true on southerly slopes where there may not be sufficient snow for an avalanche. Even if this reduces the avalanche risk, it increases the travel hazard.

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