Bollettino valanghe

Stevens Pass

Northwest Avalanche Center
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Pericolo valanghe

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

Thursday will be another warm day, and wet avalanches are still the primary concern. As the day heats up and you notice snow surfaces becoming wet or heavy, move to lower angle slopes. Also, watch for overhead hazards such as cornices or rock slabs that may shed heavy chunks of snow onto the slopes below. 

Problemi valanghivi

  • Loose Wet

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

    With plenty of recent snow and continued warm temperatures, both natural and triggered wet avalanches are possible on steep slopes. If you sink in deep to wet snow or begin to notice rollerballs and wet snow that slides easily on underlying crusts, you should move to lower angle terrain. While wet loose avalanches will generally be small and predictable, they carry a lot of mass and can be difficult to get out of if they catch you. In areas where the snow is still dry and at upper elevations with higher recent snow totals, these avalanches could be larger and more dangerous. 

    Cornice falls and glide avalanches are less likely, but if you're in the wrong place, they could be very dangerous. Avoid traveling under large, overhanging cornices,  slopes with open glide cracks, and cliffs still holding slabs of snow.

Avalanche Discussion

The Stevens Pass area has accumulated 1-2ft of snow over the last 48 hours. On Wednesday, Stevens Pass ski patrol reported widespread natural and human-triggered wet loose avalanches. Over the past week, there have also been reports of cornice failures and open glide cracks. At upper elevations, there is likely still cold, dry snow and the potential for wind slabs in steep alpine features. Steer around steep slopes with deep drifts if you observe recent wind slab avalanches or experience cracks that shoot out from your equipment. These avalanches will likely be small and isolated to more complex terrain near ridgelines at the highest elevations.

The spring weather creates dynamic snow conditions. Rapidly changing conditions are a good recipe for avalanches, so watch for quick weather changes such as rain on snow, direct sun, or convective heavy snow showers as a sign to dial back terrain choices. The upper snowpack has transitioned to melt forms, but make sure to monitor how frozen these upper crusts are during the warmer days with limited overnight cooling. If you are punching deeply into wet snow, shed style avalanches from cornice falls, glide cracks, or rock slabs are more likely. 

There is a chance the next storm might impact the area in the late afternoon on Thursday. We expect this to be mostly just an increase in cloud cover, but don't be surprised if you see a few raindrops in the evening. 

Significant uncertainty exists at this time of year as observations become sparse. You can help contribute to the forecast by submitting observations and letting us know what you see in the mountains.

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