Bollettino valanghe

Snoqualmie Pass

Northwest Avalanche Center
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Pericolo valanghe

Sun
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
3 · Marcato
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Non aggiornato — questo bollettino è scaduto 5 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

The storm may be winding down, but this isn’t the time to get after it. With all the fresh snow, avalanches could easily become large and deadly. Keep it simple and small by sticking to the trees, smaller features, and away from the bigger steep slopes.

Problemi valanghivi

  • Storm Slabs

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

    This has been quite an impressive winter storm. Feet and feet of fresh snow, temperature swings, and strong winds have left several layers within the upper snowpack. There’s just too much fresh powder to test with a hand pit, up track, or small slope. Most of our standard tools probably won’t provide reliable information. The best skill now is patience. All the new snow needs time to heal. 

    Strong winds won’t help matters on Saturday. Even if there’s not much new snow falling, they may transport snow and continue to load leeward slopes. This could result in natural avalanches. These slides would likely be isolated to higher terrain, in chutes, and below cliffs. Think twice before traveling below large alpine slopes. 

    Any storm slab could easily entrain additional snow and grow large and dangerous. This isn’t a normal post storm day. It’s the first day after the biggest storm of the season. Keep it dialed back and away from steep open slopes.

    (3/13/2026)

    Many storm slabs released on or near the 3/12 crust on Friday. 

    Photo: Summit at Snoqualmie Pro Patrol

Avalanche Discussion

It’s been a wild, wet week! Ever since March 8th, an onslaught of precipitation has brought more than 7 inches of water, stacking up more than 4 feet of snow. The snow depths at middle and lower elevations have nearly doubled! And we’re not done yet! Cooling temperatures and more precipitation should keep the snow stacking up at the Pass into Saturday morning. 

With all the new snow, two additional hazards should be on your radar: tree bombs and snow immersion. Keep your partners in sight. You can find more information about deep snow immersion here. 

One lingering question for Satruday is the sky. We think the Pass will stay cloudy, but if the sun makes a meaningful appearance, expect snow to shed. This could result in natural avalanches, especially from large, rocky, southerly terrain. If you start to notice snow falling from rocks or trees, get away from big overhead slopes. 

In all the new snow, there are probably several layers, but the two most prominent are the 3/12 and 3/8 crusts. You can measure all the storm snow by using your avalanche probe to find a very stout layer, likely 4-5 feet (120-150cm) below the surface. The 3/8 is a much weaker layer from a mid storm warmup. It was likely the culprit in many avalanches on Friday. You can find it about 3 feet (90cm) below the surface. Yep, you read that right, 3feet from Thursday to Friday. It’s been one heck of a storm!

Regioni coperte