Boletín de aludes

East Slopes North

Northwest Avalanche Center
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Peligro de aludes

Thu
Alta montaña
3 · Notable
Límite del bosque
3 · Notable
Bajo el límite
2 · Moderado
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Desactualizado: este boletín caducó 5 months ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Significant recent snow and wind will make it easy to trigger large avalanches at mid- and upper-elevations. It will be especially easy to trigger slides on northerly aspects, at all elevations. Avoid steep slopes with wind-drifted snow just below ridges and cliffs.

Problemas de aludes

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–2

    Watch for red-flag signs of danger, such as fresh slab avalanches, blowing snow, whumphing collapses, and cracks shooting through the snow. Avoid steep, leeward slopes where you find deeply drifted pillows of snow. Even in wind-sheltered terrain, it's a good idea to stick to well-supported slopes and steer around convex roll-overs. Avalanches will be easier to trigger on both shaded northwest-to-northeast aspects and wind-loaded, leeward slopes. Leeward slopes below ridges and cliffs, where the wind drifts slabs, will be most dangerous and could produce avalanches big enough to bury you. 

    The new snow will continue to form slabs over a crust/weak layer, which exists primarily on northerly aspects. Southwesterly winds will be strong and gusty, with the strongest winds overnight, and then picking up a bit on Wednesday afternoon.

    (3/15/2026)

    We watched a small loose slide off the cliffs trigger this mini wind slab avalanche. 

    Photo: Katie Warren

Avalanche Discussion

You can expect another 4-6" of snow with plenty of recent snow to be transported by southwesterly winds. Temperatures should drop significantly and remain cold through Wednesday night.

On Tuesday, middle and upper elevations near the Cascade crest picked up 1-1.5 feet of snow along with southwesterly winds. Observers near Harts Pass reported reactive conditions with natural avalanches running on a crust on northwest-to-northeast aspects. They also reported collapsing and cracking. Southerly aspects were less reactive.

Rain on the 16-20th formed a crust that was then buried by a small amount of dry snow. The weak layer remained on northerly aspects, but it melted on southerly aspects due to the sun on 22-23rd. On Monday, observers reported that the snow melted into the crust below on southerly, sun-exposed slopes. 

The rain of the 16th-20th brought a couple of rounds of wet avalanches, and you may still see some debris under the new snow. Snow cover is thin on southerly slopes and at low elevations. Be aware of exposed rocks and open creeks.

WSDOT has begun plowing operations on Hwy 20 between Silver Star trailhead and Newhalem. The road will be closed to all traffic on weekdays while workers and machinery are operating.

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