Bollettino valanghe

East Slopes North

Northwest Avalanche Center
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Pericolo valanghe

Sun
Alta quota
1 · Debole
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
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In sintesi

While avalanches are generally unlikely, there's a slim chance that you may be able to trigger small wet avalanches in very steep terrain. Don't linger underneath cornices and use caution above cliffs where even small avalanches could be dangerous. For Saturday, expect warm temperatures, clouds and a chance for light rain by evening.

Problemi valanghivi

  • Loose Wet

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

    It may be tough to trigger wet avalanches on Saturday. You may encounter areas of weak, wet snow. If you sink into wet snow up to your boot-tops, move to slopes under 35 degrees. Consider the consequences of a cornice fall while warm weather continues. We've received recent observations of large, cornices breaking and triggering avalanches. Minimize your time underneath lingering under large overhung features.

    Surfaces that froze on Wednesday and Thursday nights could melt from warm temperatures and light rain. Some surfaces above treeline may stay supportive and firm. The snowpack is still transitioning to melt forms which adds uncertainty during this prolonged warm weather. 

    (3/22/2022)

    Large (D1.5) wet loose avalanche in one of the main Cutthroat paths above Hwy 20.

    Photo: Andy Harrington

Avalanche Discussion

A widespread natural wet loose avalanche cycle occurred on Tuesday near Washington Pass. On wind-sheltered NW-NE aspects near and above treeline, observers found near-surface facets 1-2 feet below the surface and often on a crust. This layer was the source of persistent slab avalanches near the Mount Baker ski area and other parts of the Cascades. A layered, winter snowpack still exists on these higher elevation northerly aspects. Even though the avalanche danger is low, it's worth digging to look for any weak snowpack structure before committing to steep terrain. 

A deeper persistent weak layer still exists in the zone that was responsible for avalanches in early March. The layer can still be found about 3 feet deep, sandwiched between eroding crusts on NW-NE aspects near and above treeline and has been particularly problematic in the Harts Pass area. The most recent of these occurred on March 9th in Allen Basin. While triggering an avalanche on this layer (the late January facets) is very unlikely, the consequences could be serious. You can limit your exposure to shallow, rocky areas and steep and unsupported slopes. See the avalanche occurrence database for more details.

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