Bollettino valanghe

Stevens Pass

Northwest Avalanche Center
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Pericolo valanghe

Sat
Alta quota
1 · Debole
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
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Non aggiornato — questo bollettino è scaduto 4 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Warming temperatures and full sun may create loose avalanches on steep sun-exposed slopes.  Watch signs of danger such as rollerballs and snow surfaces melting and becoming weak. You may be able to find lingering slabs of wind-drifted snow on select upper elevation slopes. 

Problemi valanghivi

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–1.5

    Watch for triggered and natural avalanches on steep, sun-exposed slopes, especially near rocky features. Natural avalanches could come from steep overhead slopes. Monitor these areas for signs of instability like rollerballs or other fresh avalanches. Another indicator is the sun melting the surface snow. Time your travel and give yourself options to avoid steep slopes once they've received prolonged sun.

    There's uncertainty around exactly how much the surface snow will warm and where that will occur. Cold temperatures, wind, or clouds could all keep wet loose avalanches at bey. Snow surfaces may stay cold enough to limit avalanches on higher elevation slopes

    (2/21/2022)

    Loose avalanches on a sun-exposed slope near Jove Peak. 

    Photo: Public obs

Avalanche Discussion

The east wind drifted slabs in unique locations at upper elevations on Tuesday. Wind slab avalanches were isolated earlier in the week. Locations like Tye Peak and the moonlight area saw wind loading but other ridgelines that are sheltered from the major east-west running valleys, such as Josephine Peak or Arrowhead Mountain, may not have seen as much wind effect. Now, these avalanches are getting difficult to trigger.  If you see cracks shooting through the snow, or stiffer, sculpted surfaces consider the consequences of triggering a slide.

Throughout the week, a handful of small point release avalanches were reported on steep slopes on both sunny and shaded aspects. Overall, slope testing and snowpack tests have consistently shown a good bond at the Feb 19th and Valentine's crust interfaces. On mid to upper elevation shaded, northerly aspects, you may be able to find weak snow near these thin, rough crusts about 2.5-3 feet below the surface.

Regioni coperte