Bulletin d’avalanche

Central Cascades

Central Oregon Avalanche Center
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Danger d’avalanche

Tue
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Périmé — ce bulletin a expiré 4 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

On Monday it will be possible to trigger an avalanche on South slopes at treeline and above.  Strong North winds on Sunday created Wind Slabs on these South slopes.    Variable amounts of new snow, and increases in wind speed with elevation, mean that potential Wind Slabs could be soft or hard, and have highly variable depth.  Be suspicious of any steep, convex, South slopes at treeline or in the alpine.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2

    Snowfall totals were highly variable throughout our region (I saw reports of anywhere from 1" to 5 or 6").  The North wind had, and was continuing to move snow onto South slopes throughout much of Sunday.  I would expect highly variable depth and consistency of wind loaded pockets with the most sensitive being right at treeline and directly below ridgetops.  Closer to the peaks we could see plumes of snow being whipped up by the wind.  It's hard to know where that snow ended up (if anywhere).  Wind slabs in the alpine are often much harder and deeper.

    There was ample evidence of wind transport on Sunday from treeline and above.  That's enough to make me cautious when approaching steep, convex, South slopes.  Cracking in the surface snow is a great clue that Wind Slabs are sensitive.

Avalanche Discussion

Any avalanche activity on Monday will be directly related to our latest new snow and wind.  We don't have any persistent weak layers of concern in our current snowpack. 

Régions couvertes