Bollettino valanghe

Central Cascades

Central Oregon Avalanche Center
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Pericolo valanghe

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

In sintesi

On Monday it will be possible to trigger a Wind Slab avalanche on north and east slopes where the wind has blown the new snow.  Be wary of steep, convex slopes below ridgelines and behind crossloaded features.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2

    A Wind Slab avalanche was observed on Sunday near treeline on a northeast facing slope.  New snow and windy conditions mean that Wind Slab avalanches will continue to be possible on Monday.  Wind Slabs are created when the wind blows snow onto lee (north and east in this case) slopes where it can be deeper and harder than the snow beneath.  They are most common in open terrain and particularly near and above treeline where the wind can move snow more freely.  However, Strong wind speeds can often load snow further downslope.  Signs of wind loaded snow include: harder snow surfaces, deeper snow, and features like wind lips or smooth pillowy textures.  Cracking in wind deposited snow, and pole probing that reveals weaker snow beneath  are indications of a Wind Slab avalanche character.  Often on these breezy days the best riding is found in the trees and sheltered glades where the new snow remains unconsolidated.

Avalanche Discussion

The new storm snow has provided a welcome refresh to our snow surfaces.  As of Sunday evening, it appears we've received 12-15 cm. of new storm snow in the most sheltered terrain.  Below treeline and in sheltered terrain the new snow appears to be bonding well to the old snow surfaces.  Near treeline a size 1 Wind Slab avalanche was observed on Sunday afternoon.

Regioni coperte