Bollettino valanghe

Mt Hood

Northwest Avalanche Center
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Pericolo valanghe

Sun
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
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Non aggiornato — questo bollettino è scaduto 6 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Give your attention to the fresh snow on the surface. Wind deposited snow may still produce avalanches on lee slopes. Navigate around slopes where you find wind deposited snow and where sunshine and warm temperatures affect the snow surface stay away from slopes over 35 degrees.

Problemi valanghivi

  • Wind Slabs

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

    If you travel near or above treeline, you'll likely find firm wind stiffened snow on a variety of aspects due to the strong-extreme W-NW winds Monday night and Tuesday.  Several natural D1-2 (large enough to bury a person) wind slabs were observed Wednesday on steep, north and east facing terrain. Wind slabs may still be reactive to human triggering where they've bonded poorly to the most recently formed crust. 

    You can test the bond of the new snow to the crust on small test slopes. Sticking to wind-scoured ridgelines and to slopes less than 35 degrees will help you avoid the problem Thursday.  

    Example of cracking in a fresh wind drift on a small test slope.

Avalanche Discussion

After 7 inches of rain over the weekend, it was surprising that very little evidence of natural avalanches was observed over the last few days. Monday, professionals reported water had penetrated down 3 ft (1m) in the snowpack at 6600' and below.  Recent snow from Monday and Tuesday morning is generally well bonded to the old rain-soaked surface snow. A layer of weak snow is buried below the rain crust formed on 12/9/20, but it has been moistened by the weekend's rain and should heal quickly. Give your attention to the recent snow, either wind affected or sun/warmth affected depending on your elevation.

During the ongoing Covid-19 pandemic, continue to follow the latest guidance from local, state, and federal health officials. Avoid unnecessary risks that could impact first responders and stress medical resources.  Wear a mask when appropriate, practice social distancing, and consider recreating closer to home.

Regioni coperte