Boletín de aludes

Mt Hood

Northwest Avalanche Center
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Peligro de aludes

Sun
Alta montaña
2 · Moderado
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil
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Desactualizado: este boletín caducó 5 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Small natural or human-triggered wet loose avalanches are possible on any steep sunny slope above treeline as the freezing level continues to push higher Saturday.  Low avalanche danger doesn't equal zero hazard; avoid extreme terrain features at lower elevations where you find wet surface snow. 

Problemas de aludes

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1

    With mid-mountain temperatures remaining above freezing Friday night, expect any refreeze of the surface snow to quickly break down Saturday morning.  This will be the warmest day yet above treeline.  Steep sunny slopes at higher elevations that haven't released small wet loose avalanches or rollerballs may be ready to slide on Saturday naturally or with your help. 

    Small avalanches can be triggered in isolated areas during Low danger.  Avoid extreme terrain features at lower elevations where you find wet surface snow. 

    At any elevation where you yourself sinking into wet surface snow, change aspects or choose lower angle terrain.  Signs of pinwheels or rollerballs releasing below rock faces will tip you off that the odds of a wet loose avalanche have increased on similar slopes.  Wet snow avalanches that begin small will pick up steam on larger steep sunny slopes.  Take care near terrain traps, even small wet loose avalanches can pack a punch and knock you off your feet. 

    (3/12/2021) Recent small, natural Wet Loose avalanches and rollerballs have released over the last several days due to sunshine and warm temperatures in the White River drainage. Photo: Peter Moore

Avalanche Discussion

Small wet loose avalanches and rollerballs were been reported in Clark, White River and Salmon River drainages near or above treeline over the last few days.  Saturday should be the warmest day so far in this stretch of spring-like weather.  About 3-4" of recent snow from earlier in the week overlies a melt-freeze crust on most aspects and elevations.  You are most likely to see small natural wet loose avalanches above treeline as the freezing level pushes up to 9000' Saturday.   

The last major storm event ended on February 27th with drier conditions interspersed with light snowfall events through the beginning of March.  In the upper snowpack, you can still find a distinct freezing rain crust buried on 2/22.  This layer was the last interface that larger avalanches released down to in the Mt Hood area towards the end of February and the first few days of March.  

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.

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