Boletín de aludes

Banner Summit

Sawtooth Avalanche Center
Ver en el mapa

Peligro de aludes

Tue
Alta montaña
1 · Débil
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil
Open full map
Desactualizado: este boletín caducó 4 years ago. Estás viendo condiciones pasadas, no el boletín vigente.

Lo esencial

Generally stable avalanche conditions exist and large avalanches are unlikely. Look for areas where the wind has built small drifts and slabs out of the new snow from the past few days. Small slides that knock you off your feet or machine in rocky, treed terrain can carry high consequences.

The Avalanche Danger will increase significantly overnight as an intense storm brings strong winds and new snow. Avalanche Danger will likely reach CONSIDERABLE by tomorrow morning and large natural and human-triggered avalanches will become possible.

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely
    Tamaño
    1–1.5

    The combination of new snow and wind has built small slabs in exposed terrain. These slabs will grow in size and distribution today as the wind continues to transport snow. Though small, these slabs may be large enough to knock you off your feet and send you down the slope. Look for them in upper elevation terrain along ridgelines and on the sides of mid-slope gullies and ribs. Dune-shaped drifts and textures on the snow surface like waves and ripples are signs that the wind has been at work, as are fresh cornices along ridgelines. Cracking and collapsing are clear indicators that you've found an unstable slab. Consider the consequences of being swept off your feet and carried through the terrain you are in. Small slabs can carry high consequences if they drag you through trees or over rock bands. 

    Fresh slabs are building on a variety of weak surfaces that developed over the past several weeks. This weak snow may make today's thin slabs a bit more reactive to your weight than they would be otherwise. In areas sheltered from the wind, it will be possible to trigger small loose snow avalanches involving the new snow and the weaker facets underneath. These are unlikely to bury you, but may be able to knock you off your feet and send you downslope.

    ADDITIONAL DISCUSSION: Weak layers buried in the upper 2 feet of the snowpack have become unreactive, thanks to an extended period without significant loading. If you are unlucky enough to find the "sweet spot" where these layers remain reactive you'll almost certainly be in rocky, wind-affected terrain steeper than about 35 degrees where recent drifting has added weight to these layers. These layers appear to be worse on slopes that directly face the sun where crusts+facets are buried.

Avalanche Discussion

LOW Danger and Changing Conditions

Today will start much like the past few days have, but our world of snow will look quite different by tomorrow morning. Much of today's forecast rests on the timing of the incoming storm. If the storm arrives late in the day, as forecast, it won't have a significant impact on today's Avalanche Danger. However, if snowfall gets here a bit earlier we may see Avalanche Danger beginning to creep up during the daylight hours. Fortunately, this will be easy for you to recognize and manage in the field. Pay attention to how much new snow is accumulating. If you are seeing more than about 4-6" of new snow you can expect that freshly forming slabs are growing in size and distribution, and are becoming easier to trigger. Look for shooting cracks as an indication that you've found an unstable slab. 

You can get caught up on what happened last week by watching our latest Weekend Update. 

Regiones cubiertas