Boletín de aludes

Banner Summit

Sawtooth Avalanche Center
Ver en el mapa

Peligro de aludes

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

Lo esencial

The avalanche danger is LOW and large avalanches are unlikely. Your main avalanche concerns involve the new snow from the past week. Be on the lookout for sensitive pockets of wind-drifted snow near ridgelines; cracking in these drifts is an indication of instability. Small loose snow avalanches will be easy to trigger on very steep slopes, particularly where the sun is melting the snow surface. Triggering large avalanches that fail on deeper weak layers is unlikely, but the consequences would be grave. 

Avalanche Discussion

Your primary avalanche concern today involves the 15-20 inches of snow that fell over the past week. Roughly half of this fell last weekend, with the other half falling on Thursday. Stiff, icy crusts underlie this recent snow on slopes that tilt towards the sun. Observations indicate that this recent snow has generally bonded well to the surfaces it fell on. Here's what to be looking for while you are out in the mountains today:

  • WIND SLABS: Look for these along ridgelines and in cross-loaded gullies. Cracks shooting out from your skis, board, or machine are an indication that the slab you've found is not well-bonded. 
  • DRY LOOSE: Thursday's storm graced this area with up to a foot of new snow. On shaded slopes, this new snow did not get cooked by yesterday's sun and you'll find some excellent skiing and riding. You will also be able to trigger small, fast-moving sluffs if you are playing on slopes steeper than about 40 degrees. 
  • WET LOOSE: Late-March sunshine is powerful. Direct sun will melt the snow surfaces and bring on the possibility for wet loose avalanches. Cool temperatures and intermittent cloud cover should limit the impacts of this problem, but if you're encountering wet snow on a steep slope, triggering these slides is possible. Most of the natural wet snow activity likely occurred yesterday, but if today is warmer or sunnier than forecast you may see small, natural wet loose avalanches today. 

The three avalanche types described above will be fairly easy to identify and manage. These types of slides aren't likely to be large enough to bury you, the main hazard they present will be if they knock you off your feet or machine in unfriendly terrain. Deeper weak layers have become unreactive in this zone. The most recently observed large slab avalanche that failed on buried persistent weak layers near this zone occurred nearly a month ago on March 2nd. You'd have to get unlucky to encounter one of these beasts in this zone, but if you did it would be in very steep, rocky, wind-swept alpine terrain. 

As the danger drops to LOW, many of us find ourselves drawn towards bigger, steeper, more complex terrain. When we head into this terrain, we enter a dangerous environment, even when the avalanche conditions are generally safe. Catching an edge, crossing your ski tips, or losing control of your machine on a steep, firm slope can all have severe consequences. This is also the type of terrain where you are most likely to trigger a slide that can knock you off your feet. If this is the type of terrain you are headed for today, remember to keep things tight. Travel one at a time, keep your eyes on your partners, and make a plan for how to move safely through the terrain. Respect the environment you are traveling through and remember that avalanches are only one of the hazards posed by the mountains.  

Regiones cubiertas