Boletín de aludes

Boletín de aludes

Payette Avalanche Center
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Peligro de aludes

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

Lo esencial

The Avalanche danger will rise to Moderate today as the sun and sustained temperatures above freezing in the upper elevations increase the likelihood of wet-loose and deeper wet slab avalanches. Avoid steep solar aspects, especially those under direct sunlight. If you are sinking into the snow past your ankles, or are seeing point releases or roller balls forming from the snow surface getting hot, choose cooler aspects to play on.  Sunday evening the mountains will start to re-freeze again as a cold storm enters our area.

Problemas de aludes

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2

    The clouds may break today, but it just might not matter if they don't...as the sun warms up the already warm snow, we are going to see more wet loose avalanches form from the snow surface. Yesterday, we noticed some old activity, as well as some new activity from the warming trend and the hot Sun. We were also able to kick loose rollerballs on steep rollovers.

    If you see any wet loose activity on a steep slope, choose another route that is not getting hot, especially in the afternoon. 

    Lick Creek, East of McCall...NE aspect at about 8,000 feet Friday the snow surface was hot enough that it was just starting to get saturated around 1:30 PM

  • Wet Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2

    The temps have stayed in the 30's and 40's up at 7,600 feet at the Granite weather station for the last 48 hours. Wet slab avalanches are some of the hardest avalanches to predict. We need sustained warm temps, and water moving through the snowpack to lube up and or breakdown the bonds between layers deeper in the snowpack that were some of the problems we checked off our list this season.  We have both of those elements, and now we add the sun and some weight from wet-loose activity, and skiers or sledders, and now here we are. This just might be the right combination to see some wet slabs release under all of this heat and pressure. With the heat, our large cornices that are hanging off rocks are going to be likely triggers. Give them room over the next couple of days as they can break back farther than you would expect.

     

Avalanche Discussion

The next 48 hours will be hot without freezing again tonight. We will see overnight freezing begin again on Sunday night.  It might take a couple of days into next week before the colder temps can re-freeze the saturated upper snowpack. Small wet avalanches in steep, complex terrain can be serious and can be the trigger for deeper wet slab avalanches. 

Don't throw caution to the wind during LOW danger, stack the odds in your favor. A slope only needs to have an angle of 30 degrees to produce an avalanche...Check your aspect and slope angle regularly. Across the U. S. we have had 36 avalanche fatalities so far this year. It is always a good idea to travel on slopes steeper than 30 degrees one at a time. Make sure all of your partners are carrying first aid gear as well as an avalanche transceiver, probe, and shovel.

We will issue our last advisory for the season on Saturday, April 10th. We would like to thank everyone for their support and observations, and for staying safe during an especially dangerous winter!  

  OBSERVATIONS – Please keep sharing your observations and information on instabilities and incidents. Your observations are very important to our operations and help everyone who looks at them. We have been experiencing some bugs with our observation page. If you are having difficulty submitting your observations, please email your information and photos with as much information as you can to [email protected].   MOTORIZED CLOSURES – Motorized closures are in effect in a few areas on the Payette National Forest.  Areas around Brundage Mountain Resort, on Granite Mountain, on Jughandle Mountain, in the Lick Creek area, and a few other areas are closed to motorized travel. Not all of these closures are signed, or signs may be easy to miss.  Please refer to the Winter Travel Map to find out where you can shred on your sled or moto. You can also download this map on your phone using the Avenza app.  Please respect other users and these closures where they exist.   SURVEYS – Our colleagues at the Wallowa Avalanche Center are seeking to gain a better understanding of how backcountry travelers use the avalanche forecast and have released this survey. Reach out to [email protected] with questions. Also, researchers from the University of Montana and the University of Nevada, Reno are looking into how the COVID-19 pandemic has affected backcountry skiing and snowboarding. That survey is available here.   DONATE – We rely on your support so please reach out to the Friends of the PAC, or click Donate above, to help us provide you with the info you need to be safe in the mountains.