Bollettino valanghe

Bollettino valanghe

Payette Avalanche Center
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Pericolo valanghe

Sun
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
Non aggiornato — questo bollettino è scaduto 5 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Thursday-Friday morning, 4-7 inches of light, new snow fell under gusty winds into the 20+ mph that are continuing to move snow this morning. Northern winds have affected upper elevation exposed slopes and have loaded leeward terrain. Your primary concern today is going to be wind slabs near ridgelines and on exposed terrain. Shallow sluffing or dry, loose avalanches will be likely if you are skiing or riding in steeper terrain. 

Small to medium size point natural point release avalanches are possible within the new 4-7 inches of snow on East, South, and West aspects as the Sun heats up the snow surface, especially steep, due South rocky slopes. If you are seeing rollerballs or point releases, move to a slope that's not under direct heat from the Sun.

Problemi valanghivi

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2

    The Sun will be out today along with a little bit warmer temperatures than yesterday.  Some slopes are going to see the Sun for the first time today since before Thursday's storm that put down 4-7 inches of snow in places, and maybe up to a foot or deeper upper elevation on leeward slopes. Northern winds loaded Southern aspects yesterday...Watch for loose snow on aspects getting heated up by direct sun today. If you are seeing rollerballs and point releases on the snow surface, move to another, cooler aspect. 

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–1.5

    Winds over the last 24 hours have been light and have done a lot of gusting into the 20 plus MPH range.  

    You can expect to find 1 to 14-inch wind slabs on leeward slopes in upper elevation and on exposed lower elevation terrain. 

    These wind slabs are resting on a variety of snow surfaces including crusts, weak layers, and firm scoured snow that have formed over the last 2 weeks and will make it easier to trigger an avalanche.  

    If you are seeing red flags like cracking of woomphing, turn around and choose a different, safer or lower angle route.

    Northern Winds gusting into the 20 MPH range moving snow Friday, January 21st near Secesch Summit.

Avalanche Discussion

This information is sponsored by OnX Backcountry. Thank you for supporting the Payette Avalanche Center!

Thursday's storm gave us 4-7 inches of snow in most places. Other places like terrain exposed to the wind had all the new snow stripped off of it and sent into leeward terrain. You will find variable conditions where the wind gusted into the 20MPH range. Shallow sun crusts about an inch deep on solar aspects are not bonding to the snow well at all below.

The slopes that have been protected from the wind and sun are going to have soft snow, and are also where you are going to find a layer of Near-Surface Facets and Surface Hoar below the new snow which could be more touchy in some areas than others.  Even though Our test pits have shown a nice, stable, right side up snowpack with good bonding of layers, there still could be areas where surface hoar layers are better preserved that may be more reactive under the new snow.

Friday, we observed a lot of terrain in the Secesh Summit area after the storm broke and did not see any debris or signs of instabilities.

Continue good, safe travel protocols like spreading out on slopes one at a time, keeping your eyes on your partners, and making sure you are all carrying a beacon that is on, a shovel, and a probe. Small avalanches can push you where you don't want to go especially in steeper or more committing terrain.

*** Check out our Observations Page to see what others are seeing...We are always looking for more Information from snowmobilers and skiers on snow and weather conditions. These observations help our forecasts and they help other users in and outside of the community.

It can be quick with or without a photo…Use the Observations link at the top of the page to submit your observations. If you experience any unfortunate technical issues please email us at [email protected]…Thanks 

***Motorized users, please be aware that there are some areas of the Payette National Forest that are closed to motorized use, some of these closures are to protect wildlife and some are to protect other recreators.  Check out the Winter Travel Map below for details

https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/fseprd891395.pdf