Bollettino valanghe

West Slopes North

Northwest Avalanche Center
Vedi sulla mappa

Pericolo valanghe

Mon
Alta quota
2 · Moderato
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
Open full map
Non aggiornato — questo bollettino è scaduto 4 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

At upper elevations, you may be able to find small pockets of newly formed wind slabs that could fail with a human trigger. Evaluate steep slopes before you head out on them, and if you travel into high-consequence steep terrain, which is where you may be able to trigger an avalanche, make sure to have a partner nearby and an escape route planned. When in doubt steer around steep, wind-loaded features, especially if you identify accompanying terrain traps on the slope.

Problemi valanghivi

  • Wind Slabs

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

    On Saturday, backcountry travelers in above treeline terrain saw newly formed wind slabs, but there were no reports of avalanches produced in steep terrain, and no cracking was observed. Later, other observers noted watching wind transport at higher elevations, along ridgelines. Slightly increased winds will progress through the night, backing off during the day. There is a small chance that newly formed wind slabs could be more reactive than Saturday's, as plenty of low-density snow still exists to be blown around. Be sure to check for and test wind slabs on steep slopes before fully committing to the slope.  High-consequence terrain is the place where you'd be mostly likely to find one of these rogue avalanches, so always be prepared with a bailing strategy if you were to trigger an avalanche on the slope. 

    A photo from last year of a small, isolated skier triggered avalanche in the Baker backcountry (White Salmon Glacier): The avalanche was triggered as a skier traversed across the bottom of the slope (note the ski track entering the debris). He was partially buried. Crown was ~5 inches deep and ~35 feet in width.  

    Photo: Zach Bunch

Avalanche Discussion

Low-density snow still exists despite the wind we've seen in the last couple days. Your biggest problem you might encounter is triggering dry loose avalanches as you enter steep, shady slopes. Steep south-facing terrain has a crust on the surface from intense sun on Friday and Saturday. It'll be pretty chilly on Sunday despite the sun, so south-facing terrain may just soften a little.  Snow surfaces vary from firm and wind-affected, to sun crusts, to powder. 

 

Regioni coperte