Bulletin d’avalanche

Blues

Wallowa Avalanche Center
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Danger d’avalanche

Mon
Alpin
3 · Marqué
Limite forestière
4 · Fort
Sous la limite
3 · Marqué
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Périmé — ce bulletin a expiré 2 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Heavy rains and warming will likely trigger many natural avalanches today throughout the mountains on slopes greater than 30 degrees.  If there is a rapid change event to trigger a deadly 2-4' thick slab involving our January weak snow, this is it.  This is a good day for indoor activities, but if you do travel outside, do not stop yourself or your vehicle under steep roadcuts or snowy roofs.  We recommend avoiding avalanche terrain.  

This forecast is sponsored by M. CROW – M. Crow

Problèmes avalancheux

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Very Likely
    Taille
    1–2.5

    Rain on snow will cause widespread avalanching.  Expect to see this on roadcuts and some lower elevation terrain that may not slide often.

    Wet loose avalanches typically start in terrain steeper than 35 degrees, and while they travel slowly, they are very dense/destructive and can travel long distances into the flats.   

    With this volume of rain, Wet Slab avalanches are possible if liquid water percolates down to a crust or bed surface.  

    (3/2/2022)

    In the Shooting Gallery on north aspect at 5400'

    Photo: Killian

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3

    A rapid input of 1-2" of rain will increase the likelihood of a very large and deadly persistent slab awakening on slopes greater than 30 degrees.  This weak layer has been slowly gaining strength, but an additional load on the slab above it will test it.  If it's going to slide, it would be today.  

    This picture was submitted Thursday of a reported natural avalanche that was taken along the Anthony Lakes Highway at about 5600'.  It was reported to have failed on January Facets with minor loading/input.  

    (2/20/2025)

    This natural avalanche was reported along the Anthony Lakes Highway at an elevation below 6,000.  It was reported to have failed on the January facets.  Photo: Logan Kerns

Avalanche Discussion

Another 1-2" of rain will fall in the Blues today, creating dangerous avalanche conditions on all terrain greater than 30 degrees.  

If you do brave the sogginess, avoid avalanche terrain with a wide margin on runout zones and near terrain traps.

It's been great to see all of the recent observations.  Thanks to a member of the public who submitted a roadside natural slab on the Anthony Lakes highway last week.   Road or spotting scope photos are excellent.  Add value to your forecast.  Submit an observation here.  

 

Régions couvertes