Bollettino valanghe

Selkirk Mountains

Idaho Panhandle Avalanche Center
Vedi sulla mappa

Pericolo valanghe

Wed
Alta quota
4 · Forte
Limite del bosco
4 · Forte
Sotto il limite
3 · Marcato
Open full map
Non aggiornato — questo bollettino è scaduto 3 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Due to heavy overnight snowfall and strong winds, dangerous avalanche conditions are expected today. Natural avalanches are possible, and there is a high likelihood of human triggered avalanches on slopes over 32 degrees. Today it'll be best to avoid all steep slopes and lower-angle terrain beneath steep slopes. 

Problemi valanghivi

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    2–3

    Dangerous avalanche conditions exist today. With ongoing heavy snowfall, natural avalanches are anticipated throughout the day and human triggered avalanches are likely. Traveling in avalanche-prone areas is not recommended. Exercise caution in route selection, avoiding avalanche runout zones, roads, and trails beneath such terrain. The avalanche danger will increase throughout the day as strong winds and heavy snow continue. 

    The risk is elevated at higher elevations due to a deeper snowpack, while lower elevations, although with less snow, should also adhere to the same safety measures. Lower temperatures allowed this snow to blanket all elevations and aspects

Avalanche Discussion

Yesterday, we ventured into the Selkirks near Flattop Mtn, encountering approximately 2 feet of soft, fresh snow from the weekend's storm. This layer rests atop a more consolidated old snow base. While the interaction between these two layers isn't excessively reactive, it did exhibit signs of instability. Small facets are present between the slabs, contributing to the potential for avalanches. Considering the settling of the snow and the additional weight from last night and today, I foresee increased stress on the interface between the old and new snow, bringing it closer to a critical failure point. Natural avalanches are expected today, particularly at higher elevations on wind-loaded slopes. The snowpack is becoming more intricate, with multiple instabilities in the top third and several potential layers prone to avalanching.

If venturing into the backcountry today, meticulous route finding is crucial. Avoid slopes exceeding 32 degrees on all aspects, especially at higher elevations and near ridgelines. The wind has primarily been strong out of the southwest. Loading can be anticipated on S-SE-SW slopes. Resist the temptation to approach the base of steep slopes. It's advisable to steer clear of runout zones and areas where avalanche terrain looms above.

Heavy snowfall and strong Southwest winds are forecasted to persist today, escalating the avalanche danger progressively. Navigating may become challenging, compromising visibility and terrain assessment. Despite the soft snow encountered yesterday, today's ongoing snowfall will pose deep challenges for snowmobiling and skiing, potentially requiring extra caution and effort.

Take care and stay safe, Jeff

Regioni coperte