Bollettino valanghe

Silver Valley & Bitterroot Mountains

Idaho Panhandle Avalanche Center
Vedi sulla mappa

Pericolo valanghe

Wed
Alta quota
1 · Debole
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

Recently formed and generally small wind slabs remain possible to human trigger above treeline. Watch for these isolated pockets of unstable snow near wind exposed ridges on the eastern half of the compass rose. You can easily avoid such pillowy-looking drifts and find otherwise mostly stable conditions at higher elevations. Wet loose sluffs may become possible for you to initiate in steep terrain at lower elevations and higher sun-warmed slopes. Look for roller balls and trees shedding snow as indications of warming affecting the surface snow and increasing the possibility of wet loose avalanches. Keep these avalanche problems in mind, maintain safe travel practices like moving one at a time from safe zone to safe zone, and remember that “Low” does not mean “no” avalanche danger.

Problemi valanghivi

  • Wind Slabs

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

    South and west wind transported the few inches of snow from late last week, resulting in relatively small pockets of wind slab reactive to a human trigger. These pillowy looking drifts of snow should feel more dense than other surface snow. Isolated to our most wind affected ridges, most terrain lacks this avalanche problem today. Small avalanches can result in big consequences, especially in the terrain above treeline where you can find these wind slabs.

    (3/21/2022)

    Shooting cracks in shallow wind slab, indicating that our weight could trigger an avalanche in these generally small pockets of wind slab. 6,400', E aspect, near Lower Glidden Lake.

    Photo: Ryan Matz

  • Loose Wet

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

    Warming from above freezing temperatures and especially sun exposure makes wet loose avalanches possible. Most likely at the warmest time of day, these heavy, wet sluffs could easily knock you off your feet in steep terrain. You can manage this avalanche problem by staying off steep terrain during the warmest time of day.

Avalanche Discussion

Current snow surface conditions vary from a little soft snow up high to refrozen crust at low elevations which may soften with warming. You’ll also find some wind scouring and deposition which built the current wind slab problem on upper elevation ridgelines. Our primary avalanche concerns are isolated to this surface snow which does hold some sun crust on sun exposed aspects. Deeper instabilities, particularly the recent persistent weak layer above the early March crust, continue to show increasing strength. That said, digging the two feet or less to this prominent crust, looking for weak layers, might still be worth your time.

Northerly aspects above about 5,000’ offer excellent shallow powder conditions, especially on low angle, sub-avalanche terrain. Remember to manage our avoidable avalanche problems and enjoy some dry, soft snow before the warming increases later this week!

Regioni coperte