Bollettino valanghe

Mt Hood

Northwest Avalanche Center
Vedi sulla mappa

Pericolo valanghe

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

In sintesi

Ongoing precipitation, wind-loading, and warming temperatures will maintain dangerous avalanche conditions Monday. Steer around slopes 35 degrees and steeper where you find fresh wind drifts, especially at upper elevations. A mix of rain and snow will increase concern for wet avalanches below treeline.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1.5–2.5

    Around 1ft of new snow fell over the past 24 hours, and another 3-7in are expected by Monday afternoon along with continued gusty SW winds. Observers Sunday found shallow but touchy slabs breaking within new snow. These slabs will thicken with additional loading as the stormy weather continues. Slabs may even become more reactive as snow levels climb Monday and create up-side-down layering with heavy snow atop lighter snow. Even in non-wind loaded areas, you could easily trigger slab avalanches on steep slopes. Give the snowpack time to adjust. Seek out simple, supported terrain and minimize exposure to overhead hazard. 

    (3/13/2022)

    Shooting crack in wind-drifted snow on an east aspect in Sand Canyon near 6200ft. 

    Photo: Andrew Kiefer

  • Loose Wet

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

    Rising snow levels Monday will bring mixed precipitation and light rain up to 5500ft. Small human-triggered loose wet avalanches were already reported Sunday at lower elevations, and will likely continue to be easy to trigger where you find soggy new snow. Look for rollerballs and pinwheels as warning signs the snow surface is wet and weak. Loose wet avalanches may start small but could run far and entrain significant snow. Don't underestimate these avalanches. They could knock you off your feet, carry you into trees, rocks, and creeks or bury you deeply in confined terrain. 

    (3/13/2022)

    A ski cut produced this small loose wet avalanche below treeline Sunday.

    Photo: Ron Martin

Avalanche Discussion

Saturday brought blizzard conditions, and the avalanche danger rose throughout the day as new snow accumulated. Snowfall rates of over 1in an hour occurred in the morning, and wind gusts easily reached 60mph at upper elevations with widespread wind-loading.  Fresh slabs of new and wind-drifted snow 6-12in deep were touchy to triggers and several small avalanches were reported near and below treeline.  Both wet and dry sluffs also occurred in sheltered areas and at lower elevations. Observations above treeline were limited, but there was a good recipe for natural avalanches. The ongoing storm will bring fluctuations in precipitation intensity and temperatures. Expect light snowfall through Monday afternoon with gradual warming, followed by cooling temperatures Monday night and the heaviest precipitation yet as a weak atmospheric river impacts the region.

Regioni coperte