Bollettino valanghe

Lizard-Flathead

Mar 5, 2019Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 8 years ago

Pericolo valanghe

Wed
Thu
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
Apri la mappa completa

In sintesi

Persistent slab avalanches continue to pose a low likelihood, high consequence problem at lower elevations.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–1.5
    Wind slabs could be reactive to human triggering at upper elevations.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1.5–2.5
    Buried surface hoar layers have been a problem at lower elevations over the past month. Although the likelihood of triggering these layers has decreased, this problem still warrants conservative travel in steep open terrain.

Confidence

Moderate - Due to the number of field observations

Weather Forecast

MONDAY NIGHT: Clear, light northeast wind, alpine temperatures drop to -15 C.TUESDAY: Sunny, light southeast wind, alpine high temperatures near -8 C.WEDNESDAY: Cloudy with isolated flurries, trace accumulations, light southeast wind with moderate gusts, alpine high temperatures near -10 C.THURSDAY: Scattered flurries with 5-12 cm of snow, 30-50 km/h southwest wind, alpine high temperatures near -4 C.

Avalanche Summary

On Monday, one small (size 1) skier triggered slab avalanche was reported on an east aspect at 1850 m. A few small (size 1) wind slab avalanches and loose dry sluffs were reported over the weekend.

Snowpack Summary

Sheltered areas have 20-40 cm of low density snow on the surface while exposed terrain has been wind affected. Sun crusts can be found on the surface on south-facing slopes. There are potentially three layers of surface hoar in the upper snowpack. One is down 30-50 cm, another is down 40-80 cm, and the last one is down 80-120 cm. These layers have been most prominent and reactive between 1600 and 1900 m over the past month. The lower portion of the snowpack is generally strong.

Regioni coperte