Bollettino valanghe

Lizard-Flathead

Dec 23, 2017Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 9 years ago

Pericolo valanghe

Sun
Mon
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato
Apri la mappa completa

In sintesi

Deep powder offers excellent riding in many areas, but there's a highly variable weak layer that warrants cautious terrain choices. Read this forecasters' blog for more details.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–2
    Low density snow and sustained alpine winds are a recipe for touchy wind slabs in exposed terrain.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–3
    A variable weak layer buried approximately 60 cm below the surface will likely remain sensitive to human-triggered avalanches in areas with stiffer snow. Sheltered areas with steep, unsupported terrain are the most likely places to be caught.

Avalanche Summary

A natural avalanche cycle was observed in alpine terrain on Friday with storm slabs up to size 2 (typically 20-40 cm deep). Explosive avalanche control triggered similar sized avalanches.

Confidence

Moderate - Wind effect is extremely variable

Weather Forecast

SATURDAY: Dry and sunny, moderate northwest winds, temperatures around -15 C.SUNDAY: Sunny with increasing clouds, light northwest winds, temperatures around -15 C.MONDAY: Mix of sun and cloud, light northwest winds, temperatures around -18 C.

Snowpack Summary

Around 50 to 80 cm recent new snow now rests on a variety of old surfaces. These old surfaces include crusts on south through west facing slopes, wind-scoured slopes and, in sheltered terrain at and below treeline, large feathery surface hoar crystals. Lower in the snowpack, you should be able to find a hard crust that was buried near the end of November. This crust is approximately 30 cm thick and extends from 1600 m to mountain top on all aspects. Average snowpack depths at treeline in the region range from 100 to 140 cm.

Regioni coperte