Bollettino valanghe

Banff Yoho Kootenay

Dec 9 – 10, 2012Parks Canada
Vedi sulla mappa
Archiviato · scaduto 14 years ago

Pericolo valanghe

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

In sintesi

Winds Monday with a warm storm may bump the danger rating.  JBW

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2
    Soft to hard wind slabs can be found on lee and cross loaded slopes at and above treeline. Triggering is still possible on the right slope.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–3
    Isolated deep slabs have been noted every few days over the last month. Some of these have been explosive triggered and some natural, all failing near the ground on Nov 6 rain crust or glacial ice. There is still a concern for human triggering.

Weather Forecast

A warm Pacific push will bring cloudy skies and some precipitation for Sunday. On Monday the cold arctic air will move over the region and temperatures will drop. Winds are forecasted to increase to strong from the west on Sunday.

Snowpack Summary

Generally a well settled snowpack with some resistant planar shears related to the recent storm snow in the upper 40 cm. The Nov. Rain crust is approximately 30- 40 cm off the ground and is showing variable results. Good coverage and strength for early December.

Avalanche Summary

No new avalanches observed. On a flight today over the Wapta and Vermilion, several large size 2.5-3 full depth releases were observed that were approximately 3-4 days old. We suspect these failed on the Nov. crust.

Confidence

Wind speed and direction is uncertain on Monday

Regioni coperte