Lawinenlagebericht

Banff Yoho Kootenay

Dec 9 – 10, 2012Parks Canada
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Lawinengefahr

Sun
Mon
Hochgebirge
2 · Mässig
Waldgrenze
2 · Mässig
Unterhalb
1 · Gering
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Kernpunkte

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

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    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

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    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

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