Lawinenlagebericht

Jasper

Mar 27 – 28, 2017Parks Canada
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Archiviert · abgelaufen 10 years ago

Lawinengefahr

Wed
Thu
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
1 · Gering
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Kernpunkte

A Haiku:Deep Persistent Slab.Not very likely to heal.Constantly watchful(so poetry isn't my strength. But, I think you get the idea;)

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–3
    Building windslab at tree line and above on lee aspects. It's a continuous problem that requires constant attention in order to ensure your safety and/or riding quality. 

  • Cornices

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–3
    Large cornices on ridge top lee features. Their sheer mass is a problem. Recent cornice failures have been generally small (a few tons or so;) but are consistently triggering large deep persistent slab avalanches in alpine terrain.

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    2–4
    The deep persistent slab can be triggered by travelers from shallow or weak locations or naturally from large loads such as cornice failure or windslab avalanches. On Mar 25, skiers triggered a sz 2.5 in a consistently shallow area at tree line.

Weather Forecast

Mainly cloudy Tuesday with some isolated flurries and little accumulation. Blustery SW winds at ridge top forecasted to hold steady moderate values with strong to extreme gusts (70 km/h). Alpine temperatures forecasted for a high of -5 °C.

Snowpack Summary

Creamy, pressed and settled surface snow with some wind effect in the open. A spattering of previously buried, near surface wind slabs. Two questionable interfaces dwn between 60 and 100cms though the mid-pack. All this, making up the deep persistent slab; spawning from the whole season snowpack sitting on a  large, weak facet layer off the ground.

Avalanche Summary

New wind load is triggering deep slabs and cornice triggered slabs on North through West aspects, up to size 3.

Confidence

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