Lawinenlagebericht

Northwest Coastal

Jan 17 – 18, 2015Avalanche Canada
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Archiviert · abgelaufen 12 years ago

Lawinengefahr

Mon
Tue
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
2 · Mässig
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Kernpunkte

Continued stormy conditions will create changing avalanche problems. Keep your wits about you and be prepared to adjust your plans as you travel.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–4
    Continuing snow and strong winds will build deep wind slabs. These are generally found lee to the SW, but keep an eye for local wind effects that may have left wind slabs on other aspects.

  • Storm Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–3
    Watch for storm slabs as snow continues to build up. Low elevation areas have been previously rain-soaked and loose wet avalanches remain possible in steep terrain.

Confidence

Fair - Intensity of incoming weather systems is uncertain

Weather Forecast

Expect 5-15 cm snow on Sunday with moderate to strong SW winds and the freezing level near 900 m. Light to moderate snow continues on Monday, with strong SW winds. A second organised system is forecast to affect the area on Tuesday, bringing heavy snow, strong SW winds and rising temperatures.

Avalanche Summary

Explosives triggered numerous size 1-2 slabs yesterday in the north of the region. Most of these were on wind-loaded N-NE aspects around 1400-1500 m. At low elevations, natural loose wet avalanches were observed in steep terrain.

Snowpack Summary

Strong winds have redistributed recent storm snow into wind slabs, and rain has saturated the surface of the snowpack to at least treeline elevations. As temperatures cool, the below treeline snowpack may gain some strength. Above treeline, a buried rain crust and/or surface hoar layer is down about 30-50 cm. A deeper crust/facet layer (buried mid-December) seems to have dropped off most operators' radar for the time being. The November crust near the bottom of the snowpack is generally well bonded, but may still be reactive in areas with a shallow snowpack, or with a very heavy load.

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