Lawinenlagebericht

Kootenay Boundary

Dec 17 – 18, 2014Avalanche Canada
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Lawinengefahr

Fri
Sat
Hochgebirge
2 · Mässig
Waldgrenze
1 · Gering
Unterhalb
1 · Gering
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Kernpunkte

If the riding is good, the snowpack stability might not be.

Lawinenprobleme

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely
    Größe
    2–4
    Old facet/crust weaknesses may still be sensitive to triggers on slopes that aren't bridged by a thick near-surface crust. Generally shady aspects in the high alpine.

  • Loose Dry

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–2
    Dry surface snow is poorly bonded to the underlying hard crust and may sluff off in steep terrain.

Confidence

Fair - Due to the number of field observations

Weather Forecast

Mainly cloudy with around 5 cm of fresh snow on Thursday, 10 cm on Friday and another couple expected on Saturday. Freezing levels are expected to gradually rise from valley bottom on Thursday to 1600 m or higher by Saturday afternoon. Winds should remain light but gusty from the south.

Avalanche Summary

There we no new reports of avalanches on Tuesday and Wednesday morning.

Snowpack Summary

Light flurries are burying large surface hoar sitting on or near a thick hard supportive rain crust that extends as high as 2100 m. Critical slopes are high elevation north aspects where facets or buried surface hoar from earlier in the month may be lurking under dense storm slabs, and older facet/crust weaknesses may be persisting. Recent snowpack tests at 2050 m in a NW aspect in Kootenay Pass produced moderate sudden results down 35 cm under the late-November crust and down 79 cm on facets above the early-November crust. Meanwhile in the Southern Purcells, snowpack tests last weekend gave easy sudden planer results on well preserved surface hoar where it was found down 30 cm on high north aspects.

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