Lawinenlagebericht

South Rockies

Feb 19, 2019Avalanche Canada
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Archiviert · abgelaufen 8 years ago

Lawinengefahr

Wed
Thu
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
2 · Mässig
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Kernpunkte

Recent snowfall may continue to be reactive to riders. Use added caution at higher elevations where the wind has formed touchy deposits. Also use caution in any opening below treeline, where a buried weak layer may be touchy.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–2
    Around 20 to 30 cm of recent snow may be touchy. Use added caution in lee terrain features near ridges, as winds have formed deeper deposits. The wind was first from the west and more recently from the northeast, so all lee features are suspect.

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1.5–2.5
    A weak layer of surface hoar is buried around 50 to 80 cm, which is best preserved in shaded and sheltered areas between 1600 m and 1900 m.

Confidence

High -

Weather Forecast

MONDAY NIGHT: Clear skies, light to moderate northwest wind, alpine temperature -15 C.TUESDAY: Increasing cloud with afternoon light snowfall, trace accumulation, moderate northwest wind, alpine temperature -13 C.WEDNESDAY: Cloudy with light snowfall, accumulation 5 cm, light to moderate northeast wind, alpine temperature -13 C.THURSDAY: Mostly cloudy with isolated snowfall, accumulation 1 to 5 cm, light to moderate northwest wind, alpine temperature -18 C.

Avalanche Summary

There was evidence of many small to large (size 1 to 2) wind slab avalanches in the region on Sunday and Monday. There was also evidence of 40 cm slabs scrubbing to ground in very shallow snowpack areas.

Snowpack Summary

Around 20 to 30 cm of snow fell within the past three days, with the highest amounts in the south of the region. The snow likely has slab properties where it fell with wind at higher elevations and could be loose in sheltered areas.The mid-January layer of surface hoar is buried around 50 to 80 cm. The surface hoar is found on shaded and sheltered slopes and is most prominent between 1600 m and 1900 m but has been found up to 2200 m. Snowpack test results suggest that this layer could be triggered by humans.The middle of the snowpack is generally consolidated. The bottom half of the snowpack is unconsolidated and composed of weak and sugary faceted grains. There is potential for shallower avalanches to step down to these deeper weak layers.

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