Lawinenlagebericht

South Rockies

Feb 19 – 20, 2013Avalanche Canada
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Archiviert · abgelaufen 14 years ago

Lawinengefahr

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

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–4
    Relatively light but locally gusty winds have created wind slabs near ridge lines in exposed areas. If the wind picks up, expect this problem to become more widespread.

  • Loose Dry

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–2
    Loose snow avalanches running surprisingly far have been observed in the recent new snow, particularly in southeast parts of the region.

Confidence

Fair - Due to variable snowpack conditions

Weather Forecast

Synopsis: Relatively benign weather is anticipated until Friday afternoon, when a frontal system is expected to bring light precipitation.Wednesday: Flurries possible in the morning, clearing in the afternoon. Light southwesterly winds. Freezing level near valley bottom.Thursday: dry and clear, becoming more cloudy in the afternoon. Light westerly winds. Freezing level near valley bottom.Friday: Light snowfall starting late in the day. Light westerly winds, picking up in the afternoon. Freezing level near valley bottom.

Avalanche Summary

Small loose snow avalanches have been reported in the recent new snow.

Snowpack Summary

Southeastern parts of the region saw 30-40cm new snow in the last storm, while western areas saw just a trace. This new snow overlies old wind slabs on higher north and east facing terrain and sun crusts on solar aspects. Wind slabs are extensive in exposed areas and cornices are reported to be well developed. A surface hoar/facet/sun crust layer from mid February (12th) may be buried in the top 20 cm or so, where it hasn't been blown away by the wind and is likely making some of the wind slabs more touchy. Mid and lower snowpack layers are generally well settled and stable.

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