Lawinenlagebericht

Kananaskis

Mar 6 – 7, 2013Alberta Parks
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Archiviert · abgelaufen 14 years ago

Lawinengefahr

Fri
Sat
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
2 · Mässig
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Kernpunkte

New snow forecast for the overnight period will add additional load onto last weekends storm snow.  Winds are expected to be light but stronger values will quickly form new soft slabs and compound the cornice concerns that exist now.

Lawinenprobleme

  • Cornices

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely - Very Likely
    Größe
    2–5
    Cornices have grown significantly in the past 3 days and several cornice failures occurred recently which triggered slab avalanches up to Size 3 on the slopes below.

  • Loose Dry

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely - Very Likely
    Größe
    1–3
    Recent snowfall and light/moderate winds has lead to sluffing from steep terrain on all aspects at all elevations.

  • Storm Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely - Very Likely
    Größe
    2–5
    Snow from the most recent storms which totalled as much as 50-70cm is settling out. Slab development is present in lee and cross-loaded terrain. The natural avalanche cycle has tapered off, but prime conditions exist for human triggering.

Confidence

Good

Weather Forecast

Forecasts are calling for 10-15cm of new snow overnight with models differing in when the snowfall periods will end - either Thursday Am or late in the day on Thursday.  Winds are forecast to remain light from the W-SW.  Temperatures are on a slow steady rise. 

Avalanche Summary

No new observations observed or reported today.

Snowpack Summary

The recent storm snow has settled out into a soft slab approx 30cm thick in areas near treeline.  Compression test results at 2400m on a 30 degree northeast aspect in the Tent Ridge area today showed moderate results at the interface between the storm snow and an old windslab.  Additional testing produced hard results on a deeper windslab down 60cm.  The shears were Sudden Planar in character.

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