Lawinenlagebericht

Kootenay Boundary

Mar 31 – Apr 1, 2016Avalanche Canada
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Archiviert · abgelaufen 11 years ago

Lawinengefahr

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

A Special Public Avalanche Warning is in effect due to intense warming.

Lawinenprobleme

  • Cornices

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–5
    Large fragile cornices threaten many slopes and could trigger large avalanches on slopes below.

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    3–6
    Persistent slabs may wake up with the prolonged warming, or be triggered by cornice fall.

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–3
    Loose wet avalanches are likely on all steep slopes, especially those getting baked by the sun. Wet slabs are possible too.

Weather Forecast

Hot weather continues through the weekend, with the freezing level around 2800 m. A brief disturbance on Saturday may bring some cloud, increasing westerly winds, and localised convective showers.

Avalanche Summary

A natural cycle of size 1-2 loose wet and wet slab avalanches continued on Thursday. Similar activity is expected until temperatures cool.

Snowpack Summary

On shaded slopes above 2000 m you may still find cold winter snow (and unicorns), which is reported to be settled and faceted on sheltered slopes, and wind-affected in exposed areas. Warm temperatures have promoted a daily melt-freeze cycle on all other snow surfaces. Cornices are large and looming and have become increasingly weak with the sunny weather. In the upper snowpack you'll likely find a few hard crusts which exist everywhere except on high, north-facing terrain. The late February surface hoar/ crust interface (down 80 to 130 cm) remains a low probability/ high consequence concern. Test results are variable, with occasional sudden planar (pop) results. While generally becoming unlikely to trigger, this layer could produce surprisingly large and destructive avalanches with a cornice fall or warm temperatures.

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