Lawinenlagebericht

South Rockies

Jan 22 – 23, 2012Avalanche Canada
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Archiviert · abgelaufen 15 years ago

Lawinengefahr

Tue
Wed
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
2 · Mässig
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Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–4
    Watch for wind slabs on lee features at treeline and in the alpine. Expect continued wind slab development with forecast weather.

  • Storm Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–5
    A classic recipe for storm slabs has evolved: moderate snowfall with rising temperatures landing on loose dry snow. Watch for storm snow avalanches, especially in steep or convex terrain.

Confidence

Fair - Due to limited field observations

Weather Forecast

Monday: 5cm of snow / strong southwest winds / freezing level at surfaceTuesday: light flurries in the am becoming moderate snowfall tuesday evening / strong southwest winds / freezing level rising to 1500m by eveningWednesday: continued snowfall through early morning decreasing by mid-day / winds becoming moderate and westerly / continued warm temperatures

Avalanche Summary

A few size 2 naturals were reported from the region over the past 24hrs. We'd love to hear what you're seeing out there. Any observations can be sent to [email protected].

Snowpack Summary

Over the week 40-60cm of snow formed soft slabs over a crust/facet/surface hoar combo. Snowfall, wind and warming on late Friday/Saturday have created a more reactive storm slab problem as dense snow now over-rides colder, lighter snow where weaknesses are more likely to endure. Deeper in the snowpack, a surface hoar layer buried in early December remains a concern, as avalanches triggered on this layer would be destructive. However, information is limited about its current reactivity. From preliminary observations, the rapid storm snow load over the past week did not cause any releases on this layer. Basal facets also exist in many parts of the region.Facets sandwiched between two firm layers in the top metre of the snowpack are being monitored in the south-east.

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