Lawinenlagebericht

Purcells

Mar 7 – 8, 2016Avalanche Canada
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Archiviert · abgelaufen 11 years ago

Lawinengefahr

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

If you have been out in the mountains, please consider reporting your observations to the Mountain Information Network (MIN).

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–3
    Wind slabs continue to develop at higher elevations where there is snow available for transport. Watch for cross loaded slopes.

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    2–5
    A weak layer of surface that was buried on February 27th may be down 20-40 cm. This weak layer may be associated with a crust on solar aspects. The February 11th surface hoar layer is now down 50-60 cm and continues to be a concern.

Avalanche Summary

A few small natural avalanches and a couple of size 2.0 explosives controlled avalanches were reported on Sunday. Natural wind slabs and storm slabs up to size 2.5 were reported on Saturday. Natural and explosives controlled avalanches up to size 2.5 were reported on Friday.

Confidence

High

Weather Forecast

Freezing level dropping to valley bottoms overnight. 2-3 cm of new snow combined with light winds overnight. Overcast with light precipitation on Tuesday combined with light winds and freezing levels rising up to 1500 metres. Chance of broken or scattered cloud on Wednesday with a good overnight freeze. The next pulse of stormy weather moving into the region on Wednesday night. Warm, wet, and windy on Thursday.

Snowpack Summary

Strong southerly winds have developed wind slabs in the alpine and at treeline. The 20-40 cm of recent storm snow is bonding poorly to a melt-freeze crust on previously sun-exposed slopes and lower elevation terrain, and/or a layer of surface hoar on shady and sheltered slopes at treeline elevations. The surface hoar and/or crust layer buried in mid-February is now down 50-80cm. The early January surface hoar/facet layer is typically down 70-120cm. Triggering an avalanche on this layer has become unlikely but it still has isolated potential to produce very large avalanches with a heavy trigger. In general, the lower snowpack is well settled and strong, apart from some thin snowpack areas where basal facets exist.

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