Lawinenlagebericht

Banff Yoho Kootenay

Mar 6 – 7, 2018Parks Canada
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Archiviert · abgelaufen 9 years ago

Lawinengefahr

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

Good skiing and travel conditions continue, though the sun is beginning to pack a punch on S aspects. With the winds moving the recent storm around up high we have left the alpine rating at Moderate for another day. 

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–1.5
    Increasing alpine West winds are forming wind slabs in lee areas near ridge crests. In steep unsupported terrain skier triggering is possible. 

  • Loose Dry

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–1.5
    This problem is more pronounced in the Southern parts of the forecast region that received more storm snow. It will be particularly prevalent in steep confined gullies, and/or where the old snow below the storm snow is weak and facetted.

Weather Forecast

Tuesday should see treeline temperatures rising from -15 to -5'C during the day. Alpine winds are expected to be in the light to moderate range out of the West. Some cloud cover and light flurries are forecasted with occasional sunny breaks.

Snowpack Summary

Variable amounts of low density storm snow (10-25 cm) now sit on top of a supportive mid-pack. The higher amounts of storm snow are in the southern region. Light wind effect in the alpine. Sun crust forming on some steep solar aspects. The deeper facet layers down 80-150 cm remain weak but are presently difficult to propagate.

Avalanche Summary

Sluffing and thin storm slabs up to size 1.5 were observed in steep alpine terrain today, including some solar triggered sluffs out of rocky areas. One small skier triggered wind slab was reported on a cross loaded feature in the Lipalian Chutes outside the Lake Louise ski area. One size 2 natural avalanche was observed, possibly cornice triggered.

Confidence

Due to the number and quality of field observations

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