Lawinenlagebericht

Northwest Coastal

Mar 26 – 27, 2012Avalanche Canada
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Archiviert · abgelaufen 15 years ago

Lawinengefahr

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

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–4
    Variable wind slabs found in the alpine and at treeline. These exist on lee aspects, and terrain features. Cracking and/or whumphing felt below you is a good indicator of unstable, wind effected snow.

  • Cornices

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–6
    Cornices are reported to be very large and potentially unstable at this time. A cornice fall could be destructive by itself, and may also act as a trigger on the slope below.

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–3
    Loose wet avalanches are likely on steep sun exposed slopes when the sun is shining.

Confidence

Fair - Intensity of incoming weather is uncertain

Weather Forecast

A series of systems will be crossing the Southern part of the province through the forecast period. Most of the punch will be in the South, leaving the North West with light- moderate precipitation amounts, a dominating SW flow, and above normal temperatures. Tuesday: Snow amounts 2-5 cm. Ridgetop winds moderate from the SE. Freezing levels 1100-1300 m. Wednesday/ Thursday: Moderate snow amounts in the West, lighter accumulations inland. Ridgetop winds strong from the South. Freezing levels near 1000 m, falling to valley bottom Wednesday overnight.

Avalanche Summary

No recent avalanche activity has been reported. On Sunday natural cornice failures triggered slab avalanches up to size 2.5 on the slopes below. Forecast snow may have a poor bond to underlying crusts, pay attention to the weather conditions in your local mountains, and make observations while you travel.

Snowpack Summary

Moderate to strong southeast winds have created wind slabs on opposite slopes, and terrain features in the alpine, and treeline. Crusts have formed on solar aspects at all elevations. They become moist under sunny skies during the day with a good crust recovery at night. Melt-freeze conditions exist below treeline. Forecast snow may have a poor bond to these crusts. Below this down 60-120 cm exists a surface hoar or facets interface. There has been no recent activity on these layers but they could wake up with heavy triggers like a large cornice fall, or under the weight of a sled and it's rider. Cornices in the region are reported to be very large and potentially unstable.

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