Lawinenlagebericht

Jasper

Apr 11 – 12, 2013Parks Canada
Auf der Karte ansehen
Archiviert · abgelaufen 13 years ago

Lawinengefahr

Sat
Sun
Hochgebirge
2 · Mässig
Waldgrenze
2 · Mässig
Unterhalb
1 · Gering
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Kernpunkte

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–3
    Recent winds have formed new windslabs on lee aspects below ridgecrests above treeline.  These slabs are roughly 10-15cm thick, and where they are sitting on previous crusts may be reactive to skier traffic.

  • Cornices

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    1–3
    Several cornice failures were observed in the past 48hours and some of these did trigger storm slabs on the slopes below up to size 2. 

  • Loose Dry

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–2
    Recent snowfall came in warm and stuck to steep rock and ice.  This terrain will shed this snow with daytime heating.

Confidence

Weather Forecast

Good overnight freeze for Thursday night, with freezing levels hovering around 1200m during the daytime for the next few days.  Winds light to moderate from the SW with convective precipitation expected through the weekend with up to 15mm of precipitation possible by Sunday evening.

Snowpack Summary

Melt freeze crust below 2000m on all aspects, new windslab (10cm thick) found on lee aspets at exposed ridgecrests above treeline.  10cm of new snow in past 24 hours, rapidly settling and moist below 2200m.  Sun crust on solar aspects.

Avalanche Summary

Several natural slab avalanches observed in past 24 hours in both the Columbia Icefield Area and Maligne Lake district.  Size 2 - 2.5, on lee aspects below ridgelines between 2200-2400m.  Several large cornice failures reported, and some of these did trigger storm slabs on the slopes below to size 2.  Loose dry point releases on steep N terrain.

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