Lawinenlagebericht

Northwest Coastal

Apr 18 – 19, 2016Avalanche Canada
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Archiviert · abgelaufen 10 years ago

Lawinengefahr

Wed
Thu
Hochgebirge
Keine Stufe
Waldgrenze
Keine Stufe
Unterhalb
Keine Stufe
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Kernpunkte

Spring Conditions. The storm is over, however wind slabs left behind may be easy to trigger at higher elevations. Watch for a rapid change to sunny and hot conditions. Areas with new snow may release naturally when the sun comes out.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely - Very Likely
    Größe
    1–4
    New wind slabs are expected to have formed during the recent storm at high alpine elevations where it was cold enough for snow. Forecast sun and high freezing levels may result in natural avalanches.

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–3
    Forecast strong solar radiation, warm temperatures and high freezing levels may continue to result in loose wet avalanches. Monitor crust thickness and strength throughout the day.

  • Wet Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    2–5
    Wet slab avalanches have been triggered by recent rain events. Forecast sun and high freezing levels may continue to trigger weak wet snowpacks if there is no re-freeze overnight.

Weather Forecast

Clearing overnight with light northeast winds replacing the strong southwest winds during the storm. Freezing levels down to 500 metres overnight and then rising up to 2500 metres on Tuesday under clear skies and strong solar radiation. Clear and sunny on Wednesday with freezing level at 2500 metres. Clear and sunny on Thursday, some chance that the ridge of high pressure will break down during the day resulting in high cloud.

Avalanche Summary

Wet slab avalanches releasing down to the ground have been reported along the highway corridor near Stewart from mid-elevation paths. Wind slabs and cornice falls are suspected in the high alpine, but visibility has been poor and we have no new reports from alpine elevations.

Snowpack Summary

There has been 20-40 mm of precipitation in the past few days. Most of this has fallen as rain up to at least 1500 metres. Most of the precipitation has been in the near coastal ranges, with Stewart and Kitimat receiving closer to 40mm and areas around Terrace closer to 20mm. Winds have been strong out of the south; reports from Stewart of gusts above 100 km/hr on Monday that have developed wind slabs in the high alpine. Rain has soaked the snowpack at lower elevations. Some recent crusts within the upper snowpack may continue to provide a sliding layer for loose wet avalanches when forecast temperatures and freezing levels spike in the next few days.

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