Lawinenlagebericht

Jasper

Mar 15 – 16, 2017Parks Canada
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Archiviert · abgelaufen 10 years ago

Lawinengefahr

Fri
Sat
Hochgebirge
4 · Gross
Waldgrenze
4 · Gross
Unterhalb
4 · Gross
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Kernpunkte

Highway 93 is closed between Saskatchewan River Crossing and Athabasca Falls until avalanche control can take place.

Lawinenprobleme

  • Storm Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Very Likely
    Größe
    2–3
    Up to 20cm has fallen in the past 24hrs and is bonding poorly to last weeks snow. Soft slabs up to size 2 have been running to the valley bottom and in some cases are believed to trigger deeper releases.

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Very Likely
    Größe
    1–2
    With cooling temperatures the activity from this layer will decrease at treeline as the day progresses.

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Very Likely
    Größe
    2–4
    With additional snow loading, rain  and warm temperatures this problem has become reactive producing full path releases 

Weather Forecast

Freezing levels will drop overnight and during Thursday to the valley bottom. Another 10-15cm of snow is possible overnight with light winds. Thursday gusting strong SW winds at treeline and temperatures of  -5.  Snow flurries will taper off in the PM

Snowpack Summary

20cm of new snow has arrived in the past 24 hours. This soft storm slab is bonding poorly to the old snow surface. The mid-pack consists of persistent slab layers intermixed with weak facets. The base is weak facets, depth hoar, and an ice crust from November. Below 2,100m the snowpack is moist and below 1,700m it is wet.

Avalanche Summary

A widespread avalanche cycle is underway on all aspects and elevations. Wet slabs and point releases are occurring below 1,800m. At higher elevations dry storm slab avalanche are running far into the valley bottom. Several class 2 avalanche were observed and larger events are also expected with deep releases.

Confidence

Freezing levels are uncertain

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