Lawinenlagebericht

Jasper

Apr 28 – 29, 2014Parks Canada
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Lawinengefahr

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

The avalanche danger is Low as long as the melt freeze crust remains intact.  The danger will rise rapidly as the crust deteriorates with sun exposure and daytime heating.  Freezing levels are to rise dramatically Wednesday and Thursday.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–2
    Slabs that rest on the April 22 crust have not been reactive lately. It is still possible to trigger these slabs on steep terrain below ridgelines or convex features.

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–3
    Travel early before the heat of the day, and avoid big slopes in the afternoon.

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    2–3
    Cornice failures or triggering from thin spots have the potential to initiate deep avalanches. Depending on aspect, these could be a wet or dry slab characteristic.

Weather Forecast

Freeze-thaw conditions continue. Tuesday will be mainly sunny and slightly warmer temperatures as a result. Wednesday and Thursday will be sun and freezing levels rising to 3500m.

Snowpack Summary

There is rain crust from the valley bottom to 2,350m and a sun crust into Alpine on solar aspects. Settled wind slabs are on NE aspects from 2,000 m to the alpine. Moist and wet snow exists below the crust extending into the alpine on solar aspects. The mid-pack is solid on North aspects. Large and ominous cornices.

Avalanche Summary

Several loose wet size 2 noted on Mt sask at 2100-2500m stopping before the river. One size 2 loose wet off boundary peak. Cornice failure peak across sunwapta station E aspect initiated nothing. Dated report sometime before Saturday from Cirrus creek size 3 slab.

Confidence

The weather pattern is stable on Tuesday

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