Lawinenlagebericht

Jasper

Apr 19 – 20, 2021
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Archiviert · abgelaufen 5 years ago

Lawinengefahr

Wed
Thu
Hochgebirge
Keine Stufe
Waldgrenze
Keine Stufe
Unterhalb
Keine Stufe

Kernpunkte

Expecting a slow progressive warm-up though this week. Solid overnight freezes expected to help the snowpack maintain structure longer though the morning. Massive cornices looming over the forecast region, give them lots of room!

Lawinenprobleme

  • Cornices

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1.5–3.5

    Cornices are awake! These features are extremely large, dense and heavy and will likely trigger the deeper instability on the slope below. If you must travel near or below cornices, use good travel techniques and group management to reduce exposure.

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–3

    Shallow snowpack areas and solar aspects have increased potential for human triggered and natural avalanches stepping to deeper layers.

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–2

    Cool over nights will temper the loose wet problem in the short term. Avoid steep, treed TL and BTL terrain in the heat of day; even cutting out a small wet slide can push you into terrain traps or pin you. Don't ride below your partner.   

Weather Forecast

Clearing skies across the Rockies with freezing levels lowering to valley bottoms overnight. Winds forecasted to be light. Daytime freezing levels rising to 2500m.

Visit Avalanche Canada's Mountain Weather Forecast for a complete long range forecast.

Snowpack Summary

Cold nights, helping the snowpack recovery and creating a supportive melt/freeze crust on all aspects and elevations. This crust will break down over the day, except above ~2500m where the snow is likely to remained dry for the near future. Some isolated pockets of windslab possible at ridge top, with small inputs of precipitation and transport.

Avalanche Summary

A slower warming tread forecast through this week should allow for the snowpack to adjust. Sunny, exposed TL and BTL terrain rapidly losing coverage and the overall snowpack structure is weak and will collapse with very little load. 

Confidence

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