Lawinenlagebericht

Waterton Lakes

Apr 17 – 20, 2016Parks Canada
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Lawinengefahr

Tue
Wed
Hochgebirge
Keine Stufe
Waldgrenze
Keine Stufe
Unterhalb
Keine Stufe
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Kernpunkte

Summer-like weather will dominate this week. With light winds and high temperatures, you'll be seeking out summery activities! Keep in mind that upper reaches of hiking trails are still snowbound, and travel through avalanche runout zones.

Lawinenprobleme

  • Cornices

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–2
    We expect increasing occurrences of natural cornice failures, due to sustained high freezing levels.

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–3
    Expect loose wet avalanches initiation to spread to moderate-angled terrain, as the snowpack becomes totally isothermal. Later in the forecast period, these could gouge to ground and entrain alot of mass.

  • Wet Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    2–3
    The free water generated by snowmelt will make ground surfaces wet, possibly causing areas with existing glide cracks to avalanche to ground. These avalanches would be very large.

Weather Forecast

A real heat wave is forecast, with the freezing level climbing steadily on Monday, to hover around 3800m for Tuesday and Wednesday. That's about as high as the top of Mt Robson! Mainly sunny skies and light winds don't promise much cooling, although on the clearest nights we could get some very temporary surface crust recovery.

Snowpack Summary

The snowpack is isothermal (punchy and wet to ground). Surface and near-surface Crusts may recover briefly after cool, clear nights, but will rapidly break down with the new day. North aspects in the alpine may be an exception, where 15cm of recently fallen snow will probably be moist, overlying a crust. Low, sunny slopes in the East are dry.

Avalanche Summary

Numerous small (Size 1 - 1.5) Loose Wet avalanches were observed on Friday and Saturday, as 20cm of cold storm snow became moist. A Size 1 cornice fall was observed on Sunday morning.

Confidence

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