Lawinenlagebericht

Waterton Lakes

Mar 23 – 26, 2015Parks Canada
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Archiviert · abgelaufen 12 years ago

Lawinengefahr

Wed
Thu
Hochgebirge
3 · Erheblich
Waldgrenze
2 · Mässig
Unterhalb
1 · Gering
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Kernpunkte

Cooler temperatures will allow for up to 20cm of snow this week but watch for warming on Thursday to bring an increase in the avalanche hazard.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–3
    Although thin in many areas, there are some significant slabs that have grown along the ridge crests. While warm temps limited growth at TL, be prepared for larger slabs above. New snow and continued west winds will continue to build these slabs.

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–2
    Heating on Thursday will likely provide quite a jolt to accumulating new now. Expect moist activity in the surface snow.

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    2–3
    These layers from early season are still a concern on N aspects in the alpine, especially in shallow snowpack areas.

Weather Forecast

Freezing levels should remain below 1900m with snow and then light snow to bring up to 20 cm by late Wednesday while west winds continue with moderate and even strong gusts . Thursday will bring a significant change with freezing levels rising to over 2500m as part of a  warming trend that looks like it will continue into Friday

Snowpack Summary

Rain and solar heating created surface crusts below 2200m and to ridge top on solar slopes. 5 to 10 cm of new snow Saturday, as well as extensive amounts of snow available from last week, has been redistributed by strong Westerly winds to create extensive wind effect and slabs TL and ALP. The snowpack BTL is dwindling: not much remains below 1800m.

Avalanche Summary

It has been a fairly active week with high freezing levels driving a prolonged cycle. Storm and winds slabs that developed from last week's storms failed TL and above to size 2.5 mainly as a result continued wind loading. Extensive loose moist activity to sz 2 associated with rain or solar heating has affected many slopes mainly TL and below.

Confidence

Freezing levels are uncertain on Thursday

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