Lawinenlagebericht

Jasper

Feb 24 – 25, 2021
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Archiviert · abgelaufen 6 years ago

Lawinengefahr

Thu
Fri
Hochgebirge
3 · Erheblich
Waldgrenze
2 · Mässig
Unterhalb
2 · Mässig
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Kernpunkte

That warm feeling on your face at the end of the day is the first sign of spring!

The snowpack is feeling that effect too, be aware of overhead hazards that may be triggered by that solar warming. Ice Climbers, beware!

Lawinenprobleme

  • Wind Slabs

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

    Severe SW winds have stripped, and transported snow from many areas in the alpine and treeline.

  • Loose Dry

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

    Loose dry, spindrift avalanches remain a problem for ice climbers

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    1.5–3

    Caution in thin snowpack areas where triggering is more likely. This is a low probability but high consequence problem.

Weather Forecast

Tonight: Clear periods. Low -18 C.

Wednesday: Cloudy with sunny periods and isolated flurries. Precipitation: Trace. Alpine temperature: High -14 C. Ridge wind southwest: 20-40 km/h.

Thursday: Flurries. Accumulation: 7 cm.  Alpine temperature: Low -13 C, High -9 C. Ridge wind southwest: 25 km/h gusting to 60 km/h.

Snowpack Summary

Moderate to strong ridge top winds from the SW have created wind slabs or hard surface conditions in alpine and tree line features. In sheltered areas the top 30-60cm is faceted snow over a supportive mid-pack where the snowpack is deeper. Thin snowpack areas are weak, un-supportive, and facetted.

Avalanche Summary

Avalanche control on the Icefields Parkway Monday produced results up to size 3 in the Parkers Ridge zone. Late afternoon activity noted, pockets of loose wet, triggered from steep W aspect. Likely the result of isolated sun and 'greenhouse effect', warming in the Wilson zone.

Confidence

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