Lawinenlagebericht

Jasper

Feb 21 – 22, 2021
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Archiviert · abgelaufen 6 years ago

Lawinengefahr

Mon
Tue
Hochgebirge
3 · Erheblich
Waldgrenze
2 · Mässig
Unterhalb
1 · Gering
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Kernpunkte

It's been a while, but a storm is coming!

Watch for signs of instability, and avoid overhead exposure during periods of rapid loading and rising temperatures.

Lawinenprobleme

  • Wind Slabs

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

    Strong to extreme SW winds with new snow are likely to build wind slabs in the alpine and tree line areas.

  • 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

Sunday: Periods of snow. Accumulation: 17 cm. Alpine temperature: High -6 C. Ridge wind southwest: 35 km/h gusting to 90 km/h. Freezing level at valley bottom.

Monday: Flurries. Accumulation: 7 cm. Alpine temperature: Low -14 C, High -5 C. Ridge wind west: 25 km/h gusting to 80 km/h. Freezing level: 1400 metres.

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

No new avalanches have been observed in the past couple days.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Sunday

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