Lawinenlagebericht

Jasper

Dec 19 – 20, 2020
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Archiviert · abgelaufen 6 years ago

Lawinengefahr

Sun
Mon
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
2 · Mässig
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Kernpunkte

A series of storms will enter the region over the next three days. The more snow and wind we receive the higher the avalanche danger. Avalanche control forecasted on 93N between Saturday and Tuesday afternoon. Check 511 for up to date information.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–2.5

    New snow and moderate to strong winds forming wind slabs on leeward and cross-loaded terrain features.

  • Storm Slabs

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

    New snow may create soft slabs and be reactive on the Dec 14th layer

  • Deep Persistent Slabs

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

    Be cautious of thick to thin snowpack areas being likely trigger locations. The new windslabs forming have the potential to step down to the weakness at the base of the snowpack.

Weather Forecast

Fri night and Sat: Flurries. Accumulation: 16 cm. Alp tmp: High -6 C. Mostly light ridge wind occasionally gusting to 40 km/h. Freezing level: 1500 metres.

Sunday: Periods of snow. Accumulation: 16 cm. Alp tmp: Low -9 C, High -3 C. Mostly light ridge wind occasionally gusting to 40 km/h. Freezing level: 1700 metres.

Mon and Tues: Accumulation: 23 cm.

Snowpack Summary

SW winds and new snow will continue to build wind slabs in the alpine and open treeline. Possible surface hoar down 25cm in sheltered locations treeline and below. The midpack is generally supportive with a weaker base consisting of facets and some locations depth hoar. Average depth is 65cm - 160cm depending on region and elevation.

Avalanche Summary

Road patrol south today one recent size 2.5 avalanche was observed out of a East facing alpine feature in the Mount Wilson area otherwise nothing else observed. Visibility was to ridgetop. Over the last three days compression tests in the ice fields treeline and below produced no results.

Confidence

Intensity of incoming weather systems is uncertain on Friday

Abgedeckte Regionen