Bulletin d’avalanche

Waterton Lakes

Jan 24 – 27, 2020Parks Canada
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Archivé · expiré 7 years ago

Danger d’avalanche

Sat
Sun
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré
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Points saillants

Overnight freezing levels will be high, allowing warm temperatures to saturate the front range snowpack. Watch out for wet loose avalanches at tree line and below east of the divide.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–3

    If the snowpack dose not freeze overnight the hazard will be significantly higher.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–3

    As temperatures warm, the basal facets may become a player again, especially in the relatively shallow front ranges. Consider overhead hazard, the consequence of a small avalanche triggering a deeper slab, and stick to deep well supported terrain.

Weather Forecast

Thursday night: Freezing level 1600m with 1- 2 mm of precipitation.

Friday: Mainly Cloudy. Freezing level 1800m. Moderate to Strong SW wind. 1-2 mm of precipitation.

Saturday: A mix of sun and cloud with isolated flurries. Freezing level 1400m. Wind SW.

Sunday: Cloudy.1-5mm of precipitation. Freezing level 1400m.

Snowpack Summary

Strong to extreme SW winds have formed wind slabs at all elevations. These windslabs have the potential to trigger weak layers deep in the snowpack during this warm period. The base of the snowpack consists of crusts and weak facets formed early in the season. The snowpack east of the divide is significantly shallower and inherently weaker.

Avalanche Summary

Public report of Natural Sz 1-1.5 loose wet avalanche activity at Bertha Lake on Thursday January 23.

Confidence

Freezing levels are uncertain

Régions couvertes