Bulletin d’avalanche

Waterton Lakes

Jan 18 – 21, 2020Parks Canada
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Archivé · expiré 7 years ago

Danger d’avalanche

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

Continued strong winds and a temperature swing from -30° to 0° will keep the hazard elevated over the next few days, especially in thinner snowpack areas. 

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2.5

    Strong westerly winds will continue to form windslabs in the alpine and treeline.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - 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

Saturday: 5cm of new snow with continued strong westerly winds, with an alpine high of -10.

Sunday: Mainly sunny with isolated flurries with continued strong west wind and a high of -1

Monday: Sun and cloud with (you guessed it) strong west winds, and freezing levels rising to 1700m

Snowpack Summary

25-40cm of recent storm snow remains light and fluffy in sheltered areas, but has been heavily wind affected at upper elevations by west winds, especially towards the divide. The midpack is facetted in the front ranges, but remains strong and well settled in the Cameron lake area. The base of the snowpack consists of a weak facet layer.

Avalanche Summary

A couple small windslabs were observed in steep ridgetop lees along the Akamina Parkway.

Confidence

Freezing levels are uncertain on Monday

Régions couvertes