Bulletin d’avalanche

Waterton Lakes

Jan 23 – 26, 2022
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Archivé · expiré 5 years ago

Danger d’avalanche

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

Alpine inversions and high freezing levels are forecasted throughout the start of the week.

Minimize overhead hazard wherever possible. Cornices weaken with high alpine temperatures.

Problèmes avalancheux

  • Wind Slabs

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

    Few natural avalanches size 1 - 2 seen steep alpine terrain around park on Saturday, Jan 22, likely triggered by solar input.

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–4

    Alpine inversions may cause cornices to weaken. Cornice triggered avalanches could step down to persistent weak layers.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2.5–4

    Strong alpine inversions and high freezing levels will test persistent layers and cornices in sheltered alpine features . Minimize overhead hazard as temps at higher elevations are likely warmer than valley bottoms.

Weather Forecast

Sun: Cloudy. Strong W winds. Alpine temperature inversion with an alpine high of -1.

Mon: Cloudy with scattered flurries, accumulation 4 cm. Moderate W winds. Alpine high -6. FL valley bottom.

Tues: Mainly cloudy with isolated flurries. Strong SW winds. Alpine temperature inversion, high -8.

Snowpack Summary

A hard rain crust exist on all aspects up to 2000m. Alpine surfaces range from hard windslab in lees and to bare ground. Well settled midpack. Facets above Dec 4 crust down 150-200 cm. A 20-60 cm thick Nov crust complex completes snowpack to ground.

Avalanche Summary

Few natural windslab avalanches, size 1 - 2, observed in park today likely triggered by solar input this afternoon. Thanks to everyone posting on the Mountain Information Network, keep up the great work, we really do read them.

Confidence

Freezing levels are uncertain

Régions couvertes