Bulletin d’avalanche

Jasper

Feb 10 – 11, 2022
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Archivé · expiré 5 years ago

Danger d’avalanche

Fri
Sat
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré

Points saillants

Elevated freezing levels expected into Thursday with minimal refreeze overnight.This  may trigger deeper instabilities.

follow 511 for most up to date road closures.

Problèmes avalancheux

  • Wind Slabs

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

    Watch for wind slabs in cross-loaded features and further down the slopes than usual due to wind intensity. Our team is more concerned about this problem in the tree line elevation band.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–3.5

    Warm temperatures may increase reactivity of this layer.  Persistent slabs sit over different weak layers depending on elevation & aspect. Investigate these layers before committing as there is a lot of variability dependent on aspect and elevation.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–1.5

    With rising freezing levels watch for wet loose avalanches. Minimal overnight freeze expected on Wednesday night, do not count on recovery of the surface snow on Thursday.

Snowpack Summary

Moist surface snow with rising freezing levels and warm temperatures persisting into Thursday. Strong SW winds have stripped exposed alpine to rock. We expect wind slabs in crossloaded features and into tree line.  Several December faces layers can be found in the midpack. Facets and depth hoar are formed near the ground.

Avalanche Summary

Road Patrol did not observe any natural activity today. On Tuesday one large wind slab avalanche was noted on Fluted Peak on a south facing feature.

Confidence

Freezing levels are uncertain

Weather Forecast

Thursday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: High -2 °C.

Mostly light ridge wind occasionally gusting to 50 km/h.

Freezing level: 1900 metres.

Friday

Sunny

Precipitation: Nil.

Alpine temperature: Low -10 °C, High -5 °C.

Mostly light ridge wind occasionally gusting to 55 km/h.

Freezing level at valley bottom.

Régions couvertes