Bulletin d’avalanche

Jasper

Dec 13 – 14, 2021
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Archivé · expiré 5 years ago

Danger d’avalanche

Tue
Wed
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

Fresh windslab development at upper elevations warrants caution as the new snow continues to settle. Great skiing can be found in sheltered areas at tree line and below. 

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1.5–2.5

    New snow and moderate to strong SW winds building new windslab in lee and crossloaded features. Watch for hollow sounds and cracking. Consider testing smaller slopes before committing to larger features; windslabs could initiate deep layers.

  • Loose Dry

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

    Heavy down flow observed in the Wilson region. Ice Climbers, avoid all overhead exposure.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3.5

    Triggering this layer would be a high consequence event - cautious decisions and thorough investigation is necessary. More likely to trigger this layer in transitions from thin snowpack to deeper loaded pockets or terrain features.

Weather Forecast

Tonight- Isolated flurries with trace precipitation. Alpine temp low -14 C. Wind S 15-30 km/h

Mon- Cloudy with sunny periods & isolated flurries. Trace precipitation. Alpine high -10 C. Wind SE 10-30 km/h

Tues- Flurries. Alpine temp low -17. Light ridge wind

Wed- A mix of sun & cloud. No Precipitation. Alpine temperature low -18. Wind W 10-25 km/h

Snowpack Summary

30cm of new snow in the past 36h with moderate SW wind has created new windslab near ridge top & in exposed terrain above treeline. Mid snowpack has settled well with a weak rain crust present below the recent snow upto 1800m. Another crust near the base of the snowpack continues to promote basal faceting adding to our deep persistent slab concerns

Avalanche Summary

No new activity observed on the icelfields parkway today with limited alpine visibility.

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Confidence

Due to the number of field observations

Régions couvertes