Bulletin d’avalanche

Jasper

Dec 7 – 8, 2021
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Archivé · expiré 5 years ago

Danger d’avalanche

Wed
Thu
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

Triggering deeper instabilities is still possible.Dig before you commit to your line.

Keep your MIN reports coming as your eyes on the ground are appreciated.

Problèmes avalancheux

  • Wind Slabs

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

    A triggered windslab has a potential to step down to deeper instabilities with a more destructive potential. Consider testing smaller slopes before committing to a terrain with potential for larger propagation. Watch for hollow sounds and cracking.

  • Deep Persistent Slabs

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

    Natural activity is decreasing as the recent new snow stabilizes, however, triggering this layer would be a high consequence event so cautious decisions and a thorough investigation is necessary.

Weather Forecast

Tuesday: Isolated flurries. Precipitation: Trace. Alpine temperature: High -9 °C. Ridge wind southwest: 15-30 km/h.

Wednesday: Flurries. Accumulation: 9 cm. Alpine temperature: Low -15 °C, High -7 °C. Ridge wind west: 20 km/h

Thursday:  Isolated flurries. Precipitation: Trace. Alpine temperature: Low -21 °C, High -13 °C. Ridge wind west: 20 km/h

Snowpack Summary

The midpack is quite supportive and the crust /facet /depth hoar November combo near the ground is the only layer of concern at the moment.

Avalanche Summary

No new avalanches observed in the Icefields area on Monday. Maligne area field team reported no new avalanches on Sunday.

Confidence

The weather pattern is stable

Régions couvertes