Bulletin d’avalanche

Jasper

Apr 24 – 25, 2017Parks Canada
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Archivé · expiré 9 years ago

Danger d’avalanche

Wed
Thu
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

Forecast reflects the highest hazard of the day, most often by early afternoon. New snow amounts vary through the forecast area! 

Problèmes avalancheux

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3
    Cornice failures are still being noted periodically on West aspects 2500-2800m. Give them a wide berth as their failure is hard to predict but increases with sun, warmth, wind-loading, or new snow.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Warm temperatures and direct solar radiation influence the distribution and magnitude. Freezing overnight temperatures decrease the danger in the morning until it warms up increasing the hazard. Most widespread on solar facing slopes.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–4
    The deep instability could be triggered by a cornice failure. It is well bridged by a solid mid-pack; however, consider this problem becoming more active particularly on South aspects as the day warms up or the sun comes out.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Tuesday

Avalanche Summary

No new avalanches noted or reported.

Weather Forecast

Weather models still suggest that Monday evening could bring 10-20cm of snow and showers below 2200m. Short intense storms continue to move through the forecast area. Broken skies and light southerly winds for the day Tuesday, clearing overnight and into Wednesday.

Snowpack Summary

Recent HST has improved skiing significantly. New snow expected overnight Monday, variable amounts up to 15cm forecast for some locations. Spring continues to penetrate deeper into the upper snowpack, which is often saturated by the late afternoon. The solid mid-pack bridges the weak base. The bottom snowpack is mixed facets and depth hoar.

Régions couvertes