Bulletin d’avalanche

Jasper

Dec 22 – 23, 2012Parks Canada
Voir sur la carte
Archivé · expiré 14 years ago

Danger d’avalanche

Sat
Sun
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
Ouvrir la carte complète

Points saillants

Natural loose snow avalanches were observed on very steep terrain in thin snow pack areas. Ice climbers should evaluate routes and approaches that may have similar conditions above them.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    10 cm of new snow has buried the wind slabs that formed earlier this week from moderate to strong SW winds in the Icefields area.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    2–3
    The strong mid-pack above this weakness is slowly loosing its strength. This issue is more prevalent in shallow snow pack areas.

Weather Forecast

Cold cloudy conditions with light flurries and light to moderate NW winds can be expected as arctic air moves into the forecast area.

Snowpack Summary

Up to 10 cm of new snow in the Icefields area has buried recently formed wind slab on NE aspects, tree line and above. The mid snowpack remains supportive however it is quickly loosing strength in shallow snowpacks.

Avalanche Summary

Natural loose snow avalanches have been reported on steep slopes below tree line where the snowpack is thin.  Loose snow avalanches to size 2 were the result of avalanche control work on the Parkway on December 21st.  The control work was on thin steep below tree line slopes.

Confidence

Wind effect is extremely variable on Saturday

Régions couvertes