Bulletin d’avalanche

Jasper

Dec 23 – 24, 2012Parks Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Ice climbers be aware of slopes where loose avalanches and terrain traps could have significant consequences. 

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–3
    Thursday's 10 cm of snow has buried the wind slabs which formed earlier this week. Winds have shifted from S to N. Watch for reverse loading patterns.

  • 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 being likely trigger spots.

Weather Forecast

A weak low may pass through area Sunday into Monday but the Arctic air will continue to dominate with cold temperatures, sunny breaks, light flurries, and light N winds. A possible temperature inversion may develop over the next few days.

Snowpack Summary

Thursday's 10 cm of new snow in the Icefields area has buried previous wind slabs on NE aspects, tree line and above. The mid-pack remains supportive however it is quickly loosing strength in shallow locations.

Avalanche Summary

Friday's avalanche control work at the Icefields released several loose size 2 avalanches in thin steep snowpack areas below treeline. Natural avalanches have been limited to similar characteristics, steep, rocky, thin areas creating loose avalanches.

Confidence

The weather pattern is stable

Régions couvertes