Bulletin d’avalanche

Jasper

Nov 26 – 27, 2012Parks Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Mon
Tue
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

The storm snow appears to be bonding well and stability is improving, but wind slabs may still be triggered by light loads in specific terrain features.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    Natural avalanches are being reported involving the top 10-30cm of the snowpack, suggesting that new wind slabs are touchy in wind loaded areas, particularly in the alpine.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    2–3
    Previous wind slabs can be found buried beneath the recent storm snow in exposed terrain. The increased load on these slabs from the recent snowfall may increase their likelihood of triggering.

Weather Forecast

Partly cloudy with isolated light flurries for the next couple of days. Predominantly light SW winds and temps in the -5 to -10 range.  Potential for 5-10cm on Wednesday. 

Snowpack Summary

Between 50 and 70cm of new snow since Nov 19 in the CIA.  This new snow appears to be bonding well and has been subjected to relatively light winds (at TL), mainly SW. Lots of snow available for transport. May be approaching critical load on Nov crusts.

Avalanche Summary

Several Na and Xe  yesterday at Marmot Basin in the 2-2.5 range, NE aspects above 2400m.  Isolated Na activity in the CIA, cross loaded features at TL.  No activity on the Nov crusts, all observed avalanches were in the top 50cm and involved WSL.

Confidence

Due to the number of field observations

Régions couvertes