Bulletin d’avalanche

Jasper

Jan 9 – 10, 2017Parks Canada
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Archivé · expiré 10 years ago

Danger d’avalanche

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

10cm of forecasted snow with light winds keeping the Avalanche Hazard at Moderate. If winds increase before Tuesday the Avalanche Hazard will rise with them. Stay tuned in to changing weather conditions in your area.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–3
    Cold temperatures and hard slab conditions make triggering less likely. Triggering from shallow spots or in loaded gullies remains a possibility.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Faceting of the surface snow is causing it to lose cohesion and release loose dry avalanches in steep terrain. Particularly concerning for ice-climbers in confined terrain.

Weather Forecast

Snow starting late Sunday night and throughout Monday, up to 15cm. Winds are expected to be light during the storm then blow moderate from the NW on Tuesday as they bring back the cold dry air (below - 20). A temperature inversion was observed along the Parkway today, up to 10 degrees warmer at higher elevations.

Snowpack Summary

The snowpack is shallow, faceted and weak. The Nov. crust can still be found about 30 cm from ground but is faceting into large depth hoar. The upper half of the snowpack has layers of wind slabs.

Avalanche Summary

Within the past 48hrs, several Sz 2.5 slab and Sz 1.5 loose dry avalanches observed along the Icefields Parkway. Pockets of slab pulling out in cross loaded gullies, 30-40 degree slopes on Westerly aspects. Loose dry activity on all aspects and elevations.Recent cold temps have made free hanging ice brittle and is breaking off.

Confidence

Intensity of incoming weather systems is uncertain on Monday

Régions couvertes