Bulletin d’avalanche

Jasper

Dec 18 – 19, 2015Parks Canada
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Archivé · expiré 11 years ago

Danger d’avalanche

Fri
Sat
Alpin
1 · Faible
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

Cold nights and mornings making ice climbs brittle. Limit your exposure to over hanging hazards like daggers and pillars as they can break without notice. 

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    New (and previously) building windslab will be found in lee areas at treeline and into the alpine.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    1–2
    The Dec3 layer down 60cm has not been associated with any observed natural activity nor has it proven to be reactive to skier traffic. Further cooling temperatures and the consistently supportive mid-pack helping increase confidence in this layer.

Weather Forecast

Another cold night Thursday evening but we should see some tolerable temps over the day Friday as a new weather system moves in over the day friday bringing a welcome refresh of snow, possibly 5 to 10cms. Winds will pick up to moderate levels with some strong gusts from the south which will affect visibility at all elevations.

Snowpack Summary

Upper snowpack losing some support due to faceting in the upper pack, still overall it is a fairly good consistent mid-pack above 2000ms and still offering excellent quality touring and skiing. Dec 3rd interface is down approx. 45-60cm but it is not easily triggered. Below 1900ms the HS is more typical of the Rockies; weak and shallow.

Avalanche Summary

No new avalanche activity observed and reported

Confidence

Intensity of incoming weather systems is uncertain on Friday

Régions couvertes