Bulletin d’avalanche

Jasper

Dec 17 – 18, 2015Parks Canada
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Archivé · expiré 11 years ago

Danger d’avalanche

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

Cold overnight temperatures can make hanging ice features like daggers and pillars brittle. Be cautious exposing yourself to these type of features.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    A thin windslab can be found in lee areas at treeline and into the alpine. Several natural avalanches started with this slab and then stepped down to full depth releases in the alpine following last weeks storm.

  • 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

Thursday shaping up to be another great day in the mountains. Cold overnight temps in the -15 to -20 range with some recovery during the day and, downright pleasant in the sun and out of the wind. Models forecasting light winds from the west. Snow forecast to come in Friday and into Saturday though it might be too early to make guesses on how much.

Snowpack Summary

The snow pack is consistently supportive with little variation in mid-pack density above 2000ms. Excellent quality touring and skiing at all elevations. Cold overnight temps promoting surface facetting. 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

Régions couvertes