Bulletin d’avalanche

Jasper

Jan 18 – 19, 2014Parks Canada
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Archivé · expiré 13 years ago

Danger d’avalanche

Sat
Sun
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
3 · Marqué
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Points saillants

It will be difficult to find good quality skiing this weekend but travel conditions should be good.  We expect ice climbing conditions to be excellent!

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    Windslabs have been triggered on this interface buried in the snowpack as well as deeper on the basal facet layer.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3
    The basal facet layer is of great concern as it is  the most significant weakness in this year's snowpack.  Use extra caution in areas that have not previously avalanched, especially on open treeline slopes.

Weather Forecast

Temperatures will drop tonight and rebound to +5 to +7 at Treeline on Saturday.  Winds will continue to be light from the SW and sunny skies are forecast.

Snowpack Summary

Warm temperatures are promoting settlement in the snowpack. A supportive mid-pack can be found in sheltered locations.  Last weekend's storm has been stripped by extreme Northerly winds.  Wind slabs are present on lee slopes and in cross-loaded gullies. Weak basal facets are present on slopes where they haven't either slid or been blown away. 

Avalanche Summary

No new observations today.  The crew at Marmot reported minimal results on their control work, the exception being a size 2.5 on a SE facing Alpine slope on the basal facets.  Yesterday's control work on the Icefields Parkway yielded large avalanches to size 3 on all alpine aspects releasing on either the storm snow interface or on basal facets.

Confidence

Freezing levels are uncertain on Saturday

Régions couvertes