Bulletin d’avalanche

Jasper

Dec 23 – 24, 2013Parks Canada
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Archivé · expiré 13 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

Early season hazards lurk just under the surface. Quality skiing is difficult to locate.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Recent turbulent winds  have redistributed snow into sheltered terrain features. Anything that is steep enough to slide and has sufficient snow to ski on should be evaluated.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3
    The Oct 27 raincrust has a sporadic distribution. An avalanche on this layer could still step down to ground and have severe consequences.

Weather Forecast

Flurries will continue this week. Possibly 5-10cm on Monday if we are lucky. Winds may increase to moderate from SW. Temperatures will remain seasonal ranging from -5 to -16. It may feel much warmer in the valley bottoms.

Snowpack Summary

Variable snow distribution at treeline and above. Wind slabs continue to develop in lee terrain features. Wind slab and a mainly facetted snowpack overlies October 27 rain crust which is distributed sporadically through the forecast area. Basal facets and depth hoar exist just off the ground.  Below treeline remains unsupportive.

Avalanche Summary

Sunday observed several size 2's, likely solar initiated, on the crossloaded gullies above Polar Circus on Mt Cirrus. They stopped mid-path. Saturday, we observed 2 size 3 avalanches on east facing cross-loaded alpine bowl near Mt. Saskatchewan/Wilson area, 2 size 2.5 on a similar aspect in the Winston Churchill range.

Confidence

Régions couvertes