Bulletin d’avalanche

Jasper

Feb 28 – 29, 2016Parks Canada
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Archivé · expiré 11 years ago

Danger d’avalanche

Sun
Mon
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Dropped my bike helmet and scared my cat, means 22 days of winter left! Scientific Fact!Combo of building cornices and wind slab create a significant hazard for larger avalanches from above.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    The new snow will becoming in warm with consistent transport winds from the SW. Excellent slab forming conditions on lee slopes. Bonding should be good but best to progress cautiously into steep terrain.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–3
    Persistent weak layers of decomposed surface hoar, facets, and depth hoar are in many locations. These layers have been stubborn to trigger underfoot but could be triggered by cornice failure or from shallow spot.

Weather Forecast

Progressive cooling through the evening should facilitate a good recovery for Sunday morning with some warming over the day. Precip expected in the early afternoon and may initially present as moist snow or rain, especially BTL. Pulses of precip through to Monday to a max of 10cms. Freezing levels rising to 1600ms and consistent moderate Sw winds. 

Snowpack Summary

Fluctuations in solar input have left a weak crust on S through W aspects. Variable support in the am and breaking down over the day. Dry, facetted and generally uninspiring below this crust. Polar aspects offering better riding and can be worth the wallow to TL where there is more consistent support underfoot due to a more settled mid-pack. 

Avalanche Summary

Field observations in the Maligne Valley with some previous activity observed but nothing new to report. Intense transport observed in the Bald Hills area but no new activity observed from roadside.

Confidence

Régions couvertes