Bulletin d’avalanche

Jasper

Jan 4 – 5, 2022
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Archivé · expiré 5 years ago

Danger d’avalanche

Wed
Thu
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

Expect to find hard wind slabs in unusual locations as the aftermath of strong variable winds.With another cold spell creeping in, make sure to pack the extra layer or two.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2

    Variable wind directions have caused reverse loading. Strong to extreme winds in the past few days had a potential to create wind slabs farther down the slopes. Careful assessment is required with local terrain influences.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    1.5–3

    Natural deep avalanches are getting less frequent yet it remains a low probability and high consequence event if you push your luck.

Snowpack Summary

Up to 15 cm of new snow being redistributed by strong winds. Wind slabs to be expected at all elevations. Cold temps penetrated deep into the upper snowpack promoting faceting. The mid-pack is supportive with the Dec 1st interface down 40cm in most locations. Basal faceting continues below the Nov 5 crust about 15cm up from the ground.

Avalanche Summary

On Monday, field team in the parkway region saw no new avalanches, poor visibility to be considered. Saturday's explosive control on Medicine Slabs produced loose dry and fast moving facet avalanches to the road from steep treeline terrain.

Confidence

Due to the number of field observations

Weather Forecast

Tuesday: Precipitation: Nil. Alpine temperature: High -18 °C. Light ridge wind.

Wednesday: Precipitation: Nil. Alpine temperature: Low -23 °C, High -18 °C. Ridge wind west: 10 km/h.

Thursday: Mainly cloudy with scattered flurries. Accumulation: 5 cm. Alpine temp: Low -23 °C, High -14 °C. Ridge wind southwest: 10 km/h.

Régions couvertes