Bulletin d’avalanche

Jasper

Jan 12 – 13, 2021
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Archivé · expiré 6 years ago

Danger d’avalanche

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

Points saillants

The region is primed and overdue for a significant avalanche cycle.

New snowfall and strong SW winds forecast for the next two days. Be extra cautious, especially in open areas though-out the region.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2.5

    Ongoing Strong to Extreme SW winds continue to form wind slabs at treeline and above. They appear to be stubborn with only a few natural avalanches observed but, be vigilant as likelihood of human triggering is rising with new precipitation.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    1–3

    Use caution around thin to thick areas where buried deeper weak layers could be triggered. The surface hoar layer down 40-70cm seems unreactive and spotty distribution but keep it on your radar.

Snowpack Summary

Strong SW winds have been aggressively distributing surface snow on N through E aspects, at all elevations but especially in the alpine and open tree-line. The mid-pack is supportive except in shallow locations and regions like the Maligne range. The bottom is weak facets and depth hoar.

Avalanche Summary

No new avalanche activity observed or reported.

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Confidence

Forecast snowfall amounts are uncertain on Wednesday

Weather Forecast

A strong, moisture laced, southwest flow continues to provide steady snowfall in the Jasper forecast region, especially in the Columbia Icefields. Strong SW winds continue to build reactive wind-slabs on N through E aspects. Forecasts calling for a further 15cm for Tuesday, and 17cm Wednesday. Temps steady between -12 and -8, warming up by Weds. 

Régions couvertes