Bulletin d’avalanche

Jasper

Mar 4 – 5, 2018Parks Canada
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Archivé · expiré 9 years ago

Danger d’avalanche

Mon
Tue
Alpin
1 · Faible
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

A structurally weak snowpack making any travel, "deeply troubling" in uncompacted terrain, especially below treeline. The persistent weakness is mostly found at or near treeline.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–1.5
    Expect hardslabs in the alpine and at treeline. The cold has reduced the tension in these but caution is still warranted.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1.5–3
    A cold, facetting, and structurally weak slab up to 80cm thick overlies: faceted crystals (well developed in shallow areas), surface hoar (at, and just above treeline), and sun crusts (on steep S and W aspects).

Weather Forecast

The forecast was showing real meteorological potential for a good, late winter storm. Sadly, all the moisture has been sucked dry from the region so local snowfall amounts over the next 36 hours are expected to be light. Thankfully, it will remain cold...

Snowpack Summary

Much of the regional snowpack is losing support and, facetting after two weeks of cold, dry weather. Wind slabs and extensive wind effect is found in all open areas. The upper snowpack is a 50 to 80 cm weakening slab, over the seasonally persistent instability.

Avalanche Summary

No new avalanche activity observed or reported.

Confidence

Due to the number of field observations

Régions couvertes