Bulletin d’avalanche

Lizard-Flathead

Apr 12, 2018Avalanche Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

Fri
Sat
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

Forecast new snow and wind are expected to create fresh wind slabs reactive to human triggers.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–1.5
    New snow and strong winds will form thin slabs in leeward areas near ridge crests and convex features. These slabs may be touchy were they sit on a recent crust.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Rising freezing levels and daytime warming have been triggers for recent large, loose, wet avalanches. Once moving, a loose, wet release may have the potential to trigger a slab on a deeper weak layer.

Confidence

Moderate - Due to the number of field observations

Weather Forecast

THURSDAY: 5-10 cm new snow. Moderate to strong southeasterly ridgetop winds. Freezing level around 1300 m.FRIDAY: Mostly sunny. Moderate westerly ridgetop winds. Freezing level rising to around 1800 m.SATURDAY: Mix of sun and cloud. Strong southwesterly ridgetop winds. Freezing level rising to around 2000 m.

Avalanche Summary

No new avalanches were reported in this region on Tuesday.

Snowpack Summary

Rising freezing levels have caused the recent 25 cm of storm snow to become moist up to ridge top elevations, with minimal overnight re-freeze. Below 1400 m, rain has soaked the snow surface.There are some reports of a surface hoar layer roughly 100 cm deep on north aspects at treeline, but no recent avalanche activity on this layer. Below this, the mid-pack is generally well settled and strong.A layer of sugary facets around a crust exists near the bottom of the snowpack, but this layer has been inactive for some time.

Régions couvertes