Bulletin d’avalanche

South Rockies

Mar 4, 2019Avalanche Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

Tue
Wed
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
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Points saillants

Cold dry conditions continue. Watch for signs of instability as you travel, such as whumpfing, cracking, and recent avalanches.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Recent snow has formed wind slabs that may be reactive to human triggering at upper elevations.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    2–2.5
    In deeper snowpack areas, a surface hoar layer buried 30-60 cm deep may still be reactive. It is most prominent between 1600 and 1900 m.

Weather Forecast

SUNDAY NIGHT: Clear, light northeast wind, alpine temperatures drop to -22 C.MONDAY: Sunny, light northeast wind, alpine high temperatures near -13 C.TUESDAY: Sunny with cloudy periods, light northeast wind, alpine high temperatures near -10 C.WEDNESDAY: Cloudy with isolated flurries, light southeast wind with moderate gusts, alpine high temperatures near -10 C.

Avalanche Summary

No new avalanches were reported on Sunday. On Saturday and Friday, a few small wind slab avalanches (size 1) were triggered by skiers and some small natural wind slabs were observed.

Confidence

Moderate - Due to the number of field observations

Snowpack Summary

10-20 cm of recent snow with moderate winds has likely formed wind slabs in exposed terrain. Older wind slabs will be buried under the new snow and may be difficult to detect. Cold temperatures have been transforming most of the snowpack into soft faceted snow. In thicker snowpack areas, you may find a slab sitting above a weak layer of facets and surface hoar that was buried in mid-January and is now 30-60 cm deep. This layer is most prominent in the Elk Valley between 1600 m and 1900 m. Snowpack tests and avalanche reports on this layer suggest that human triggering is still a lingering concern.

Régions couvertes