Bulletin d’avalanche

Northwest Inland

Apr 18 – 19, 2017Avalanche Canada
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Archivé · expiré 9 years ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

Winter continues to hang on at higher elevations. Expect loose wet avalanches on sun exposed slopes in the afternoon.

Problèmes avalancheux

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3
    Cornices are large and fragile, expect then to fall off naturally during periods of strong solar radiation and during the warmest part of the day.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Loose wet avalanches are more likely during periods of strong solar radiation and daytime warming. Snow at lower elevations may become isothermal and release from steep terrain on all aspects.

Confidence

High -

Weather Forecast

Overnight: Flurries with strong southwest winds and freezing down to valley bottoms. Wednesday: Overcast with light snow and moderate southeast winds. Daytime freezing level up to 1700 metres. Thursday: Light snow in the morning, and a mix of sun and cloud in the afternoon. Daytime freezing level up to 1800 metres. Friday: Mostly sunny with light winds and daytime freezing up to 2000 metres.

Avalanche Summary

A MIN report from Monday describes a size 2.5 wet slab from the west aspect of Elliot peak at 1900 metres elevation. It is suspected that a small storm slab avalanche stepped down to the deeply buried November crust; this may have occurred on Sunday.

Snowpack Summary

New snow falling last week has been redistributed by south and east wind at upper elevations. This is likely sitting on a hard wind crust in exposed alpine areas and sun crust on solar aspects. Lower elevations are experiencing a melt-freeze cycle and the snowpack is likely moist or wet throughout its entire thickness. A deep persistent weak layer is still lingering near the bottom of the snowpack in all areas.

Régions couvertes