Bulletin d’avalanche

Purcells

Dec 21 – 22, 2022Avalanche Canada
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Archivé · expiré 4 years ago

Danger d’avalanche

Fri
Sat
Alpin
1 · Faible
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

Very cold temperatures are likely the biggest hazard in the backcountry right now. Make conservative plans, even a small accident can have big consequences.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–1.5

    Wind slab could be found in isolated features on all aspects in the alpine. These slabs could be more reactive where they overlie facets.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    1.5–2.5

    A layer of surface hoar, facets and, a crust from mid november is buried around 40 cm deep but can be found down as much as 80 cm. This layer is becoming increasingly hard to trigger but could still be sensitive to rider traffic on isolated slopes at treeline where the snow above feels stiff and consolidated.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported in the past few days.

If you are headed into the backcountry please consider filling out a Mountain Information Network report.

Snowpack Summary

The upper snowpack at treeline and above is made up of wind effected surfaces and loose faceted snow in sheltered terrain.

The main layer of concern is the mid-November layer, which is made up of either surface hoar, facets, or crusts. It is now buried 40 to 80 cm deep. Avalanche activity on this layer has tapered off but it could still be possible to trigger this layer in isolated terrain features near treeline.

Alpine snowpack distribution is variable, with depths ranging from 70 to 140 cm.

Weather Summary

Tuesday Night

Flurries bringing trace amounts of new snow with light winds shifting from west to northeast by the morning. Low of -31 at -2000m.

Wednesday

Mostly sunny with no new snow expected. Light northeast winds and a high of -29 at 2000m.

Thursday

Mostly sunny with no new snow expected. Light variable winds and a high of -31 at 2000m.

Friday

Cloudy with trace amounts of new snow expected. Southwest winds increasing throughout the day. High of -25 at 2000m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.

Régions couvertes