Bulletin d’avalanche

Northwest Coastal

Dec 27 – 28, 2017Avalanche Canada
Voir sur la carte
Archivé · expiré 9 years ago

Danger d’avalanche

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

Points saillants

Outflow winds return. Lingering wind slabs in exposed terrain remain the main concern.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Wind slabs are likely lingering around ridge crests and exposed gullies after a strong bout of outflow winds. Wind slabs may be poorly bonded to a buried crust.

Confidence

Moderate - Wind speed and direction is uncertain

Weather Forecast

THURSDAY: Cloudy with some light flurries, strong outflow winds, treeline temperatures around -15 C. FRIDAY: Clearing throughout the day, moderate outflow winds, treeline temperatures around -17 C.SATURDAY: Sunny, moderate winds, treeline temperatures around -15 C.

Avalanche Summary

No recent avalanches have been reported. A skier remotely triggered a large wind slab (size 2) near the Shames area on Sunday. The avalanche was triggered on a steep south-facing rocky ridgetop at 1400 m.

Snowpack Summary

Strong outflow winds dramatically affected the surface snow over the past week, scouring some slopes down to an old crust and forming hard deposits in many other areas. Sheltered areas may still have 30 cm of powder from previous storms, but winds have come from a variety of directions and affected much of the terrain. Wind slabs rest on a variety of old surfaces including a thick melt-freeze crust. In some sheltered locations, soft feathery surface hoar crystals may sit above the crust.The snowpack is reported to be generally strong below this crust, with the possible exception of areas around Stewart and northern parts of the region where the late-October crust can be found deep in the snowpack. Weak sugary snow may exist around the crust and could be triggered from shallow snowpack areas.

Régions couvertes