Bulletin d’avalanche

Northwest Coastal

Dec 7 – 8, 2018Avalanche Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Strong shifting wind will increase the danger at higher elevations.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    With the incoming storms expect all open terrain to be wind affected. Watch for reactive wind slabs in alpine terrain and near ridgetops.

Confidence

Moderate - Intensity of incoming weather systems is uncertain

Weather Forecast

FRIDAY NIGHT: Light snowfall starting overnight with accumulations up to 10 cm near the coast and less inland, strong wind out of the south, freezing level climbing to 500 m.SATURDAY: Light flurries easing off throughout the day with accumulations of 1-3 cm, strong wind out of the south, freezing level climbing to 800 m.SUNDAY: A second storm pulse brings 10-20 cm of snow, freezing level steady around 1000 m, strong wind out of the south.MONDAY: Ongoing flurries with another 5 cm of snow, moderate to strong wind out of the southwest, freezing level around 800 m.

Avalanche Summary

No recent avalanche activity has been reported. Please post your observations to the Mountain Information Network (MIN) this weekend.

Snowpack Summary

We currently have very limited snowpack observations, but expect an average snow depth of 70-120 cm in the alpine. This decreases dramatically with elevation where the primary hazards are rocks, stumps, and open creeks.There were reports of feathery surface hoar growing on the surface last weekend in the neighboring Northwest Inland region (see this MIN report) and in Ningunsaw to the north. However, recent outflow winds have likely changed the snow surface conditions and formed stiff wind slabs in open terrain. A hard crust has been reported 10-15 cm below the surface, and in some locations there is an early season crust with facets near the bottom of the snowpack. Check out the MIN report from the Anderson Cabin near Terrace (here).

Régions couvertes