Bulletin d’avalanche

South Coast

Dec 5, 2017Avalanche Canada
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Archivé · expiré 9 years ago

Danger d’avalanche

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

Warm temperatures and sun cause unstable snow, especially in the afternoon. If the snow is moist or mushy, dial back your terrain selection and avoid cliffs, gullies and steep slopes with trees.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Recent snow and wind resulted in slab avalanche conditions in steep and/or exposed terrain at the highest elevations. Be careful around broad open slopes and steep terrain, especially where you can feel the November 26th crust with your ski pole.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–2
    Conditions will be more like spring than winter this week. Surface snow layers will become weak when hit by the sun. Minimize your exposure to terrain traps - even small sluffs can push you into dangerous terrain.

Confidence

High - The weather pattern is stable

Weather Forecast

We're looking at fine weather for the foreseeable future. Significant warming begins Tuesday afternoon, with temperatures eventually forecast to hit double digits at mountaintop!!!Tuesday: Mainly sunny and becoming warm up high. Freezing levels rising to 2000 m. Light northerly winds.Wednesday: Sunny and warm. Light northerly winds. Freezing levels 3300m. Alpine high temperatures to +11 Celsius!Thursday: Sunny and warm. Light northerly winds. Freezing levels 3200m. Alpine high temperatures to +11 Celsius!

Avalanche Summary

On Sunday we had a report of a Size 1.5 natural wind slab avalanche by Sky Pilot Mountain on a northerly aspect near 1500m. See here for the MIN report. A significant travel hazard on Tuesday may be snow falling off heavily laden trees (aka tree bombs) as the freezing level heads towards 3000m and temperatures rise quickly.

Snowpack Summary

Late last week through to Saturday we saw significant storm snow totals, on the order of 80-100cm in the North Shore mountains. That said, all the new snow appears to be bonding well to a crust (down 80-100cm at tree line elevations) and stabilizing rapidly. Travel has improved below tree line, but there are still open creeks, alder and other early season hazards. Expect snow depths of around 60 cm at 800 m and around 200 cm at 1200 m.

Régions couvertes