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Avalanche Forecast

Archived

Apr 4th, 2024–Apr 5th, 2024

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Northwest Coastal, Boundary, Kitimat, Nass, Rupert, Seven Sisters, Shames, Stewart, Howson, Ningunsaw, Ningunsaw, Ningunsaw.

Continue to assess for signs of instability. Isolated storm or wind slabs may linger at higher elevations.

Confidence

High

Avalanche Summary

Numerous, natural loose wet avalanches up to size 2 were reported Wednesday, primarily on steep south-facing terrain and at lower elevations.

On Wednesday a few human-triggered storm or wind slab avalanches were reported throughout the region, occurring at treeline or above, and no larger than size 1.

Snowpack Summary

Approximately 40 cm of recent snow has buried a widespread crust in all but sheltered, north-facing slopes where isolated pockets of surface hoar and/or faceted grains may exist below the new snow.

Previously problematic layers deeper in the snowpack appear to have bonded and strengthened, however, there is a low likelihood that they could remain a risk in steep, north-facing, high alpine terrain.

Weather Summary

Thursday Night

Mostly clear skies. 0 to 20 km/h north ridgetop wind. Treeline temperature -5 °C. Freezing level 600 m.

Friday

Partly cloudy. 10 to 30 km/h south ridgetop wind. Treeline temperature -4 °C. Freezing level 1000 m.

Saturday

Mostly cloudy with 2 to 8 cm of snow. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1200 m.

Sunday

Mostly cloudy with 2 to 10 cm of snow. 50 to 70 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Make observations and assess conditions continually as you travel.
  • Don't be too cavalier with decision making, storm slabs may remain sensitive to human triggering.
  • Avoid areas where the snow feels stiff and/or slabby.
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.