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Avalanche Forecast

Archived

Apr 5th, 2024–Apr 6th, 2024

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

Regions

Northwest Inland, Kispiox, Microwave-Sinclair, North Bulkley, South Bulkley, South Bulkley, South Bulkley, Telkwa.

Wind slabs in high elevation terrain are the main concern.

Confidence

No Rating

Avalanche Summary

There was no avalanche activity reported on Wednesday or Thursday.

On Tuesday there was size 3 natural persistent slab avalanche reported on Hudson Bay Mountain on a northerly aspect in the alpine. It was suspected to be triggered by intense wind-loading. Read this MIN post for more details.

Snowpack Summary

Approximately 10 to 15 cm of new snow has buried a widespread crust. Strong winds earlier this week have likely scoured surfaces down to the crust in most windward-facing terrain while forming deeper deposits of snow in lee terrain.

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, alpine terrain.

Weather Summary

Friday Night

Mainly clear. 10 to 30 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1000 m.

Saturday

Mostly cloudy with 1 to 2 cm of snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1400 m.

Sunday

Mostly cloudy with 1 to 3 cm of snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1300 m.

Monday

Mostly cloudy with 3 to 8 cm of snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Start with conservative lines and watch for clues of instability.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Brief periods of sun could quickly initiate natural avalanche activity.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.