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Avalanche Forecast

Archived

Apr 1st, 2024–Apr 2nd, 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.
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.

Expect wind slab formation with the arrival of strong southwest winds accompanied by light snow.

Confidence

Moderate

Avalanche Summary

No recent avalanche activity has been reported.

We anticipate natural avalanche activity to occur with the arrival of strong winds and new snow.

Snowpack Summary

Expect widespread wind-affected snow surfaces, including firm, scoured surfaces in windward-facing terrain and deeper deposits around ridgelines and on lee terrain.

A layer of weak, faceted crystals overlying a crust is buried 30-60 cm in the east of the region and 50-100 cm in the west. Triggering this layer has become unlikely, except in the case of shallow snowpack spots or very large loads like cornice falls.

Weather Summary

Monday Night

Cloudy with 2 to 8 cm of snow. Freezing level 1200 m. 60 to 80 km/h southwest ridgetop wind. Treeline temperature -1 °C.

Tuesday

Mix of sun and cloud with 0 to 5 cm of snow. Freezing level 1000 m. 50 to 70 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Wednesday

Mix of sun and cloud with 0 to 3 cm of snow. 20 to 40 km/h west ridgetop wind. Treeline temperature -5 °C. Freezing level 800 m.

Thursday

Mostly sunny. 0 to 20 km/h northwest ridgetop wind. Treeline temperature -5 °C. Freezing level 800 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Wind slabs are most reactive during their formation.
  • Closely monitor how the new snow is bonding to the old surface.
  • Start with conservative lines and watch for clues of instability.

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.