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Avalanche Forecast

Archived

Feb 22nd, 2024–Feb 23rd, 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, 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.

Regions

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

As winds intensify and some areas receive new snow, keep an eye out for wind slab development in steep, exposed alpine terrain.

Confidence

Moderate

Avalanche Summary

A small (size 1) wind slab avalanche was triggered on Thursday by a sledder. It occurred on a steep alpine slope where a firm wind slab sat atop a weak faceted, shallow snowpack.

Snowpack Summary

Any new snow will bury generally faceted and wind-affected surfaces. Winds will redistribute any loose surface snow into lee terrain features.

In steep, exposed alpine terrain, old, hard wind slabs may sit atop weak faceted crystals and a crust, down roughly 20 to 30 cm from the surface.

The mid and lower snowpack is generally well-bonded and strong.

Weather Summary

Thursday Night

Clouds building overnight with 0 to 2 cm of snow. 40 to 60 km/h west ridgetop wind. Treeline temperature -5 °C.

Friday

Cloudy with 0 to 5 cm of snow. 50 to 70 km/h west ridgetop wind. Treeline temperature -5 °C.

Saturday

Cloudy with 0 to 10 cm of snow. 40 to 60 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Sunday

Mostly cloudy with 0 to 10 cm of snow. 20 to 40 km/h northwest ridgetop wind. Treeline temperature -8 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully evaluate bigger terrain features on an individual basis before committing to them.
  • Use caution when approaching steep and rocky terrian.
  • Wind slabs are most reactive during their formation.

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.