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Avalanche Forecast

Archived

Feb 23rd, 2024–Feb 24th, 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 unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Microwave-Sinclair, North Bulkley, South Bulkley, South Bulkley, South Bulkley, Telkwa.

With new snow and wind in the forecast, fresh reactive wind slabs will be the the main character this weekend.

Confidence

Moderate

Avalanche Summary

No new avalanche observations since Thursday when a small (size 1) wind slab was triggered by a sledder. It occurred on a steep alpine slope where a firm wind slab sat atop a weak faceted, shallow snowpack.

Snowpack Summary

Small amounts of new snow falls over 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 over 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

Friday night

Cloudy with a trace of snow. 40 to 60 km/h northwest ridgetop wind. Treeline temperature -9 °C.

Saturday

Cloudy with up to 10 cm of snow. 40 to 60 km/h west ridgetop wind. Treeline temperature -3 °C.

Sunday

Mostly cloudy with 5 to 15 cm of snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Monday

5-10 cm overnight then clearing to a mix of sun and cloud. <20 km/h northeast ridgetop wind. Treeline temperature -15 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • 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.