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Avalanche Forecast

Archived

Nov 22nd, 2024–Nov 23rd, 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.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Coquihalla, Manning, Skagit.

Assess for wind slabs at higher elevations before committing to consequential terrain.

Confidence

Low

Avalanche Summary

We haven't received any recent reports of avalanche activity. Looking forward, it may be possible for riders to trigger slabs, particularly in wind-loaded terrain features at treeline and alpine elevations.

Watch out for early-season hazards like creeks, logs, and rocks, particularly at lower elevations.

Please consider sharing any observations you have on the Mountain Information Network.

Snowpack Summary

Around 100 cm of snow is found in the alpine, with the snowpack depth rapidly dropping with elevation below treeline. Recent snow and strong wind have formed storm and wind slabs, which are likely starting to bond to the snowpack.

Various melt-freeze crusts are found in the bottom half of the snowpack but are not avalanche concerns.

Weather Summary

Friday Night

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

Saturday

Mostly cloudy. 10 to 20 km/h south ridgetop wind. Treeline temperature -4 °C. Freezing level 1400 m.

Sunday

Mostly cloudy with 0 to 2 cm of snow. 10 to 20 km/h south ridgetop wind. Treeline temperature -4 °C. Freezing level 1100 m.

Monday

Cloudy with 0 to 2 cm of snow. 10 to 20 km/h south ridgetop wind. Treeline temperature -4 °C. Freezing level 1100 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks, or recent avalanches.
  • Be cautious of buried obstacles, especially below treeline.

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.