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Avalanche Forecast

Archived

Apr 12th, 2025–Apr 13th, 2025

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.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Coquihalla, Harrison-Fraser, Manning, Skagit.

Up to 15 cm of recent snow in the alpine and strong variable wind formed wind slabs on a variety of aspects that may remain reactive to human triggers.

Confidence

High

Avalanche Summary

No new avalanches were reported on Friday.

NOTE: Observations are currently very limited in this region.

Snowpack Summary

Up to 15 cm of recent snow in the alpine and strong variable wind may have formed small wind slabs on a variety of aspects at upper elevations. The recent snow sits on top a crust.

Recent snow amounts taper quickly with elevation.

The snowpack is generally well-settled and strong.

Lower elevations are melting out rapidly.

Weather Summary

Saturday Night

Clear. 10 to 20 km/h west ridgetop wind. Treeline temperature -5 °C. Freezing level 700 m.

Sunday

Sunny. 5 to 10 km/h southwest ridgetop wind. Treeline temperature 2 °C. Freezing level 2000 m.

Monday

Mix of sun and cloud. 10 to 20 km/h south ridgetop wind. Treeline temperature 7 °C. Freezing level 2700 m.

Tuesday

Sunny. 10 to 20 km/h southwest ridgetop wind. Treeline temperature 4 °C. Freezing level 2300 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • Recent wind has varied in direction, so watch for wind slabs on all aspects.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

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.