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Avalanche Forecast

Archived

Apr 10th, 2025–Apr 11th, 2025

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

Coquihalla, Harrison-Fraser, Manning, Skagit.

Fresh wind slabs are likely along ridgelines and in alpine terrain.

Confidence

Moderate

Avalanche Summary

While direct observations are lacking, recent storms likely produced wind slab and wet loose activity. As temperatures cool on Friday, wind slabs at upper elevations will be the main concern.

Snowpack Summary

Up to 20 cm of new snow is possible in higher terrain Thursday night, likely to be heavily wind-affected. Amounts will taper off quickly below treeline, though the exact rain-snow line remains uncertain.

The new snow is expected to bond well to an otherwise strong and well-settled snowpack.

Lower elevations are melting out rapidly.

Weather Summary

Thursday Night

Cloudy with 10 to 20 cm of snow above 1200 m. 60 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level drops from 2000 to 1200 m.

Friday

Cloudy with 0 to 4 cm of snow. 20 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1500 m.

Saturday

Mix of sun and cloud with 5 to 10 cm of snow. 30 km/h west ridgetop wind. Treeline temperature -5 °C. Freezing level 1300 m.

Sunday

Sunny. 10 km/h southwest ridgetop wind. Treeline temperature +2 °C. Freezing level 2100 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be especially cautious as you transition into wind-affected terrain.
  • Dial back your terrain choices if you are seeing more than 20 cm of new snow.
  • A hard crust on the snow surface will help strengthen the snowpack, but may cause tough travel conditions.

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.