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Avalanche Forecast

Archived

Apr 6th, 2025–Apr 7th, 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, Manning, Skagit.

Forecast snow and southerly wind may form fresh wind slabs at upper elevations.

Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.

Confidence

Moderate

Avalanche Summary

No new avalanches were reported on Saturday.

NOTE: Observations are currently very limited in this region.

Snowpack Summary

Forecast snow and southerly wind may form small wind slabs at upper elevations. The new snow will overlie wet snow.

An old persistent weak layer may still be present 100 to 150 cm below the surface on high north-facing slopes.

Treeline elevations still hold over 200 cm of snow, but coverage is rapidly thinning at lower elevations.

Weather Summary

Sunday Night

Mostly cloudy with flurries, 5 to 15 cm snow above 2000 m, rain below. 20 to 30 km/h south ridgetop wind. Treeline temperature 1 °C. Freezing level 2100 m.

Monday

Mostly cloudy with isolated flurries, 3 to 15 cm snow. 10 to 20 km/h south ridgetop wind. Treeline temperature 1 °C. Freezing level 1900 m.

Tuesday

Mostly cloudy with isolated flurries, 0 to 5 cm snow. 10 to 20 km/h south ridgetop wind. Treeline temperature -1 °C. Freezing level 1700 m.

Wednesday

Partly cloudy. 5 to 10 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1800 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

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.