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Avalanche Forecast

Archived

Mar 20th, 2026–Mar 21st, 2026

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, Harrison-Fraser, Manning, Skagit.

Avalanches are possible at upper elevations where new snow fell as snow towards the end of the storm.

Confidence

Moderate

  • We are uncertain if precipitation will fall as rain or snow.

Avalanche Summary

A widespread natural cycle of wet avalanches occurred across the Cascades on Thursday, with avalanches up to size 3 on all aspects. With cooler temperatures on Saturday, wet avalanche activity will decrease, but new wind slabs may have formed in the alpine.

If you head into the backcountry this weekend, please share any observations on thethe Mountain Information Network.

Snowpack Summary

Over 100 mm of rain has fallen in the past few days (except closer to 40 mm in Manning), creating a wet upper snowpack that will gradually refreeze.

Lower elevations will likely have crusty surfaces on Saturday, while upper elevations may hold up to 30 cm of wind-affected snow.

Older crust layers, now buried 100 to 200 cm deep, are no longer a concern, and the snowpack is generally strong and well bonded.

Weather Summary

Friday Night

Mostly cloudy. 40 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level drops from 1500 to 700 m.

Saturday

Mostly cloudy. 30 km/h west ridgetop wind. Treeline temperature -7 °C.

Sunday

Mostly cloudy. 5 to 10 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -7 °C.

Monday

Mostly sunny. 40 km/h west ridgetop wind. Treeline temperature -2 °C. Freezing level climbing to 1600 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avalanche activity is unlikely when a thick melt-freeze crust is present on the snow surface.
  • Dial back your terrain choices if you are seeing more than 20 cm of new snow.
  • Be especially cautious as you transition into wind-affected terrain.

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.