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Avalanche Forecast

Archived

Mar 15th, 2026–Mar 16th, 2026

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural and human triggered avalanches likely.
Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural and human triggered avalanches likely.

Regions

Sasquatch, Coquihalla, Harrison-Fraser, Manning, Skagit.

Expect the avalanche hazard to increase throughout the day. Watch for changing conditions as freezing levels rise.

Confidence

Moderate

  • We are uncertain about how the snowpack will react to the forecast weather.

Avalanche Summary

On Saturday, a large size 2.5–3 avalanche was reported on a southeast face above Nak Bowl, traveling through a terrain trap and continuing down the bowl below. A few small wind slabs and one small wet loose slide from afternoon solar warming were also observed.

Avalanche activity will increase with the forecasted weather.

If you are heading into the backcountry, please share any observations with the Mountain Information Network.

Snowpack Summary

Approximately 60 to 100 cm of snow has accumulated over the past week, burying a widespread crust at treeline and below. In alpine terrain, this crust is likely thin or absent. Periods of strong southwesterly wind have redistributed the new snow in exposed areas at higher elevations.

A crust with facets may exist 100 to 200 cm below the surface, primarily on northerly aspects at higher elevations. This layer appears unreactive but continues to be monitored.

The remaining snowpack appears strong and well-bonded.

Weather Summary

Sunday Night

Cloudy. 5 to 10 cm of snow. 60 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Monday

Cloudy. 5 to 15 mm of precipitation as snow or rain at treeline. 70 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1700 m.

Tuesday

Mostly cloudy. 10 to 25 mm of rain at treeline. 70 km/h southwest ridgetop wind. Treeline temperature 2 °C. Freezing level 2200 m.

Wednesday

Mostly cloudy. 35 to 65 mm of rain at treeline. 60 km/h southwest ridgetop wind. Treeline temperature 3 °C. Freezing level 2200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Be careful as you transition into wind-affected terrain.
  • Loose avalanches may start small, but they can grow and push you into dangerous terrain.
  • Keep in mind a buried crust offers an excellent bed surface for avalanches.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.