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Avalanche Forecast

Archived

Mar 28th, 2026–Mar 29th, 2026

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
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, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Coquihalla, Harrison-Fraser, Manning, Skagit.

Up to 40 cm of snow overlies a thick hard crust and any solar input increases the likelihood of an avalanche occurring.

Seek simple terrain and avoid steep and wind loaded leeward slopes.

Confidence

Moderate

  • We are uncertain about how the timing or intensity of solar radiation will affect the snowpack.

Avalanche Summary

On Friday a very large slab avalanche was rider triggered in the 10 km riding area near the Coquhalla summit. This avalanche was on a leeward aspect, that was heavily wind loaded and likely failed on a melt freeze crust formed earlier in March.

If you are heading into the backcountry, consider sharing your observations and posting a MIN.

Snowpack Summary

30-50 cm of recent snow is settling above a widespread thick. hard and smooth crust that exists everywhere except the highest alpine terrain. Expect this snow to rapidly become moist and unconsolidated when the sun comes out.

Extreme southwest wind on Tuesday gradually eased to strong and then moderate for Thursday, redistributing the storm snow into leeward terrain, expect slab depths to be deeper, exceeding 2 meters in some terrain features.

Older crust layers, now buried 150 to 250 cm deep, are no longer a concern, and the lower snowpack is generally strong and bonded.

Weather Summary

Saturday Night
Mostly cloudy. 1 to 2 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -7 °C.

Sunday
Mostly cloudy. 1 to 5 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -9 °C.

Monday
Mix of sun and clouds. 1 to 5 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -9 °C.

Tuesday
Mix of sun and clouds. 30 km/h southwest ridgetop wind. Treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Closely monitor how the new snow is bonding to the crust.
  • Be alert to conditions that change with elevation, aspect, and exposure to wind.

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.