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Avalanche Forecast

Archived

Mar 15th, 2025–Mar 16th, 2025

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

Regions

Coquihalla, Manning.

With continued snowfalls, human-triggered slab avalanches will remain a concern, especially on wind-loaded features.

Confidence

Moderate

Avalanche Summary

On Friday, a cornice fall triggered a small wind slab avalanche (size 1.5) on a cross-loaded slope near Thar Peak. Several loose wet avalanches were observed on steep southerly slopes in the Coquihalla.

On Thursday, a skier triggered a size 1 avalanche on a northeast aspect at treeline in the Coquihalla. Read full MIN here.

Snowpack Summary

Over the weekend, 15 to 25 cm of new snow will add to 65 cm of recent storm snow. This sits above a crust on all aspects except on high, north-facing alpine terrain. Moderate to strong southwest winds have redistributed storm snow into deeper pockets on lee slopes at ridgeline, forming wind slabs.

A layer of facets and surface hoar that formed in February has been found 90 to 150 cm down, and a layer of facets and surface hoar from late January can be found down to 130 to 190 cm. No recent notable test results have been seen on these layers.

Weather Summary

Saturday Night

Cloudy with 5 to 10 cm of new snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -5 C. Freezing level 1000 m.

Sunday

Cloudy with 3 to 5 cm of new snow. 15 to 30 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 1000 m.

Monday

Cloudy with 10 to 15 cm of new snow. 30 to 40 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level rising to 1200 m.

Tuesday

Cloudy with up to 5 cm of new snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level rising to 1000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Approach lee and cross-loaded slopes with caution.
  • Back off if you encounter whumpfing, hollow sounds, or shooting cracks.
  • Be aware of the potential for loose avalanches in steep terrain where snow hasn't formed a slab.

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.