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Avalanche Forecast

Archived

Mar 14th, 2025–Mar 15th, 2025

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

Regions

Coquihalla, Manning.

Stick to conservative terrain. Fresh, reactive slabs are expected to form throughout the day.

Winter isn't over yet. Check out the new forecaster blog here.

Confidence

Moderate

Avalanche Summary

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

Observations have been limited throughout this week's storms. Rider-triggered storm slabs remain likely on Saturday as new snow and wind form fresh, reactive slabs.

Snowpack Summary

5 to 15 cm of new snow on Saturday 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 which formed in February have been found 80 to 140 cm down, and a layer of facets and surface hoar from late January can be found down to 120 to 180 cm. No recent notable test results have been seen on these layers.

Weather Summary

Friday Night

Increasing cloud cover. 5 to 20 km/h southeast ridgetop wind. Treeline temperature -5 °C. Freezing level 700 m.

Saturday

Cloudy with 5 to 15 cm of new snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -5 C. Freezing level 1100 m.

Sunday

A mix of sun and cloud with isolated flurries. 15 to 30 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 1100 m.

Monday

Cloudy with up to 5 to 15 cm of new snow. 20 to 50 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level rising to 1200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Avoid lee and cross-loaded slopes in the alpine.
  • Back off if you encounter whumpfing, hollow sounds, or shooting cracks.

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.