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Avalanche Forecast

Archived

Mar 28th, 2025–Mar 29th, 2025

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

Regions

Blue River, Clearwater, Premier, Clemina.

The snowpack is untrustworthy after going through dramatic weather fluctuations. Conservative low-angle routes are recommended.

Confidence

Low

Avalanche Summary

Limited reports indicate a natural avalanche cycle over the past few days, with avalanches up to size 2.5. This includes numerous wet loose avalanches and cornice failures, a few storm slabs in alpine terrain, and some persistent slab avalanches near Valemount.

While natural avalanche activity is expected to decrease this weekend, the snowpack remains unstable and untrustworthy.

Snowpack Summary

Recent convective snowfall has been highly variable, accumulating over a crust in most areas except shady aspects in the high alpine where soft or wind affected dry snow may be found.

The primary weak layer of concern is a surface hoar, facet, and crust layer from early March, buried 50 to 100 cm deep. While its distribution and sensitivity remain uncertain, it has been highly reactive in the neighbouring Monashee regions.

The lower snowpack is likely strong and bonded in most areas.

Weather Summary

Friday night

Cloudy with 5 to 10 cm of snow. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -3 °C.

Saturday

Mix of sun and cloud with scattered flurries bringing 2 to 8 cm. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1600 m.

Sunday

Sunny. 10 to 20 km/h southeast ridgetop wind. Treeline temperature 0 °C. Freezing level 2000 m.

Monday

A mix of sun and cloud. 10 to 20 km/h southeast ridgetop wind. Treeline temperature 0 °C. Freezing level 2000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • In times of uncertainty, conservative terrain choices are our best defense.
  • Stick to simple terrain or small features with limited consequence.
  • Dial back your terrain choices if you are seeing more than 20 cm of new snow.
  • Avoid travelling on slopes below cornices.

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.