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Avalanche Forecast

Archived

Apr 3rd, 2022–Apr 4th, 2022

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

Regions

Kootenay Boundary.

Keep an eye on snow accumulation and be prepared to dial back your terrain selection throughout the day. New storm slabs will increase in size and sensitivity to triggering.

Confidence

Low - Uncertainty is due to the track & intensity of the incoming weather system.

Weather Forecast

Sunday night: Stormy with 5 to 10 cm of new snow expected. Moderate south winds and freezing levels falling to 1400 m.

MONDAY: Stormy with up to 30 cm of new snow expected. Moderate to strong southwest winds and freezing levels rising to 1500 m.

TUESDAY: Mostly cloudy with light flurries bringing around 5 cm of new snow. Light to moderate west wind and freezing level around 1500 m.

Wednesday: Sunny with no new snow expected. Light westerly wind and freezing levels rising to 1800 m.

Avalanche Summary

On Saturday ski cutting produced a few size one wind slab avalanches on east aspects at treeline. 

Snowpack Summary

New wind and storm slabs will likely form throughout the day on Monday. A crust exists on all aspects to around 2500 m. This crust will likely become moist at lower elevations as the freezing level rises.

At 40 to 70 cm below the snow surface a sun crust exists on solar aspects, and weak surface hoar crystals sit on shaded aspects from early March. Reports suggest this layer is bonding well. The mid and lower snowpack are generally strong and well settled.

Terrain and Travel

  • Watch for fresh storm slabs building throughout the day.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.

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.