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Avalanche Forecast

Archived

Apr 4th, 2022–Apr 5th, 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 possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Kootenay Boundary.

Continue to make conservative terrain choices. The storm snow likely hasn't bonded to the underlying crust.

Confidence

Moderate - The snowpack structure is generally well understood.

Weather Forecast

Monday night: Flurries bringing up to 5 cm of new snow with moderate west winds. Low of -3 at 1500 m.

TUESDAY: Mostly cloudy with light flurries bringing up to 5 cm of new snow. 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.

Thursday: Sunny with no new snow expected. Light to moderate wouthwest winds and freezing levels rising to 2300 m.

Avalanche Summary

Early reports on Monday indicate small storm slabs were reactive to ski cuts. Several size one natural cornice falls were also reported.

Snowpack Summary

New wind and storm slabs have formed throughout the day on Monday. Below this new snow a crust exists on all aspects and elevations. This crust will likely be found near the surface at lower elevations and become moist as the freezing level rises.

Multiple crusts exist in the upper snowpack. The mid and lower snowpack are well settled.

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Closely monitor how the new snow is bonding to the crust.

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.