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Avalanche Forecast

Archived

Mar 20th, 2022–Mar 21st, 2022

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

Regions

Vancouver Island.

Keep an eye on the weather throughout the day. Hazard will increase as freezing levels rise and storm snow accumulates. 

Confidence

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

Weather Forecast

Sunday night: stormy with 5 to 15 cm of snow expected with moderate to strong south winds. Freezing levels rising throughout the night to 1500 m. 

Monday: stormy with up to 20 cm of new snow expected at higher elevations and moderate southerly winds. Freezing levels rising to 2000 m.

Tuesday: stormy with up to 10mm of precipitation likely falling as rain at all elevations. Strong south winds. Freezing level around 2500 m.

Wednesday: clearing throughout the day. Possibility of some light flurries bringing trace amounts of new snow. Freezing level falling to 1000 m. Light westerly winds.

Avalanche Summary

On Saturday one size one skier triggered wind slab avalanche was reported. This avalanche took place on a north aspect at treeline.

Snowpack Summary

New storm and wind slabs will likely form throughout the day on Monday. As the freezing levels rise moist snow could be observed on all aspects and elevations. . 

Below treeline, snowpack depths are below threshold for avalanches in many areas.

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Be alert to conditions that change with elevation and wind exposure.
  • Watch for fresh storm slabs building throughout the day.
  • Back off slopes as the surface becomes moist or wet with rising temperatures.

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.