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Avalanche Forecast

Archived

Dec 3rd, 2021–Dec 4th, 2021

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

Regions

North Columbia.

Wind slab hazard still remains in the alpine and upper treeline. Carefully assess the wind slab hazard as you gain elevation in search of better riding conditions.

Confidence

High -

Weather Forecast

Friday night: low of -15 at 1500m with light alpine winds. No precipitation expected.

Saturday: high temperature at 1500m -10. light to moderate winds from the Northwest. up to 15cm of new snow with the higher amounts expected for the Southwest part of the region.

Sunday: high of -10 at 1500m, moderate winds from the Northwest in the alpine. Some light flurries with little accumulation.

Monday: No new snow expected. High of -13 at 1500m. Light to Moderate Northwest winds in the alpine.

Avalanche Summary

On Wednesday the region saw a widespread natural avalanche cycle to size 3.5 on all aspects with some running full path. Wet slab avalanches were observed in the below treeline on all aspects up too size 2.5. Hard frozen debris will likely be found in the runout of most avalanche paths.

Snowpack Summary

Recent strong winds have formed wind slab in all exposed terrain in Alpine and upper treeline. A new crust has formed below 2000m with moist snow underneath.

The average snowpack depth at treeline is 250cm.

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.