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Skier triggered slab avalanche

Submitted by
Dom Baker
Observations date
Thursday, April 20, 2023 at 18:00
Location
49.434560° N 117.119910° W
Reporting on
  • Snow conditions
Map for Mountain Information Network report: Skier triggered slab avalanche

Snow conditions

Riding quality was:
Good
Snow conditions were:
  • Heavy
  • Powder
We rode:
  • Alpine slopes
  • Convex slopes
  • Mellow slopes
  • Steep slopes
  • Sunny slopes

Information

The day was:
  • Cloudy
  • Warm
Avalanche conditions
  • Slab avalanches today or yesterday.

Comments

Sz 2.5 Skier triggered slab avalanche on the E aspect of Ymir peak, initiated from the approach to "the bench". We did not see it occur, but suspect this April 20 am based on talking with other skiers in the area. Wind deposited new snow failed on small facets on old sun crust. Crowns average 40-50cm, 10-30cm at trigger point. 60+ m wide in upper start zone, 100+ m wide below the rollover.

Sa sz 1.5 on NW aspect of Ymir, above Kubas chute entrance. Occured April 19, apparently no involvement. (Second photo)

Slab avalanche, crowns average 40-50cm, 10-30cm at trigger point. 60+ m wide in upper start zone, 100+ m wide below the rollover. New snow failed on small facets on old sun crust. E aspect
NW aspect sz 1.5 soft slab Sa, apparently no involvement.