Evening Ridge
Observed Dec 27, 2021, 3:00 p.m. PST · kootenay-boundary
This report was submitted with an older form.
Quick report
- Comment
- Day two out with an AST - 1 course.
- Weather
- Cloudy, Cold
- Ride type
- Mellow slopes
- Stayed away
- Convex slopes, Alpine slopes, Steep slopes
- Riding quality
- Good
- Snow conditions
- Deep powder
- Avalanche conditions
- Avalanche condition snow, Avalanche condition slab
Snowpack report
- Depth
- 158
- Comment
- Repeated CTH 22, 26 (RP) down 80cm failing 2cm above zipper crust (.5mm)
- Obs type
- Point
- Site aspect
- SW
- Test fracture
- Resistant
- Site elevation
- 1519
- Ski penetration
- 50
- Test initiation
- Hard
- Foot penetration
- 80
- Cracking observed
- No
- Test failure depth
- 80
- Site elevation band
- Btl
- Surface conditions
- New snow
- Whumpfing observed
- No
- Test failure layer crystal types
- Facets
Weather report
- Avg temp
- -15
- Min temp
- -3
- Wind speed
- Wind speed calm
- Blowing snow
- None
- Sky condition
- Broken clouds
- New snow24hours
- 25
- Temperature trend
- Steady
- Precipitation type
- None
Incident report
- Group size
- 4
- Description
- Near end of day at approx. 15:30 lead instructor noticed a new crown off 1st Peak Evening Ridge. After observing as best we could, two skiers were spotted travelling back upslope through debris. Reported to WH2O patrol who initiated a response. Crown was approx. 200m wide, 60-180cm deep , and ran for roughly 400m. Triggered in a steep, shallow, wind affected area at ridgetop likely failing on Dec 04 MFcr which is now breaking down with facets present throughout.
- Terrain trap
- Gully depression, Trees
- Group activity
- Skiing
- Snow depth trigger point
- Shallow
- Terrain shape trigger point
- Convex