Plewman avalanche
Observed Dec 29, 2021, 12:00 p.m. PST · kootenay-boundary
This report was submitted with an older form.
Avalanche report
- Comment
- Large slab visible from Highway 3B on N side of Mt Plewman, debris running full path to edge of forest with some smaller broken trees noted. Wind loaded slope including visible cross loading, suspect trigger was wind loading as no evidence of ski tracks into slab but debris ran across recent uptracks. Suspect approx 24hrs old but could be 48 or more. Slab depth estimate 50cm to 120cm, suspect failure was on Dec 4 atmospheric river crust.
- Run length
- 600
- Slab width
- 200
- Trigger type
- Natural
- Wind exposure
- Cross loaded slope
- Avalanche size
- 3
- Slab thickness
- 100
- Start zone aspect
- NE
- Start zone incline
- 40
- Avalanche character
- Persistent slab
- Number of avalanches
- 1
- Start zone elevation
- 2100
- Runout zone elevation
- 1850
- Avalanche observation
- 24to48hrsAgo
- Start zone elevation band
- Tln
- Avalanche occurrence datetime
- 2021-12-28T16:00:00