Cornice detachment on Sibbald
Observed Mar 30, 2026, 10:00 a.m. PDT · Purcells
This report was submitted with an older form.
Avalanche report
- Comment
- We witnessed many recent cornice drops on our way to the summit of Sibbald, including one very large cornice detachment on the NW ridge. Lots of faceted snow at ridge top and large cornices on lee features that seem to be rotting with the persistent cold temps. Lots of snow on the glaciers for anyone traversing through, 3-4m+ on Sibbald and Battlement.
- Slab width
- 25
- Trigger type
- Natural
- Wind exposure
- Lee slope
- Avalanche size
- 2
- Slab thickness
- 200
- Start zone aspect
- NE
- Start zone incline
- 35
- Avalanche character
- Cornice only
- Crust near weak layer
- Yes
- Number of avalanches
- 2-5
- Start zone elevation
- 2550
- Avalanche observation
- 24to48hrsAgo
- Weak layer crystal type
- Facets
- Start zone elevation band
- Alp