Cornice detachment on Sibbald
Quick reportjessemassumi · Mar 30, 2026 · West Purcell
Avalanche
- Slab Width
- 25
- Trigger Type
- natural
- Wind Exposure
- leeSlope
- Avalanche Size
- 2
- Slab Thickness
- 200
- Start Zone Aspect
- NE
- Start Zone Incline
- 35
- Avalanche Character
- corniceOnly
- Crust Near Weak Layer
- 1
- Number Of Avalanches
- 2-5
- Start Zone Elevation
- 2550
- Avalanche Observation
- 24to48hrsAgo
- Weak Layer Crystal Type
- facets
- Start Zone Elevation Band
- alp
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.