- Submitted by
- bryanmitchell.07
- Observations date
- Saturday, December 26, 2020 at 19:59
- Location
- 54.738225° N 127.466364° W
- Reporting on
- Snow conditions
/-127.46636368905504,54.73822453307818,8,0,0/1026x200?access_token=pk.eyJ1IjoiYXZhbGFuY2hlY2FuYWRhIiwiYSI6ImNqd2dvZmUxdzE4ZWg0M2tkaXpuNG95aTQifQ.pBLM87fE3sIxRJqJT7Bf7g "KM 13")
Quick
Avalanche
Snowpack
Weather
Incident
Information
- Avalanche date/time
- Thursday, December 24, 2020 at 23:59
- Estimated occurrence time of avalanche
- From 12 to 24 hours ago
- Number of avalanches in this report
- 2 to 5
- The size of avalanche
- 2.5
- Slab thickness
- 30cm
- Slab width
- 45m
- Run length
- 250m
- Avalanche Character
- Storm slab
- Trigger type
- Natural
- Start zone aspect
- N
- NE
- Start zone elevation band
- Alpine
- Start zone elevation
- 1,570m
- Start zone incline
- 40°
- Runout zone elevation
- 1,340m
- Wind exposure
- Lee slope
Comments
Approximately 5 avalanches observed that likely failed on the night of of the 23rd or so (crowns filling in and new snow sitting on debris)
Many of the slides were windslabs failing just below ridge crest, however the largest looks like a wind slab failed and caused propagation on the December 6th rain crust.
The larger 2.5 (maybe 3?) ran to the middle of its runout.
Alpine and exposed tree line were heavily cross loaded with wind from the S, SW. Cornice stomping on cross loaded gully features yielded some shooting cracks and a few failures although isolated and propagation of 4m max with a lot of effort.
