Apex Avalanches
Avalancheronberlie · Feb 9, 2020
Snowpack
- Depth
- 185
- Obs Type
- point
- Site Aspect
- NE
- Test Fracture
- sudden
- Site Elevation
- 2130
- Ski Penetration
- 30
- Test Initiation
- hard
- Foot Penetration
- 50
- Test Failure Depth
- 143
- Site Elevation Band
- tln
- Surface Conditions
- newSnow
- Test Failure Layer Crystal Types
- depthHoar
This profile was done directly above the 3 avalanches triggered by snowmobiles on Sat 08 Feb 2020 on the NE facing slopes south of Apex Proper below point 2130m (Ron’s Ridge). The avys were not in Powder 8 bowl as reported. CTM 18 RP down 15 cms CTH 23 SC down 143cms whole column failed on depth hoar. Avy start zones: Bowl features Scree bed surface in start zone. Convex start zone. See pics. Cross loaded Terrain trap (deep gully in run out) 150 cms new snow in 7 days High winds from NW for several days with a brief switch to S-SW winds on previous evening. Crown fracture 2m+
Avalanche
- Run Length
- 200
- Slab Width
- 50
- Trigger Type
- snowmobile
- Wind Exposure
- crossLoadedSlope
- Avalanche Size
- 2.5
- Slab Thickness
- 200
- Trigger Sub Type
- accidental
- Start Zone Aspect
- NE
- Vegetation Cover
- sparseTrees
- Start Zone Incline
- 40
- Avalanche Character
- deepPersistentSlab
- Crust Near Weak Layer
- 1
- Number Of Avalanches
- 2-5
- Start Zone Elevation
- 2100
- Runout Zone Elevation
- 1950
- Weak Layer Crystal Type
- depthHoar
- Start Zone Elevation Band
- btl
- Avalanche Occurrence Datetime
- 2020-02-08T09:40:00
Involvement with 1 sled. Overhead hazard Terrain trap