- Submitted by
- D.McLachlan
- Observations date
- Sunday, December 3, 2017 at 21:00
- Location
- 52.205670° N 117.063780° W
- Reporting on
- Snow conditions
%2F-117.06378%2C52.20567%2C8%2C0%2C0%2F1026x200%3Faccess_token%3Dpk.eyJ1IjoiYXZhbGFuY2hlY2FuYWRhIiwiYSI6ImNqd2dvZmUxdzE4ZWg0M2tkaXpuNG95aTQifQ.pBLM87fE3sIxRJqJT7Bf7g&w=1200&q=75 "alpine avalanche activity")
Quick
Avalanche
Snowpack
Weather
Incident
Information
- Avalanche date/time
- Sunday, December 3, 2017 at 14:00
- Estimated occurrence time of avalanche
- From 12 to 24 hours ago
- Number of avalanches in this report
- 1
- The size of avalanche
- 3.5
- Slab thickness
- 100cm
- Slab width
- 600m
- Run length
- 1,600m
- Avalanche Character
- Deep persistent slab
- Trigger type
- Natural
- Start zone aspect
- S
- SW
- W
- Start zone elevation band
- Alpine
- Start zone elevation
- 2,600m
- Start zone incline
- 40°
- Runout zone elevation
- 1,900m
- Wind exposure
- Cross-loaded slope
- Vegetation cover
- Open slope
Comments
Observed evidence of large natural avalanche on alpine slopes across the highway from Parkers Ridge at location shown on map (above Nigel Creek). Involved multiple start zones and single narrow runout zone with accumulation of debris to BTL. Appeared to have failed to near ground, possibly on Halloween crust and/or basal facets. Start zone was extreme alpine terrain, inclination is estimated. Slab thickness unknown and is estimated.