AST-1 course at Seymour to Mystery Peak
Quick reportsrhtschr · Mar 8, 2025 · North Shore
Quick report
- Weather
- wet, cloudy, stormy, foggy
- Stayed Away
- convexSlopes, steepSlopes, alpineSlopes
- Riding Quality
- terrible
- Snow Conditions
- wet, heavy
- Avalanche Conditions
- avalancheConditionTemp, avalancheConditionSound, avalancheConditionSlab, avalancheConditionSnow
Ast1 course climbing Mt. Seymour to Mystery peak. We observed whumpfing sounds, shooting cracks everywhere and intentionally triggered multiple small avalanches. Observed one small natural avalanche. Inverted snowpack with ~30cm fresh snow over 5-10cm facet weak layer. Compression test on 30x30cm colum: top layer collapsed after 2-3 tabs, clear cut.
Snowpack
- Obs Type
- summary
- Site Aspect
- S, SW
- Test Fracture
- sudden
- Ski Penetration
- 15
- Test Initiation
- veryEasy
- Cracking Observed
- 1
- Test Failure Depth
- 30
- Site Elevation Band
- btl
- Surface Conditions
- newSnow
- Whumpfing Observed
- 1
- Test Failure Layer Crystal Types
- facets
We observed whumpfing sounds, shooting cracks everywhere and intentionally triggered multiple small avalanches. Observed one small natural avalanche. Inverted snowpack with ~30cm fresh snow wet over 5-10cm facet weak layer from same storm snow before temperature rose. Compression test on 30x30cm colum: top layer collapsed after 2-3 tabs with clear cut.
Avalanche
- Run Length
- 1
- Slab Width
- 2
- Trigger Type
- skier
- Wind Exposure
- noWindExposure
- Avalanche Size
- 1
- Slab Thickness
- 20
- Trigger Sub Type
- intentional
- Start Zone Aspect
- S, SW
- Trigger Distance
- 2
- Start Zone Incline
- 30
- Avalanche Character
- stormSlab, wetSlab
- Number Of Avalanches
- 2-5
- Start Zone Elevation
- 1100
- Avalanche Observation
- 12hrsAgo
- Weak Layer Crystal Type
- stormSnow
- Start Zone Elevation Band
- btl
- Avalanche Occurrence Datetime
- 2025-03-08T18:00:00.000Z
We easily triggered small storm slab avelances in mellow terrain at the side of the skin tracks including remote trigger of 2m. A (very) small natural storm slab avalanche (4x4 foot) was visible between resort run and skin tracks.