Wind slab Tilley
Quick reportaccounts · Apr 13, 2025 · Long Range Mountains
Weather
- Wind Speed
- windSpeedCalm
- Sky Condition
- clear
- Storm Start Date
- 2025-04-12
- Temperature Trend
- rising
- Precipitation Type
- none
Avalanche
- Run Length
- 25
- Slab Width
- 50
- Trigger Type
- skier
- Wind Exposure
- leeSlope
- Avalanche Size
- 1.5
- Slab Thickness
- 20
- Trigger Sub Type
- accidental
- Start Zone Aspect
- E
- Vegetation Cover
- openSlope
- Start Zone Incline
- 35
- Avalanche Character
- stormSlab, windSlab
- Crust Near Weak Layer
- 1
- Number Of Avalanches
- 1
- Runout Zone Elevation
- 2100
- Weak Layer Burial Date
- 2025-04-12
- Avalanche Observation
- 12hrsAgo
- Weak Layer Crystal Type
- stormSnow
- Start Zone Elevation Band
- tln
- Avalanche Occurrence Datetime
- 2025-04-13T18:00:00.000Z
Incident
- Group Size
- 5
- Terrain Trap
- slopeTransitionOrBench
- Group Activity
- skiing
- Number Involved
- 1
- Snow Depth Trigger Point
- variable
- Terrain Shape Trigger Point
- convex
- Number Partly Buried Able Breathing
- 1
Triggered size 1.5 wind slab on crust while going up and breaking trail on our way to English lake. Slab broke above me near the smallest part of the feature and propagated across entire feature. Went for a small ride and stayed mostly on top before tipping head first on the bench below. Partial burial to chest and no injuries. The crown was between 5cm to around 30cm at the thickest spot. Wind slab formed yesterday during the storm and was sitting on a hard crust. The next section was a lower angle bench above a terrain trap (gully, cliffs and trees) the bench itself was ok, but connected to a bigger bowl and we were concerned about remote triggering.