Deception Pass / Fossil Mountain
Observed Mar 9, 2024, 8:00 p.m. PST · Central Rockies
This report was submitted with an older form.
Avalanche report
- Comment
- Skier remote triggered slide. Group of 5 skied from the base of the climb up fossil mountain, just east of perception pass. Avalanche was triggered remotely from one of the skiers. The slide was very slow due to the angle of the slope being so low. Our group did not notice the slide until we got down to the lake and another group of skiers notified us. Thanks to the other group for getting the photos for us! Stay safe!
- Run length
- 44
- Slab width
- 20
- Trigger type
- Skier
- Wind exposure
- Windward slope
- Avalanche size
- 1.5
- Slab thickness
- 20
- Trigger sub type
- Accidental
- Start zone aspect
- S
- Trigger distance
- 7
- Vegetation cover
- Open slope
- Start zone incline
- 30
- Avalanche character
- Persistent slab, Wind slab
- Crust near weak layer
- Yes
- Number of avalanches
- 1
- Start zone elevation
- 2515
- Runout zone elevation
- 0
- Avalanche observation
- 12hrsAgo
- Start zone elevation band
- Alp
- Avalanche occurrence datetime
- 2024-03-09T20:30:00.000Z
Snowpack report
- Depth
- 50
- Comment
- On the approach up to fossil mountain we heard a whumpf. Decided it would be best to dig a pit and turn around. 2 isolated column tests proved our decision correct. We observed CTE4 and CTE6 failing on the persistent layer.
- Obs type
- Point
- Site aspect
- S
- Test fracture
- Sudden
- Site elevation
- 2550
- Ski penetration
- 0
- Test initiation
- Easy
- Foot penetration
- 45
- Sled penetration
- 0
- Cracking observed
- No
- Test failure depth
- 19
- Site elevation band
- Alp
- Surface conditions
- Crust
- Whumpfing observed
- Yes