Quick report
- Slope Angle
- 39°
Avalanche
- Slab Width
- 27 m
- Weak Layer
- New Snow/Old Snow Interface
- Trigger Type
- Skier
- Avalanche Type
- Soft Slab
- Slab Thickness
- 36 cm
- Trigger Detail
- Remotely Triggered
- Start Zone Aspect
- Northeast
- Avalanche Problem
- Wind Slab
- Start Zone Elevation
- 2926 m
Traveling from Empire Pass to the head of Millcreek along the PC ridge today showed wind effect to be the primary avalanche problem in multiple areas. Overall rugged walking conditions. With a consistent 11-16" of new snow at ridgeline, battling terrain-driven and prevailing WNW winds have created soft but moderately-sensitive windslab that will take time to heal at the new/old interface.
Wind-affected snow was more prevalent on the southern half of the ridgeline but human triggers will be possible throughout it for the next days. Digging/walking produced one Sudden Planar (SP) result but mostly Resistant Planar (RP) failure ~12-15" down.
While walking I observed one natural and remotely-triggered at least 2 soft wind-slabs from the ridge; all on steeper, rocky features (Pic 1).
Many areas produced cracking on the new/old interface (Pic 3).
After this week's dense snow settling and weather warming, the persistent weak layer from mid-November is less reactive. However, the odds are low but stakes are really high, Areas like the PC Ridgeline have a lower HS and are still prime for triggering a large and hard slab. I was reminded of this as I had a pole-deep crack propagate at ski tip (Pic 2) from well back on the ridge. This wind-loading has the potential to tip the scale in areas that haven't yet run on this layer.