North Slopes of Chair Peak, D2
Slab failed on 4/7 interface
65 cm deep crown, some propagation, runout all the way to Snow Lake
Signs of Unstable Snow
Did you see shooting cracks?
Did you experience collapsing or whumpfing?
Route: Travel plan was to explore Wright Peak via Cache Couloir. Approach began at Snow Lake TH and we climbed up the Thumbtack on Chair. After digging multiple hand pits, we opted to ski the Cache Couloir after seeing graupel on top of the 4/7 interface and lots of wind affect on the North slopes of Chair Peak.
Snowpack: 8-12 inches of new, low density snow in past 24 hours on top of 4/7 interface
Weather: Vert few clouds, direct solar radiation starting at 0800. Calm winds. Clouds thickened to broken coverage around 1300
Crown Profile: Graupel at 4/7 interface, CT 20 Sudden Planer- Q1
Observed Avalanche Problem #1:
All south facing aspects had small loose wet activity