Observer Name
Zimmerman-Wall/ AIARE PRO 1
Observation Date
Friday, April 4, 2025
Avalanche Date
Friday, April 4, 2025
Region
Provo » American Fork
Location Name or Route
Sinner's Pass/Mary Ellen Gulch
Elevation
9,800'
Aspect
North
Slope Angle
Unknown
Trigger
Skier
Trigger: additional info
Unintentionally Triggered
Avalanche Type
Soft Slab
Avalanche Problem
New Snow
Weak Layer
Density Change
Depth
12"
Width
30'
Vertical
40'
Comments
Small convexity with sparse vegetation. Skiers 1 and 2 had already skied the adjacent more concave slope without any releases. Skier 3 entered the slope, then stopped as soon as slope fractured at feet and did not get pushed. Slab broke apart quickly and fanned out due to lessening of slope angle. This correlated with a nearby ECTP result in a snow profile and appeared to be at the same storm interface we had been tracking all week.
Coordinates
