Avalanche

Avalanche: American Fork

Zimmerman-Wall/ AIARE PRO 1Provo
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Avalanche

Slab Width
9 m
Weak Layer
Density Change
Trigger Type
Skier
Vertical Fall
12 m
Avalanche Type
Soft Slab
Slab Thickness
30 cm
Trigger Detail
Unintentionally Triggered
Start Zone Aspect
North
Avalanche Problem
New Snow
Start Zone Elevation
2987 m

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.