Avalanche on Powderhouse bowl

Location Name: 
Powderhouse Bowl
Region: 
Luther Pass Area (including Job and Freel)
Date and time of avalanche (best estimate if unknown): 
Sat, 03/03/2018 - 09:00
Location Map: 
United States
38° 47' 1.2372" N, 119° 58' 16.0572" W
See map: Google Maps
US


Red Flags: 
Obvious avalanche path
Terrain Trap
Observation made by: Professional Observer
Avalanche Observations
Avalanche Type: 
Dry
Slope: 
35degrees
Trigger type: 
Natural
Crown Height: 
4 ft
Aspect: 
North
Weak Layer: 
New/old snow interface
Avalanche Width: 
150ft.
Terrain: 
Below Treeline
Elevation: 
9 000ft.
Bed Surface: 
Old Snow
Avalanche Length: 
400ft.
More detailed information about the avalanche: 

Based on amount of new snow on top of debris and crown, I estimate that this occurred naturally during the last part of the storm, perhaps Saturday morning. The largest parts of the crown were over 5 feet in height and around 4 feet for much of the distance. Interestingly, on the eastern part of the crown, cracks were visible that had propogated but the slope below had not slide. 

Avalanche Photos: 
Weather Observations
Air temperature: 
Precipitation: 
Air temperature trend: 
Wind Direction: 
Accumulation rate: 
More detailed information about the weather: