Crown on north side Castle Peak

Location Name: 
Castle Peak - north side
Region: 
Donner Summit Area
Date and time of avalanche (best estimate if unknown): 
Wed, 01/04/2017 - 22:00
Location Map: 
United States
39° 21' 46.8144" N, 120° 20' 34.854" W
See map: Google Maps
US


Red Flags: 
Recent loading by new snow, wind, or rain
Obvious avalanche path
Terrain Trap
Observation made by: Public
Avalanche Observations
Avalanche Type: 
Slab
Slope: 
37degrees
Trigger type: 
Natural
Crown Height: 
4 ft
Aspect: 
North
Avalanche Width: 
150ft.
Elevation: 
8 650ft.
Bed Surface: 
Unknown
Avalanche Length: 
750ft.
Number of similar avalanches: 
1
Number of people caught: 
0
More detailed information about the avalanche: 

Observed afternoon on 1/6/17. Presumably, this triggered naturally during the rapid loading and wind of 1/4/17. Looks like wind slab went, taking (at least) storm slab the full length of slope. Did not ascertain if it stepped down to deep slap. Didn't measure slope, but probably in the 35-40 range. 

Snowpit or crown profile photo or graph: 
Weather Observations
Air temperature: 
Precipitation: 
Air temperature trend: 
Wind Direction: 
Accumulation rate: 
More detailed information about the weather: