R2 triggered on WSW facing ridgeline low inside Rose Knob Peak's main bowl

Location Name: 
Main bowl of Rose Knob Peak
Region: 
East Shore Area
Date and time of avalanche (best estimate if unknown): 
Sun, 02/12/2017 - 11:30
Location Map: 
United States
39° 17' 8.2284" N, 119° 57' 5.5476" W
See map: Google Maps
US


Red Flags: 
Recent avalanche activity
Recent loading by new snow, wind, or rain
Rapid warming
Observation made by: Public
Avalanche Observations
Avalanche Type: 
Wet
Slab
Slope: 
30degrees
Trigger type: 
Snowboarder
Crown Height: 
3 ft
Aspect: 
West
Weak Layer: 
Storm Snow
Avalanche Width: 
30ft.
Terrain: 
Near Treeline
Elevation: 
8 200ft.
Bed Surface: 
Old Snow
Avalanche Length: 
500ft.
Number of people caught: 
1
Number of partial burials: 
0
Number of full burials: 
0
More detailed information about the avalanche: 

The temperature had been rising along with the direct sunlight, so its snow was getting warm by the time this trigger occurred. 1 in front of me (the trigger man), and 3 behind me. This was our only avalanche event of the day, and despite seeing many recent pinpoint releases this was our only encounter with a slab release.

Avalanche observation video: 

Low angle slab avalanche with self rescue, 02/12/2017, below Rose Knob Peak, NV

Weather Observations
Blowing Snow: 
No
Cloud Cover: 
Clear
Air temperature: 
Above Freezing
Wind Speed: 
Light
Precipitation: 
None
Air temperature trend: 
Warming
Wind Direction: 
East
Accumulation rate: 
More detailed information about the weather: 

Bright sun, and above freezing temepratures.