Avalanche on ralston

Location Name: 
Ralston - North face
Region: 
Desolation Wilderness Area (including Emerald Bay)
Date and time of avalanche (best estimate if unknown): 
Mon, 12/26/2016 - 12:30
Location Map: 
United States
38° 49' 59.7216" N, 120° 6' 5.742" W
See map: Google Maps
US


Red Flags: 
Recent loading by new snow, wind, or rain
Observation made by: Public
Avalanche Observations
Avalanche Type: 
Slab
Slope: 
35degrees
Trigger type: 
Skier
Crown Height: 
1 ft
Aspect: 
North
Weak Layer: 
Storm Snow
Avalanche Width: 
200ft.
Terrain: 
Above Treeline
Elevation: 
9 100ft.
Bed Surface: 
Other - explain below
Avalanche Length: 
200ft.
More detailed information about the avalanche: 

Small wind slab broke at the top of the mountain and a larger wind/storm slab broke when the slope mellowed out. Avalanche ran slow and stopped before the very large cliffs/terrain trap below.

Avalanche Photos: 
Weather Observations
Blowing Snow: 
No
Cloud Cover: 
Clear
Air temperature: 
Below Freezing
Wind Speed: 
Calm
Precipitation: 
None
Air temperature trend: 
Warming
Accumulation rate: 
None