Small, shallow wind slab avalanche

Location Name: 
Sun Bowl avalanche
Region: 
Mt. Shasta
Date and time of avalanche (best estimate if unknown): 
Thu, 02/23/2017 - 4:00pm
Location Map: 
United States
41° 22' 11.5644" N, 122° 12' 55.0872" W
US


Red Flags: 
Recent avalanche activity

Observation made by: Forecaster
Avalanche Observations
Avalanche Type: 
Slab
Slope: 
35degrees
Trigger type: 
Unknown
Crown Height: 
Less than 1 ft
Aspect: 
Southeast
Weak Layer: 
Unknown
Avalanche Width: 
100ft.
Terrain: 
Above Treeline
Elevation: 
8 700ft.
Bed Surface: 
Unknown
Avalanche Length: 
300ft.
Number of people caught: 
0
Number of partial burials: 
0
Number of full burials: 
0
More detailed information about the avalanche: 

Not much is known about this avalanche. It was not there when I started my day at about 11am. It was there when I was leaving Bunny Flat at about 1600. Photo taken from the parking lot. Looked like a shallow, small wind slab. Trigger is unknown.

Avalanche Photos: 
Weather Observations
Blowing Snow: 
No
Cloud Cover: 
25% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Calm
Precipitation: 
None
Air temperature trend: 
Static
Wind Direction: 
West
Accumulation rate: 
None
More detailed information about the weather: 

Sun, clouds, light showers... very little wind.