Large cornice break

Location Name: 
South of Frog Lake Cliff
Region: 
Donner Summit Area
Date and time of avalanche (best estimate if unknown): 
Tue, 03/14/2017 - 10:15
Location Map: 
United States
39° 21' 39.4848" N, 120° 19' 56.6364" W
See map: Google Maps
US


Red Flags: 
Recent avalanche activity
Rapid warming
Observation made by: Educator at Donner Summit Avalanche Seminars
Avalanche Observations
Slope: 
45degrees
Trigger type: 
Natural
Aspect: 
East
Weak Layer: 
Other
Terrain: 
Above Treeline
Elevation: 
8 400ft.
Bed Surface: 
Other - explain below
Number of full burials: 
0
More detailed information about the avalanche: 

One of the larger cornice breaks I've seen during this warm spell.  May have broken on March 11.  That's Mac Calvert surveying the chaos.

Avalanche Photos: 
Weather Observations
Blowing Snow: 
No
Cloud Cover: 
25% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Light
Precipitation: 
Air temperature trend: 
Warming
Wind Direction: 
Southwest
Accumulation rate: 
More detailed information about the weather: