Avalanche on Donner Peak

Location Name: 
Donner Peak
Region: 
Donner Summit Area
Date and time of avalanche (best estimate if unknown): 
Tue, 03/15/2016 - 13:00
Location Map: 
United States
39° 18' 49.3236" N, 120° 18' 49.2588" W
See map: Google Maps
US


Red Flags: 
Rapid warming
Observation made by: Guide at Tahoe Mountain School
Avalanche Observations
Avalanche Type: 
Slab
Trigger type: 
Unknown
Aspect: 
Northeast
Terrain: 
Above Treeline
Elevation: 
7 500ft.
More detailed information about the avalanche: 

I spotted this slide driving eastbound on I-80, the picture was taken from the vista point.  It appears to be a natural slide, I could not spot any ski tracks near it.  Sorry for the poor picture quality, the crown is on a roll over just above the trestles there are also a couple smaller slides lookers right in the photo as well.  I also saw a small D1 slide coming out of the heart and a D2 slide on trestle peak about the same elevation on the lookers left side of the peak.  I skied an east aspect on signal peak earlier in the day and only observed some minor roller ball/pinwheel activity in that zone.

Avalanche Photos: 
Weather Observations
Cloud Cover: 
Clear
Air temperature: 
Above Freezing
Precipitation: 
None
Air temperature trend: 
Warming