D3 Slab-North Side of Anderson Peak

Location Name: 
Anderson Peak
Region: 
Donner Summit Area
Date and time of avalanche (best estimate if unknown): 
Fri, 02/25/2011 - 20:33
Location Map: 
United States
39° 15' 33.1344" N, 120° 17' 50.424" W
See map: Google Maps
US


Red Flags: 
Recent loading by new snow, wind, or rain
Obvious avalanche path
Observation made by: Public
Avalanche Observations
Avalanche Type: 
slab,
Slope: 
35degrees
Trigger type: 
Natural
Crown Height: 
5 ft
Aspect: 
North
Weak Layer: 
Old Snow
Avalanche Width: 
400ft.
Terrain: 
Above Treeline
Elevation: 
8 600ft.
Bed Surface: 
Old Snow
Avalanche Length: 
400ft.
More detailed information about the avalanche: 

This was the veiw of Anderson Peak from Negro Canyon this afternoon (02/26/2011). A very impressive new storm slide could be seen in the distance. Note that the flanks of the slide reach from wall to wall on the face. Also, note that the north-west slope (right of the obvious crown) apears in the photo to have also slid (?). Our vantage was too far away to give any usefull mesurments or estimates of size. Given the clean crown line, and slightly filled in bed surface, I would guess that this occurred yesterday evining as the storm was winding down.

Avalanche Photos: 
Weather Observations
Air temperature: 
Precipitation: 
Air temperature trend: 
Wind Direction: 
Accumulation rate: 
More detailed information about the weather: