Avalanche on Round Top above Round Top Lake

Location Name: 
Round Top
Region: 
Carson Pass Area
Date and time of avalanche (best estimate if unknown): 
Wed, 03/06/2013 - 04:00
Location Map: 
United States
38° 39' 51.0516" N, 120° 0' 44.2692" W
See map: Google Maps
US


Red Flags: 
Recent avalanche activity
Recent loading by new snow, wind, or rain
Obvious avalanche path
Terrain Trap
Observation made by: Public
Avalanche Observations
Avalanche Type: 
dry,slab,
Slope: 
37degrees
Trigger type: 
Natural
Crown Height: 
1 ft
Aspect: 
Northeast
Weak Layer: 
Old Snow
Avalanche Width: 
1 000ft.
Terrain: 
Above Treeline
Elevation: 
9 800ft.
Bed Surface: 
Old Snow
Avalanche Length: 
400ft.
More detailed information about the avalanche: 

By Sunday when the photos and video were taken, some wind scouring had occurred on the bed surface and the crown and there were 3-4 inches of snow on top of slide in some areas. Based on this info the slide likely occured during the March 6th storm. The bed surface seemed to be the old snow surface. Width, length, and crown height are all estimated from the photos and the video.

Avalanche Photos: 
Avalanche observation video: 

Carson Pass Sisters Avalanche

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