Likely evidence of natural avalanche on Silver Peak from Feb 29th.

Location Name: 
Silver Peak
Region: 
Cabin Creek, Deep Creek, or Pole Creek Area
Date and time of avalanche (best estimate if unknown): 
Wed, 02/29/2012 - 12:00
Location Map: 
United States
39° 13' 13.386" N, 120° 14' 42.0648" W
See map: Google Maps
US


Red Flags: 
Recent avalanche activity
Recent loading by new snow, wind, or rain
Obvious avalanche path
Observation made by: Forecaster
Avalanche Observations
Avalanche Type: 
dry,slab,
Slope: 
45degrees
Trigger type: 
Natural
Crown Height: 
2 ft
Aspect: 
Northeast
Weak Layer: 
Old Snow
Terrain: 
Above Treeline
Elevation: 
8 200ft.
Bed Surface: 
Old Snow
More detailed information about the avalanche: 

95% certainty that this is the remains of a natural avalanche that occurred sometime on February 29th.

Photo 1: Likely crown remains.

Photo 2: Likely avalanche debris in gully below the crown.

Exact width and length of the avalanche are unknown. There appeared to be some crust covered rocks emerging from the new snow below the crown that may have been part of the bed surface.

Avalanche Photos: 
Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Gale Force
Precipitation: 
Snow
Air temperature trend: 
Static
Wind Direction: 
Southwest
Accumulation rate: 
Greater than 1 in. per hour
More detailed information about the weather: 

Wx obs listed above are from February 29th, the day the avalanche is suspected to have occurred.