Small avalanche below treeline on Jake's Pk

Location Name: 
Jake's Peak
Region: 
West Shore Area
Date and time of avalanche (best estimate if unknown): 
Thu, 02/17/2011 - 15:00
Location Map: 
United States
38° 58' 13.152" N, 120° 6' 53.6364" W
See map: Google Maps
US


Red Flags: 
Whumphing noises, shooting cracks, or collapsing
Recent loading by new snow, wind, or rain
Obvious avalanche path
Observation made by: Forecaster
Avalanche Observations
Avalanche Type: 
dry,slab,
Slope: 
40degrees
Trigger type: 
Other - explain below
Crown Height: 
Less than 1 ft
Aspect: 
North
Weak Layer: 
Storm Snow
Avalanche Width: 
50ft.
Terrain: 
Below Treeline
Elevation: 
8 300ft.
Bed Surface: 
Storm Snow
Avalanche Length: 
100ft.
More detailed information about the avalanche: 

Small avalanche on N aspect gully on Jake's Peak. It is unknown if the avalanche occurred yesterday in response to a human trigger or was a small natural avalanche yesterday evening. Widespread layer of rimed crystals producing cracking in the area consistent with the flank height and amount of debris down slope. Crown appeared to have completely filled in.

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