Large natural avalanche at the head of Pole Creek

Location Name: 
Sierra Crest at the top of Pole Creek
Region: 
Cabin Creek, Deep Creek, or Pole Creek Area
Date and time of avalanche (best estimate if unknown): 
Tue, 12/25/2012 - 00:00
Location Map: 
United States
39° 13' 34.8168" N, 120° 15' 56.592" 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,
Trigger type: 
Natural
Crown Height: 
5 ft
Aspect: 
Northeast
Weak Layer: 
Old Snow
Avalanche Width: 
400ft.
Terrain: 
Above Treeline
Elevation: 
8 400ft.
Bed Surface: 
Old Snow
Avalanche Length: 
700ft.
More detailed information about the avalanche: 

This slide was viewed from the air and from Silver Peak. It looks to have started on climbers right at the base of the cliff and then stepped down to the old facet layers. It likely occurred on Dec. 25th or 26th.

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