Old Avalanche Showing Itself

Location Name: 
Above PCT motorized crossing
Region: 
BWRA
Date and time of avalanche (best estimate if unknown): 
Sat, 12/30/2017 - 11:21
Location Map: 


Red Flags: 
Obvious avalanche path

Observation made by: Avalanche Specialist
Avalanche Observations
Avalanche Type: 
Slab
Slope: 
39degrees
Trigger type: 
Natural
Crown Height: 
Less than 1 ft
Aspect: 
East
Weak Layer: 
Old Snow
Avalanche Width: 
80ft.
Terrain: 
Above Treeline
Elevation: 
10 680ft.
Bed Surface: 
Old Snow
Avalanche Length: 
120ft.
Did the avalanche hit a building, vehicle, or structure?: 
No
More detailed information about the avalanche: 

These old avalanche remnants were difficult to see upon initial traveling to this area by splitboard. After yesterdays investigations it looks to have been a wind slab that pulled out on the Thanksgiving crust we are seeing in isolated areas. It left little or no debris & appears to have filled in from the bottom up with wind deposited snow erratically. There is evidence of dirt, small rocks & pine litter being blown into this terrain trap, eluding to the strong winds see in our last storm.

Avalanche Photos: 
Weather Observations
Cloud Cover: 
Clear
Air temperature: 
Above Freezing
Air temperature trend: 
Cooling
More detailed information about the weather: 

Hot, Dry & Pathetic