Observations from Andesite Ridge

Location Name: 
Andesite Ridge
Region: 
Donner Summit Area
Date and time of observation: 
Sun, 01/10/2016 - 11:00
Location Map: 
United States
39° 20' 59.9604" N, 120° 21' 45.3816" W
See map: Google Maps
US


Red Flags: 
Terrain Trap
Observation made by: Professional Observer
Snowpit Observations
More detailed information about the snowpack: 

Video 1 is of a Compression test that yielded a CT 11 Sudden Collapse results on the surface hoar layer buried on Jan. 5th and now about 40cms deep in this location. 

Video 2 is of a nonstandard extra long Extended Column Test (ECT). After having propogation on the standard 90cm wide ECT we created a 200cm wide ECT and shown in the video which also had propogation. 

Other tests in this area were not quite as reactive. 

Photo 1: Light east winds in afternoon were lightly scouring open ridge top areas in the afternoon.

Snowpack photos: 
Snowpit videos (tests, etc): 

Andesite Ridge Compression Test

ECTP (nonstandard) on Andesite Ridge

Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
25% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Light
Precipitation: 
Air temperature trend: 
Static
Wind Direction: 
Northeast
Accumulation rate: 
More detailed information about the weather: