Observations from Donner Summit

Location Name: 
Mt. Judah
Region: 
Donner Summit Area
Date and time of observation: 
Mon, 12/06/2010 - 14:00
Location Map: 
United States
39° 18' 16.524" N, 120° 19' 2.676" W
See map: Google Maps
US


Red Flags: 
Recent loading by new snow, wind, or rain
Observation made by: Professional Observer
Snowpit Observations
More detailed information about the snowpack: 

Some clearing occuring in the mid afternoon with light to moderate SW winds.  The last storm produced around 1.5 feet of heavy new snow with lots of wind.  Stability tests showed clean shears close to the old snow/new snow interface and also in the upper new snow where a firmer wind slab had formed.  This wind slab was 6-8'' deep and was firmer/more dense than the other storm snow creating an upside down upper snowpack.  Ski cuts, cornice drops showed no signs of propagation, no shooting cracks were observed.  Besides the photo there was no other avalanche activity seen. 

 Picture:  Cornice and avalanche activity on Wildflower Ridge, trigger unknown.

Snowpit or crown profile photo or graph: 
Snowpack photos: 
Snowpit videos (tests, etc): 

mt.judah2010-12-6 005.avi

Weather Observations
Blowing Snow: 
Yes
Air temperature: 
Below Freezing
Wind Speed: 
Light
Precipitation: 
None
Air temperature trend: 
Static
Wind Direction: 
Southwest
Accumulation rate: 
More detailed information about the weather: