Test slope results and Snowpit near Red Cone

Submission Info
Saturday, January 6, 2018 - 10:00am
Red Flags: 
Recent loading by new snow, wind, or rain
37° 35' 57.84" N, 119° 1' 4.44" W
Snowpit Observations
More detailed information about the snowpack: 

Toured up sheltered, low angle slopes to the top of the knob E of Red Cone and above Crystal Lake. Snow level at 0800am this morning was 8100'. New snow at 0840am at 8800'= 7cm, at 0900 at 8950'= 15cm, and at 0945am at 9593'= 25cm. Deepest new snow I found was a moist 25cm sitting on top of the fragile rain crust deposited on 1/4. Several kick tests on NW-N-NE aspects between 9000' and 9500' had positive results (see photos). These small D1 avalanches I easily triggered were sliding on top of the 1/4 rain crust, the full depth of the new storm snow and did not propagate across the slope any wider than the length of my skis. But, again, I was testing small, low consequence slopes surrounded by low angled terrain. Snowpit dug to further test the storm snow and the snow under the rain crust in a large opening in the trees just below the top of the knob (see attached profile) confirmed my test slopes and hand shears: tests were failing just above and just below the rain crust, but also at the interface between the snow that fell before being covered by the crust and some large facets which were probably the snow surface prior to 1/4.

Winds were calmer than I expected until about 1045am when it stopped snowing and the wind picked up from the SW. Winds were consistently moderate with strong gusts after that. Blowing snow observed at all elevations (see video).

Snowpit or crown profile photo or graph: 
Snowpack photos: 
Positive Kick Test Results sliding at the Old/New snow interface.
Another D1 Soft Slab intentionally triggered on a small rollover.
Primary layers of concern today above and below the rain crust from 1/4.
Snowpit videos (tests, etc): 
Weather Observations
Blowing Snow: 
Air temperature: 
Wind Speed: 
Air temperature trend: 
Wind Direction: 
Accumulation rate: 
More detailed information about the weather: 
-- placeholder --

ESAC receives significant financial support from ...