Snowpit from the Mammoth Rock area

SNOWPACK OBSERVATION
Open low angle N slope at 8600 below Mammoth Rock
Submission Info
Volunteer Observer
Monday, January 21, 2019 - 12:00pm
Red Flags: 
Open low angle N slope at 8600 below Mammoth Rock
Snowpit Observations
More detailed information about the snowpack: 

Toured up towards mammoth rock to assess the new snow instability, to look for buried SH layers, and to assess instability on the buried facets.  The snow surface was quite supportive with only 10cm of ski penetration.  The new snow was is some areas more densely windpacked than others.  Dug in on an open N facing 25 degree at 8600'.  HS 158, new snow 10cm overlain by 1cm of denser wind blow snow.  This windblown snow was as thick as 6cm in other places.  CTM12 Q3 ECTN 13 on the new snow old snow interface.  Did not find any buried surface hoar in that location, but did find a surprisingly thick 3cm layer of graupel.  It's possible the graupel collected in a depression on the old snow surface.  No results on the CT or ECT tests on this graupel layer.  The facets were buried 100cm deep and were starting to round in this location, sticking to eachother on the crystal card and holding cohesion when compressed.  CTH22 Q1(see photo), no results within the ECT, but an irregular fracture with no propogation did form after hitting hard a few times post shoulder.  

Did not notice any whumping, shooting cracks, or collapsing.  Did not see any signs of recent avalanches.  Fun turns on low angle slopes.  

Snowpit or crown profile photo or graph: 
Snowpack photos: 
Compression test on buried facets
Weather Observations
Blowing Snow: 
No
Cloud Cover: 
75% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Calm
Precipitation: 
Air temperature trend: 
Cooling
Wind Direction: 
Accumulation rate: 
More detailed information about the weather: 

On our way out, we witnessed showers of grapuel that coated the snow surface.  

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