Sherwin - Snowpack and weather

SNOWPACK OBSERVATION
Sherwins above Mammoth Rock
Submission Info
Forecaster
Tuesday, December 17, 2019 - 2:00pm
37° 36' 38.3076" N, 118° 59' 36.258" W
Snowpit Observations
More detailed information about the snowpack: 

Afternoon tour up the Sherwins to check on the snowpack and wind effects.  Calm grey-bird day with light southerly wind only at the very top of the ridge.  No visible snow transport on any of the sourounding peaks along the crest.  Dug a pit at 9450' on a NE facing slope in an opening between the trees, see attached profile.  Most interesting thing was ECT tests propogating under the melt freeze crust 15-20cm down from the surface in a soft layer of snow.  A strong temperature gradient exists in the upper layers of the snowpack, presumably leading to near surface faceting.  The snow grains were small and did not appear to be distinct facets under the scope, but the layers that were not densely wind deposited did have a bit of a loose feel to them.  The ECT test and weak layer is not too concerning the way it is now with a small amount of snow on top, but in a spot with a greater amount of wind deposited snow, or with a heavy dump of new snow ontop, this layer would be much more concerning.  No other signs of instability anywhere.  

The upper layers of wind deposit were mostly supportable up higher, and the melt freeze crust supportable down lower (<9000').  Skiing conditions were not bad!  Not stellar, but not bad :-)      

Snowpit or crown profile photo or graph: 
Weather Observations
Blowing Snow: 
No
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Calm
Precipitation: 
None
Wind Direction: 
South
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