Suface Hoar near Mammoth Rock

Mammoth rock
Submission Info
Monday, January 14, 2019 - 12:30pm
Red Flags: 
37° 36' 45.666" N, 118° 59' 22.8588" W
Snowpit Observations
More detailed information about the snowpack: 

I Went for a quick tour above Mammoth rock today.  Winds were light all day, and the snow moved in around 12.  I noted pretty widespread surface hoar 4-8mm in size throughout my tour today. It seemed to be more prevalent in more open areas not as much in areas with denser tree coverage.   I did not notice any cracking, wumphing, or recent avalanche today though I did note some small loose dry activity in steeper areas.   I dug in on 28° slope on a protected NE aspect at 9400’.  Snowpack structure remains poor, and test results showed fractures with a high sheer quality reacting to moderate loading force on a density change ~15 cm~ from the surface.  As new snow continued to fall this afternoon, I was able to confirm surface hoar buried just below the surface snow in many diverse locations. I fear this may be a problem in the making as the storm develops this week.

Snowpit or crown profile photo or graph: 
Snowpack photos: 
Weather Observations
Blowing Snow: 
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Air temperature trend: 
Wind Direction: 
Accumulation rate: 
Less than 1 in. per hour
More detailed information about the weather: 

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