Sherwin's Mammoth Rock - Snowpack

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SNOWPACK OBSERVATION
End of Old Mammoth Rd up to just above Mammoth Rock
Submission Info
Forecaster
Friday, November 29, 2019 - 4:45pm
Red Flags: 
Recent loading by new snow, wind, or rain
37° 36' 54.1152" N, 118° 59' 30.5808" W
Snowpit Observations
More detailed information about the snowpack: 

Quick evening tour from the end of Old Mammoth Rd up to just above Mammoth Rock to check on early season snowpack after the first real storm of the season.  

Thigh to waist deep total snow depth, wasy to probe with ski pole to the ground.  Moderate SW winds transporting snow in exposed areas especially across ridges.  For the most part right-side-up snow pack, except for a 1-4" layer of denser wind deposited snow.  Dug a quick pit at 8900' on NW facing slope in the trees:

Surface-4cm: 4finger minus wind deposited snow

4cm-15cm: Fist minus

15cm-45cm: Fist

45cm-70cm: Fist plus

70cm-90cm: 4 finger

90cm-95cm: 1 finger 

On leeward side of ridges where more recent snow was being deposited some shooting cracks up to 5ft long occuring in top layer of denser snow ~3-5" thick.  

Thank you to those who broke trail ealier today, otherwise very arduous and slow going trail breaking with knee to thigh deep ski penetration.  Easier to ski down staying mostly in skin track to keep momentum and not auger in.  Was very cautious as concern over shallowly buried obstacles is very real.  

Talked to one hardy soul who just finished trenching out to Red Cone and back who reported thigh to waist deep skinning, over 6ft deep snow pack in some of the upper reaches, and skiing back in skin track.  He hit one log with his shins near the top of his descent, fortunatly not going too fast.  

Overall impression of stability: Lots of new light snow over last three days combined with periods of wind would make steep slopes concerning for wind slabs, storm slabs and significant sloughing.  As this new snow settles, stability will increase, but the incoming significant storm at the end of this weekend is expected to be quite a bit warmer and denser .... denser on lighter ... not a good stability recipe.  

Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Moderate
Precipitation: 
Snow
Air temperature trend: 
Cooling
Wind Direction: 
Southwest
Accumulation rate: 
Less than 1 in. per hour
More detailed information about the weather: 

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