Submission Info
Sunday, January 22, 2017 - 7:00am
Red Flags: 
Recent loading by new snow, wind, or rain
37° 36' 38.628" N, 118° 59' 30.9588" W
Snowpit Observations
More detailed information about the snowpack: 

-Route:  End of Old Mammoth Rd up past mammoth roch and up along ridge to ~9,700', back down.

-Mammoth Rock chute slid with stomp at upper convexity start zone ~7" crown (failed in new snow layer not far above old melt/freeze crust).

-Natural slide happened last night from cross-loading ~9,700' just on leeward (eastern) side of ridgeline, ~1' crown, 100ft across, followed steep section of slope just below rock outcrops / cliffs which normal skin track up goes right thru.  R1-D1.

-Multiple hand-pits showed easy to moderate failure of new snow which is forming a cohesive storm slab (much denser snow than previous few storms).  

-Quick test pit ~9,700', 35deg slope, N, CT tests failing upon isolation ~16" down just above 3cm wind crust that formed yesterday afternoon during most intense period of winds.  (see attached video)

-Lots of small shooting cracks on slopes about 35deg and steeper.    

-Thick dense snow.  ~8" at 9,000' by 7am.

-Light SW winds this morning so far below 9,500'.  

-Impression: Much more cohesive storm slab overall in sheltered areas than the past few storms (soft slab releases more likely now than simple sloughs on slopes >35deg).  Wind-deposit areas more susceptible to releases.  Sluggish to trigger, but higher density makes potential slides more concerning.  

-skiing quality ok, staying on surface, very hard to get up if you fall!  Deep snow immersion a real concern, watch out for tree wells and stay with a buddy even in low angle terrain.   

Snowpit videos (tests, etc): 

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