Quick report
Saw avalanche from commercial airplane. Only avalanche observed across west bound flight. I was mostly able to see NE-SW terrain north of sand harbor and deep creek.
Avalanche
North of Snow Valley Peak NNE, @8700’ Natural, D2, crown width 300-400’ , length 500’ Crown height estimated 2-3 feet. Likely failed on Jan 2 weak snow. (Size estimations were made using caltopo for the observed avalanche path)