Strange Sky Phenomenon Photographed over Diablo Grande, California

Driving home from L.A. sightseeing in Hollywood, on out trip home was quite uneventful...until we were somewhere in the Diablo Grande driving north on Interstate 5 (I-5) when I inadvertently mentioned how beautiful the sunset was, in response my wife gets my phone and takes a picture then notices after taking the photo that there was a strange anomaly.


So we look to the sky to confirm our findings and we witnessed the exact same shape for not more than 30 seconds when it dispersed, disappeared, disintegrated... 



Not sure what word to use there. Anyways maybe someone can explain or debunk our curiosity into what we witnessed on February 15, 2016! Mufon case 74507.