Wind Noise @ speed!
 

Good morning,
I have just returned from my first highway trip with my 2015 LS 460 which performed impeccably eating up mile after mile. My issue was excessive wind noise. It seemed to come from behind me. All my windows were fully up and the sunroof fully closed. For all intents and purposes I would say the noise came from the shark fin antenna, but that is not loose. Any suggestions or similar experiences welcomed.
Thanks,

Dominic