I don't know if it is Barometric Pressure as much as possibly adrenaline rushes...I used to get these a lot too and I think several people on the boards have mentioned similar. It is probably quite common with inner ear although I don't think anybody can tell you why. Maybe just your body trying to deal with all the bizarre signals it is getting from your messed up ear.
I do believe, however, that Barometric Pressure can have real effects on migraine including vestibular migraine...for me I always feel awful whenever a low pressure front comes through...like now for example...
take it easy