Me not wanting to move to Tennessee..

From your other question it seems to me that your dad is quite conservative and might be out of his element in California. I live out west and I am a fairly conservative person myself (this does not mean I disown children), and some things here are uncomfortable to me as well. There may be another underlying reason to move as well. Hard times are pretty much everywhere, maybe he has some financial issues being in California, it isn’t cheap.

All of that aside you really do just need to bring it up. Your dad seems to be the one making decisions, if your mother is in the picture ask her about it as well (and first in my experience). Maybe she can enlighten you about his reasons. Also look for ways to keep yourself in California, if you have a plan your father may be more receptive to allowing you to stay while the rest of the family moves.

Also try to keep in mind these are your parents and they are human. They care about you, but are as flawed as the rest of us. If you have to leave you can always move back. Best of luck.