http://506sports.com/
This has been around for awhile and shows the nationwide broadcast maps for NFL games and some college games during the football season. Usually by Thursday, they have their maps ready to go for the coming week.
Depending on where you live in Texas, the "local game" could be any of five Noon kickoff games - Oakland at Indy for the Houston area, Cincinnati at Chicago for most of the state. Austin gets New England at Buffalo (Marquis Goodwin debut?). A small swatch of Central Texas is getting Miami at Cleveland (Tannehill?) and El Paso is getting Tennessee at Pittsburgh.
If your local station isn't getting the game you want, there's Sunday Ticket, NFL Red Zone (if you just want to see touchdowns) or the local sprts bar with Sunday Ticket.
I'm going to be at the Austin Sam's Boat with my usual crowd.