I was flipping the dial in my car right after 6:30 this evening and a lot of Spanish-speaking stations were coming through. I did hear one station make reference to Monterrey (in northeastern Mexico near Texas) and another make reference to Zacatecas in central Mexico. My guess that there were all from Mexico since none of the usually far-away stations were in the English language. If they were Texas stations, I would've heard some English-language stations.