There's a good deal of sirens across the Corpus Christi Bay Area, but I only know the testing times for three systems, those being Refinery Row, Mathis, and Alice. The systems in Agua Dulce, Robstown, Odem, Refugio, Sinton, Sandia, Driscoll, Bishop and Kingsville remain a mystery in terms of testing times. If anyone could share information about the systems' testing schedules, it'd be much-appreciated.
Siren geek from South Texas. Although I've loved sirens for years, I've only recently begun digging into the rich history of civil defense. I also proudly own at least thirty weather band radios.