Wichita Falls, Electra, Burkburnett, Archer City and Quanah test their sirens on the first Monday at noon. Iowa park, the last Friday of the month around 10 or 11. Sirens in this area include Thunderbolt 1000s and 1003s, SD10s, 2T22s, Federal 2001s, Federal Eclipse, Sentrys, and Whelens.