North Texas March 29, 2017 6:30 pm Frisco Reviews Why Outdoor Warning Siren System Failed Outdoor warning sirens sounded in several North Texas cities as storms rolled through overnight Tuesday. But in Frisco, some sirens worked and others did not. Wake Up to Something Good 3:15 Attendees on alert at Southlake fest as severe weather threatens North Texas 1:39 Communities clean up after monster tornadoes 0:46 San Marcos Police issue Amber Alert for toddler 2:07 Police looking for murder weapon in Bowie HS shooting 2:10 Southlake's Art in the Square prepares for inclement weather