Severe Weather Threats and Siren Activation in North Texas.
Outdoor warning sirens in North Texas are not just for tornadoes but can also be activated for severe thunderstorm warnings with wind speeds at or above 70 mph, trained storm spotters reporting a tornado in the area, hail 1.5" in diameter or greater, and other types of emergencies deemed by city officials. It is important to have multiple ways of getting weather warnings and to be prepared for severe weather at any time of the year.