Outdoor Warning Sirens

Southlake operates five outdoor warning sirens that sound during severe weather events. The sirens are placed strategically throughout the city and are designed to warn people who are in common outdoor areas such as parks and shopping centers. The sirens are not meant to be heard indoors. The outdoor warning system will ONLY be activated when there is severe life threatening weather and not for regular thunderstorms and small hail.

The City of Southlake highly recommends each home and business have other means to receive severe weather warnings and notifications, including internet, radio, television or a NOAA weather radio which can be programmed with a code to activate when there are storm warnings in our region. 


When Does Southlake Activate the Sirens?


The City of Southlake only activates the sirens in the following conditions:
  • A tornado warning issued by the National Weather Service
  • Tornado or funnel cloud reported by trained SKYWARN storm spotters
  • Sustained winds in excess of 70 mph
  • Reports of hail larger than 1.25 inches
  • Additional Warning Systems
  • In addition to the five outdoor warning sirens located throughout the City, each school within the Carroll Independent School District and the Keller Independent School District are equipped with an alert radio that is activated in conjunction with the outdoor warning system, providing another layer of warning coverage for residents and visitors of Southlake.  

Mobile Warning Sirens


In 2016, the City of Southlake introduced two new mobile warning outdoor sirens to provide an additional layer to our existing comprehensive warning capabilities. The sirens are the first of their kind in North Central Texas and are utilized during all major community events. These mobile sirens can act as loud speakers and are capable of providing event-specific warnings and information to large gatherings of people. 

Siren Testing


The City of Southlake tests its Outdoor Warning System on the first Wednesday of each month at 1:00 pm, weather conditions allowing. If conditions are favorable for severe weather on a test day, the test will not be conducted. 

Siren Pic