The City’s Outdoor Warning Siren System may be activated for any kind of emergency – not just severe weather. People often have the misconception that the sirens are meant to be heard indoors. However, the siren system is intended to be heard outdoors. You may not hear it inside or in noisy areas.

When you hear the Outdoor Warning Siren System, you should immediately go inside and tune to local news or radio for additional information so you can make a decision on what actions you should take. Then, go to the lowest level, most interior space of your home or office.

The Outdoor Warning Siren System consists of 26 strategically placed sirens that are activated for one or more of the following conditions:

  • A tornado warning issued by the National Weather Service in the City of Grand Prairie
  • Tornado, funnel cloud or rotation reported by a reliable source
  • Destructive winds in excess of 70 mph
  • Reports of hail larger than 1.75 to 2 inches
  • Chemical spill
  • State or national emergency
  • Other emergencies as appropriate

The city of Grand Prairie tests the city's outdoor warning siren system on the first Wednesday of every month at 1 p.m. unless there is inclement weather. See which outdoor warning siren is closest to you: View Outdoor Siren Locations (PDF)

To receive emergency notifications indoors, a National Oceanic and Atmospheric Administration (NOAA) All Hazards and Weather Alert Radio with the Specific Area Message Encoding (SAME) feature is recommended. The NOAA radio allows you to keep up to date on all types of emergencies. You can purchase one at many local retailers starting at $20. NOAA radios with the SAME feature can be programmed to provide emergency information specific to your area. The codes for our four counties are (

Dallas County: 048113
Tarrant County: 048439
Johnson County: 048251
Ellis County: 048139

Sistema De Advertencia Al Aire Libre (pdf)