The City of Grapevine operates fourteen solar powered outdoor warning sirens to notify residents and visitors of potentials hazards, weather, and other emergencies.

When the sirens sound, you should move indoors, take cover, and monitor local television, radio, or official social media sources. The sirens will initially sound for three minutes but may be activated multiple times if a threat continues. By monitoring the situation, individuals can make informed decisions and know when it is safe to leave your designated safe room. There is no all clear siren activation.  

It is important to note that the Outdoor Warning sirens are not designed nor placed to be heard in your home or other indoor locations.

Sirens will be sounded when any of the following conditions are present:

• National Weather Service issued Tornado Warning impacting Grapevine.
• Trained storm spotters observe a tornado in Grapevine, or in a neighboring jurisdiction that has the potential to affect Grapevine.
• National Weather Service issued Severe Thunderstorm Warning with winds of 70 mph (or higher) impacting Grapevine.
• National Weather Service issued Severe Thunderstorm Warning with hail of 1.5 inches (or greater) impacting Grapevine.
• Other threats to the community as directed by City of Grapevine officials such as:
  • Local Warning Point activities in coordination with the National Emergency Alert System
  • Hazardous materials release into the atmosphere
  • Catastrophic emergencies that pose an immediate threat to safety

The Outdoor Warning Sirens are tested the first Wednesday of each month at 1:00 PM, provided thunderstorms or excessive overcast is not forecasted.