Outdoor / Severe Weather Warning Sirens

Outdoor Warning System

The Town of Trophy Club's Outdoor Warning System consists of several outdoor warning sirens located throughout the Town that are designed to inform residents who are outside of a possible emergency.  We follow the North Central Texas Council of Governments (NCTCOG) guidelines, which are based off Federal Emergency Management Agency (FEMA) standards, to determine when to activate our outdoor warning system (OWS). The vast majority of communities around us adhere to these same trigger points. (see trigger points below)

 The sirens may be activated in small groups for a localized emergency or they all may be activated simultaneously for a town-wide emergency. The Outdoor Warning Sirens are part of an emergency system designed to provide immediate and valuable information to citizens. The system is not intended to alert those who are within a home or other structure; however, it is possible that you may still be able to hear a siren while indoors depending on your proximity to a siren; taking into account outdoor conditions at the time of activation.

What To Do If Sirens Are Activated

If you hear the sirens while you are outside, please go inside and seek shelter immediately and refer to a television or radio for further instructions. Please do not call 911 for severe weather information. Call 911 only to report life-threatening situations.


The siren will produce a steady tone signal for three minutes. The sound will have a natural decrease/increase due to the rotation of the siren head. The sirens will only be initiated in the case of severe weather directly threatening Trophy Club as reported by the National Weather Service, a storm spotter, or certain Town employees that meet at least one of the following trigger points:

  • Reported hail of 1.25 inches in diameter or greater (or smaller for areas or events where large numbers of people are outdoors)
  • Rotation in a dangerous cloud or a tornado
  • Straight-line winds over 70 Miles Per Hour (mph)

Siren Testing

The Outdoor Warning Sirens are silently tested every day to ensure that the system is functioning correctly. Audible tests of the system are performed on the first Wednesday of every month at 1 p.m, weather permitting.

For questions about emergency planning, please contact Shawn Garrett at 682-237-2947.

Siren with Dark Clouds