Go Search

Outdoor Warning Sirens 

The Frisco Fire Department is concerned about the safety of our citizens and visitors.  An Outdoor Warning Siren System was implemented in 2007 to assist in alerting our citizens of  imminent danger. These dangers include, but are not limited to: tornadoes, flash floods, winds in excess of 70 MPH, reported hail of 1.25” in diameter or greater, national security or environmental threats. 

In order to ensure sirens are working properly, sirens are tested the first Wednesday of each month at 12:00 noon.  All other Wednesdays, the sirens are tested using the “voice” portion only.  In addition, these sirens are silently tested daily. 

When testing the sirens, the Fire Department will only sound the sirens on days when skies are clear or overcast but not threatening.  When severe weather is in the forecast, sirens will not be activated unless there is an actual emergency. This is done so citizens are certain the activation is real and not a test.

These sirens are designed to alert citizens, who are outdoors, to immediately seek shelter, due to an imminent threat to our community.  Citizens should then tune in to the radio, television or Frisco’s social media feeds for more information.



The City of Frisco’s Outdoor Warning Siren system consists of 35 sirens placed strategically throughout the City.  The sirens may be activated individually or in groups in order to provide localized warnings.  Sirens may also be activated simultaneously as a general alert for the entire community.  The Outdoor Warning Sirens can be controlled from either the Central Fire Station, the 9-1-1 Dispatch Center located at the Frisco Police Department or from certain Fire Department vehicles.  The Outdoor Warning Siren system uses several different and unique tones to alert residents to the imminent approach of severe weather and other emergencies requiring immediate notification.  This system is a part of an emergency network designed to provide for the safety of our citizens. 


The City of Frisco utilizes two types of signals generated by the outdoor warning sirens: 

  • The Wail Signal is used for an actual Tornado Warning as well as our Wednesday Siren Testing.
  • The Alert Signal is used for other alerts the City of Frisco requests its citizens to be aware of, such as a Civil Defense Alert.

What do I do when I hear the warning sirens?
Remain calm and go inside and seek shelter immediately; turn on a radio or television and listen carefully to instructions.

WBAP Radio 820 AM is the designated Emergency Alert System (EAS) station for our area. Frisco residents with cable should tune to:

Channel 12 for Grande subscribers
Channel 16 for Time-Warner subscribers
Channel 37 for Verizon FIOS subscribers
Channel 99 for AT&T U-verse subscribers
Tune to the appropriate channel, for your location, listed above to receive official information from the Frisco Communications Department. Most other local radio and TV stations will also broadcast emergency information.

Stay indoors until the danger passes.

Please do not call 9-1-1 or Frisco Fire Stations for information unless you are reporting a life-threatening situation or hazardous condition.

City of Frisco Warning Siren Location Map 

City of Frisco, Texas
George A. Purefoy Municipal Center

6101 Frisco Square Blvd
Frisco, Texas 75034
Find Us

All Rights Reserved. 2011 City of Frisco, Texas