Outdoor Warning Sirens
Outdoor warning sirens are used to alert people who are out of doors to go indoors and seek shelter.
CEMA operates sixty warning sirens located throughout the city, many at local fire houses. The sirens are maintained and repaired through a partnership with the St. Louis City Street Department. The Outdoor Warning Siren is activated any time there is a TORNADO WARNING issued for the City of St. Louis. This is an OUTDOOR warning system and is meant to direct citizens to go indoors during an emergency or threat of severe weather.
It is recommended that upon hearing the siren, you immediately seek shelter and refer to the local media or a NOAA weather radio for further information or updates.
The City of St. Louis does not utilize the siren system to issue an "All Clear". Any siren activation is meant to prompt immediate action!
Sirens are tested on the first Monday of every month at 11:00 a.m., unless there is inclement weather. The siren will sound for three minutes.
Report a siren that does not sound during the monthly test. Be sure to include your approximate location so that we can locate the appropriate siren.
The City of St. Louis also participates in the Missouri Statewide Tornado Drill each spring, activating the sirens and encouraging citizens to practice what they would do in the event of an actual tornado.