The Outdoor Warning Sirens will be audibly tested on the first Wednesday of each month at 12:00 PM, if weather conditions are favorable.
These sirens are designed to alert citizens, who are outdoors, to an imminent threat in the community. When sounded, citizens should seek shelter immediately in a stable structure. Once secure, citizens should listen to a radio and/or television for emergency warning details and further instructions. While tornado warnings are the most common cause for siren activation, the sirens should not be considered a "tornado siren." They are intended as an "all-hazards" alerting system and may be activated for any type of emergency situation.
the outdoor warning sirens can be activated when:
The National Weather Service issues a Garland area Tornado Warning or Severe Thunderstorm Warning with destructive winds at or above 70 mph
Trained storm spotters have reported a tornado with the potential to affect the City of Garland
Hail of 1.75 inches (golf ball size) in diameter is imminent
Deemed necessary by City of Garland officials (i.e. in the event of any emergency when officials need to get citizens to move indoors for their safety such as a chemical spill)