W want to remind everyone how Collierville’s outdoor warning sirens are used. Hopefully, they won’t be needed, but now is a great time to refresh everyone on their purpose.

When Sirens ARE Activated:

• A tornado warning is issued by the National Weather Service, and any part of Collierville is within the warned area.
• Warnings are based on geographic zones (polygons)—so sirens may sound in other parts of Shelby County while Collierville remains silent if we are not in the warning zone.
• Sirens may also be used for major disasters or emergency alerts affecting the area.
  
  

What Sirens DO NOT Mean:

• They are not activated for severe thunderstorm warnings.
• They are outdoor alerts only and may not be heard indoors.
  
  

Weekly Siren Testing:
Every Saturday at Noon, unless cloudy or inclement weather is expected to prevent confusion.

Get Reliable Weather Alerts from Multiple Sources:

• Alert Collierville - Sign up for official emergency notifications from the Town. Ways to sign up: 
  • Text “alerts” to 901-446-0299
  • Call 901-446-0299
  • Visit hyper-reach.com/tncolliervillesignup.html
  • Tell your Alexa device: “Alexa, enable Hyper-Reach”
• Weather apps
• NOAA weather radios
• Local news