When are outdoor warning sirens tested?

Sirens are tested on the first Friday of each month at 10 am. These tests may be postponed if severe weather is in the area to avoid confusion if an actual event occurs. 

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1. What does it mean when I hear the Outdoor Warning Sirens?
2. What should I do when I hear the outdoor warning sirens?
3. Why can’t I hear the outdoor warning sirens in my house?
4. How can I get alerts when I’m at work or in my house?
5. When are outdoor warning sirens tested?
6. Why don’t the outdoor warning sirens sound an all-clear signal?
7. Will the outdoor warning sirens warn me of every dangerous storm?
8. Who activates the outdoor warning sirens?