This is just one of several civil defense emergency sirens posted around the county. We call them 'tornado sirens' because that's when we hear them. The emergency response folks test these every first Wednesday of the month at noon. Yesterday was test day. I was in a funeral procession and thought my car was tearing up! Until I lowered the window and realized it was our friendly siren test. We're glad to have these. Tuscaloosa has weathered many tornadoes. We take any warning very seriously. Does your town have an emergency warning system?