Whelen WPS 4004 Siren Test, Vernon Hills, IL (Fast Wail & Voice) - 8/7/18

Monthly test of the tornado sirens in Illinois. This brand new 4004 is located along Hawthorn Parkway in Vernon Hills, not far west from the Hawthorn Mall. This replaced a 3016 that was broken just last year, and this has 560 hz soundcards. It did 3 minutes of fast wail (Whelen's version of attack) plus voice in all four directions. (starts at 4:04) Echoes were pretty insane here. Sirens in Illinois are tested on the 1st Tuesday of every month at 10:00 AM.