The payload was the 4 digit code, it was a large tornado warning siren. The msg was "be loud". I lived 300 yards from it, and had a dad with a police scanner.

The payload was the 4 digit code, it was a large tornado warning siren. The msg was "be loud". I lived 300 yards from it, and had a dad with a police scanner. I noticed a pattern after a while... Saturday's they ran some test of the system...4 digits at noon on the radio and a blasting sound would follow