Reverse-Wired Federal Signal Thunderbolt 1003 Siren Test | Alert | Marshall, IL | 10/2/18

After seven years in the siren hobby, I was finally granted the chance to hear and see a Thunderbolt in person! I was a little disappointed by the reversed blower, but it was still very exciting to hear a Thunderbolt for the first time. Marshall's siren system is comprised of this Thunderbolt and three 2001-SRNs, one of which can briefly be heard after the Thunderbolt's blower shuts off. Direct coordinates to this siren: 39.39038, -87.69428 #tornadosiren