Thunderbolt siren timeline By Thunderbolt1023 Jan 1, 1951 Creation of siren Jan 1, 1952 First put up Jun 10, 1958 First document of a thunderbolt siren Period: Jan 1, 1961 to Dec 31, 1962 Thunderbolt 1003 creation (estimate) Jan 1, 1990 Discontinuing of thunderbolts May 18, 2025 Silver street Thunderbolt restored
