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  2. Why is the tornado siren going off? What to know about ... - AOL

    www.aol.com/why-tornado-siren-going-off...

    Most Iowa counties activate sirens for severe storms with winds of 65-70 mph in addition to tornado or funnel cloud sightings, said Troy Bass, coordinator with Warren County emergency management.

  3. Federal Signal 3T22 - Wikipedia

    en.wikipedia.org/wiki/Federal_Signal_3T22

    A 3T22A is three phase, while a 3T22B is single phase. The siren was mainly used for air raid warnings during the Cold War era and weather warnings after the war. In the early 1990s, the siren's production was stopped when it was replaced with the newer 2001-SRN, which can reach 126db (also measured 100 feet away), hence the name.

  4. Richland County to spent nearly $194,000 to upgrade tornado ...

    www.aol.com/richland-county-spent-nearly-194...

    The upgrade plan does not include Shelby, which maintains four tornado sirens. In other business Tuesday, commissioners approved a $910 base contract with Truly Nolan Pest Control to deal with a ...

  5. List of sirens built by Alerting Communicators of America

    en.wikipedia.org/wiki/List_of_sirens_built_by...

    This siren is similar to Federal Signal's Thunderbolt series. Only a single unit remains in service in Milwaukee, WI. Screamers Electro-Mechanical 2, 5, 7.5, 10 8, 9, 9/12, 10/12 1968–1994 Omni Directional 102–115 dB at 100 ft. Series of small vertical sirens, comparable to Federal Signal Corporation's vertical sirens. Sentry 95

  6. Civil defense siren - Wikipedia

    en.wikipedia.org/wiki/Civil_defense_siren

    A civil defense siren is a siren used to provide an emergency population warning to the general population of approaching danger. Initially designed to warn city dwellers of air raids (air-raid sirens) during World War II, they were later used to warn of nuclear attack and natural disasters, such as tornadoes (tornado sirens).

  7. NWS now confirms a total 5 tornadoes in Ohio from storm ... - AOL

    www.aol.com/tornadoes-confirmed-nws-says...

    Winds ripped off the roof to his workshop that was large enough to store a tractor-trailer. ... Tornado sirens were activated in Franklin County after 5 a.m. Wednesday in response to a suspected ...

  8. Why are sirens going off in Oklahoma City today? Tornado ...

    www.aol.com/why-sirens-going-off-oklahoma...

    The tornado siren tests are always at 12 p.m. on Saturdays in Oklahoma City. There are no softball games scheduled for noon on Saturday, but patrons in Oklahoma City's vicinity will likely hear ...

  9. Thunderbolt (siren) - Wikipedia

    en.wikipedia.org/wiki/Thunderbolt_(siren)

    A Federal Signal Thunderbolt 1003 siren. The Thunderbolt is a mechanical outdoor warning siren that was manufactured by Federal Signal Corporation from 1951 until its production ended in 1991. [1] It is a unidirectional, rotating siren with a large square-shaped horn, and can come in various colors, usually yellow, by request.

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