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  2. 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).

  3. ATI HPSS - Wikipedia

    en.wikipedia.org/wiki/ATI_HPSS

    They run 575 Hz alert for tornado warnings. Menominee, Michigan has three rotating ATI HPSS32R units; Pensacola NAS, Florida, ATI HPSS16 (mostly), the sirens on Pensacola's navy base are mostly used for tornado warnings and they play the colors in the morning and evening. When a warning is issued, these siren sound ATI's version of wail signal ...

  4. Wireless Emergency Alerts - Wikipedia

    en.wikipedia.org/wiki/Wireless_Emergency_Alerts

    An example of a Wireless Emergency Alert on an Android smartphone, indicating a Tornado Warning in the covered area. Wireless Emergency Alerts (WEA), formerly known as the Commercial Mobile Alert System (CMAS) and, prior to that, as the Personal Localized Alerting Network (PLAN), [1] is an alerting network in the United States designed to disseminate emergency alerts to cell phones using Cell ...

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

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

    Vasu Communications will upgrade controls for the county's 44 tornado warning sirens. American Rescue Plan Act dollars will pay for the project. Richland County to spent nearly $194,000 to upgrade ...

  6. Severe thunderstorm warning - Wikipedia

    en.wikipedia.org/wiki/Severe_thunderstorm_warning

    The warning is then disseminated to the public through terrestrial television and radio stations, online media, mobile app and SMS messaging through Emergency Mobile Alert (EMA); if a tornado has been sighted or indicated by radar within the warned area during the severe thunderstorm warning's duration, civil defense sirens, if present, are ...

  7. Tennessee tornado sirens failed to sound in storm that ... - AOL

    www.aol.com/tennessee-tornado-sirens-failed...

    Since 2003, such sirens have been used in the state to alert residents to imminent danger from tornadoes.. In 2013, a $2m grant was provided to the Nashville county to upgrade the system with new ...

  8. Tornado siren to move to water tower at Brookside Park - here ...

    www.aol.com/tornado-siren-move-water-tower...

    Commissioners accepted a quote from VASU Communications in the amount of $28,370.07 for the removal of the tornado siren at Edison School and the purchase and installation of a new tornado siren ...

  9. Federal Signal Modulator - Wikipedia

    en.wikipedia.org/wiki/Federal_Signal_Modulator

    The Modulators in Chicago's siren system formerly used to run on the Alternate Wail tone during tornado warnings in order to vary from emergency vehicle sirens. However, in O'Hare International Airport, instead of using the main UV Wail or Attack, they use an Eclipse 8 (possibly) sound card doing attack. Before that is the Westminster Chimes ...