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An example of a tornado warning polygon issued by the National Weather Service. A tornado warning (SAME code: TOR) is a public warning that is issued by weather forecasting agencies to an area in the direct path of a tornado, or a severe thunderstorm capable of producing one, and advises individuals in that area to take cover.
"Sirens may be activated for Tornado Warnings, Severe Thunder Storm Warnings, if there will be sustained winds of 45 MPH or greater with 1” hail, Hazardous Materials incidents, or Civil Emergencies.
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).
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.
Sirens are used on emergency service vehicles such as ambulances, police cars, and fire engines. Many fire sirens (used for summoning volunteer firefighters) serve double duty as tornado or civil defense sirens, alerting an entire community of impending danger. Most fire sirens are either mounted on the roof of a fire station or on a pole next ...
What do the warning sirens in Fort Worth mean? Fort Worth has an outdoor siren system that sounds when severe weather conditions are present. The storm spotter, which triggers the siren ...
Since its initial usage in May 1999, the National Weather Service (NWS) in the United States has used the tornado emergency bulletin — a high-end classification of tornado warning — sent through either the issuance of a warning or via a "severe weather statement" that provides updated information on an ongoing warning—that is issued when a violent tornado (confirmed by radar or ground ...
During tornado warnings, move to the lowest level of a sturdy building. It is best to go to a basement, safe room or storm cellar. If unavailable, use an interior room or hallway without windows.