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A tornado, also known as a twister, is a rapidly rotating column of air that extends vertically from the surface of the Earth to the base of a cumulonimbus or cumulus cloud. Tornadoes are often (but not always) visible in the form of a condensation funnel originating from the cloud base, with a cloud of rotating debris and dust close to the ground. Most…
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tornadoes cloud funnel ground also storm may damage weather winds radar occur wind form air united often area states many
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Tornado | Area of occurrence | Every continent except Antarctica | 1.00 | infobox |
| Tornado | Effect | Wind damage | 1.00 | infobox |
| Tornado | Season | Any, though primarily in spring or summer | 1.00 | infobox |
| Tornado | is a | violently rotating column of air | 0.90 | text |
| Tornado | is a | type of tornado in which two or more columns of spinning air rotate about their own axes and at the same time revolve around a common center | 0.90 | text |
| Tornado | is a | distinct circulation | 0.90 | text |
| temperature | instance of | tornadoes also exhibit changes in atmospheric variables | 0.80 | text |
| moisture | instance of | tornadoes also exhibit changes in atmospheric variables | 0.80 | text |
| and atmospheric pressure | instance of | tornadoes also exhibit changes in atmospheric variables | 0.80 | text |
| sirens | instance of | The organizations activate public warning systems | 0.80 | text |
| the Emergency Alert System | instance of | The organizations activate public warning systems | 0.80 | text |
| NEXRAD detect signatures that suggest the presence of tornadoes | instance of | has maintained a network of spotters in the United Kingdom since 1974.Storm spotters are required because radar systems | 0.80 | text |
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