A satellite tornado is a tornado that revolves around a larger, primary tornado and interacts with the same mesocyclone. Satellite tornadoes occur apart from the primary tornado and are not considered subvortices; the primary tornado and satellite tornadoes are considered to be separate tornadoes. The cause of satellite tornadoes is not known. Such tornadoes are more often anticyclonic than are typical tornadoes and these pairs may be referred to as tornado couplets.[1] Satellite tornadoes commonly occur in association with very powerful, large, and destructive tornadoes, indicative also of the strength and severity of the parent supercell thunderstorm.[2]
Satellite tornadoes are relatively uncommon. When a satellite tornado does occur, there is often more than one orbiting satellite spawned during the life cycle of the tornado or with successive primary tornadoes spawned by the parent supercell (a process known as cyclic tornadogenesis and leading to a tornado family). On tornado outbreak days, if satellite tornadoes occur with one supercell, there is an elevated probability of their occurrence with other supercells.[citation needed]
Satellite tornadoes tend to orbit their parent cyclonically, counterclockwise in the Northern Hemisphere, and clockwise in the Southern Hemisphere, and will generally form near the edge of a supercell's mesocyclone, and gradually travel inward to the parent tornado.[3] Satellite tornadoes may merge into their companion tornado although the appearance of this occurring is often an illusion caused when an orbiting tornado revolves around the backside of a primary tornado obscuring view of the satellite.[4] During the March 1990 Central United States tornado outbreak, one member of a tornado family (rated F5) constricted and became a satellite tornado of the next tornado of the family before merging into the new primary tornado which soon also intensified to F5.[5]
Examples
Some examples of tornado couplets include the Tri-State Tornado,[6] multiple tornadoes during the 1999 Oklahoma tornado outbreak,[7] the 2007 Greensburg tornado,[8] and the 2013 El Reno tornado.[9] Satellite tornadoes are more likely to be recognized in recent decades than in the far past as eyewitness accounts as well as damage survey information are often available for later events. The advent of storm chasing, in particular, boosts the likelihood that satellite tornadoes are noticed visually and/or on mobile radar.[10] These tornadoes may remain over open country and thus cause less structural damage and consequently are less widely known. Such examples include near Beloit, Kansas on 15 May 1990 and during Project VORTEX near Allison, Texas on 8 June 1995, among other events.[4]
1 2 3 4 5 Grazulis, Thomas P. (1993). Significant tornadoes, 1680-1991: A Chronology and Analysis of Events. St. Johnsbury, Vermont: Environmental Films. ISBN1-879362-03-1.
↑ Kansas Event Report: EF3 Tornado. National Weather Service Office in Topeka, Kansas (Report). National Centers for Environmental Information. 2013. Retrieved February 20, 2017.
↑ Kansas Event Report: EF1 Tornado. National Weather Service Office in Topeka, Kansas (Report). National Centers for Environmental Information. 2013. Retrieved February 20, 2017.
↑ Illinois Event Report: EF4 Tornado. National Weather Service Weather Forecast Office in Chicago, Illinois (Report). National Climatic Data Center. 2015. Retrieved December 31, 2015.
↑ Illinois Event Report: EF0 Tornado. National Weather Service Weather Forecast Office in Chicago, Illinois (Report). National Climatic Data Center. 2015. Retrieved December 31, 2015.
↑ Iowa Event Report: EF0 Tornado. National Weather Service Weather Forecast Office in Des Moines, Iowa (Report). National Centers for Environmental Information. 2016. Retrieved December 7, 2016.
↑ Iowa Event Report: EF0 Tornado. National Weather Service Weather Forecast Office in Des Moines, Iowa (Report). National Centers for Environmental Information. 2016. Retrieved December 7, 2016.
↑ Oklahoma Event Report: EF1 Tornado. National Weather Service Weather Forecast Office in Norman, Oklahoma (Report). National Centers for Environmental Information. 2016. Retrieved December 10, 2016.
↑ Oklahoma Event Report: EFU Tornado. National Weather Service Weather Forecast Office in Norman, Oklahoma (Report). National Centers for Environmental Information. 2016. Retrieved December 10, 2016.
↑ Oklahoma Event Report: EFU Tornado. National Weather Service Weather Forecast Office in Tulsa, Oklahoma (Report). National Centers for Environmental Information. 2016. Retrieved December 10, 2016.
↑ Oklahoma Event Report: EFU Tornado. National Weather Service Weather Forecast Office in Tulsa, Oklahoma (Report). National Centers for Environmental Information. 2016. Retrieved December 10, 2016.
↑ Wyoming Event Report: EF3 Tornado. National Weather Service Weather Forecast Office in Cheyenne, Wyoming (Report). National Centers for Environmental Mesonet. 2018. Retrieved March 2, 2019.
↑ Wyoming Event Report: EF2 Tornado. National Weather Service Weather Forecast Office in Cheyenne, Wyoming (Report). National Centers for Environmental Mesonet. 2018. Retrieved March 2, 2019.
↑ Iowa Event Report: EF3 Tornado. National Centers for Environmental Information (Report). National Weather Service. Retrieved 8 April 2022.
↑ Iowa Event Report: EF2 Tornado. National Centers for Environmental Information (Report). National Weather Service. Retrieved 8 April 2022.
↑ Iowa Event Report: EF0 Tornado. National Centers for Environmental Information (Report). National Weather Service. Retrieved 8 April 2022.
↑ Oklahoma Event Report: EF2 Tornado. National Weather Service Weather Forecast Office in Tulsa, Oklahoma (Report). National Centers for Environmental Information. 2019. Retrieved December 21, 2019.
↑ Oklahoma Event Report: EFU Tornado. National Weather Service Weather Forecast Office in Tulsa, Oklahoma (Report). National Centers for Environmental Information. 2019. Retrieved December 21, 2019.
1 2 Wyoming Event Report: EF2 Tornado. National Weather Service Weather Forecast Office in Cheyenne, Wyoming (Report). National Centers for Environmental Information. 2019. Retrieved January 18, 2020.
↑ Storm Events Database March 13, 2021. National Centers for Environmental Information (Report). National Centers for Environmental Information. Retrieved June 16, 2021.
↑ Storm Events Database April 27, 2021. National Centers for Environmental Information (Report). National Centers for Environmental Information. Retrieved August 12, 2021.
↑ Storm Events Database April 27, 2021. National Centers for Environmental Information (Report). National Centers for Environmental Information. Retrieved August 12, 2021.
↑ Storm Events Database May 19, 2021. National Centers for Environmental Information (Report). National Centers for Environmental Information. Retrieved August 28, 2021.
↑ Storm Events Database May 19, 2021. National Centers for Environmental Information (Report). National Centers for Environmental Information. Retrieved August 28, 2021.
↑ Storm Events Database October 12, 2021. National Centers for Environmental Information (Report). National Centers for Environmental Information. Retrieved January 24, 2022.
↑ Storm Events Database October 12, 2021. National Centers for Environmental Information (Report). National Centers for Environmental Information. Retrieved January 24, 2022.
↑ Kentucky Event Report: EF3 Tornado. National Weather Service in Louisville, Kentucky (Report). National Centers for Environmental Information. 2021. Retrieved March 20, 2022.
↑ Kentucky Event Report: EF2 Tornado. National Weather Service in Louisville, Kentucky (Report). National Centers for Environmental Information. 2021. Retrieved March 20, 2022.
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