Cycloidal marks

Short description: Debris piles made by powerful tornadoes

Circular cycloidal marks observed following an F4 tornado near Scottsbluff, Nebraska in 1955

Cycloidal marks, also known as cycloidal damage swaths, are lineo-circular piles of debris that are produced by some powerful multiple-vortex tornadoes.[1][2] Cycloidal marks are typically an indication that a tornado possessed suction vortices. Notable tornadoes that have produced cycloidal marks include the 2008 Parkersburg–New Hartford tornado,[3] 2016 Dodge City tornadoes and the 2022 Nullarbor Plain tornado.[4][5] Cycloidal marks created by dust devils have been documented on Mars by the Mars Global Surveyor.[6][7]

## See also

* Tornado intensity
* Tornado damage survey

## References

1. ↑ Wakimoto, Roger (October 4, 2021). "The Dodge City Tornadoes on 24 May 2016: Understanding Cycloidal Marks in Surface Damage Tracks and an Analysis of the Debris Cloud". https://essic.umd.edu/events/the-dodge-city-tornadoes-on-24-may-2016-understanding-cycloidal-marks-in-surface-damage-tracks-and-an-analysis-of-the-debris-cloud/.
2. ↑ Butler, Kirstin. "The Remarkable Mind of Mr. Tornado" (in en). https://www.pbs.org/wgbh/americanexperience/features/mr-tornado-remarkable-mind/.
3. ↑ Lipar, Matej (November 2024). "Tornado scar on the Nullarbor Plain, Australia". https://www.researchgate.net/publication/386182873_Tornado_scar_on_the_Nullarbor_Plain_Australia.
4. ↑ Wakimoto, Roger M.; Wienhoff, Zachary; Reif, Dylan; Bluestein, Howard B.; Lewellen, David C. (2022-06-01). "The Dodge City Tornadoes on 24 May 2016: Understanding Cycloidal Marks in Surface Damage Tracks and Further Analysis of the Debris Cloud". Monthly Weather Review 150: 1233–1246. doi:10.1175/MWR-D-21-0262.1. ISSN 0027-0644. https://ui.adsabs.harvard.edu/abs/2022MWRv..150.1233W/abstract.
5. ↑ Schultz, Isaac (2024-11-25). "Researchers Pinpoint Cause of Strange Scar in Australian Outback" (in en-US). https://gizmodo.com/researchers-pinpoint-cause-of-strange-scar-in-australian-outback-2000529646.
6. ↑ "PIA04564: Cycloidal Dust Devil Track". https://photojournal.jpl.nasa.gov/catalog/PIA04564.
7. ↑ "Cycloidal Dust Devil Track" (in en-US). https://www.jpl.nasa.gov/images/pia04564-cycloidal-dust-devil-track/.

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