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Anticyclonic tornado

October 27, 2023

An anticyclonic tornado is a tornado which rotates in a clockwise direction in the Northern Hemisphere and a counterclockwise direction in the Southern Hemisphere.[1] The term is a naming convention denoting the anomaly from normal rotation which is cyclonic in upwards of 98 percent of tornadoes.[citation needed] Many anticyclonic tornadoes are smaller and weaker than cyclonic tornadoes, forming from a different process, as either companion/satellite tornadoes or nonmesocyclonic tornadoes.[2]

An anticyclonic tornado near Big Spring, Texas on May 22, 2016 captured by storm chaser Aaron Jayjack.

Formation edit

Most strong tornadoes form in the inflow and updraft area bordering the updraft-downdraft interface (which is also near the mesoscale "triple point") zone of supercell thunderstorms. The thunderstorm itself is rotating, with a rotating updraft known as a mesocyclone, and then a smaller area of rotation at lower altitude the tornadocyclone (or low-level mesocyclone) which produces or enables the smaller rotation that is a tornado. All of these may be quasi-vertically aligned continuing from the ground to the mid-upper levels of the storm. All of these cyclones and scaling all the way up to large extratropical (low-pressure systems) and tropical cyclones rotate cyclonically. Rotation in these synoptic scale systems stems partly from the Coriolis effect, but thunderstorms and tornadoes are too small to be significantly affected. The common property here is an area of lower pressure, thus surrounding air flows into the area of less dense air forming cyclonic rotation. The rotation of the thunderstorm itself is induced mostly by vertical wind shear, specifically clockwise turning as altitude increases (called a veered vertical profile, although backed profiles can occur with anticyclonic supercells).

Various processes can produce an anticyclonic tornado. Most often they are satellite tornadoes of larger tornadoes which are directly associated with the tornadocyclone and mesocyclone. Occasionally anticyclonic tornadoes occur as an anticyclonic companion (mesoanticyclone) to a mesocyclone within a single storm. Anticyclonic tornadoes can occur as the primary tornado with a mesocyclone and under a rotating wall cloud. Also, anticyclonic supercells (with mesoanticyclone), which usually are storms that split and move to the left of the parent storm motion, though very rarely spawning tornadoes, spawn anticyclonic tornadoes. There is an increased incidence of anticyclonic tornadoes associated with tropical cyclones, and mesovortices within bow echoes may spawn anticyclonic tornadoes.[3]

The first anticyclonic tornado associated with a mesoanticyclone was spotted on WSR-88D weather radar in Sunnyvale, California on May 4, 1998. The tornado was an F2 on the Fujita Scale.[4]

Known "anticyclonic tornado" events edit

Date F#/EF# Rating Location Notes and References
8 June 1951 F3 Corn, Oklahoma First known tornado filmed in the US, a companion or cyclic tornado to another significant tornado. It is officially listed as one tornado event by the CDNS report and the NCDC.[5][6]
6 June 1975 F1 Freedom, Oklahoma One of three tornadoes to touch down in the area.[7][8][9]
13 June 1976 F3 Jordan, Iowa Tornadoes of 1976#June 13 – A satellite tornado to the F5 Jordan, Iowa tornado.[10][11]
3 June 1980 F1 Grand Island, Nebraska 1980 Grand Island tornado outbreak – First of three anticyclonic tornadoes in the area that night.[12][13]
3 June 1980 F3 Grand Island, Nebraska 1980 Grand Island tornado outbreak – Second of three anticyclonic tornadoes in the area that night.[12][14]
3 June 1980 F1 Grand Island, Nebraska 1980 Grand Island tornado outbreak – Last of three anticyclonic tornadoes in the area that night.[12][15]
4 April 1981 F4 West Bend, Wisconsin 1981 West Bend tornado – Strongest anticyclonic tornado ever recorded.[16]
13 June 1998 F2 North Oklahoma City, Oklahoma Tornado outbreak of June 13, 1998 – Sixth of seven tornadoes to touch down from the same supercell.[17][18]
19 April 2002 F0 Lubbock, Texas "The tornado was produced by an antimesocyclone, which was located on the north flank of a left-split storm."[19]
6 September 2004 F? Chek-Lap-Kok International Airport, Hong Kong Described as a marginal tornado.[20]
24 April 2006 F1 El Reno, Oklahoma Second of two F1 tornadoes in the area.[21][2]
20 June 2006 F1 Rushville, Nebraska A house, sheds, and outbuildings were destroyed on a farmstead.[22]
2 October 2007 EF0 Bussey, Iowa Tornadoes of 2007#October 2 – This brief anticyclonic touched down in an open field southeast of Bussey, doing no damage.[23]
10 May 2010 EF0 Nardin, Oklahoma Tornado outbreak of May 10–13, 2010 – First of five anticyclonic on this day.[24][25]
10 May 2010 EF1 Bray, Oklahoma Tornado outbreak of May 10–13, 2010 – Second of five anticyclonic tornadoes on this day; was very large at times.[24][26]
10 May 2010 EF1 Southern Norman, Oklahoma Tornado outbreak of May 10–13, 2010 – Third of five anticyclonic tornadoes on this day; it was likely a satellite tornado to the Norman–Little Axe, Oklahoma EF4 tornado.[24][27]
10 May 2010 EF1 Wayne, Oklahoma Tornado outbreak of May 10–13, 2010 – Fourth of five anticyclonic tornadoes on this day; was up to a 1⁄2 mi (0.80 km) wide and was briefly accompanied by a cyclonic EF0 satellite tornado.[24][28]
10 May 2010 EF1 Lake Eufaula, Oklahoma Tornado outbreak of May 10–13, 2010 – Last of five anticyclonic tornadoes on this day; was up to a 5⁄8 mi (1.0 km) wide.[24][29]
31 May 2013 EF2 Yukon, Oklahoma Tornado outbreak of May 26–31, 2013 – A long-lived strong satellite tornado that was southeast of the record-breaking EF3 El Reno tornado.[30][31]
4 June 2015 EF0 Simla, Colorado Tornadoes of 2015#June 4 – A brief anticyclonic tornado caused no damage.[32][33]
4 June 2015 EF0 Kutch, Colorado Tornadoes of 2015#June 4 – A brief anticyclonic tornado caused no damage.[32][34]
31 March 2016 EF0 Hohenwald, Tennessee Tornadoes of 2016#March 30–April 1 – A brief anticyclonic tornado snapped and uprooted trees, downed several large tree branches and inflicted minor roof damage to a home and barn.[35][36]
5 April 2017 EF1 Shelbyville, Tennessee Tornadoes of 2017#April 4–6 – A landspout anticyclonic tornado snapped damaged trees, cars, and structures.[37][38]
15 June 2019 EF0 Johnsonville, South Dakota Tornadoes of 2019#June 15–16 – This tornado lasted approximately 45 seconds and damaged about seven trees.[39][40][41][42]
29 July 2021 EF0 Bustleton, Philadelphia, Pennsylvania Tornado outbreak of July 28–29, 2021 – A weak tornado damaged buildings and trees.[43]
27 August 2021 EF0 Dougherty, Iowa "This very brief track was found in Sentinel satellite imagery and stayed in fields for its existence. Based on the location in the supercell, inflow wind trajectories along the left side of the track, and striation patterns in the fields, there is a high likelihood that this was an anti-cyclonic tornado."[44]

See also edit

References edit

  1. ^ Edwards, Roger. "The Online Tornado FAQ". NWS Storm Prediction Center. Retrieved 2019-05-02.
  2. ^ a b Samenow, Jason (5 June 2013). "The rare "anticyclonic" tornado in El Reno, Okla.; not its first encounter". The Washington Post. Retrieved 9 April 2019.
  3. ^ Stull, Roland B. (2000). Meteorology for Scientists and Engineers (2nd ed.). Thomson Learning. ISBN 9780534372149.
  4. ^ Monteverdi, John P.; Blier, Warren; Stumpf, Greg; Pi, Wilfred; Anderson, Karl (November 2001). "First WSR-88D Documentation of an Anticyclonic Supercell with Anticyclonic Tornadoes: The Sunnyvale–Los Altos, California, Tornadoes of 4 May 1998". Monthly Weather Review. 129 (11): 2805–2814. Bibcode:2001MWRv..129.2805M. doi:10.1175/1520-0493(2001)129<2805:FWDOAA>2.0.CO;2. S2CID 35163346.
  5. ^ "Oklahoma Event Report: F3 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  6. ^ Grazulis, Thomas (2003). The Tornado Natures Ultimate Windstorm. Norman, OK: University of Oklahoma Press. p. 237. ISBN 9780806135380. Retrieved 2 June 2020.
  7. ^ "Oklahoma Event Report: F1 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022."Oklahoma Event Report: F1 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022."Oklahoma Event Report: F1 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  8. ^ "Freedom, Oklahoma Anticyclonic Tornado - June 6, 1975". Youtube. cyclonejimcom. Archived from the original on 2021-12-21. Retrieved 9 April 2019.
  9. ^ Grazulis, Thomas P. "Twister: Fury on the Plains (1995)". imdb. Music Video Productions (co-production); The Tornado Project. Retrieved 9 April 2019.
  10. ^ "Iowa Event Report: F3 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  11. ^ Brown, John M.; Knupp, Kevin R. (October 1980). "The Iowa Cyclonic-Anticyclonic Tornado Pair and Its Parent Thunderstorm". Monthly Weather Review. 108 (10): 1626–1646. Bibcode:1980MWRv..108.1626B. doi:10.1175/1520-0493(1980)108<1626:TICATP>2.0.CO;2.
  12. ^ a b c "NWS Hastings: June 3, 1980 Grand Island Tornadoes". NWS. Retrieved April 18, 2019.
  13. ^ "Nebraska Event Report: F1 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  14. ^ "Nebraska Event Report: F3 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022."Nebraska Event Report: F3 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  15. ^ "Nebraska Event Report: F1 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022."Nebraska Event Report: F1 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  16. ^ "Wisconsin Event Report: F4 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  17. ^ "Oklahoma Event Report: F2 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  18. ^ Morgan, Mike (13 June 2020). "June 13, 1998: Rare OKC twister defies nature, spins clockwise". Oklahomas News 4. KFOR. Retrieved 15 June 2020.
  19. ^ "Texas Event Report: F0 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  20. ^ Kosiba, Karen A.; Robinson, Paul; Chan, P. W.; Wurman, Joshua (2014). "Wind Field of a Nonmesocyclone Anticyclonic Tornado Crossing the Hong Kong International Airport". Advances in Meteorology. Hindawi. 2014 (597378): 1–7. doi:10.1155/2014/597378.
  21. ^ "Oklahoma Event Report: F1 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  22. ^ "Nebraska Event Report: F1 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  23. ^ "Iowa Event Report: EF0 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 10 June 2022.
  24. ^ a b c d e "The May 10, 2010 Tornado Outbreak in Oklahoma". National Weather Service Forecast Office - Norman, Oklahoma. 2010. Retrieved 2019-05-02.
  25. ^ "Oklahoma Event Report: EF0 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  26. ^ "Oklahoma Event Report: EF1 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022."Oklahoma Event Report: EF1 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  27. ^ "Oklahoma Event Report: EF1 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  28. ^ "Oklahoma Event Report: EF1 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  29. ^ "Oklahoma Event Report: EF1 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  30. ^ "Oklahoma Event Report: EF2 Tornado". National Centers for Environmental Information. National Weather Service. Retrieved 25 May 2022.
  31. ^ Norman, N. W. S. (2013-06-04). "The tornado count for May 31 will rise as analysis continues, including an anticyclonic EF2 tornado SE of the El Reno tornado. #okwx". @NWSNorman. Retrieved 2019-09-24.
  32. ^ a b "Storm Damage Surveys for June 4th Tornadoes". Denver/Boulder, CO Weather Forecast Office. Retrieved 10 April 2019.
  33. ^ Colorado Event Report: EF0 Tornado (Report). National Climatic Data Center. National Weather Service Weather Forecast Office in Boulder, Colorado. 2015. Retrieved November 3, 2015.
  34. ^ Colorado Event Report: EF0 Tornado (Report). National Climatic Data Center. National Weather Service Weather Forecast Office in Boulder, Colorado. 2015. Retrieved November 3, 2015.
  35. ^ Tennessee Event Report: EF0 Tornado (Report). National Centers for Environmental Information. National Weather Service Weather Forecast Office in Nashville, Tennessee. 2016. Retrieved November 30, 2016.
  36. ^ "March 31, 2016 Tornadoes". National Weather Service.
  37. ^ Edwards, Christina (7 April 2017). "A "very unique event": Rare anticyclonic tornado touched down in southeastern Tennessee Wednesday". WHNT News (Channel 9 FOX). Retrieved 10 April 2019.
  38. ^ Tennessee Event Report: EF0 Tornado (Report). National Centers for Environmental Information. National Weather Service Weather Forecast Office in Nashville, Tennessee. 2017. Retrieved November 2, 2017.
  39. ^ South Dakota Event Report: EF0 Tornado (Report). National Centers for Environmental Information. National Weather Service Weather Forecast Office in Aberdeen, South Dakota. 2019. Retrieved January 12, 2020.
  40. ^ Donegan, Brian. "A Rare Clockwise-Rotating Tornado Touched Down in South Dakota Last Weekend". Weather.com. Weather.com. Retrieved 19 June 2019.
  41. ^ Bates, Becky (19 June 2019). "Rare clockwise-spinning tornado touches down in South Dakota". KTVQ. KTVQ. Retrieved 19 June 2019.
  42. ^ Smith, Grant. "Rare anticyclonic tornado spotted in Deuel County". KELO. KELO. Retrieved 19 June 2019.
  43. ^ Storm Events Database July 29, 2021 (Report). National Centers for Environmental Information. National Centers for Environmental Information. Retrieved November 6, 2021.
  44. ^ Storm Events Database August 27, 2021 (Report). National Centers for Environmental Information. National Centers for Environmental Information. Retrieved November 20, 2021.

External links edit

  • Tornadic Meso-anticyclonic supercell in Sunnyvale California (NSSL)

October 27, 2023
anticyclonic, tornado, anticyclonic, tornado, tornado, which, rotates, clockwise, direction, northern, hemisphere, counterclockwise, direction, southern, hemisphere, term, naming, convention, denoting, anomaly, from, normal, rotation, which, cyclonic, upwards,. An anticyclonic tornado is a tornado which rotates in a clockwise direction in the Northern Hemisphere and a counterclockwise direction in the Southern Hemisphere 1 The term is a naming convention denoting the anomaly from normal rotation which is cyclonic in upwards of 98 percent of tornadoes citation needed Many anticyclonic tornadoes are smaller and weaker than cyclonic tornadoes forming from a different process as either companion satellite tornadoes or nonmesocyclonic tornadoes 2 An anticyclonic tornado near Big Spring Texas on May 22 2016 captured by storm chaser Aaron Jayjack Contents 1 Formation 2 Known anticyclonic tornado events 3 See also 4 References 5 External linksFormation editMost strong tornadoes form in the inflow and updraft area bordering the updraft downdraft interface which is also near the mesoscale triple point zone of supercell thunderstorms The thunderstorm itself is rotating with a rotating updraft known as a mesocyclone and then a smaller area of rotation at lower altitude the tornadocyclone or low level mesocyclone which produces or enables the smaller rotation that is a tornado All of these may be quasi vertically aligned continuing from the ground to the mid upper levels of the storm All of these cyclones and scaling all the way up to large extratropical low pressure systems and tropical cyclones rotate cyclonically Rotation in these synoptic scale systems stems partly from the Coriolis effect but thunderstorms and tornadoes are too small to be significantly affected The common property here is an area of lower pressure thus surrounding air flows into the area of less dense air forming cyclonic rotation The rotation of the thunderstorm itself is induced mostly by vertical wind shear specifically clockwise turning as altitude increases called a veered vertical profile although backed profiles can occur with anticyclonic supercells Various processes can produce an anticyclonic tornado Most often they are satellite tornadoes of larger tornadoes which are directly associated with the tornadocyclone and mesocyclone Occasionally anticyclonic tornadoes occur as an anticyclonic companion mesoanticyclone to a mesocyclone within a single storm Anticyclonic tornadoes can occur as the primary tornado with a mesocyclone and under a rotating wall cloud Also anticyclonic supercells with mesoanticyclone which usually are storms that split and move to the left of the parent storm motion though very rarely spawning tornadoes spawn anticyclonic tornadoes There is an increased incidence of anticyclonic tornadoes associated with tropical cyclones and mesovortices within bow echoes may spawn anticyclonic tornadoes 3 The first anticyclonic tornado associated with a mesoanticyclone was spotted on WSR 88D weather radar in Sunnyvale California on May 4 1998 The tornado was an F2 on the Fujita Scale 4 Known anticyclonic tornado events editThis list is incomplete you can help by adding missing items May 2022 Date F EF Rating Location Notes and References8 June 1951 F3 Corn Oklahoma First known tornado filmed in the US a companion or cyclic tornado to another significant tornado It is officially listed as one tornado event by the CDNS report and the NCDC 5 6 6 June 1975 F1 Freedom Oklahoma One of three tornadoes to touch down in the area 7 8 9 13 June 1976 F3 Jordan Iowa Tornadoes of 1976 June 13 A satellite tornado to the F5 Jordan Iowa tornado 10 11 3 June 1980 F1 Grand Island Nebraska 1980 Grand Island tornado outbreak First of three anticyclonic tornadoes in the area that night 12 13 3 June 1980 F3 Grand Island Nebraska 1980 Grand Island tornado outbreak Second of three anticyclonic tornadoes in the area that night 12 14 3 June 1980 F1 Grand Island Nebraska 1980 Grand Island tornado outbreak Last of three anticyclonic tornadoes in the area that night 12 15 4 April 1981 F4 West Bend Wisconsin 1981 West Bend tornado Strongest anticyclonic tornado ever recorded 16 13 June 1998 F2 North Oklahoma City Oklahoma Tornado outbreak of June 13 1998 Sixth of seven tornadoes to touch down from the same supercell 17 18 19 April 2002 F0 Lubbock Texas The tornado was produced by an antimesocyclone which was located on the north flank of a left split storm 19 6 September 2004 F Chek Lap Kok International Airport Hong Kong Described as a marginal tornado 20 24 April 2006 F1 El Reno Oklahoma Second of two F1 tornadoes in the area 21 2 20 June 2006 F1 Rushville Nebraska A house sheds and outbuildings were destroyed on a farmstead 22 2 October 2007 EF0 Bussey Iowa Tornadoes of 2007 October 2 This brief anticyclonic touched down in an open field southeast of Bussey doing no damage 23 10 May 2010 EF0 Nardin Oklahoma Tornado outbreak of May 10 13 2010 First of five anticyclonic on this day 24 25 10 May 2010 EF1 Bray Oklahoma Tornado outbreak of May 10 13 2010 Second of five anticyclonic tornadoes on this day was very large at times 24 26 10 May 2010 EF1 Southern Norman Oklahoma Tornado outbreak of May 10 13 2010 Third of five anticyclonic tornadoes on this day it was likely a satellite tornado to the Norman Little Axe Oklahoma EF4 tornado 24 27 10 May 2010 EF1 Wayne Oklahoma Tornado outbreak of May 10 13 2010 Fourth of five anticyclonic tornadoes on this day was up to a 1 2 mi 0 80 km wide and was briefly accompanied by a cyclonic EF0 satellite tornado 24 28 10 May 2010 EF1 Lake Eufaula Oklahoma Tornado outbreak of May 10 13 2010 Last of five anticyclonic tornadoes on this day was up to a 5 8 mi 1 0 km wide 24 29 31 May 2013 EF2 Yukon Oklahoma Tornado outbreak of May 26 31 2013 A long lived strong satellite tornado that was southeast of the record breaking EF3 El Reno tornado 30 31 4 June 2015 EF0 Simla Colorado Tornadoes of 2015 June 4 A brief anticyclonic tornado caused no damage 32 33 4 June 2015 EF0 Kutch Colorado Tornadoes of 2015 June 4 A brief anticyclonic tornado caused no damage 32 34 31 March 2016 EF0 Hohenwald Tennessee Tornadoes of 2016 March 30 April 1 A brief anticyclonic tornado snapped and uprooted trees downed several large tree branches and inflicted minor roof damage to a home and barn 35 36 5 April 2017 EF1 Shelbyville Tennessee Tornadoes of 2017 April 4 6 A landspout anticyclonic tornado snapped damaged trees cars and structures 37 38 15 June 2019 EF0 Johnsonville South Dakota Tornadoes of 2019 June 15 16 This tornado lasted approximately 45 seconds and damaged about seven trees 39 40 41 42 29 July 2021 EF0 Bustleton Philadelphia Pennsylvania Tornado outbreak of July 28 29 2021 A weak tornado damaged buildings and trees 43 27 August 2021 EF0 Dougherty Iowa This very brief track was found in Sentinel satellite imagery and stayed in fields for its existence Based on the location in the supercell inflow wind trajectories along the left side of the track and striation patterns in the fields there is a high likelihood that this was an anti cyclonic tornado 44 See also edit nbsp Tornadoes portalVortex Vorticity Pressure gradient force PGF Rossby number Anticyclonic stormReferences edit Edwards Roger The Online Tornado FAQ NWS Storm Prediction Center Retrieved 2019 05 02 a b Samenow Jason 5 June 2013 The rare anticyclonic tornado in El Reno Okla not its first encounter The Washington Post Retrieved 9 April 2019 Stull Roland B 2000 Meteorology for Scientists and Engineers 2nd ed Thomson Learning ISBN 9780534372149 Monteverdi John P Blier Warren Stumpf Greg Pi Wilfred Anderson Karl November 2001 First WSR 88D Documentation of an Anticyclonic Supercell with Anticyclonic Tornadoes The Sunnyvale Los Altos California Tornadoes of 4 May 1998 Monthly Weather Review 129 11 2805 2814 Bibcode 2001MWRv 129 2805M doi 10 1175 1520 0493 2001 129 lt 2805 FWDOAA gt 2 0 CO 2 S2CID 35163346 Oklahoma Event Report F3 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Grazulis Thomas 2003 The Tornado Natures Ultimate Windstorm Norman OK University of Oklahoma Press p 237 ISBN 9780806135380 Retrieved 2 June 2020 Oklahoma Event Report F1 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Oklahoma Event Report F1 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Oklahoma Event Report F1 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Freedom Oklahoma Anticyclonic Tornado June 6 1975 Youtube cyclonejimcom Archived from the original on 2021 12 21 Retrieved 9 April 2019 Grazulis Thomas P Twister Fury on the Plains 1995 imdb Music Video Productions co production The Tornado Project Retrieved 9 April 2019 Iowa Event Report F3 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Brown John M Knupp Kevin R October 1980 The Iowa Cyclonic Anticyclonic Tornado Pair and Its Parent Thunderstorm Monthly Weather Review 108 10 1626 1646 Bibcode 1980MWRv 108 1626B doi 10 1175 1520 0493 1980 108 lt 1626 TICATP gt 2 0 CO 2 a b c NWS Hastings June 3 1980 Grand Island Tornadoes NWS Retrieved April 18 2019 Nebraska Event Report F1 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Nebraska Event Report F3 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Nebraska Event Report F3 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Nebraska Event Report F1 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Nebraska Event Report F1 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Wisconsin Event Report F4 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Oklahoma Event Report F2 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Morgan Mike 13 June 2020 June 13 1998 Rare OKC twister defies nature spins clockwise Oklahomas News 4 KFOR Retrieved 15 June 2020 Texas Event Report F0 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Kosiba Karen A Robinson Paul Chan P W Wurman Joshua 2014 Wind Field of a Nonmesocyclone Anticyclonic Tornado Crossing the Hong Kong International Airport Advances in Meteorology Hindawi 2014 597378 1 7 doi 10 1155 2014 597378 Oklahoma Event Report F1 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Nebraska Event Report F1 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Iowa Event Report EF0 Tornado National Centers for Environmental Information National Weather Service Retrieved 10 June 2022 a b c d e The May 10 2010 Tornado Outbreak in Oklahoma National Weather Service Forecast Office Norman Oklahoma 2010 Retrieved 2019 05 02 Oklahoma Event Report EF0 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Oklahoma Event Report EF1 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Oklahoma Event Report EF1 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Oklahoma Event Report EF1 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Oklahoma Event Report EF1 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Oklahoma Event Report EF1 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Oklahoma Event Report EF2 Tornado National Centers for Environmental Information National Weather Service Retrieved 25 May 2022 Norman N W S 2013 06 04 The tornado count for May 31 will rise as analysis continues including an anticyclonic EF2 tornado SE of the El Reno tornado okwx NWSNorman Retrieved 2019 09 24 a b Storm Damage Surveys for June 4th Tornadoes Denver Boulder CO Weather Forecast Office Retrieved 10 April 2019 Colorado Event Report EF0 Tornado Report National Climatic Data Center National Weather Service Weather Forecast Office in Boulder Colorado 2015 Retrieved November 3 2015 Colorado Event Report EF0 Tornado Report National Climatic Data Center National Weather Service Weather Forecast Office in Boulder Colorado 2015 Retrieved November 3 2015 Tennessee Event Report EF0 Tornado Report National Centers for Environmental Information National Weather Service Weather Forecast Office in Nashville Tennessee 2016 Retrieved November 30 2016 March 31 2016 Tornadoes National Weather Service Edwards Christina 7 April 2017 A very unique event Rare anticyclonic tornado touched down in southeastern Tennessee Wednesday WHNT News Channel 9 FOX Retrieved 10 April 2019 Tennessee Event Report EF0 Tornado Report National Centers for Environmental Information National Weather Service Weather Forecast Office in Nashville Tennessee 2017 Retrieved November 2 2017 South Dakota Event Report EF0 Tornado Report National Centers for Environmental Information National Weather Service Weather Forecast Office in Aberdeen South Dakota 2019 Retrieved January 12 2020 Donegan Brian A Rare Clockwise Rotating Tornado Touched Down in South Dakota Last Weekend Weather com Weather com Retrieved 19 June 2019 Bates Becky 19 June 2019 Rare clockwise spinning tornado touches down in South Dakota KTVQ KTVQ Retrieved 19 June 2019 Smith Grant Rare anticyclonic tornado spotted in Deuel County KELO KELO Retrieved 19 June 2019 Storm Events Database July 29 2021 Report National Centers for Environmental Information National Centers for Environmental Information Retrieved November 6 2021 Storm Events Database August 27 2021 Report National Centers for Environmental Information National Centers for Environmental Information Retrieved November 20 2021 External links editTornadic Meso anticyclonic supercell in Sunnyvale California NSSL Retrieved from https en wikipedia org w index php title Anticyclonic tornado amp oldid 1146804181, wikipedia, wiki, book, books, library,

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