Tornado History

Union Tornado History

This county-level tornado history page focuses on Union, Iowa. The records below identify 39 tornadoes from 1962 through 2025, including a highest listed rating of F4 (Devastating damage). NOAA damage estimates in this group total at least $36.6M, with 0 deaths and 5 injuries recorded across the listed events.

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39recorded tornadoes
F4 (Devastating damage)highest rating
$36.6Mminimum property damage
April 17, 2025latest tornado
33.5 milongest listed path
1500 ydwidest listed path

Historical Track Sketch

F4 May 24, 19891989F4 April 8, 19991999F3 March 29, 19791979EF2 April 14, 20122012EF2 April 26, 20242024EF2 April 26, 20242024F2 April 12, 19641964F2 April 11, 20012001EF2 April 26, 20242024F2 April 26, 19641964EF1 November 11, 20152015EF1 June 4, 20082008EF1 April 26, 20242024EF1 April 17, 20252025EF1 October 9, 2018F1 May 7, 1962F1 April 19, 1973EF1 June 5, 2008EF1 April 26, 2024F1 July 15, 1992EF1 June 4, 2008F0 September 11, 2003EF0 May 6, 2007F0 March 30, 2006F0 March 24, 1996EF0 June 4, 2008EF0 April 27, 2016EF0 May 21, 2024F0 June 24, 1987F0 July 3, 1983F0 May 7, 1975F0 June 16, 1985F0 June 26, 1985F0 June 26, 1985F0 March 30, 2006EF0 June 4, 2008EF0 March 22, 2011EFU March 5, 2022EFU May 21, 2024© OpenStreetMap contributors

Rating Breakdown

  • F4 (Devastating damage)2
  • F3 (Severe damage)1
  • F2 (Considerable damage)3
  • EF2 (Considerable damage)4
  • F1 (Moderate damage)3
  • EF1 (Moderate damage)8
  • F0 (Light damage)10
  • EF0 (Light damage)6
  • Unknown rating2

Most Active Years

  • 20247
  • 20085
  • 19853
  • 19642
  • 20062
  • 19621
  • 19731
  • 19751

Notable Tornado Records

The table highlights the strongest and most damaging records in this page's local dataset. Damage totals are NOAA-reported minimum estimates where available.

DateRatingAreaLengthWidthDeathsInjuriesMin. property damage
May 24, 1989F4Union, Iowa2 mi300 yd00$25.0M
April 8, 1999F4Union, Iowa12.5 mi1500 yd01$2.0M
March 29, 1979F3Union, Iowa33.5 mi500 yd02$2.5M
April 14, 2012EF2Union, Iowa16.05 mi800 yd02$5.0M
April 26, 2024EF2Union, Iowa6.65 mi130 yd00$500K
April 26, 2024EF2Union, Iowa8.1 mi350 yd00$300K
April 12, 1964F2Union, Iowa9.4 mi33 yd00$250K
April 11, 2001F2Union, Iowa11.5 mi150 yd00$150K
April 26, 2024EF2Union, Iowa12.51 mi150 yd00$100K
April 26, 1964F2Union, Iowa14.8 mi300 yd00$25K
November 11, 2015EF1Union, Iowa7.04 mi250 yd00$125K
June 4, 2008EF1Union, Iowa3.87 mi150 yd00$50K

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Source And Limits

Data source: NOAA/NCEI. TornadoTrace summarizes historical records for screening and research. Coordinates, damage estimates, narratives, and event details can be approximate, incomplete, revised, or missing. Do not use this page as legal, insurance, engineering, real estate, emergency management, or safety advice.