Tornado History Map

Union County, Iowa tornado history

42 tornadoes recorded in or across Union County from 1962 to 2025, coloured by rating on the map.

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Years1950 to 2025
Rating (F or EF scale)

Shows tornadoes that started in, or crossed, the chosen state. To see how many have passed near you, search a town or ZIP code, or tap the map.

Key
  • F0 / EF0 Light damage
  • F1 / EF1 Moderate damage
  • F2 / EF2 Considerable damage
  • F3 / EF3 Severe damage
  • F4 / EF4 Devastating damage
  • F5 / EF5 Incredible damage
  • Unknown Not rated (2007 onwards)

How to read the lines. Each line is one tornado, drawn from where it started to where it ended, coloured and sized by its rating. A dot means the record has no end point. Tap a line for its details, or tap anywhere else to see how many tornadoes have passed nearby. Weaker tornadoes appear as you zoom in. Ratings use the Fujita (F) scale before 1 February 2007 and the Enhanced Fujita (EF) scale from then on.

Tornadoes in Union County

The Storm Prediction Center records 42 tornadoes whose paths touched Union County, Iowa between 1962 and 2025. None of them is recorded as having killed anyone. The busiest month is April, with 13 tornadoes. The strongest was an F4 on 27 May 1995. The most recent was on 17 April 2025.

  • 42tornadoes
  • 0deaths
  • 9injuries
  • 991per 10,000 sq mi of land

A tornado that crossed several counties counts in each one, so county counts add up to more than the state's.

How strong were the tornadoes in Union County?

RatingTornadoesShare
F0 / EF01843%
F1 / EF11229%
F2 / EF2717%
F3 / EF325%
F4 / EF437%
F5 / EF500%
Unknown rating00%

Union County tornadoes over time

Tornadoes by decade
Bar chart of tornadoes by period. The most is 10 in 2000s.1960s31970s51980s61990s42000s102010s52020s9

The 2020s only run to 2025, so that bar is for a shorter period. The record starts in 1950.

Show the numbers
PeriodCount
1960s3
1970s5
1980s6
1990s4
2000s10
2010s5
2020s9
Tornadoes by month
Bar chart of tornadoes by period. The most is 13 in Apr.Jan0Feb0Mar6Apr13May7Jun10Jul2Aug0Sep2Oct1Nov1Dec0
Show the numbers
PeriodCount
Jan0
Feb0
Mar6
Apr13
May7
Jun10
Jul2
Aug0
Sep2
Oct1
Nov1
Dec0

Records for Union County

  • Strongest: Creston, Iowa tornado27 May 1995, F4, 2 injuries, 57 miles long
  • Longest path: Missouri tornado11 April 2001, F3, 76.5 miles long
  • Most recent: Iowa tornado17 April 2025, EF1, 4.3 miles long

Notable tornadoes in Union County

Many of these tornadoes killed or injured people. The numbers are the official record's, and they may be revised.

More in Iowa

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