Tornado History Map

Sioux County, Iowa tornado history

63 tornadoes recorded in or across Sioux County from 1951 to 2024, 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 Sioux County

The Storm Prediction Center records 63 tornadoes whose paths touched Sioux County, Iowa between 1951 and 2024. None of them is recorded as having killed anyone. The busiest month is May, with 19 tornadoes. The strongest was an F3 on 31 May 1971. The most recent was on 31 May 2024.

  • 63tornadoes
  • 0deaths
  • 3injuries
  • 820per 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 Sioux County?

RatingTornadoesShare
F0 / EF03556%
F1 / EF11625%
F2 / EF2711%
F3 / EF335%
F4 / EF400%
F5 / EF500%
Unknown rating23%

Sioux County tornadoes over time

Tornadoes by decade
Bar chart of tornadoes by period. The most is 16 in 2000s.1950s41960s51970s51980s41990s92000s162010s132020s7

The 2020s only run to 2024, so that bar is for a shorter period. The record starts in 1950.

Show the numbers
PeriodCount
1950s4
1960s5
1970s5
1980s4
1990s9
2000s16
2010s13
2020s7
Tornadoes by month
Bar chart of tornadoes by period. The most is 19 in May.Jan0Feb0Mar1Apr8May19Jun13Jul8Aug6Sep4Oct3Nov1Dec0
Show the numbers
PeriodCount
Jan0
Feb0
Mar1
Apr8
May19
Jun13
Jul8
Aug6
Sep4
Oct3
Nov1
Dec0

Records for Sioux County

  • Strongest and Longest path: Iowa tornado31 May 1971, F3, 46.5 miles long
  • Most recent: Iowa tornado31 May 2024, EF0, 0.7 miles long

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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