Tornado History Map

Alexander County, Illinois tornado history

17 tornadoes recorded in or across Alexander County from 1957 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 Alexander County

The Storm Prediction Center records 17 tornadoes whose paths touched Alexander County, Illinois between 1957 and 2025. None of them is recorded as having killed anyone. The busiest month is April, with 7 tornadoes. The strongest was an F2 on 6 May 2003. The most recent was on 2 April 2025.

  • 17tornadoes
  • 0deaths
  • 14injuries
  • 722per 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 Alexander County?

RatingTornadoesShare
F0 / EF0424%
F1 / EF1847%
F2 / EF2529%
F3 / EF300%
F4 / EF400%
F5 / EF500%
Unknown rating00%

Alexander County tornadoes over time

Tornadoes by decade
Bar chart of tornadoes by period. The most is 4 in 1970s.1950s11960s11970s41980s11990s12000s32010s42020s2

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

Show the numbers
PeriodCount
1950s1
1960s1
1970s4
1980s1
1990s1
2000s3
2010s4
2020s2
Tornadoes by month
Bar chart of tornadoes by period. The most is 7 in Apr.Jan2Feb0Mar2Apr7May2Jun0Jul2Aug0Sep0Oct2Nov0Dec0
Show the numbers
PeriodCount
Jan2
Feb0
Mar2
Apr7
May2
Jun0
Jul2
Aug0
Sep0
Oct2
Nov0
Dec0

Records for Alexander County

  • Strongest: Illinois tornado6 May 2003, F2, 1 injury, 25 miles long
  • Longest path: Illinois tornado18 January 1973, F1, 95.9 miles long
  • Most recent: Missouri tornado2 April 2025, EF1, 8 miles long

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

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