Louisa County, Iowa tornadoes

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17confirmed tornadoes since NOAA records began in 1950 (the first here in 1954). Most recent: April 16, 2024, EF2. 2026 so far: 2 preliminary reports preliminary

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Map

Every tornado path in the county

Tornado paths, 1950 to 2025
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(E)F0(E)F1(E)F2(E)F3(E)F4(E)F5Unrated

Each path is a straight line from where the tornado started to where it ended, which is all most NOAA records hold. Tap a path for its details.

Recent warnings

Recent warnings in Louisa County

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The record

At a glance

Total171950 to 2025
Per year0.2average since 1950
Peak monthMay6 of 17
StrongestEF3Jun 1, 2007
Deaths0whole paths, see note
Injuries10whole paths, see note

Deaths and injuries are NOAA's totals for each tornado's whole path, which can extend beyond Louisa County.

Seasons

When tornadoes hit here

By month

60 Jan: 2Feb: 0Mar: 1Apr: 4May: 6Jun: 4Jul: 0Aug: 0Sep: 0Oct: 0Nov: 0Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

May is the peak month, with 6 of 17 tornadoes.

By time of day

50 12 AM: 0: 0: 03 AM: 0: 0: 06 AM: 0: 0: 09 AM: 0: 0: 112 PM: 0: 1: 03 PM: 4: 5: 26 PM: 1: 1: 09 PM: 1: 0: 112 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 4:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

20 1950: 0: 0: 0: 0: 1: 0: 0: 0: 0: 01960: 0: 0: 0: 0: 0: 0: 0: 2: 0: 01970: 1: 0: 0: 0: 0: 0: 0: 1: 0: 01980: 0: 1: 0: 1: 0: 0: 0: 1: 0: 01990: 0: 0: 0: 1: 0: 0: 0: 0: 2: 02000: 0: 0: 0: 2: 0: 0: 0: 1: 0: 02010: 0: 0: 0: 0: 0: 0: 1: 1: 0: 02020: 0: 0: 0: 0: 1: 019501960197019801990200020102020

The line is the five-year average. Tornadoes before about 1953 were under-reported, and better radar since the 1990s finds more weak ones. This year so far: 2 preliminary reports.

By rating

EF0
5
EF1
5
EF2
6
EF3
1

Ratings before February 2007 use the original F scale; the numbers line up with today's EF scale. Unknown means NOAA could not assign a rating.

The record

Notable tornadoes

Strongest

EF3, June 1, 2007

15.75 mile path Longest path

103.5 miles, F0

April 3, 1981, whole path Widest

880 yards, F0

April 30, 2003
Every tornado

All 17 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Apr 16, 2024EF241.66 mi600 yd00
Mar 6, 2017EF20.31 mi150 yd00
May 9, 2016EF00.09 mi10 yd00
Jun 1, 2007EF315.75 mi774 yd07
May 10, 2003F127.9 mi200 yd00
Apr 30, 2003F016 mi880 yd00
Jun 18, 1998F00.1 mi30 yd00
Jun 18, 1998F11 mi100 yd01
Jun 8, 1993F15 mi40 yd00
May 20, 1987F125 mi27 yd00
May 1, 1983F00.1 mi10 yd00
Apr 3, 1981F0103.5 mi50 yd00
May 4, 1977F10.1 mi20 yd00
May 9, 1970F21 mi100 yd00
Jan 24, 1967F22 mi150 yd01
Jan 24, 1967F23 mi250 yd00
Apr 30, 1954F285.2 mi200 yd01
This year

2026 preliminary reports not yet confirmed

Report dateLocationRating
Aug 19, 20262 E MarshNot yet rated
Aug 19, 20262 E MarshNot yet rated

Preliminary reports from the Storm Prediction Center. One tornado can be reported more than once, and NOAA confirms the final record months later.

Nearby

Nearby counties

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Source: NOAA Storm Prediction Center severe weather database, 1950 to 2025, and SPC preliminary reports for 2026. Page built October 13, 2026.