Johnson County tornado history

45 tornadoes touched Johnson County, Iowa between 1950 and 2025 — about 0.6 a year. The strongest was rated EF4 (Mar 31, 2023). Tornadoes here killed 4 and injured 92 people.

45tornadoes since 1950

EF4strongest rating

4killed · 92 injured

59 milongest path · 1988

(E)F0(E)F1(E)F2(E)F3(E)F4(E)F5· dots = start point only

By rating

(E)F012

(E)F120

(E)F211

(E)F31

(E)F41

(E)F50

By month

JFMAMJJASOND

Peak month: April.

By decade

’50’60’70’80’90’00’10’20

Strongest tornadoes

Date	Rating	Path	Width	Injured	Killed
Mar 31, 2023	EF4	19.9 mi	700 yd	3	0
May 15, 1998	F3	47 mi	400 yd	47	0
May 22, 1962	F2	4.1 mi	800 yd	0	1
May 8, 1988	F2	59 mi	60 yd	0	0
May 8, 1988	F2	36 mi	60 yd	0	0
Jun 7, 1984	F2	24 mi	200 yd	1	0
Mar 31, 2023	EF2	16.9 mi	75 yd	2	0
Mar 31, 2023	EF2	14.7 mi	100 yd	0	0
Mar 22, 1991	F2	14 mi	80 yd	0	0
Apr 21, 1973	F2	13.2 mi	10 yd	6	0
Mar 31, 2023	EF2	9 mi	75 yd	0	0
Sep 12, 1991	F2	7 mi	70 yd	0	0

Most recent tornadoes

Date	Rating	Path	Width	Injured
May 24, 2024	EF1	18.3 mi	100 yd	0
May 24, 2024	EF1	22.5 mi	150 yd	0
May 24, 2024	EF1	15 mi	75 yd	0
May 24, 2024	EF0	0.1 mi	50 yd	0
Mar 31, 2023	EF4	19.9 mi	700 yd	3
Mar 31, 2023	EF0	6.1 mi	50 yd	0
Mar 31, 2023	EF2	16.9 mi	75 yd	2
Mar 31, 2023	EF2	14.7 mi	100 yd	0
Mar 31, 2023	EF2	9 mi	75 yd	0
May 23, 2020	EF1	7 mi	50 yd	0
May 29, 2019	EF0	0.3 mi	20 yd	0
May 24, 2019	EF1	10.8 mi	75 yd	0

Deadliest: Apr 27, 2014, EF1, 2 killed.

Nearby counties

Iowa County, IA36 Washington County, IA25 Cedar County, IA44 Muscatine County, IA39 Linn County, IA66 Louisa County, IA17 Benton County, IA48 Keokuk County, IA33

Questions

How many tornadoes has Johnson County, Iowa had?

45 tornadoes touched Johnson County, Iowa between 1950 and 2025 in the NOAA Storm Prediction Center database — about 0.6 per year.

What was the strongest tornado in Johnson County?

The strongest rating recorded was EF4 on Mar 31, 2023, with a 19.9-mile path.

When is tornado season in Johnson County?

Most of its tornadoes happened in April (14 of 45). Tornadoes can occur in any month, so keep alerts on year-round.

Right now: live tornado warnings map · alerts for your location. Dates link to that day’s full storm reports where available (2004 onward).