Story County tornado history

66 tornadoes touched Story County, Iowa between 1950 and 2025 — about 0.9 a year. The strongest was rated F5 (Jun 13, 1976). Tornadoes here killed 1 and injured 47 people.

66tornadoes since 1950

F5strongest rating

1killed · 47 injured

116.1 milongest path · 1953

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

By rating

(E)F025

(E)F123

(E)F211

(E)F34

(E)F41

(E)F51

unrated1

By month

JFMAMJJASOND

Peak month: June.

By decade

’50’60’70’80’90’00’10’20

Strongest tornadoes

Date	Rating	Path	Width	Injured	Killed
Jun 13, 1976	F5	21.3 mi	880 yd	9	0
May 24, 1989	F4	66 mi	150 yd	0	0
May 20, 1953	F3	116.1 mi	400 yd	0	1
Mar 22, 1991	F3	43 mi	70 yd	0	0
Mar 13, 1990	F3	9 mi	100 yd	1	0
Jun 15, 1950	F3	5.6 mi	300 yd	5	0
May 21, 2024	EF2	40.8 mi	1,000 yd	4	0
May 31, 1959	F2	17 mi	440 yd	0	0
Mar 13, 1990	F2	15 mi	60 yd	15	0
Jun 8, 1967	F2	14.4 mi	100 yd	0	0
Nov 12, 2005	F2	12 mi	100 yd	1	0
Aug 26, 1965	F2	4.9 mi	100 yd	2	0

Most recent tornadoes

Date	Rating	Path	Width	Injured
Jul 19, 2025	unrated	4.5 mi	40 yd	0
May 21, 2024	EF2	40.8 mi	1,000 yd	4
Apr 23, 2022	EF1	9.1 mi	80 yd	0
Jul 19, 2018	EF0	2.1 mi	40 yd	0
Jul 19, 2018	EF0	2.8 mi	60 yd	0
Jul 19, 2018	EF0	2.5 mi	40 yd	0
May 29, 2018	EF0	0.3 mi	30 yd	0
Aug 21, 2017	EF0	3.3 mi	80 yd	0
Aug 21, 2017	EF0	1.1 mi	10 yd	0
Mar 6, 2017	EF0	17.9 mi	85 yd	0
Jun 7, 2015	EF1	0.9 mi	35 yd	0
Jun 30, 2014	EF1	12 mi	460 yd	0

Deadliest: May 20, 1953, F3, 1 killed.

Nearby counties

Boone County, IA58 Marshall County, IA39 Polk County, IA70 Hardin County, IA47 Hamilton County, IA56 Jasper County, IA47 Dallas County, IA60 Grundy County, IA39

Questions

How many tornadoes has Story County, Iowa had?

66 tornadoes touched Story County, Iowa between 1950 and 2025 in the NOAA Storm Prediction Center database — about 0.9 per year.

What was the strongest tornado in Story County?

The strongest rating recorded was F5 on Jun 13, 1976, with a 21.3-mile path.

When is tornado season in Story County?

Most of its tornadoes happened in June (22 of 66). 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).