Marshall County tornado history

39 tornadoes touched Marshall County, Iowa between 1950 and 2025 — about 0.5 a year. The strongest was rated F4 (May 24, 1989). Tornadoes here killed 7 and injured 100 people.

39tornadoes since 1950

F4strongest rating

7killed · 100 injured

87.7 milongest path · 1961

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

By rating

(E)F013

(E)F115

(E)F24

(E)F34

(E)F41

(E)F50

unrated2

By month

JFMAMJJASOND

Peak month: June.

By decade

’50’60’70’80’90’00’10’20

Strongest tornadoes

Date	Rating	Path	Width	Injured	Killed
May 24, 1989	F4	66 mi	150 yd	0	0
Sep 16, 1978	F3	31.8 mi	200 yd	45	6
Apr 23, 1961	F3	87.7 mi	800 yd	12	1
Jul 19, 2018	EF3	8.4 mi	1,200 yd	22	0
Jun 1, 1951	F3	1.5 mi	880 yd	7	0
Apr 10, 1981	F2	5.6 mi	500 yd	9	0
Jun 11, 1969	F2	1 mi	100 yd	0	0
May 28, 1962	F2	0.1 mi	200 yd	5	0
Jun 6, 1969	F2	0.1 mi	200 yd	0	0
May 30, 1998	F1	22 mi	50 yd	0	0
Apr 11, 2001	F1	17.5 mi	45 yd	0	0
May 22, 2004	F1	17 mi	100 yd	0	0

Most recent tornadoes

Date	Rating	Path	Width	Injured
Aug 10, 2020	unrated	1 mi	50 yd	0
Aug 10, 2020	unrated	0.4 mi	50 yd	0
Aug 10, 2020	EF1	2.9 mi	100 yd	0
Mar 28, 2020	EF0	1.3 mi	75 yd	0
Jul 19, 2018	EF0	0.8 mi	40 yd	0
Jul 19, 2018	EF3	8.4 mi	1,200 yd	22
Nov 11, 2015	EF0	1.9 mi	100 yd	0
Jun 30, 2014	EF1	12 mi	460 yd	0
Jun 30, 2014	EF0	6.5 mi	150 yd	0
Jul 19, 2008	EF0	0.7 mi	25 yd	0
Jun 8, 2008	EF1	1 mi	75 yd	0
Sep 5, 2004	F1	3.5 mi	30 yd	0

Deadliest: Sep 16, 1978, F3, 6 killed.

Nearby counties

Tama County, IA47 Story County, IA66 Jasper County, IA47 Grundy County, IA39 Hardin County, IA47 Poweshiek County, IA33 Polk County, IA70 Hamilton County, IA56

Questions

How many tornadoes has Marshall County, Iowa had?

39 tornadoes touched Marshall County, Iowa between 1950 and 2025 in the NOAA Storm Prediction Center database — about 0.5 per year.

What was the strongest tornado in Marshall County?

The strongest rating recorded was F4 on May 24, 1989, with a 66-mile path.

When is tornado season in Marshall County?

Most of its tornadoes happened in June (12 of 39). 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).