Lyon County tornado history

45 tornadoes touched Lyon County, Iowa between 1950 and 2025 — about 0.6 a year. The strongest was rated EF4 (Jun 25, 2010). Tornadoes here killed 1 and injured 22 people.

45tornadoes since 1950

EF4strongest rating

1killed · 22 injured

46.5 milongest path · 1971

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

By rating

(E)F019

(E)F116

(E)F27

(E)F31

(E)F41

(E)F50

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 25, 2010	EF4	13.7 mi	800 yd	13	0
May 31, 1971	F3	46.5 mi	100 yd	0	0
Apr 26, 1986	F2	18.5 mi	120 yd	4	1
Jul 6, 1978	F2	14.2 mi	200 yd	0	0
May 1, 2008	EF2	12.9 mi	400 yd	0	0
May 7, 1993	F2	11.5 mi	100 yd	0	0
Jun 7, 1993	F2	10 mi	127 yd	5	0
Apr 26, 1986	F2	9.5 mi	70 yd	0	0
Jun 19, 1954	F2	2.3 mi	880 yd	0	0
Apr 25, 1994	F1	7 mi	40 yd	0	0
Aug 17, 2019	EF1	7 mi	75 yd	0	0
Apr 18, 2004	F1	4 mi	100 yd	0	0

Most recent tornadoes

Date	Rating	Path	Width	Injured
Jul 28, 2025	EF1	2.1 mi	250 yd	0
Jul 28, 2025	unrated	0.2 mi	50 yd	0
Apr 16, 2024	EF1	1 mi	75 yd	0
May 30, 2022	EF1	1.9 mi	100 yd	0
May 30, 2022	EF0	0.5 mi	60 yd	0
Aug 17, 2019	EF1	7 mi	75 yd	0
Jun 17, 2014	EF0	0.3 mi	50 yd	0
Jun 16, 2014	EF0	0.2 mi	50 yd	0
Jun 25, 2010	EF4	13.7 mi	800 yd	13
Jun 25, 2010	EF1	1.2 mi	100 yd	0
Jun 21, 2009	EF0	0.4 mi	50 yd	0
Jun 11, 2008	EF0	0.8 mi	50 yd	0

Deadliest: Apr 26, 1986, F2, 1 killed.

Nearby counties

Rock County, MN16 Sioux County, IA51 Lincoln County, SD59 Osceola County, IA31 Nobles County, MN43 Minnehaha County, SD52 O'Brien County, IA36 Pipestone County, MN15

Questions

How many tornadoes has Lyon County, Iowa had?

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

What was the strongest tornado in Lyon County?

The strongest rating recorded was EF4 on Jun 25, 2010, with a 13.7-mile path.

When is tornado season in Lyon County?

Most of its tornadoes happened in June (15 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).