Lyman County tornado history

40 tornadoes touched Lyman County, South Dakota between 1950 and 2025 — about 0.5 a year. The strongest was rated F3 (Jul 9, 1971).

40tornadoes since 1950

F3strongest rating

0killed · 2 injured

10.4 milongest path · 1960

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

By rating

(E)F026

(E)F18

(E)F23

(E)F32

(E)F40

(E)F50

unrated1

JFMAMJJASOND

Peak month: July.

’50’60’70’80’90’00’10’20

Date	Rating	Path	Width	Injured
Jul 9, 1971	F3	0.1 mi	10 yd	0
Jul 9, 1971	F3	0.1 mi	10 yd	2
Jul 25, 1960	F2	10.4 mi	10 yd	0
Aug 5, 1987	F2	1.2 mi	80 yd	0
Jun 4, 1971	F2	0.1 mi	10 yd	0
Jul 10, 1969	F1	2.3 mi	10 yd	0
Jul 6, 1987	F1	1 mi	73 yd	0
Jul 9, 1987	F1	0.5 mi	50 yd	0
Jun 27, 1993	F1	0.5 mi	40 yd	0
Jun 26, 1960	F1	0.1 mi	10 yd	0
Jun 21, 1962	F1	0.1 mi	10 yd	0
Jul 6, 1987	F1	0.1 mi	100 yd	0

Date	Rating	Path	Width
Jul 15, 2025	EF0	—	1 yd
Jun 12, 2022	unrated	0.2 mi	10 yd
Aug 9, 2019	EF0	0.1 mi	10 yd
May 8, 2011	EF0	0.1 mi	10 yd
Jul 23, 2010	EF0	0.3 mi	30 yd
Jun 11, 2003	F0	0.1 mi	25 yd
Jun 11, 2003	F0	0.5 mi	50 yd
Jun 11, 2003	F0	0.1 mi	25 yd
Jul 24, 2002	F0	0.1 mi	20 yd
May 9, 1999	F0	0.1 mi	10 yd
Jul 22, 1993	F0	0.2 mi	20 yd
Jul 18, 1993	F0	0.1 mi	20 yd

How many tornadoes has Lyman County, South Dakota had?

40 tornadoes touched Lyman County, South Dakota between 1950 and 2025 in the NOAA Storm Prediction Center database — about 0.5 per year.

What was the strongest tornado in Lyman County?

The strongest rating recorded was F3 on Jul 9, 1971, with a 0.1-mile path.

When is tornado season in Lyman County?

Most of its tornadoes happened in July (21 of 40). 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).