Union County tornado history

24 tornadoes touched Union County, South Dakota between 1950 and 2025 — about 0.3 a year. The strongest was rated F3 (Jun 7, 1965).

24tornadoes since 1950
F3strongest rating
0killed · 1 injured
20 milongest path · 1985
(E)F0(E)F1(E)F2(E)F3(E)F4(E)F5· dots = start point only

By rating

(E)F015
(E)F17
(E)F21
(E)F31
(E)F40
(E)F50

By month

JFMAMJJASOND

Peak month: July.

By decade

’50’60’70’80’90’00’10’20

Strongest tornadoes

DateRatingPathWidthInjuredKilled
Jun 7, 1965F30.1 mi10 yd00
Jul 7, 1987F28 mi50 yd00
Aug 12, 1985F120 mi30 yd00
Jun 16, 1990F19 mi60 yd00
Oct 4, 2013EF16.5 mi800 yd00
Oct 4, 2013EF15.9 mi400 yd00
Jul 22, 1983F10.2 mi10 yd00
May 27, 1954F10.1 mi10 yd00
May 8, 1964F10.1 mi10 yd00
Jun 1, 1963F04.5 mi440 yd00
Apr 18, 2004F04 mi100 yd00
May 11, 2014EF02.4 mi50 yd00

Most recent tornadoes

DateRatingPathWidthInjuredKilled
May 11, 2014EF02.4 mi50 yd00
Oct 4, 2013EF15.9 mi400 yd00
Oct 4, 2013EF16.5 mi800 yd00
Jun 4, 2005F00.1 mi50 yd00
May 28, 2004F00.1 mi50 yd00
May 28, 2004F00.1 mi50 yd00
Apr 18, 2004F04 mi100 yd00
Aug 17, 2001F00.1 mi50 yd00
Jul 2, 1999F00.5 mi50 yd00
Jul 4, 1994F01 mi10 yd10
Jun 16, 1990F19 mi60 yd00
Jul 7, 1987F28 mi50 yd00

Nearby counties

Clay County, SD31Plymouth County, IA52Dixon County, NE27Sioux County, IA51Dakota County, NE9Lincoln County, SD59Cedar County, NE32Yankton County, SD28

Questions

How many tornadoes has Union County, South Dakota had?

24 tornadoes touched Union County, South Dakota between 1950 and 2025 in the NOAA Storm Prediction Center database — about 0.3 per year.

What was the strongest tornado in Union County?

The strongest rating recorded was F3 on Jun 7, 1965, with a 0.1-mile path.

When is tornado season in Union County?

Most of its tornadoes happened in July (9 of 24). 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).