Delaware County tornado history

45 tornadoes touched Delaware County, Iowa between 1950 and 2025 — about 0.6 a year. The strongest was rated F4 (Apr 30, 1954).

45tornadoes since 1950

F4strongest rating

0killed · 26 injured

80.4 milongest path · 1954

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

By rating

(E)F012

(E)F114

(E)F210

(E)F34

(E)F43

(E)F50

unrated2

JFMAMJJASOND

Peak month: May.

’50’60’70’80’90’00’10’20

Date	Rating	Path	Width	Injured
Apr 30, 1954	F4	80.4 mi	200 yd	0
Mar 13, 1990	F4	19 mi	200 yd	0
Aug 12, 1974	F4	5 mi	400 yd	12
May 25, 2008	EF3	32 mi	1,232 yd	3
Jul 27, 1995	F3	20 mi	150 yd	0
Jun 19, 1993	F3	9 mi	200 yd	0
Jul 12, 1971	F3	0.1 mi	833 yd	2
Apr 30, 1954	F2	65.8 mi	200 yd	0
Sep 28, 1972	F2	64.5 mi	2,200 yd	3
Jun 26, 1969	F2	26.9 mi	300 yd	0
Mar 22, 1991	F2	17 mi	80 yd	1
Apr 30, 1954	F2	16.6 mi	50 yd	0

Date	Rating	Path	Width
Jul 11, 2025	EF0	1.7 mi	40 yd
Mar 31, 2023	EF1	4.1 mi	50 yd
Mar 31, 2023	EF1	11.1 mi	90 yd
Jul 14, 2021	EF1	1.4 mi	40 yd
Jul 14, 2021	EF1	1.1 mi	30 yd
Jul 14, 2021	unrated	0.4 mi	10 yd
Jun 9, 2019	unrated	7.3 mi	10 yd
Jun 28, 2017	EF2	2.5 mi	30 yd
Jul 23, 2016	EF1	0.1 mi	25 yd
Jul 23, 2016	EF1	0.2 mi	10 yd
Jun 19, 2014	EF1	15.7 mi	75 yd
Jun 16, 2014	EF1	12.6 mi	50 yd

How many tornadoes has Delaware County, Iowa had?

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

What was the strongest tornado in Delaware County?

The strongest rating recorded was F4 on Apr 30, 1954, with a 80.4-mile path.

When is tornado season in Delaware County?

Most of its tornadoes happened in May (9 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).