Cass County tornado history

43 tornadoes touched Cass County, Iowa between 1950 and 2025 — about 0.6 a year. The strongest was rated F4 (Apr 8, 1999).

43tornadoes since 1950
F4strongest rating
0killed · 13 injured
49 milongest path · 1999
(E)F0(E)F1(E)F2(E)F3(E)F4(E)F5· dots = start point only

By rating

(E)F013
(E)F114
(E)F29
(E)F32
(E)F41
(E)F50
unrated4

By month

JFMAMJJASOND

Peak month: June.

By decade

’50’60’70’80’90’00’10’20

Strongest tornadoes

DateRatingPathWidthInjuredKilled
Apr 8, 1999F449 mi1,000 yd30
May 13, 1974F310.9 mi20 yd00
Apr 20, 1964F36.1 mi350 yd10
Dec 15, 2021EF227.1 mi100 yd00
Jun 7, 1984F223 mi150 yd80
Jun 13, 1976F220 mi100 yd00
May 6, 2007EF27.4 mi830 yd00
May 12, 1970F25.9 mi400 yd00
May 29, 1956F23.3 mi50 yd00
Aug 27, 1964F21 mi50 yd00
Apr 18, 1963F20.1 mi200 yd00
May 25, 1965F20.1 mi200 yd00

Most recent tornadoes

DateRatingPathWidthInjuredKilled
Jun 28, 2024unrated0.9 mi40 yd00
Jun 28, 2024EF02.4 mi50 yd00
Jun 28, 2024unrated0.4 mi30 yd00
Jun 28, 2024unrated0.3 mi20 yd00
Apr 16, 2024EF10.9 mi30 yd00
Jul 12, 2023EF01.5 mi50 yd00
Jul 12, 2023EF02.1 mi75 yd00
Dec 15, 2021EF227.1 mi100 yd00
Dec 15, 2021EF111.4 mi80 yd00
Jul 16, 2019unrated1.4 mi30 yd00
May 22, 2019EF11.1 mi50 yd00
Mar 22, 2011EF12.8 mi250 yd00

Nearby counties

Adair County, IA34Audubon County, IA16Montgomery County, IA32Adams County, IA28Shelby County, IA31Pottawattamie County, IA56Guthrie County, IA33Mills County, IA25

Questions

How many tornadoes has Cass County, Iowa had?

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

What was the strongest tornado in Cass County?

The strongest rating recorded was F4 on Apr 8, 1999, with a 49-mile path.

When is tornado season in Cass County?

Most of its tornadoes happened in June (13 of 43). 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.