O'Brien County tornado history

36 tornadoes touched O'Brien County, Iowa between 1950 and 2025 — about 0.5 a year. The strongest was rated F3 (May 5, 1964).

36tornadoes since 1950
F3strongest rating
0killed · 9 injured
67 milongest path · 1964
(E)F0(E)F1(E)F2(E)F3(E)F4(E)F5· dots = start point only

By rating

(E)F018
(E)F111
(E)F24
(E)F32
(E)F40
(E)F50
unrated1

By month

JFMAMJJASOND

Peak month: June.

By decade

’50’60’70’80’90’00’10’20

Strongest tornadoes

DateRatingPathWidthInjuredKilled
May 5, 1964F367 mi300 yd70
Oct 1, 1971F311.2 mi10 yd00
May 5, 1965F221.8 mi10 yd00
Jun 11, 2008EF25.7 mi300 yd00
Jul 19, 1980F23.3 mi160 yd00
Apr 3, 1968F20.5 mi100 yd00
Jun 13, 2001F17 mi200 yd00
Jun 7, 1984F16 mi77 yd00
Dec 15, 2021EF13.9 mi100 yd00
Jun 25, 2010EF13.3 mi100 yd00
Jun 7, 1993F11.8 mi67 yd00
Apr 8, 1969F11 mi300 yd00

Most recent tornadoes

DateRatingPathWidthInjuredKilled
Jul 20, 2024unrated0.6 mi25 yd00
May 31, 2024EF00.9 mi75 yd00
Dec 15, 2021EF13.9 mi100 yd00
Oct 23, 2015EF00.2 mi50 yd00
May 11, 2014EF00.5 mi50 yd00
May 4, 2012EF00.5 mi50 yd00
Jun 25, 2010EF00.6 mi200 yd00
Jun 25, 2010EF13.3 mi100 yd00
Jun 22, 2010EF00.1 mi50 yd00
Jun 1, 2010EF00.3 mi50 yd00
Jun 11, 2008EF00.9 mi50 yd00
Jun 11, 2008EF25.7 mi300 yd00

Nearby counties

Osceola County, IA31Cherokee County, IA30Clay County, IA38Sioux County, IA51Dickinson County, IA28Buena Vista County, IA29Lyon County, IA45Plymouth County, IA52

Questions

How many tornadoes has O'Brien County, Iowa had?

36 tornadoes touched O'Brien County, Iowa between 1950 and 2025 in the NOAA Storm Prediction Center database — about 0.5 per year.

What was the strongest tornado in O'Brien County?

The strongest rating recorded was F3 on May 5, 1964, with a 67-mile path.

When is tornado season in O'Brien County?

Most of its tornadoes happened in June (15 of 36). 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).