Grundy County tornado history

26 tornadoes touched Grundy County, Illinois between 1950 and 2025 — about 0.3 a year. The strongest was rated F3 (Jul 17, 1972). Tornadoes here killed 2 and injured 106 people.

26tornadoes since 1950

F3strongest rating

2killed · 106 injured

81.5 milongest path · 1972

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

By rating

(E)F09

(E)F15

(E)F29

(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

Date	Rating	Path	Width	Injured	Killed
Jul 17, 1972	F3	81.5 mi	200 yd	0	0
Jun 22, 2015	EF3	16.3 mi	1,320 yd	7	0
Nov 12, 1965	F2	35.9 mi	120 yd	90	2
Jul 15, 2024	EF2	34.6 mi	325 yd	2	0
Nov 12, 1965	F2	32.1 mi	17 yd	0	0
Dec 3, 1955	F2	32 mi	10 yd	0	0
Apr 5, 1988	F2	30 mi	50 yd	0	0
Nov 17, 2013	EF2	12 mi	200 yd	5	0
Jun 22, 2016	EF2	8.1 mi	300 yd	0	0
May 20, 1975	F2	2 mi	50 yd	1	0
Apr 19, 1973	F2	0.1 mi	10 yd	0	0
Jun 22, 2015	EF1	7 mi	150 yd	0	0

Most recent tornadoes

Date	Rating	Path	Width	Injured
Jul 15, 2024	EF2	34.6 mi	325 yd	2
Jul 28, 2023	EF0	5.1 mi	250 yd	0
May 23, 2020	EF0	6.3 mi	100 yd	1
May 17, 2020	unrated	0.5 mi	25 yd	0
Feb 28, 2017	EF0	1.2 mi	200 yd	0
Jun 22, 2016	EF2	8.1 mi	300 yd	0
Jun 22, 2016	EF0	0.7 mi	100 yd	0
Jun 22, 2015	EF1	7 mi	150 yd	0
Jun 22, 2015	EF1	0.8 mi	100 yd	0
Jun 22, 2015	EF3	16.3 mi	1,320 yd	7
Jun 30, 2014	EF0	2.2 mi	50 yd	0
Nov 17, 2013	EF2	12 mi	200 yd	5

Deadliest: Nov 12, 1965, F2, 2 killed.

Nearby counties

Kendall County, IL32 Will County, IL100 LaSalle County, IL66 Livingston County, IL54 Kankakee County, IL62 DuPage County, IL46 Kane County, IL46 DeKalb County, IL30

Questions

How many tornadoes has Grundy County, Illinois had?

26 tornadoes touched Grundy County, Illinois between 1950 and 2025 in the NOAA Storm Prediction Center database — about 0.3 per year.

What was the strongest tornado in Grundy County?

The strongest rating recorded was F3 on Jul 17, 1972, with a 81.5-mile path.

When is tornado season in Grundy County?

Most of its tornadoes happened in June (8 of 26). 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).