In this section, the most active severe weather days in the NWS Chicago forecast area are ranked by number of reports of each specific hazard.
Severe weather can be broken up into three categories, as defined below:
| |
Tornado (EF Scale) |
Damaging Wind Gust (More info) |
Hail Diameter |
| All Report |
Any Rating |
Any Speed >= 58 mph |
Any Size >=1" |
| Significant Report |
F/EF2, F/EF3, F/EF4, F/EF5 |
>= 75 mph |
>= 2" |
| Non-Significant Report |
F/EFU, F/EF0, F/EF/1 |
< 75 mph |
< 2"
|
Page last updated: May 12, 2022
Period of Record: 1950 - 2020
Find any errors or have questions? Email nws.chicago@noaa.gov
Tornadoes
|
Tornadoes
| Rank |
Date |
Count |
| 1 |
6/30/2014 |
22 |
| 2 |
8/10/2020 |
15 |
| - |
6/22/2016 |
15 |
| 3 |
5/18/2000 |
13 |
| 4 |
4/21/1967 |
12 |
| 5 |
4/20/2004 |
11 |
| - |
5/30/2003 |
11 |
| - |
6/20/1974 |
11 |
| 6 |
8/9/2021 |
10 |
| - |
6/5/2010 |
10 |
| - |
6/30/1977 |
10 |
| 7 |
6/22/2015 |
9 |
| 8 |
11/17/2013 |
8 |
| - |
6/7/2008 |
8 |
| 9 |
4/9/2015 |
7 |
| - |
3/12/1976 |
7 |
| - |
4/6/1972 |
7 |
| 10 |
2/28/2017 |
6 |
| - |
5/22/2011 |
6 |
| - |
8/4/2008 |
6 |
| - |
5/30/2004 |
6 |
| - |
5/8/1988 |
6 |
| - |
9/26/1959 |
6 |
|
Significant Tornadoes
| Rank |
Date |
Count |
| 1 |
4/21/1967 |
6 |
| 2 |
3/12/1976 |
5 |
| 3 |
6/7/2008 |
4 |
| - |
11/12/1965 |
4 |
| 4 |
11/17/2013 |
3 |
| - |
6/5/2010 |
3 |
| - |
4/6/1972 |
3 |
| - |
4/11/1965 |
3 |
| - |
4/30/1962 |
3 |
| 5 |
2/28/2017 |
2 |
| - |
6/22/2016 |
2 |
| - |
6/22/2015 |
2 |
| - |
6/30/2014 |
2 |
| - |
4/20/2004 |
2 |
| - |
6/25/1978 |
2 |
| - |
6/30/1977 |
2 |
| - |
4/23/1976 |
2 |
| - |
6/9/1966 |
2 |
| - |
5/26/1965 |
2 |
| - |
9/26/1959 |
2 |
| - |
8/23/1956 |
2 |
| - |
3/5/1956 |
2 |
| - |
6/1/1954 |
2 |
|
Damaging Winds
|
Damaging Winds
| Rank |
Date |
Count |
| 1 |
8/10/2020 |
171 |
| 2 |
8/23/2007 |
99 |
| 3 |
8/4/2008 |
98 |
| 4 |
6/18/2010 |
91 |
| 5 |
7/11/2011 |
86 |
| 6 |
6/23/2010 |
81 |
| 7 |
6/21/2011 |
74 |
| 8 |
8/11/2021 |
63 |
| 9 |
7/29/2021 |
62 |
| 10 |
6/19/2009 |
57 |
|
Significant Winds
| Rank |
Date |
Count |
| 1 |
8/10/2020 |
77 |
| 2 |
6/21/2011 |
32 |
| 3 |
6/23/2010 |
24 |
| 4 |
8/23/2007 |
22 |
| 5 |
6/30/2014 |
15 |
| - |
7/11/2011 |
15 |
| - |
8/4/2008 |
15 |
| 6 |
5/23/2019 |
14 |
| - |
6/24/2013 |
14 |
| 7 |
6/4/2011 |
13 |
| 8 |
7/1/2012 |
11 |
| - |
6/18/2010 |
11 |
| 9 |
11/17/2013 |
10 |
| 10 |
6/12/2013 |
9 |
|
Damaging Hail
|
Damaging Hail
| Rank |
Date |
Count |
| 1 |
4/7/2020 |
36 |
| - |
7/17/2003 |
36 |
| 2 |
5/20/2014 |
33 |
| 3 |
8/1/2003 |
31 |
| 4 |
4/12/2014 |
28 |
| - |
6/12/2013 |
28 |
| - |
3/30/2005 |
28 |
| - |
5/18/2000 |
28 |
| 5 |
8/2/2015 |
24 |
| 6 |
10/2/2006 |
22 |
| 7 |
5/16/2019 |
21 |
| - |
4/5/2010 |
21 |
| 8 |
9/7/2021 |
19 |
| - |
6/8/2015 |
19 |
| 9 |
5/2/2018 |
18 |
| - |
8/13/2011 |
18 |
| - |
4/14/2006 |
18 |
| 10 |
6/28/2012 |
17 |
| - |
4/26/1994 |
17 |
|
Significant Hail
| Rank |
Date |
Count |
| 1 |
4/7/2020 |
5 |
| - |
5/2/2018 |
5 |
| - |
5/20/2014 |
5 |
| - |
6/30/2011 |
5 |
| - |
7/17/2003 |
5 |
| 2 |
4/15/1992 |
4 |
| 3 |
7/13/2015 |
3 |
| - |
6/10/2015 |
3 |
| - |
4/12/2014 |
3 |
| - |
7/13/2004 |
3 |
| - |
6/20/1981 |
3 |
| - |
6/7/1980 |
3 |
| 4 |
8/13/2011 |
2 |
| - |
4/13/2006 |
2 |
| - |
5/19/2005 |
2 |
| - |
5/12/1998 |
2 |
| - |
5/5/1997 |
2 |
| - |
4/23/1961 |
2 |
| - |
6/8/1958 |
2 |
|
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