Outbreaks* of Four or More Significant
(F2-F5)Tornadoes
in the NWS St. Louis County Warning Area
| Date | Time (CST) | F-Scale | Killed | Injured | Counties Affected |
| 4/18/1883 | 500 pm | F2 | n/a | n/a | Gasconade |
| 600 pm | F3 | 1 | 8 | Osage, Gasconade, Montgomery MO, Warren | |
| 620 pm | F4 | 8 | 50 | Greene | |
| 630 pm | F3 | 0 | 5 | Gasconade, Warren | |
| 700 pm | F3 | 1 | 6 | Warren, St. Charles | |
| 800 pm | F3 | 1 | 3 | Madison IL | |
| 815 pm | F2 | 2 | 15 | Jersey | |
| 830 pm | F3 | 5 | 30 | Madison IL, Macoupin | |
| 845 pm | F4 | 5 | 30 | Macoupin | |
| 930 pm | F3 | 2 | 10 | Madison, Macoupin, Montgomery | |
| 1030 pm | F3 | 0 | 1 | Montgomery | |
| 3/27/1890 | 300 pm | F2 | 0 | 0 | Ste Genevieve, Randolph |
| 300 pm | F2 | 0 | 2 | Ste Genevieve | |
| 300 pm | F2 | 3 | 25 | Randolph | |
| 315 pm | F2 | 1 | 7 | St. Clair | |
| 515 pm | F3 | 2 | 50 | Randolph, Washington IL | |
| 5/27/1896 | n/a | F2 | 1 | 1 | Montgomery MO, Lincoln |
| 145 pm | F2 | 0 | 0 | Audrain | |
| 315 pm | F3 | 6 | 50 | Audrain | |
| 615 pm | F4 | 2 | 3 | Osage | |
| 620 pm | F4 | 14 | 50 | Washington IL | |
| 630 pm | F4 | 255 | 1000 | St. Louis City, Madison IL | |
| 645 pm | F4 | 24 | 125 | St Clair, Clinton | |
| 830 pm | F2 | 3 | n/a | Washington IL | |
| 5/30/1917 | 100 pm | F4 | 10 | 100 | Crawford, Washington, St. Francois, Jefferson |
| 400 pm | F2 | 0 | 0 | Madison MO, St. Francois | |
| 400 pm | F3 | 7 | 25 | Reynolds, Iron, St. Francois | |
| 430 pm | F2 | 3 | 5 | Madison MO | |
| 500 pm | F2 | 0 | 0 | Ste Genevieve, Randolph | |
| 600 pm | F3 | 1 | 4 |
Ste Genevieve, Randolph |
|
| n/a | F2 | 0 | 1 | Franklin | |
| 3/15/1938 | 1150 am | F2 | 1 | 18 | Crawford, Washington MO, Jefferson, Monroe IL |
| 320 pm | F2 | 0 | 0 | Randolph, Monroe IL | |
| 450 pm | F4 | 10 | 12 | St Clair | |
| 550 pm | F3 | 0 | 12 | Randolph, St Clair, Washington IL | |
| 3/30/1938 | 1136 am | F2 | 1 | 18 | Boone, Callaway, Audrain |
| 115 pm | F2 | 0 | 6 | Shelby, Marion MO | |
| 300 pm | F2 | 0 | 8 | Callaway | |
| 300 pm | F3 | 13 | 73 | Adams, Brown | |
| 400 pm | F2 | 0 | 0 | Adams | |
| 553 pm | F3 | 0 | 13 | St. Charles, Madison IL, Macoupin, Montgomery IL | |
| 645 pm | F3 | 0 | 3 | Madison IL | |
| 800 pm | F2 | 0 | 0 | Randolph | |
| 3/19/1948 | 530 am | F2 | 0 | 0 | St. Charles |
| 615 am | F4 | 4 | 38 | Washington MO, St. Francois | |
| 630 am | F4 | 33 | 449 | Madison IL, Macoupin | |
| 645 am | F2 | 0 | 0 | Monroe IL, St. Clair | |
| 650 am | F2 | 0 | n/a | Franklin | |
| 700 am | F2 | 0 | 18 | Franklin | |
| 800 am | F4 | 0 | 2 | Montgomery IL | |
| 5/21/1949 | 400 pm | F2 | 0 | 0 | Franklin |
| 430 pm | F2 | 0 | 2 | St. Louis | |
| 430 pm | F2 | 0 | 0 | St. Louis, St Charles, Madison IL | |
| 450 pm | F4 | 5 | 55 | Ralls, Marion MO, Pike IL | |
| 12/18/1957 | 150 pm | F2 | 0 | 1 | St Francois |
| 240 pm | F3 | 0 | 0 | Randolph | |
| 315 pm | F3 | 0 | 0 | Randolph | |
| 320 pm | F2 | 0 | 1 | Madison IL | |
| 415 pm | F3 | 0 | 0 | Randolph | |
| 6/12/1970 | 400 pm | F2 | 0 | 0 | Shelby |
| 430 pm | F2 | 0 | 0 | Lewis | |
| 440 pm | F3 | 0 | 0 | Audrain | |
| 540 pm | F2 | 0 | 0 | Pike MO | |
| 5/1/1983 | 230 pm | F3 | 0 | 3 | Osage |
| 330 pm | F2 | 0 | 3 | Warren | |
| 430 pm | F3 | 0 | 15 | Greene | |
| 515 pm | F2 | 0 | 1 | Jersey | |
| 515 pm | F2 | 0 | 3 | St Charles | |
| 523 pm | F2 | 0 | 1 | Jersey | |
| 720 pm | F3 | 0 | 0 | St Louis City | |
| 723 pm | F3 | 0 | 3 | Madison IL | |
| 810 pm | F2 | 0 | 20 | St Clair | |
| 11/15/1988 | 825 pm | F3 | 0 | 10 | St Charles |
| 930 pm | F2 | 0 | 0 | Greene | |
| 1012 pm | F2 | 0 | 0 | St Clair | |
| 1028 pm | F3 | 0 | 0 | St Clair, Madison IL | |
| 4/8/1999 | 435 pm | F2 | 0 | 0 | Knox |
| 455 pm | F2 | 0 | 5 | Boone | |
| 505 pm | F2 | 0 | 0 | Boone | |
| 505 pm | F2 | 0 | 2 | Lewis | |
| 634 pm | F2 | 0 | 0 | Pike MO, Pike IL | |
| 5/10/2003 | 433 pm | F2 | 0 | 0 | Knox |
| 508 pm | F2 | 0 | 10 | Lewis, Adams | |
| 530 pm | F3 | 0 | 0 | Monroe MO, Marion MO, Ralls | |
| 620 pm | F2 | 0 | 0 | Adams, Brown | |
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* An outbreak is defined as an event that has no consecutive tornadoes more than 6 hours apart. |
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