Tornado outbreak of April 20, 2004
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|duration= parameter from the infobox header or from another 'History' box instead.Memorial crosses, Utica | |
| Meteorological history | |
|---|---|
| Duration | April 20, 2004 |
| Tornado outbreak | |
| Tornadoes | 31 |
| Maximum rating | F3 tornado |
| Duration | Approximately 4 hours |
| Overall effects | |
| Fatalities | 8 (+1 indirect) |
| Injuries | 21 |
| Areas affected | Illinois, Indiana, Iowa |
Part of the tornado outbreaks of 2004 | |
A destructive tornado outbreak devastated parts of the U.S. Upper Midwest on April 20, 2004. A total of 31 tornadoes formed in eastern Iowa, extending into northern and central Illinois and Indiana. A tornado that struck Utica, Illinois, was the only one to cause fatalities. The outbreak was largely unexpected, as the SPC had only predicted a "slight risk" of severe weather in the afternoon of the event.