Thunderstorm Wind, De Kalb
- When
- May 21, 12:20 PM CST
- Where
- De Kalb County
- Coordinates
- 41.780, -88.780
Tornadoes and Hail in Illinois, May 21, 1957
4 tornado, 3 thunderstorm wind, 1 hail, as filed by the National Weather Service.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- $775,000
- Crop damage
- None recorded
- Events
- 8
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
Event by event
4 tornado, 3 thunderstorm wind, 1 hail. Local standard time, as filed.
Hail, Clinton
- When
- May 21, 3:46 PM CST
- Where
- Clinton County
- Measured
- 1.5 in hail
- Coordinates
- 38.500, -89.180
Thunderstorm Wind, Clinton
- When
- May 21, 3:46 PM CST
- Where
- Clinton County
- Measured
- 65 kt (75 mph)
- Coordinates
- 38.500, -89.180
Tornado, Monroe
- When
- May 21, 3:50 PM CST
- Where
- Monroe County
- Rating
- F2
- Path length
- 19.7 mi
- Path width
- 150 yd
- Property damage
- $250,000
- Coordinates
- 38.420, -90.200
Tornado, Richland
- When
- May 21, 5:00 PM CST
- Where
- Richland County
- Rating
- F2
- Path length
- 3.6 mi
- Path width
- 150 yd
- Property damage
- $25,000
- Coordinates
- 38.700, -87.980
Thunderstorm Wind, Fayette
- When
- May 21, 5:30 PM CST
- Where
- Fayette County
- Measured
- 65 kt (75 mph)
- Coordinates
- 39.000, -89.080
Tornado, Union
- When
- May 21, 6:07 PM CST
- Where
- Union County
- Rating
- F3
- Path length
- 8.5 mi
- Path width
- 200 yd
- Property damage
- $250,000
- Coordinates
- 37.570, -89.320
Tornado, McDonough
- When
- May 21, 7:40 PM CST
- Where
- McDonough County
- Rating
- F3
- Path length
- 13.7 mi
- Path width
- 120 yd
- Property damage
- $250,000
- Coordinates
- 40.500, -90.800
What these are
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- Tornado
- A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornadoes and Hail in Missouri, May 21, 1957
- Tornadoes in Minnesota, May 21, 1957
- Tornado and Hail in Iowa, May 21, 1957
- Tornado and Damaging Winds in Indiana, May 21, 1957
- Hail and Damaging Winds in Arkansas, May 21, 1957
- Hail and Damaging Wind in Oklahoma, May 21, 1957
- Hail in Texas, May 21, 1957
- Damaging Winds in Tennessee, May 21, 1957
- Damaging Winds in Kentucky, May 21, 1957
More
Every storm in Illinois in 1957Every state in 1957This day in weather historyThe tornado archive for Illinois, 1957
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 10008618, 10008619, 10008620, 10008621, 10008622, 10008623, 10008624, 10008625.