Hail, Rock Island
- When
- May 23, 3:50 PM CST
- Where
- Rock Island County
- Measured
- 1.5 in hail
- Coordinates
- 41.580, -90.400
Tornado and Hail in Illinois, May 23, 1966
5 thunderstorm wind, 2 hail, 1 tornado, 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
- $250,000
- 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
5 thunderstorm wind, 2 hail, 1 tornado. Local standard time, as filed.
Hail, Adams
- When
- May 23, 4:28 PM CST
- Where
- Adams County
- Measured
- 2 in hail
- Coordinates
- 39.880, -91.180
Thunderstorm Wind, Henry
- When
- May 23, 4:45 PM CST
- Where
- Henry County
- Coordinates
- 41.380, -90.080
Thunderstorm Wind, La Salle
- When
- May 23, 5:30 PM CST
- Where
- La Salle County
- Coordinates
- 41.280, -89.080
Thunderstorm Wind, Whiteside
- When
- May 23, 5:40 PM CST
- Where
- Whiteside County
- Coordinates
- 41.780, -89.680
Tornado, Fulton
- When
- May 23, 6:00 PM CST
- Where
- Fulton County
- Rating
- F1
- Path length
- 2 mi
- Path width
- 100 yd
- Property damage
- $250,000
- Coordinates
- 40.220, -90.370
Thunderstorm Wind, Lee
- When
- May 23, 6:00 PM CST
- Where
- Lee County
- Coordinates
- 41.880, -89.080
Thunderstorm Wind, Jackson
- When
- May 23, 9:08 PM CST
- Where
- Jackson County
- Coordinates
- 37.780, -89.280
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- 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.
- 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 Texas, May 23, 1966
- Tornado and Damaging Winds in Wisconsin, May 23, 1966
- Tornadoes and Damaging Winds in Iowa, May 23, 1966
- Tornadoes and Hail in Missouri, May 23, 1966
- Tornado and Damaging Wind in Michigan, May 23, 1966
- Hail and Damaging Winds in Florida, May 23, 1966
- Hail and Damaging Wind in Oklahoma, May 23, 1966
- Tornado and Damaging Wind in North Dakota, May 23, 1966
- Damaging Wind in Minnesota, May 23, 1966
More
Every storm in Illinois in 1966Every state in 1966This day in weather historyThe tornado archive for Illinois, 1966
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: 10008843, 10008844, 10008845, 10008846, 10008847, 10008848, 10008849, 10008850.