Illinois, 1975

Tornadoes and Hail in Illinois, April 18, 1975

April 18, 1975 · 29 events in 24 counties and zones

22 thunderstorm wind, 5 tornado, 2 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

Open the live radar over this ground

The toll

Deaths
0
Injuries
1
Property damage
$775,000
Crop damage
None recorded
Events
29

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

22 thunderstorm wind, 5 tornado, 2 hail. Local standard time, as filed.

Thunderstorm Wind, Adams

When
April 18, 8:05 AM CST
Where
Adams County
Measured
60 kt (69 mph)
Coordinates
39.920, -91.200

Hail, Lee

When
April 18, 10:20 AM CST
Where
Lee County
Measured
2.5 in hail
Coordinates
41.830, -89.530

Thunderstorm Wind, Warren

When
April 18, 2:00 PM CST
Where
Warren County
Measured
52 kt (60 mph)
Coordinates
40.930, -90.430

Thunderstorm Wind, Henry

When
April 18, 2:10 PM CST
Where
Henry County
Coordinates
41.170, -90.050

Thunderstorm Wind, Bureau

When
April 18, 2:20 PM CST
Where
Bureau County
Measured
52 kt (60 mph)
Coordinates
41.370, -89.470

Thunderstorm Wind, Stark

When
April 18, 2:30 PM CST
Where
Stark County
Measured
52 kt (60 mph)
Coordinates
41.080, -89.650

Thunderstorm Wind, La Salle

When
April 18, 3:00 PM CST
Where
La Salle County
Coordinates
41.530, -88.680

Tornado, Tazewell

When
April 18, 3:20 PM CST
Where
Tazewell County
Rating
F1
Path length
0.5 mi
Path width
50 yd
Property damage
$25,000
Coordinates
40.400, -89.420

Tornado, McLean

When
April 18, 4:13 PM CST
Where
McLean County
Rating
F0
Path length
0.2 mi
Path width
77 yd
Coordinates
40.700, -89.030

Tornado, Monroe

When
April 18, 5:10 PM CST
Where
Monroe County
Rating
F3
Path length
2 mi
Path width
30 yd
Injuries
1 direct, 0 indirect
Property damage
$250,000
Coordinates
38.250, -90.000

Hail, St. Clair

When
April 18, 5:30 PM CST
Where
St. Clair County
Measured
1.75 in hail
Coordinates
38.320, -89.870

Thunderstorm Wind, Washington

When
April 18, 5:45 PM CST
Where
Washington County
Coordinates
38.430, -89.370

Tornado, Clinton

When
April 18, 6:00 PM CST
Where
Clinton County
Rating
F1
Path length
2.5 mi
Path width
50 yd
Property damage
$250,000
Coordinates
38.570, -89.180

Thunderstorm Wind, Washington

When
April 18, 6:00 PM CST
Where
Washington County
Coordinates
38.450, -89.270

Thunderstorm Wind, Washington

When
April 18, 6:10 PM CST
Where
Washington County
Coordinates
38.430, -89.550

Thunderstorm Wind, Macoupin

When
April 18, 6:10 PM CST
Where
Macoupin County
Measured
56 kt (64 mph)
Coordinates
39.480, -90.100

Thunderstorm Wind, Greene

When
April 18, 6:15 PM CST
Where
Greene County
Measured
56 kt (64 mph)
Coordinates
39.480, -90.370

Tornado, Marion

When
April 18, 6:21 PM CST
Where
Marion County
Rating
F1
Path length
2 mi
Path width
50 yd
Property damage
$250,000
Coordinates
38.630, -88.950

Thunderstorm Wind, Marion

When
April 18, 6:30 PM CST
Where
Marion County
Coordinates
38.770, -88.850

Thunderstorm Wind, Coles

When
April 18, 6:40 PM CST
Where
Coles County
Measured
58 kt (67 mph)
Coordinates
39.480, -88.280

Thunderstorm Wind, Franklin

When
April 18, 6:45 PM CST
Where
Franklin County
Coordinates
38.100, -89.050

Thunderstorm Wind, Jackson

When
April 18, 6:50 PM CST
Where
Jackson County
Coordinates
37.880, -89.500

Thunderstorm Wind, Jefferson

When
April 18, 7:00 PM CST
Where
Jefferson County
Coordinates
38.320, -88.900

Thunderstorm Wind, Perry

When
April 18, 7:00 PM CST
Where
Perry County
Coordinates
38.130, -89.230

Thunderstorm Wind, Jackson

When
April 18, 7:05 PM CST
Where
Jackson County
Coordinates
37.900, -89.330

Thunderstorm Wind, Jackson

When
April 18, 7:20 PM CST
Where
Jackson County
Coordinates
37.850, -89.330

Thunderstorm Wind, Wayne

When
April 18, 7:30 PM CST
Where
Wayne County
Coordinates
38.350, -88.580

Thunderstorm Wind, Iroquois

When
April 18, 7:45 PM CST
Where
Iroquois County
Coordinates
40.880, -87.950

Thunderstorm Wind, White

When
April 18, 8:15 PM CST
Where
White County
Coordinates
38.080, -88.170

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

More

Every storm in Illinois in 1975Every state in 1975This day in weather historyThe tornado archive for Illinois, 1975

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: 10008094, 10008095, 10008096, 10008097, 10008098, 10008099, 10008100, 10008101, 10008102, 10008103, 10008104, 10008105, 10008106, 10008107, 10008108, 10008109, 10011236, 10006689, 10006690, 10006691, 10006692, 10006693, 10006694, 10006695, 10006696, 10006697, 10006698, 10006699, 10006700.