Illinois, 1977

Tornadoes and Damaging Winds in Illinois, June 30, 1977

June 30, 1977 · NWS DAT · 13 events in 8 counties and zones

8 tornado, 5 thunderstorm wind, 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

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The toll

Deaths
0
Injuries
0
Property damage
$328,000
Crop damage
None recorded
Events
13

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

8 tornado, 5 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, Bureau

When
June 30, 8:30 AM CST
Where
Bureau County
Coordinates
41.330, -89.680

Tornado, La Salle

When
June 30, 8:35 AM CST
Where
La Salle County
Path length
6.1 mi
Path width
850 yd
Property damage
$25,000
Coordinates
41.580, -89.000

Tornado, La Salle

When
June 30, 8:35 AM CST
Where
La Salle County
Path length
3.6 mi
Path width
177 yd
Coordinates
41.620, -88.800

Tornado, De Kalb

When
June 30, 8:45 AM CST
Where
De Kalb County
Path length
1.6 mi
Path width
90 yd
Property damage
$25,000
Coordinates
41.620, -88.620

Tornado, Kendall

When
June 30, 8:45 AM CST
Where
Kendall County
Path length
3 mi
Path width
177 yd
Coordinates
41.630, -88.530

Thunderstorm Wind, Kendall

When
June 30, 8:45 AM CST
Where
Kendall County
Coordinates
41.630, -88.450

Tornado, Kendall

When
June 30, 9:10 AM CST
Where
Kendall County
Path length
1.7 mi
Path width
350 yd
Coordinates
41.630, -88.450

Thunderstorm Wind, Will

When
June 30, 1:05 PM CST
Where
Will County
Measured
52 kt (60 mph)
Coordinates
41.480, -88.020

Tornado, Will

When
June 30, 1:15 PM CST
Where
Will County
Path length
0.4 mi
Path width
90 yd
Property damage
$3,000
Coordinates
41.400, -88.120

Tornado, Will

When
June 30, 1:30 PM CST
Where
Will County
Path length
2.3 mi
Path width
177 yd
Property damage
$25,000
Coordinates
41.380, -88.120

Tornado, Cook

When
June 30, 1:45 PM CST
Where
Cook County
Path length
1 mi
Path width
33 yd
Property damage
$250,000
Coordinates
41.500, -87.700

Thunderstorm Wind, St. Clair

When
June 30, 2:35 PM CST
Where
St. Clair County
Coordinates
38.320, -89.870

Thunderstorm Wind, Jackson

When
June 30, 3:45 PM CST
Where
Jackson County
Measured
62 kt (71 mph)
Coordinates
37.780, -89.250

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.
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 1977Every state in 1977This day in weather historyThe tornado archive for Illinois, 1977

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: 10004360, 10005205, 10005206, 10005418, 10005419, 10005420, 10005421, 10005422, 10005423, 10005424, 10005425, 10005426, 10005427.