Illinois, 1977

Tornadoes and Hail in Illinois, August 6, 1977

August 6, 1977 · NWS ATA · 23 events in 4 counties and zones

19 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

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The toll

Deaths
0
Injuries
0
Property damage
$2.8 million
Crop damage
None recorded
Events
23

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

19 tornado, 3 thunderstorm wind, 1 hail. Local standard time, as filed.

Hail, Washington

When
August 6, 3:00 PM CST
Where
Washington County
Measured
1.75 in hail
Coordinates
38.300, -89.620

Tornado, Sangamon

When
August 6, 3:25 PM CST
Where
Sangamon County
Rating
F1
Path length
7.8 mi
Path width
60 yd
Coordinates
39.530, -89.720

Tornado, Sangamon

When
August 6, 3:30 PM CST
Where
Sangamon County
Rating
F0
Path length
0.8 mi
Path width
350 yd
Coordinates
39.620, -89.930

Tornado, Sangamon

When
August 6, 3:30 PM CST
Where
Sangamon County
Rating
F1
Path length
6.1 mi
Path width
60 yd
Coordinates
39.530, -89.830

Thunderstorm Wind, Christian

When
August 6, 3:30 PM CST
Where
Christian County
Coordinates
39.730, -89.400

Tornado, Sangamon

When
August 6, 3:35 PM CST
Where
Sangamon County
Rating
F0
Path length
0.8 mi
Path width
10 yd
Coordinates
39.630, -89.900

Tornado, Sangamon

When
August 6, 3:35 PM CST
Where
Sangamon County
Rating
F0
Path length
1.9 mi
Path width
23 yd
Coordinates
39.530, -89.700

Tornado, Sangamon

When
August 6, 3:36 PM CST
Where
Sangamon County
Rating
F1
Path length
1.3 mi
Path width
350 yd
Coordinates
39.630, -89.870

Tornado, Sangamon

When
August 6, 3:36 PM CST
Where
Sangamon County
Rating
F2
Path length
2.3 mi
Path width
350 yd
Coordinates
39.620, -89.850

Tornado, Sangamon

When
August 6, 3:37 PM CST
Where
Sangamon County
Rating
F1
Path length
1 mi
Path width
50 yd
Coordinates
39.530, -89.670

Tornado, Sangamon

When
August 6, 3:38 PM CST
Where
Sangamon County
Rating
F1
Path length
6.2 mi
Path width
33 yd
Property damage
$25,000
Coordinates
39.530, -89.750

Thunderstorm Wind, Morgan

When
August 6, 3:43 PM CST
Where
Morgan County
Measured
52 kt (60 mph)
Coordinates
39.580, -89.950

Tornado, Sangamon

When
August 6, 3:45 PM CST
Where
Sangamon County
Rating
F1
Path length
5.9 mi
Path width
30 yd
Coordinates
39.550, -89.600

Tornado, Sangamon

When
August 6, 3:45 PM CST
Where
Sangamon County
Rating
F3
Path length
4.1 mi
Path width
100 yd
Property damage
$2.5 million
Coordinates
39.630, -89.720

Tornado, Sangamon

When
August 6, 3:47 PM CST
Where
Sangamon County
Rating
F1
Path length
3.6 mi
Path width
150 yd
Coordinates
39.600, -89.630

Tornado, Sangamon

When
August 6, 3:50 PM CST
Where
Sangamon County
Rating
F0
Path length
0.6 mi
Path width
50 yd
Coordinates
39.670, -89.630

Tornado, Sangamon

When
August 6, 3:51 PM CST
Where
Sangamon County
Rating
F0
Path length
0.2 mi
Path width
17 yd
Coordinates
39.680, -89.620

Tornado, Sangamon

When
August 6, 3:53 PM CST
Where
Sangamon County
Rating
F0
Path length
0.2 mi
Path width
10 yd
Coordinates
39.630, -89.580

Tornado, Christian

When
August 6, 3:55 PM CST
Where
Christian County
Rating
F0
Path length
1.1 mi
Path width
17 yd
Coordinates
39.630, -89.520

Tornado, Sangamon

When
August 6, 3:57 PM CST
Where
Sangamon County
Rating
F1
Path length
2.2 mi
Path width
50 yd
Property damage
$250,000
Coordinates
39.650, -89.530

Tornado, Christian

When
August 6, 4:00 PM CST
Where
Christian County
Rating
F1
Path length
2.8 mi
Path width
40 yd
Coordinates
39.720, -89.430

Thunderstorm Wind, Sangamon

When
August 6, 4:00 PM CST
Where
Sangamon County
Coordinates
39.670, -89.670

Tornado, Sangamon

When
August 6, 4:10 PM CST
Where
Sangamon County
Rating
F1
Path length
3.3 mi
Path width
90 yd
Coordinates
39.730, -89.480

What these are

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.
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.

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: 10005449, 10005450, 10005451, 10005452, 10005453, 10005454, 10005455, 10005456, 10005457, 10005458, 10005459, 10005460, 10005461, 10005462, 10005463, 10005464, 10005465, 10005466, 10005467, 10005468, 10005469, 10005470, 10005471.