Illinois, 1984

Hail and Damaging Winds in Illinois, May 18, 1984

May 18, 1984 · NWS MT · 4 events in 2 counties and zones

2 thunderstorm wind, 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

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
4

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

2 thunderstorm wind, 2 hail. Local standard time, as filed.

Thunderstorm Wind, Boone

When
May 18, 1:00 PM CST
Where
Boone County
Coordinates
42.320, -88.820

Hail, Winnebago

When
May 18, 5:40 PM CST
Where
Winnebago County
Measured
1.75 in hail
Coordinates
42.320, -89.050

Thunderstorm Wind, Boone

When
May 18, 5:50 PM CST
Where
Boone County
Coordinates
42.250, -88.850

Hail, Winnebago

When
May 18, 6:05 PM CST
Where
Winnebago County
Measured
0.75 in hail
Coordinates
42.320, -88.980

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.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Illinois in 1984Every state in 1984This day in weather history

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: 10004113, 10004114, 10004115, 10004116.