Illinois, 1999

Hail and Damaging Wind in Illinois, April 21, 1999

April 21, 1999 · NWS LOT · 5 events in 4 counties and zones

4 hail, 1 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
None recorded
Crop damage
None recorded
Events
5

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.

The radar

The Chicago radar (KLOT), 55 km away, was scanning. The volume nearest the first event began at 00:07 UTC.

Open the radar archive at this moment

Event by event

4 hail, 1 thunderstorm wind. Local standard time, as filed.

Hail, Kankakee

When
April 21, 6:05 PM CST
Where
Kankakee County, Reddick to Herscher
Measured
1.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
41.120, -88.230

Thunderstorm Wind, Kankakee

When
April 21, 6:15 PM CST
Where
Kankakee County, Momence
Measured
50 kt (58 mph)
Reported by
TRAINED SPOTTER
Coordinates
41.170, -87.670

Two power poles were blown down.

Hail, Kane

When
April 21, 7:39 PM CST
Where
Kane County, St Charles
Measured
1 in hail
Reported by
TRAINED SPOTTER
Coordinates
41.920, -88.320

Hail, Cook

When
April 21, 8:10 PM CST
Where
Cook County, Schaumburg
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
42.030, -88.080

Hail, Du Page

When
April 21, 8:20 PM CST to 8:25 PM CST
Where
Du Page County, Bartlett to Elmhurst
Measured
1.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
42.000, -88.180

Hail 7/8 inch in diameter fell at Bartlett and golf ball sized hail fell at Elmhurst.

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.

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

The same day elsewhere

More

Every storm in Illinois in 1999Every state in 1999This day in weather historyWarnings in Illinois, April 1999

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: 5696358, 5696359, 5696362, 5696360, 5696361.