Illinois, 1999

Tornado and Hail in Illinois, April 22, 1999

April 22, 1999 · NWS DVN · 2 events in 2 counties and zones

3/4 inch hail was reported in Kewanee in Henry County while a tornado was spotted south of Monmouth in Warren County. No damage was reported with the tornado and was rated an F0.

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
0
Property damage
None recorded
Crop damage
None recorded
Events
2

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.

What happened

The episode as NWS DVN wrote it up.

Severe thunderstorms brought hail..gusty winds and heavy rain to portions of Henry and Warren Counties.3/4 inch hail was reported in Kewanee in Henry County while a tornado was spotted south of Monmouth in Warren County. No damage was reported with the tornado and was rated an F0.

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

1 hail, 1 tornado. Local standard time, as filed.

Hail, Henry

When
April 22, 3:30 PM CST
Where
Henry County, Kewanee
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
41.230, -89.930

Tornado, Warren

When
April 22, 8:50 PM CST
Where
Warren County, 2 mi S of Monmouth
Rating
F0
Path length
0.1 mi
Path width
10 yd
Reported by
TRAINED SPOTTER
Coordinates
40.880, -90.630

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.

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 historyThe tornado archive for Illinois, 1999Warnings 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: 5710806, 5710807.